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Diffstat (limited to 'ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlibrgb.c')
| -rw-r--r-- | ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlibrgb.c | 3425 |
1 files changed, 3425 insertions, 0 deletions
diff --git a/ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlibrgb.c b/ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlibrgb.c new file mode 100644 index 00000000..eb7e4cdf --- /dev/null +++ b/ksvg/impl/libs/xrgbrender/gdk-pixbuf-xlibrgb.c @@ -0,0 +1,3425 @@ +/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- + * + * The contents of this file are subject to the Mozilla Public License + * Version 1.1 (the "MPL"); you may not use this file except in + * compliance with the MPL. You may obtain a copy of the MPL at + * http://www.mozilla.org/MPL/ + * + * Software distributed under the MPL is distributed on an "AS IS" basis, + * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the MPL + * for the specific language governing rights and limitations under the + * MPL. + * + * Alternatively, the contents of this file may be used under the + * terms of the GNU Library General Public License (the "LGPL"), in + * which case the provisions of the LGPL are applicable instead of + * those above. If you wish to allow use of your version of this file + * only under the terms of the LGPL and not to allow others to use + * your version of this file under the MPL, indicate your decision by + * deleting the provisions above and replace them with the notice and + * other provisions required by the LGPL. If you do not delete the + * provisions above, a recipient may use your version of this file + * under either the MPL or the LGPL. + */ + +/* + * This code is derived from GdkRgb. + * For more information on GdkRgb, see http://www.levien.com/gdkrgb/ + * Raph Levien <raph@acm.org> + */ + +/* Ported by Christopher Blizzard to Xlib. With permission from the + * original authors and the copyright holders of this file, the + * contents of this file are also redistributable under the terms of + * the Mozilla Public license. For information about the Mozilla + * Public License, please see the license information at + * http://www.mozilla.org/MPL/ */ + +/* This code is copyright the following authors: + * Raph Levien <raph@acm.org> + * Manish Singh <manish@gtk.org> + * Tim Janik <timj@gtk.org> + * Peter Mattis <petm@xcf.berkeley.edu> + * Spencer Kimball <spencer@xcf.berkeley.edu> + * Josh MacDonald <jmacd@xcf.berkeley.edu> + * Christopher Blizzard <blizzard@redhat.com> + * Owen Taylor <otaylor@redhat.com> + * Shawn T. Amundson <amundson@gtk.org> +*/ + +#include <math.h> + +#if HAVE_CONFIG_H +# include <config.h> +# if STDC_HEADERS +# include <stdio.h> +# include <stdlib.h> +# include <string.h> +# endif +#else +# include <stdio.h> +# include <stdlib.h> +#endif + +#define ENABLE_GRAYSCALE + +/* include this before so that we can get endian definitions if + they are there... */ + +#include "gdk-pixbuf-xlibrgb.h" +#include "gdk-pixbuf-xlib-private.h" + +#ifndef MIN +#define MIN(a, b) (((a) < (b)) ? (a) : (b)) +#endif + +#ifndef MAX +#define MAX(a, b) (((a) > (b)) ? (a) : (b)) +#endif + +typedef enum { + LSB_FIRST, + MSB_FIRST +} ByteOrder; + + +typedef struct _XlibRgbInfo XlibRgbInfo; + +typedef void (*XlibRgbConvFunc) (XImage *image, + int ax, int ay, + int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap); + +/* Some of these fields should go, as they're not being used at all. + Globals should generally migrate into here - it's very likely that + we'll want to run more than one GdkRgbInfo context at the same time + (i.e. some but not all windows have privately installed + colormaps). */ + +struct _XlibRgbInfo +{ + Display *display; + Screen *screen; + int screen_num; + XVisualInfo *x_visual_info; + Colormap cmap; + XColor *cmap_colors; + Visual *default_visualid; + Colormap default_colormap; + + unsigned long *color_pixels; + unsigned long *gray_pixels; + unsigned long *reserved_pixels; + + unsigned long red_shift; + unsigned long red_prec; + unsigned long blue_shift; + unsigned long blue_prec; + unsigned long green_shift; + unsigned long green_prec; + + unsigned int nred_shades; + unsigned int ngreen_shades; + unsigned int nblue_shades; + unsigned int ngray_shades; + unsigned int nreserved; + + unsigned int bpp; + unsigned int cmap_alloced; + double gamma_val; + + /* Generally, the stage buffer is used to convert 32bit RGB, gray, + and indexed images into 24 bit packed RGB. */ + unsigned char *stage_buf; + + XlibRgbCmap *gray_cmap; + + Bool dith_default; + + Bool bitmap; /* set true if in 1 bit per pixel mode */ + GC own_gc; + + /* Convert functions */ + XlibRgbConvFunc conv; + XlibRgbConvFunc conv_d; + + XlibRgbConvFunc conv_32; + XlibRgbConvFunc conv_32_d; + + XlibRgbConvFunc conv_gray; + XlibRgbConvFunc conv_gray_d; + + XlibRgbConvFunc conv_indexed; + XlibRgbConvFunc conv_indexed_d; +}; + +static Bool xlib_rgb_install_cmap = FALSE; +static int xlib_rgb_min_colors = 5 * 5 * 5; +static Bool xlib_rgb_verbose = FALSE; + +#define IMAGE_WIDTH 256 +#define STAGE_ROWSTRIDE (IMAGE_WIDTH * 3) +#define IMAGE_HEIGHT 64 +#define N_IMAGES 6 + +static XlibRgbInfo *image_info = NULL; +static XImage *static_image[N_IMAGES]; +static int static_image_idx; + +static unsigned char *colorcube; +static unsigned char *colorcube_d; + +static unsigned long +xlib_get_prec_from_mask(unsigned long val) +{ + unsigned long retval = 0; + unsigned int cur_bit = 0; + /* walk through the number, incrementing the value if + the bit in question is set. */ + while (cur_bit < (sizeof(unsigned long) * 8)) { + if ((val >> cur_bit) & 0x1) { + retval++; + } + cur_bit++; + } + return retval; +} + +static unsigned long +xlib_get_shift_from_mask(unsigned long val) +{ + unsigned long cur_bit = 0; + /* walk through the number, looking for the first 1 */ + while (cur_bit < (sizeof(unsigned long) * 8)) { + if ((val >> cur_bit) & 0x1) { + return cur_bit; + } + cur_bit++; + } + return cur_bit; +} + + +static int +xlib_rgb_cmap_fail (const char *msg, Colormap cmap, unsigned long *pixels) +{ + unsigned long free_pixels[256]; + int n_free; + int i; + +#ifdef VERBOSE + printf ("%s", msg); +#endif + n_free = 0; + for (i = 0; i < 256; i++) + if (pixels[i] < 256) + free_pixels[n_free++] = pixels[i]; + + if (n_free) + XFreeColors(image_info->display, + cmap, + free_pixels, + n_free, + 0); + return 0; +} + +static void +xlib_rgb_make_colorcube (unsigned long *pixels, int nr, int ng, int nb) +{ + unsigned char rt[16], gt[16], bt[16]; + int i; + + colorcube = malloc(sizeof(unsigned char) * 4096); + memset(colorcube, 0, (sizeof(unsigned char) * 4096)); + for (i = 0; i < 16; i++) + { + rt[i] = ng * nb * ((i * 17 * (nr - 1) + 128) >> 8); + gt[i] = nb * ((i * 17 * (ng - 1) + 128) >> 8); + bt[i] = ((i * 17 * (nb - 1) + 128) >> 8); + } + + for (i = 0; i < 4096; i++) + { + colorcube[i] = pixels[rt[i >> 8] + gt[(i >> 4) & 0x0f] + bt[i & 0x0f]]; +#ifdef VERBOSE + printf ("%03x %02x %x %x %x\n", i, colorcube[i], rt[i >> 8], gt[(i >> 4) & 0x0f], bt[i & 0x0f]); +#endif + } +} + +/* this is the colorcube suitable for dithering */ +static void +xlib_rgb_make_colorcube_d (unsigned long *pixels, int nr, int ng, int nb) +{ + int r, g, b; + int i; + + colorcube_d = malloc(sizeof(unsigned char) * 512); + memset(colorcube_d, 0, (sizeof(unsigned char) * 512)); + for (i = 0; i < 512; i++) + { + r = MIN (nr - 1, i >> 6); + g = MIN (ng - 1, (i >> 3) & 7); + b = MIN (nb - 1, i & 7); + colorcube_d[i] = pixels[(r * ng + g) * nb + b]; + } +} + +/* Try installing a color cube of the specified size. + Make the colorcube and return TRUE on success */ +static int +xlib_rgb_try_colormap (int nr, int ng, int nb) +{ + int r, g, b; + int ri, gi, bi; + int r0, g0, b0; + Colormap cmap; + XVisualInfo *visual; + XColor *colors = NULL; + XColor color; + unsigned long pixels[256]; + unsigned long junk[256]; + int i; + int d2; + unsigned int colors_needed; + int idx; + int best[256]; + + if (nr * ng * nb < xlib_rgb_min_colors) + return FALSE; + + if (image_info->cmap_alloced) { + cmap = image_info->cmap; + visual = image_info->x_visual_info; + } + else { + cmap = image_info->default_colormap; + visual = image_info->x_visual_info; + } + colors_needed = nr * ng * nb; + for (i = 0; i < 256; i++) + { + best[i] = 192; + pixels[i] = 256; + } + +#ifndef GAMMA + if (!xlib_rgb_install_cmap) { + /* go out and get the colors for this colormap. */ + colors = malloc(sizeof(XColor) * visual->colormap_size); + for (i=0; i < visual->colormap_size; i++){ + colors[i].pixel = i; + } + XQueryColors (image_info->display, + cmap, + colors, visual->colormap_size); + /* find color cube colors that are already present */ + for (i = 0; i < MIN (256, visual->colormap_size); i++) + { + r = colors[i].red >> 8; + g = colors[i].green >> 8; + b = colors[i].blue >> 8; + ri = (r * (nr - 1) + 128) >> 8; + gi = (g * (ng - 1) + 128) >> 8; + bi = (b * (nb - 1) + 128) >> 8; + r0 = ri * 255 / (nr - 1); + g0 = gi * 255 / (ng - 1); + b0 = bi * 255 / (nb - 1); + idx = ((ri * nr) + gi) * nb + bi; + d2 = (r - r0) * (r - r0) + (g - g0) * (g - g0) + (b - b0) * (b - b0); + if (d2 < best[idx]) { + if (pixels[idx] < 256) + XFreeColors(image_info->display, + cmap, + pixels + idx, + 1, 0); + else + colors_needed--; + color.pixel = colors[i].pixel; + color.red = colors[i].red; + color.green = colors[i].green; + color.blue = colors[i].blue; + color.flags = 0; + if (!XAllocColor(image_info->display, cmap, &color)) + return xlib_rgb_cmap_fail ("error allocating system color\n", + cmap, pixels); + pixels[idx] = color.pixel; /* which is almost certainly i */ + best[idx] = d2; + } + } + } + +#endif + + if (colors_needed) + { + if (!XAllocColorCells(image_info->display, cmap, 0, NULL, 0, junk, colors_needed)) + { + char tmp_str[80]; + + sprintf (tmp_str, + "%d %d %d colormap failed (in XAllocColorCells)\n", + nr, ng, nb); + return xlib_rgb_cmap_fail (tmp_str, cmap, pixels); + } + XFreeColors(image_info->display, cmap, junk, (int)colors_needed, 0); + } + + for (r = 0, i = 0; r < nr; r++) + for (g = 0; g < ng; g++) + for (b = 0; b < nb; b++, i++) + { + if (pixels[i] == 256) + { + color.red = r * 65535 / (nr - 1); + color.green = g * 65535 / (ng - 1); + color.blue = b * 65535 / (nb - 1); + +#ifdef GAMMA + color.red = 65535 * pow (color.red / 65535.0, 0.5); + color.green = 65535 * pow (color.green / 65535.0, 0.5); + color.blue = 65535 * pow (color.blue / 65535.0, 0.5); +#endif + + /* This should be a raw XAllocColor call */ + if (!XAllocColor(image_info->display, cmap, &color)) + { + char tmp_str[80]; + + sprintf (tmp_str, "%d %d %d colormap failed\n", + nr, ng, nb); + return xlib_rgb_cmap_fail (tmp_str, + cmap, pixels); + } + pixels[i] = color.pixel; + } +#ifdef VERBOSE + printf ("%d: %lx\n", i, pixels[i]); +#endif + } + + image_info->nred_shades = nr; + image_info->ngreen_shades = ng; + image_info->nblue_shades = nb; + xlib_rgb_make_colorcube (pixels, nr, ng, nb); + xlib_rgb_make_colorcube_d (pixels, nr, ng, nb); + if (colors) + free(colors); + return TRUE; +} + +/* Return TRUE on success. */ +static Bool +xlib_rgb_do_colormaps (void) +{ + static const int sizes[][3] = { + /* { 6, 7, 6 }, */ + { 6, 6, 6 }, + { 6, 6, 5 }, + { 6, 6, 4 }, + { 5, 5, 5 }, + { 5, 5, 4 }, + { 4, 4, 4 }, + { 4, 4, 3 }, + { 3, 3, 3 }, + { 2, 2, 2 } + }; + static const int n_sizes = sizeof(sizes) / (3 * sizeof(int)); + int i; + + for (i = 0; i < n_sizes; i++) + if (xlib_rgb_try_colormap (sizes[i][0], sizes[i][1], sizes[i][2])) + return TRUE; + return FALSE; +} + +/* Make a 2 x 2 x 2 colorcube */ +static void +xlib_rgb_colorcube_222 (void) +{ + int i; + XColor color; + Colormap cmap; + + if (image_info->cmap_alloced) + cmap = image_info->cmap; + else + cmap = image_info->default_colormap; + + colorcube_d = malloc(sizeof(unsigned char) * 512); + + for (i = 0; i < 8; i++) + { + color.red = ((i & 4) >> 2) * 65535; + color.green = ((i & 2) >> 1) * 65535; + color.blue = (i & 1) * 65535; + XAllocColor (image_info->display, cmap, &color); + colorcube_d[((i & 4) << 4) | ((i & 2) << 2) | (i & 1)] = color.pixel; + } +} + +/** + * xlib_rgb_set_verbose: + * @verbose: %True to be verbose + * + * Enables/disables debug spew. + **/ +void +xlib_rgb_set_verbose (Bool verbose) +{ + xlib_rgb_verbose = verbose; +} + +/** + * xlib_rgb_set_install: + * @install: %True to install a colormap + * + * Sets whether we install an RGB colormap. + **/ +void +xlib_rgb_set_install (Bool install) +{ + xlib_rgb_install_cmap = install; +} + +/** + * xlib_rgb_set_min_colors: + * @min_colors: minimum colors to use + * + * Sets the minimum number of colors in the color cube. + **/ +void +xlib_rgb_set_min_colors (int min_colors) +{ + xlib_rgb_min_colors = min_colors; +} + +/* Return a "score" based on the following criteria (in hex): + + x000 is the quality - 1 is 1bpp, 2 is 4bpp, + 4 is 8bpp, + 7 is 15bpp truecolor, 8 is 16bpp truecolor, + 9 is 24bpp truecolor. + 0x00 is the speed - 1 is the normal case, + 2 means faster than normal + 00x0 gets a point for being the system visual + 000x gets a point for being pseudocolor + + A caveat: in the 8bpp modes, being the system visual seems to be + quite important. Thus, all of the 8bpp modes should be ranked at + the same speed. +*/ + +static unsigned int +xlib_rgb_score_visual (XVisualInfo *visual) +{ + unsigned int quality, speed, pseudo, sys; + static const char* visual_names[] = + { + "static gray", + "grayscale", + "static color", + "pseudo color", + "true color", + "direct color", + }; + + + quality = 0; + speed = 1; + sys = 0; + if (visual->class == TrueColor || + visual->class == DirectColor) + { + if (visual->depth == 24) + { + quality = 9; + /* Should test for MSB visual here, and set speed if so. */ + } + else if (visual->depth == 16) + quality = 8; + else if (visual->depth == 15) + quality = 7; + else if (visual->depth == 8) + quality = 4; + } + else if (visual->class == PseudoColor || + visual->class == StaticColor) + { + if (visual->depth == 8) + quality = 4; + else if (visual->depth == 4) + quality = 2; + else if (visual->depth == 1) + quality = 1; + } + else if (visual->class == StaticGray +#ifdef ENABLE_GRAYSCALE + || visual->class == GrayScale +#endif + ) + { + if (visual->depth == 8) + quality = 4; + else if (visual->depth == 4) + quality = 2; + else if (visual->depth == 1) + quality = 1; + } + + if (quality == 0) + return 0; + + sys = (visual->visualid == image_info->default_visualid->visualid); + + pseudo = (visual->class == PseudoColor || visual->class == TrueColor); + + if (xlib_rgb_verbose) + printf ("Visual 0x%x, type = %s, depth = %d, %ld:%ld:%ld%s; score=%x\n", + (int)visual->visualid, + visual_names[visual->class], + visual->depth, + visual->red_mask, + visual->green_mask, + visual->blue_mask, + sys ? " (system)" : "", + (quality << 12) | (speed << 8) | (sys << 4) | pseudo); + + return (quality << 12) | (speed << 8) | (sys << 4) | pseudo; +} + +static void +xlib_rgb_choose_visual (void) +{ + XVisualInfo *visuals; + XVisualInfo *visual; + XVisualInfo *best_visual; + XVisualInfo *final_visual; + XVisualInfo template; + int num_visuals; + unsigned int score, best_score; + int cur_visual = 1; + int i; + + template.screen = image_info->screen_num; + visuals = XGetVisualInfo(image_info->display, VisualScreenMask, + &template, &num_visuals); + + best_visual = visuals; + best_score = xlib_rgb_score_visual (best_visual); + + for (i = cur_visual; i < num_visuals; i++) + { + visual = &visuals[i]; + score = xlib_rgb_score_visual (visual); + if (score > best_score) + { + best_score = score; + best_visual = visual; + } + } + /* make a copy of the visual so that we can free + the allocated visual list above. */ + final_visual = malloc(sizeof(XVisualInfo)); + memcpy(final_visual, best_visual, sizeof(XVisualInfo)); + image_info->x_visual_info = final_visual; + XFree(visuals); + /* set up the shift and the precision for the red, green and blue. + this only applies to cool visuals like true color and direct color. */ + if (image_info->x_visual_info->class == TrueColor || + image_info->x_visual_info->class == DirectColor) { + image_info->red_shift = xlib_get_shift_from_mask(image_info->x_visual_info->red_mask); + image_info->red_prec = xlib_get_prec_from_mask(image_info->x_visual_info->red_mask); + image_info->green_shift = xlib_get_shift_from_mask(image_info->x_visual_info->green_mask); + image_info->green_prec = xlib_get_prec_from_mask(image_info->x_visual_info->green_mask); + image_info->blue_shift = xlib_get_shift_from_mask(image_info->x_visual_info->blue_mask); + image_info->blue_prec = xlib_get_prec_from_mask(image_info->x_visual_info->blue_mask); + } +} + +static void +xlib_rgb_choose_visual_for_xprint (int aDepth) +{ + XVisualInfo *visuals; + XVisualInfo *visual; + XVisualInfo *best_visual; + XVisualInfo *final_visual; + XVisualInfo template; + int num_visuals; + int cur_visual = 1; + int i; + + XWindowAttributes win_att; + Status ret_stat; + Visual *root_visual; + + ret_stat = XGetWindowAttributes(image_info->display, + RootWindow(image_info->display, image_info->screen_num), + &win_att); + root_visual = win_att.visual; + template.screen = image_info->screen_num; + visuals = XGetVisualInfo(image_info->display, VisualScreenMask, + &template, &num_visuals); + + best_visual = visuals; + if (best_visual->visual != root_visual) { + for (i = cur_visual; i < num_visuals; i++) { + visual = &visuals[i]; + if (visual->visual == root_visual) { + best_visual = visual; + break; + } + } + } + /* make a copy of the visual so that we can free + the allocated visual list above. */ + final_visual = malloc(sizeof(XVisualInfo)); + memcpy(final_visual, best_visual, sizeof(XVisualInfo)); + image_info->x_visual_info = final_visual; + XFree(visuals); + /* set up the shift and the precision for the red, green and blue. + this only applies to cool visuals like true color and direct color. */ + if (image_info->x_visual_info->class == TrueColor || + image_info->x_visual_info->class == DirectColor) { + image_info->red_shift = xlib_get_shift_from_mask(image_info->x_visual_info->red_mask); + image_info->red_prec = xlib_get_prec_from_mask(image_info->x_visual_info->red_mask); + image_info->green_shift = xlib_get_shift_from_mask(image_info->x_visual_info->green_mask); + image_info->green_prec = xlib_get_prec_from_mask(image_info->x_visual_info->green_mask); + image_info->blue_shift = xlib_get_shift_from_mask(image_info->x_visual_info->blue_mask); + image_info->blue_prec = xlib_get_prec_from_mask(image_info->x_visual_info->blue_mask); + } +} + +static void xlib_rgb_select_conv (XImage *image, ByteOrder byte_order); + +static void +xlib_rgb_set_gray_cmap (Colormap cmap) +{ + int i; + XColor color; + int status; + unsigned long pixels[256]; + int r, g, b, gray; + + for (i = 0; i < 256; i++) + { + color.pixel = i; + color.red = i * 257; + color.green = i * 257; + color.blue = i * 257; + status = XAllocColor(image_info->display, cmap, &color); + pixels[i] = color.pixel; +#ifdef VERBOSE + printf ("allocating pixel %d, %x %x %x, result %d\n", + color.pixel, color.red, color.green, color.blue, status); +#endif + } + + /* Now, we make fake colorcubes - we ultimately just use the pseudocolor + methods. */ + + colorcube = malloc(sizeof(unsigned char) * 4096); + + for (i = 0; i < 4096; i++) + { + r = (i >> 4) & 0xf0; + r = r | r >> 4; + g = i & 0xf0; + g = g | g >> 4; + b = (i << 4 & 0xf0); + b = b | b >> 4; + gray = (g + ((r + b) >> 1)) >> 1; + colorcube[i] = pixels[gray]; + } +} + +/** + * xlib_rgb_init_with_depth: + * @display: X display to use. + * @screen: Screen to use. + * @prefDepth: Visual depth to use for color substitution tables. This must + * be one of the supported visual depths in the specified @display. + * + * Initializes the XlibRGB machinery with a particular depth you specify, + * instead of automatically picking the best depth in the display. This + * function or xlib_rgb_init() must be called before using any of the other + * functions in XlibRGB. + **/ +void +xlib_rgb_init_with_depth (Display *display, Screen *screen, int prefDepth) +{ + int i; + static const int byte_order[1] = { 1 }; + + static int initialized = 0; + + if (initialized) + { + return; + } + + initialized = 1; + +#if X_BYTE_ORDER == X_BIG_ENDIAN + if (((char *)byte_order)[0] == 1) { + printf ("xlib_rgb_init: compiled for big endian, but this is a little endian machine.\n\n"); + exit(1); + } +#else + if (((char *)byte_order)[0] != 1) { + printf ("xlib_rgb_init: compiled for little endian, but this is a big endian machine.\n\n"); + exit(1); + } +#endif + + if (image_info == NULL) + { + image_info = malloc(sizeof(XlibRgbInfo)); + memset(image_info, 0, sizeof(XlibRgbInfo)); + + image_info->display = display; + image_info->screen = screen; + image_info->screen_num = XScreenNumberOfScreen(screen); + image_info->x_visual_info = NULL; + image_info->cmap = 0; + image_info->default_visualid = DefaultVisual(display, image_info->screen_num); + image_info->default_colormap = DefaultColormap(display, image_info->screen_num); + + image_info->color_pixels = NULL; + image_info->gray_pixels = NULL; + image_info->reserved_pixels = NULL; + + image_info->nred_shades = 6; + image_info->ngreen_shades = 6; + image_info->nblue_shades = 4; + image_info->ngray_shades = 24; + image_info->nreserved = 0; + + image_info->bpp = 0; + image_info->cmap_alloced = FALSE; + image_info->gamma_val = 1.0; + + image_info->stage_buf = NULL; + + image_info->own_gc = 0; + + image_info->red_shift = 0; + image_info->red_prec = 0; + image_info->green_shift = 0; + image_info->green_prec = 0; + image_info->blue_shift = 0; + image_info->blue_prec = 0; + + if (prefDepth != -1) + xlib_rgb_choose_visual_for_xprint (prefDepth); + else + xlib_rgb_choose_visual (); + + if ((image_info->x_visual_info->class == PseudoColor || + image_info->x_visual_info->class == StaticColor) && + image_info->x_visual_info->depth < 8 && + image_info->x_visual_info->depth >= 3) + { + image_info->cmap = image_info->default_colormap; + xlib_rgb_colorcube_222 (); + } + else if (image_info->x_visual_info->class == PseudoColor) + { + if (xlib_rgb_install_cmap || + image_info->x_visual_info->visualid != image_info->default_visualid->visualid) + { + image_info->cmap = XCreateColormap(image_info->display, + RootWindow(image_info->display, image_info->screen_num), + image_info->x_visual_info->visual, + AllocNone); + image_info->cmap_alloced = TRUE; + } + if (!xlib_rgb_do_colormaps ()) + { + image_info->cmap = XCreateColormap(image_info->display, + RootWindow(image_info->display, image_info->screen_num), + image_info->x_visual_info->visual, + AllocNone); + image_info->cmap_alloced = TRUE; + xlib_rgb_do_colormaps (); + } + if (xlib_rgb_verbose) + printf ("color cube: %d x %d x %d\n", + image_info->nred_shades, + image_info->ngreen_shades, + image_info->nblue_shades); + + if (!image_info->cmap_alloced) + image_info->cmap = image_info->default_colormap; + } +#ifdef ENABLE_GRAYSCALE + else if (image_info->x_visual_info->class == GrayScale) + { + image_info->cmap = XCreateColormap(image_info->display, + RootWindow(image_info->display, image_info->screen_num), + image_info->x_visual_info->visual, + AllocNone); + xlib_rgb_set_gray_cmap (image_info->cmap); + image_info->cmap_alloced = TRUE; + } +#endif + else + { + /* Always install colormap in direct color. */ + if (image_info->x_visual_info->class != DirectColor && + image_info->x_visual_info->visualid == image_info->default_visualid->visualid) + image_info->cmap = image_info->default_colormap; + else + { + image_info->cmap = XCreateColormap(image_info->display, + RootWindow(image_info->display, image_info->screen_num), + image_info->x_visual_info->visual, + AllocNone); + image_info->cmap_alloced = TRUE; + } + } + + image_info->bitmap = (image_info->x_visual_info->depth == 1); + + for (i = 0; i < N_IMAGES; i++) { + if (image_info->bitmap) { + /* Use malloc() instead of g_malloc since X will free() this mem */ + static_image[i] = XCreateImage(image_info->display, + image_info->x_visual_info->visual, + 1, + XYBitmap, + 0, 0, IMAGE_WIDTH, IMAGE_HEIGHT, + 8, + 0); + static_image[i]->data = malloc(IMAGE_WIDTH * IMAGE_HEIGHT >> 3); + static_image[i]->bitmap_bit_order = MSBFirst; + static_image[i]->byte_order = MSBFirst; + } + else { + static_image[i] = XCreateImage(image_info->display, + image_info->x_visual_info->visual, + (unsigned int)image_info->x_visual_info->depth, + ZPixmap, + 0, 0, + IMAGE_WIDTH, + IMAGE_HEIGHT, + 32, 0); + /* remove this when we are using shared memory.. */ + static_image[i]->data = malloc((size_t)IMAGE_WIDTH * IMAGE_HEIGHT * image_info->x_visual_info->depth); + static_image[i]->bitmap_bit_order = MSBFirst; + static_image[i]->byte_order = MSBFirst; + } + } + /* ok, so apparently, image_info->bpp is actually + BYTES per pixel. What fun! */ + switch (static_image[0]->bits_per_pixel) { + case 1: + case 8: + image_info->bpp = 1; + break; + case 16: + image_info->bpp = 2; + break; + case 24: + image_info->bpp = 3; + break; + case 32: + image_info->bpp = 4; + break; + } + xlib_rgb_select_conv (static_image[0], MSB_FIRST); + } +} + + + +#if X_BYTE_ORDER == X_LITTLE_ENDIAN +#define HAIRY_CONVERT_8 +#endif + +#ifdef HAIRY_CONVERT_8 +static void +xlib_rgb_convert_8 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + if (((unsigned long)obuf | (unsigned long) bp2) & 3) + { + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + obptr[0] = colorcube[((r & 0xf0) << 4) | + (g & 0xf0) | + (b >> 4)]; + obptr++; + } + } + else + { + for (x = 0; x < width - 3; x += 4) + { + unsigned int r1b0g0r0; + unsigned int g2r2b1g1; + unsigned int b3g3r3b2; + + r1b0g0r0 = ((unsigned int *)bp2)[0]; + g2r2b1g1 = ((unsigned int *)bp2)[1]; + b3g3r3b2 = ((unsigned int *)bp2)[2]; + ((unsigned int *)obptr)[0] = + colorcube[((r1b0g0r0 & 0xf0) << 4) | + ((r1b0g0r0 & 0xf000) >> 8) | + ((r1b0g0r0 & 0xf00000) >> 20)] | + (colorcube[((r1b0g0r0 & 0xf0000000) >> 20) | + (g2r2b1g1 & 0xf0) | + ((g2r2b1g1 & 0xf000) >> 12)] << 8) | + (colorcube[((g2r2b1g1 & 0xf00000) >> 12) | + ((g2r2b1g1 & 0xf0000000) >> 24) | + ((b3g3r3b2 & 0xf0) >> 4)] << 16) | + (colorcube[((b3g3r3b2 & 0xf000) >> 4) | + ((b3g3r3b2 & 0xf00000) >> 16) | + (b3g3r3b2 >> 28)] << 24); + bp2 += 12; + obptr += 4; + } + for (; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + obptr[0] = colorcube[((r & 0xf0) << 4) | + (g & 0xf0) | + (b >> 4)]; + obptr++; + } + } + bptr += rowstride; + obuf += bpl; + } +} +#else +static void +xlib_rgb_convert_8 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + obptr[0] = colorcube[((r & 0xf0) << 4) | + (g & 0xf0) | + (b >> 4)]; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} +#endif + +#if 1 + +/* This dither table was generated by Raph Levien using patented + technology (US Patent 5,276,535). The dither table itself is in the + public domain. */ + +#define DM_WIDTH 128 +#define DM_WIDTH_SHIFT 7 +#define DM_HEIGHT 128 +static const unsigned char DM[128][128] = +{ + { 0, 41, 23, 5, 17, 39, 7, 15, 62, 23, 40, 51, 31, 47, 9, 32, 52, 27, 57, 25, 6, 61, 27, 52, 37, 7, 40, 63, 18, 36, 10, 42, 25, 62, 45, 34, 20, 42, 37, 14, 35, 29, 50, 10, 61, 2, 40, 8, 37, 12, 58, 22, 5, 41, 10, 39, 0, 60, 11, 46, 2, 55, 38, 17, 36, 59, 13, 54, 37, 56, 8, 29, 16, 13, 63, 22, 41, 55, 7, 20, 49, 14, 23, 55, 37, 23, 19, 36, 15, 49, 23, 63, 30, 14, 38, 27, 53, 13, 22, 41, 19, 31, 7, 19, 50, 30, 49, 16, 3, 32, 56, 40, 29, 34, 8, 48, 19, 45, 4, 51, 12, 46, 35, 49, 16, 42, 12, 62 }, + { 30, 57, 36, 54, 47, 34, 52, 27, 43, 4, 28, 7, 17, 36, 62, 13, 44, 7, 18, 48, 33, 21, 44, 14, 30, 47, 12, 33, 5, 55, 31, 58, 13, 30, 4, 17, 52, 10, 60, 26, 46, 0, 39, 27, 42, 22, 47, 25, 60, 32, 9, 38, 48, 17, 59, 30, 49, 18, 34, 25, 51, 19, 5, 48, 21, 8, 28, 46, 1, 32, 41, 19, 54, 47, 37, 18, 28, 11, 44, 30, 39, 56, 2, 33, 8, 42, 61, 28, 58, 8, 46, 9, 41, 4, 58, 7, 21, 48, 59, 10, 52, 14, 42, 57, 12, 25, 7, 53, 42, 24, 11, 50, 17, 59, 42, 2, 36, 60, 32, 17, 63, 29, 21, 7, 59, 32, 24, 39 }, + { 22, 8, 16, 32, 3, 25, 13, 57, 18, 45, 58, 39, 55, 20, 5, 42, 23, 34, 63, 1, 51, 10, 58, 4, 60, 23, 53, 27, 44, 21, 3, 48, 8, 50, 43, 54, 27, 32, 5, 55, 21, 58, 12, 53, 6, 36, 14, 50, 17, 29, 53, 15, 24, 52, 7, 36, 13, 42, 4, 53, 9, 35, 61, 26, 56, 32, 49, 15, 62, 23, 6, 60, 2, 31, 4, 48, 58, 38, 15, 61, 5, 25, 47, 28, 50, 15, 7, 40, 3, 32, 33, 52, 25, 50, 35, 42, 61, 3, 28, 36, 23, 63, 4, 33, 46, 62, 36, 23, 60, 6, 54, 28, 4, 37, 23, 55, 25, 8, 42, 54, 14, 6, 56, 38, 19, 52, 4, 46 }, + { 48, 53, 43, 12, 45, 63, 30, 37, 9, 34, 21, 1, 25, 47, 29, 58, 3, 54, 15, 39, 29, 17, 38, 35, 20, 43, 1, 49, 15, 59, 29, 39, 22, 35, 16, 23, 1, 47, 39, 18, 8, 44, 25, 31, 57, 19, 63, 4, 45, 3, 42, 61, 1, 31, 45, 20, 57, 29, 62, 21, 32, 41, 14, 44, 3, 39, 5, 34, 10, 43, 51, 35, 23, 52, 40, 10, 21, 1, 53, 18, 51, 43, 12, 62, 18, 54, 26, 51, 20, 57, 14, 1, 62, 16, 11, 18, 32, 39, 17, 44, 1, 48, 26, 37, 18, 2, 51, 14, 28, 45, 35, 18, 57, 13, 47, 11, 51, 20, 2, 39, 31, 47, 25, 1, 50, 11, 60, 7 }, + { 18, 28, 1, 56, 21, 10, 51, 2, 46, 54, 14, 61, 11, 50, 13, 38, 19, 31, 45, 9, 55, 24, 47, 5, 54, 9, 62, 11, 35, 8, 51, 14, 57, 6, 63, 40, 58, 14, 51, 28, 62, 34, 15, 48, 1, 41, 30, 35, 55, 21, 34, 11, 49, 37, 8, 52, 4, 23, 15, 43, 1, 58, 11, 23, 53, 16, 55, 26, 58, 18, 27, 12, 45, 14, 25, 63, 42, 33, 27, 35, 9, 31, 21, 38, 1, 44, 34, 12, 48, 38, 21, 44, 29, 47, 26, 53, 1, 46, 54, 8, 59, 29, 11, 55, 22, 41, 33, 20, 39, 1, 48, 9, 44, 32, 5, 62, 29, 44, 57, 23, 10, 58, 34, 43, 15, 37, 26, 33 }, + { 51, 38, 59, 24, 35, 42, 19, 60, 5, 32, 41, 26, 43, 33, 7, 53, 48, 11, 59, 23, 42, 2, 61, 30, 16, 40, 32, 24, 56, 41, 19, 33, 37, 26, 47, 9, 31, 22, 2, 45, 9, 54, 4, 37, 21, 52, 11, 23, 7, 57, 16, 25, 55, 18, 63, 27, 46, 39, 56, 10, 50, 37, 29, 47, 19, 63, 24, 9, 46, 2, 39, 60, 9, 57, 30, 7, 49, 11, 59, 3, 45, 57, 5, 60, 29, 22, 5, 60, 30, 9, 59, 18, 40, 6, 57, 36, 30, 12, 24, 34, 15, 40, 52, 6, 49, 9, 58, 4, 63, 12, 26, 61, 22, 53, 38, 16, 35, 14, 28, 50, 42, 17, 5, 28, 62, 20, 54, 12 }, + { 26, 6, 31, 15, 49, 6, 38, 27, 22, 49, 16, 56, 2, 62, 30, 21, 0, 36, 28, 6, 49, 32, 13, 52, 26, 50, 19, 46, 3, 26, 62, 0, 53, 12, 29, 3, 53, 41, 60, 24, 38, 13, 58, 16, 43, 9, 59, 39, 46, 28, 44, 40, 2, 33, 13, 41, 16, 6, 47, 31, 26, 17, 57, 6, 38, 0, 42, 36, 29, 52, 20, 31, 48, 0, 34, 56, 20, 36, 23, 54, 14, 41, 24, 37, 10, 55, 46, 25, 16, 45, 36, 4, 55, 23, 15, 8, 50, 62, 5, 56, 44, 20, 13, 28, 59, 31, 24, 47, 31, 52, 37, 17, 40, 0, 26, 49, 3, 60, 7, 33, 0, 61, 53, 40, 8, 45, 2, 41 }, + { 16, 63, 43, 4, 61, 24, 56, 13, 53, 8, 36, 12, 24, 41, 16, 46, 60, 26, 52, 39, 14, 57, 21, 37, 0, 45, 7, 59, 38, 17, 43, 10, 45, 20, 61, 43, 19, 11, 33, 17, 50, 32, 23, 61, 28, 49, 26, 0, 18, 51, 5, 60, 22, 58, 29, 0, 59, 34, 19, 62, 3, 52, 7, 44, 30, 59, 13, 50, 15, 62, 7, 17, 38, 22, 44, 15, 40, 4, 47, 28, 33, 17, 49, 16, 51, 40, 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60, 7, 54, 3, 58, 8, 34, 14, 5, 59, 30, 18, 44, 8, 22, 48, 62, 3, 26, 55, 38, 23, 16, 39, 1, 62, 24, 49, 9, 53, 19, 46, 7, 19, 60, 31, 58, 2, 34, 53, 7, 59, 2, 62, 42, 46, 19, 36, 11, 44, 4, 38, 28, 1, 43, 32, 51, 12, 29, 56, 22, 52, 2, 62, 49, 22, 60, 14, 35, 63, 5, 25, 57, 14, 53, 4, 46, 18, 31, 42, 22, 47, 20, 58, 31, 16, 43, 23, 54, 30, 42, 52, 57, 29, 49, 30, 13, 45, 48, 16, 55, 6, 63, 1, 44, 14, 58, 19, 47, 15, 24, 51, 34, 6, 55, 5, 63, 20, 41, 21, 9 }, + { 30, 62, 18, 55, 5, 23, 39, 29, 49, 30, 15, 36, 28, 46, 60, 25, 39, 46, 4, 32, 61, 40, 15, 30, 36, 45, 14, 2, 49, 33, 57, 45, 18, 32, 3, 45, 30, 2, 35, 52, 40, 27, 13, 21, 38, 63, 20, 28, 37, 23, 16, 10, 13, 55, 2, 62, 21, 32, 60, 17, 58, 23, 5, 40, 16, 48, 7, 45, 10, 26, 43, 19, 6, 31, 52, 21, 39, 16, 48, 9, 37, 28, 36, 55, 7, 48, 3, 59, 15, 45, 25, 1, 53, 13, 47, 7, 62, 15, 4, 25, 12, 41, 18, 60, 38, 11, 34, 19, 39, 31, 29, 56, 23, 42, 3, 27, 60, 41, 8, 16, 61, 29, 43, 9, 32, 2, 60, 34 }, + { 3, 38, 13, 37, 52, 44, 2, 19, 12, 42, 63, 19, 40, 1, 20, 50, 12, 55, 15, 56, 27, 1, 54, 11, 57, 18, 32, 63, 44, 4, 29, 13, 37, 61, 35, 16, 42, 57, 12, 22, 6, 55, 43, 10, 50, 5, 44, 11, 48, 52, 34, 58, 28, 41, 38, 30, 7, 52, 11, 49, 30, 14, 45, 27, 59, 34, 21, 38, 32, 58, 11, 36, 56, 42, 9, 41, 3, 54, 31, 42, 0, 60, 16, 11, 39, 24, 52, 33, 6, 36, 10, 40, 32, 60, 26, 20, 39, 28, 47, 34, 63, 8, 54, 3, 24, 56, 0, 51, 13, 47, 16, 40, 7, 35, 52, 11, 36, 4, 57, 30, 39, 13, 18, 50, 58, 28, 12, 48 }, + { 57, 24, 49, 21, 10, 31, 61, 36, 56, 0, 22, 53, 11, 56, 32, 7, 36, 27, 41, 9, 46, 19, 34, 42, 25, 7, 50, 9, 28, 21, 54, 8, 50, 7, 27, 59, 10, 25, 48, 62, 37, 0, 33, 58, 25, 18, 32, 61, 0, 15, 45, 5, 50, 3, 23, 55, 47, 17, 40, 6, 60, 34, 53, 8, 41, 0, 61, 13, 54, 4, 46, 28, 0, 17, 48, 27, 58, 13, 23, 61, 33, 21, 50, 30, 62, 8, 14, 29, 56, 27, 61, 49, 17, 2, 44, 11, 51, 0, 59, 17, 40, 20, 32, 47, 36, 21, 42, 28, 60, 4, 54, 10, 59, 17, 30, 62, 21, 43, 26, 48, 0, 56, 36, 25, 8, 44, 39, 17 }, + { 10, 42, 4, 59, 27, 47, 8, 23, 51, 32, 45, 6, 37, 26, 48, 43, 62, 0, 21, 53, 38, 12, 51, 5, 60, 47, 24, 37, 59, 15, 35, 47, 22, 55, 0, 50, 21, 40, 6, 29, 15, 52, 24, 8, 41, 55, 13, 29, 40, 56, 24, 31, 19, 33, 61, 15, 0, 35, 24, 42, 21, 2, 19, 57, 24, 15, 30, 50, 20, 25, 40, 16, 57, 34, 61, 8, 29, 45, 6, 49, 11, 47, 2, 44, 19, 57, 38, 50, 12, 42, 21, 4, 35, 52, 28, 56, 23, 36, 13, 45, 4, 52, 27, 14, 6, 62, 9, 45, 21, 37, 25, 46, 33, 49, 0, 44, 7, 53, 13, 19, 53, 31, 3, 47, 15, 56, 22, 51 }, + { 35, 28, 53, 32, 1, 16, 54, 40, 9, 17, 25, 58, 14, 59, 3, 22, 16, 51, 31, 5, 23, 58, 28, 17, 35, 20, 0, 42, 11, 52, 3, 31, 41, 17, 43, 13, 32, 54, 18, 60, 32, 45, 17, 49, 2, 36, 51, 22, 7, 36, 9, 63, 48, 12, 46, 26, 43, 28, 63, 13, 48, 37, 51, 33, 5, 47, 55, 9, 42, 63, 7, 51, 24, 12, 37, 19, 55, 34, 18, 38, 15, 28, 54, 34, 5, 43, 22, 0, 48, 14, 54, 24, 58, 9, 38, 5, 32, 55, 21, 30, 49, 9, 59, 43, 30, 51, 35, 26, 7, 53, 2, 22, 14, 27, 57, 18, 38, 24, 33, 45, 10, 41, 20, 60, 37, 5, 32, 0 }, + { 63, 19, 15, 40, 62, 35, 14, 28, 46, 61, 4, 49, 35, 10, 29, 54, 33, 8, 45, 62, 37, 1, 43, 55, 10, 52, 61, 30, 19, 40, 25, 62, 11, 38, 27, 58, 36, 3, 46, 8, 39, 4, 62, 28, 47, 20, 4, 54, 47, 27, 43, 1, 21, 38, 8, 58, 10, 54, 4, 56, 9, 26, 12, 39, 60, 27, 18, 37, 1, 31, 35, 5, 45, 50, 2, 43, 26, 1, 59, 23, 56, 40, 7, 26, 58, 17, 32, 63, 25, 39, 7, 31, 45, 19, 63, 15, 48, 8, 37, 61, 16, 34, 1, 56, 18, 3, 15, 58, 49, 32, 63, 41, 55, 5, 40, 22, 50, 6, 59, 2, 63, 23, 52, 11, 26, 61, 44, 23 }, + { 11, 56, 46, 6, 22, 43, 58, 3, 34, 21, 38, 30, 18, 44, 52, 13, 41, 57, 17, 28, 14, 49, 25, 7, 33, 39, 26, 6, 56, 48, 1, 20, 56, 5, 46, 9, 19, 51, 30, 25, 56, 21, 35, 14, 57, 42, 16, 33, 10, 57, 17, 59, 41, 25, 53, 37, 20, 40, 30, 18, 31, 62, 44, 22, 3, 44, 11, 48, 23, 53, 18, 60, 29, 22, 62, 15, 53, 47, 10, 41, 3, 19, 52, 36, 13, 46, 10, 35, 3, 61, 41, 16, 1, 50, 26, 42, 18, 46, 2, 25, 54, 20, 39, 23, 47, 31, 41, 12, 38, 17, 8, 19, 31, 48, 12, 61, 9, 54, 29, 35, 15, 38, 6, 43, 34, 14, 7, 47 }, + { 39, 2, 33, 26, 53, 8, 18, 50, 41, 12, 53, 1, 63, 24, 19, 39, 2, 24, 47, 10, 60, 38, 19, 63, 48, 4, 15, 45, 32, 14, 60, 36, 29, 53, 23, 63, 34, 12, 61, 1, 43, 11, 53, 30, 1, 26, 60, 45, 23, 39, 3, 29, 12, 50, 4, 16, 51, 3, 45, 36, 50, 1, 16, 54, 35, 14, 57, 30, 58, 9, 46, 14, 41, 10, 32, 38, 4, 30, 21, 51, 32, 63, 25, 1, 60, 27, 53, 18, 51, 22, 28, 55, 34, 12, 40, 3, 60, 29, 57, 41, 6, 44, 11, 53, 8, 61, 24, 57, 1, 28, 44, 59, 36, 3, 34, 25, 41, 31, 16, 44, 22, 47, 28, 58, 1, 49, 54, 29 }, + { 58, 25, 50, 13, 38, 30, 60, 24, 6, 57, 27, 42, 9, 45, 6, 61, 30, 50, 4, 34, 29, 3, 46, 13, 22, 42, 58, 28, 9, 39, 23, 44, 7, 15, 44, 2, 40, 15, 47, 41, 23, 37, 7, 59, 38, 11, 34, 6, 62, 14, 52, 35, 55, 19, 32, 61, 33, 24, 57, 6, 22, 59, 29, 7, 49, 25, 40, 3, 17, 39, 27, 52, 0, 55, 16, 57, 24, 61, 36, 6, 29, 12, 48, 39, 20, 44, 6, 40, 33, 5, 48, 10, 57, 36, 22, 51, 33, 9, 24, 12, 62, 29, 50, 35, 14, 43, 5, 33, 47, 52, 13, 23, 10, 51, 56, 16, 46, 1, 49, 4, 61, 9, 52, 18, 31, 21, 36, 17 }, + { 19, 42, 9, 48, 2, 44, 11, 37, 48, 20, 33, 16, 55, 35, 49, 15, 37, 20, 59, 16, 53, 22, 56, 31, 50, 11, 34, 54, 16, 51, 4, 49, 33, 53, 21, 28, 56, 24, 31, 9, 52, 16, 48, 24, 44, 13, 51, 20, 31, 49, 18, 6, 34, 2, 44, 14, 47, 8, 15, 43, 13, 41, 33, 52, 20, 61, 7, 51, 34, 62, 4, 20, 36, 33, 43, 8, 46, 13, 53, 17, 45, 42, 9, 31, 52, 11, 30, 56, 13, 59, 17, 44, 27, 6, 62, 11, 43, 17, 49, 38, 26, 2, 16, 27, 58, 21, 54, 18, 26, 5, 35, 61, 43, 27, 7, 39, 14, 58, 37, 55, 20, 33, 13, 40, 62, 10, 55, 5 }, + { 51, 14, 61, 29, 59, 20, 55, 31, 0, 49, 11, 60, 3, 26, 22, 56, 0, 40, 12, 43, 41, 8, 36, 0, 17, 57, 24, 2, 46, 26, 61, 18, 0, 38, 12, 59, 6, 49, 3, 57, 19, 63, 5, 33, 18, 54, 28, 56, 0, 43, 26, 46, 63, 27, 56, 22, 27, 54, 38, 28, 63, 24, 10, 45, 0, 31, 42, 21, 12, 25, 44, 49, 59, 6, 26, 50, 3, 34, 27, 59, 0, 35, 62, 16, 4, 58, 47, 0, 43, 24, 37, 2, 54, 20, 46, 31, 0, 56, 34, 5, 55, 45, 60, 37, 0, 40, 10, 38, 63, 46, 15, 20, 0, 53, 21, 62, 30, 11, 24, 27, 40, 0, 57, 26, 3, 45, 27, 35 }, +}; + +#else +#define DM_WIDTH 8 +#define DM_WIDTH_SHIFT 3 +#define DM_HEIGHT 8 +static const unsigned char DM[8][8] = +{ + { 0, 32, 8, 40, 2, 34, 10, 42 }, + { 48, 16, 56, 24, 50, 18, 58, 26 }, + { 12, 44, 4, 36, 14, 46, 6, 38 }, + { 60, 28, 52, 20, 62, 30, 54, 22 }, + { 3, 35, 11, 43, 1, 33, 9, 41 }, + { 51, 19, 59, 27, 49, 17, 57, 25 }, + { 15, 47, 7, 39, 13, 45, 5, 37 }, + { 63, 31, 55, 23, 61, 29, 53, 21 } +}; +#endif + +static unsigned int *DM_565 = NULL; + +static void +xlib_rgb_preprocess_dm_565 (void) +{ + int i; + unsigned int dith; + + if (DM_565 == NULL) + { + DM_565 = malloc(sizeof(unsigned int) * DM_WIDTH * DM_HEIGHT); + for (i = 0; i < DM_WIDTH * DM_HEIGHT; i++) + { + dith = DM[0][i] >> 3; + DM_565[i] = (dith << 20) | dith | (((7 - dith) >> 1) << 10); +#ifdef VERBOSE + printf ("%i %x %x\n", i, dith, DM_565[i]); +#endif + } + } +} + +static void +xlib_rgb_convert_8_d666 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + const unsigned char *dmp; + int dith; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7; + r = ((r * 5) + dith) >> 8; + g = ((g * 5) + (262 - dith)) >> 8; + b = ((b * 5) + dith) >> 8; + obptr[0] = colorcube_d[(r << 6) | (g << 3) | b]; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_8_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + const unsigned char *dmp; + int dith; + int rs, gs, bs; + + bptr = buf; + bpl = image->bytes_per_line; + rs = image_info->nred_shades - 1; + gs = image_info->ngreen_shades - 1; + bs = image_info->nblue_shades - 1; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 7; + r = ((r * rs) + dith) >> 8; + g = ((g * gs) + (262 - dith)) >> 8; + b = ((b * bs) + dith) >> 8; + obptr[0] = colorcube_d[(r << 6) | (g << 3) | b]; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_8_indexed (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + unsigned char c; + unsigned char *lut; + + lut = cmap->lut; + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x++) + { + c = *bp2++; + obptr[0] = lut[c]; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_gray8 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + obptr[0] = (g + ((b + r) >> 1)) >> 1; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_gray8_gray (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int y; + int bpl; + unsigned char *obuf; + unsigned char *bptr; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + memcpy (obuf, bptr, (unsigned int)width); + bptr += rowstride; + obuf += bpl; + } +} + +#if X_BYTE_ORDER == X_LITTLE_ENDIAN +#define HAIRY_CONVERT_565 +#endif + +#ifdef HAIRY_CONVERT_565 +/* Render a 24-bit RGB image in buf into the GdkImage, without dithering. + This assumes native byte ordering - what should really be done is to + check whether static_image->byte_order is consistent with the _ENDIAN + config flag, and if not, use a different function. + + This one is even faster than the one below - its inner loop loads 3 + words (i.e. 4 24-bit pixels), does a lot of shifting and masking, + then writes 2 words. */ +static void +xlib_rgb_convert_565 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + unsigned char r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + if (((unsigned long)obuf | (unsigned long) bp2) & 3) + { + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + ((unsigned short *)obptr)[0] = ((r & 0xf8) << 8) | + ((g & 0xfc) << 3) | + (b >> 3); + obptr += 2; + } + } + else + { + for (x = 0; x < width - 3; x += 4) + { + unsigned int r1b0g0r0; + unsigned int g2r2b1g1; + unsigned int b3g3r3b2; + + r1b0g0r0 = ((unsigned int *)bp2)[0]; + g2r2b1g1 = ((unsigned int *)bp2)[1]; + b3g3r3b2 = ((unsigned int *)bp2)[2]; + ((unsigned int *)obptr)[0] = + ((r1b0g0r0 & 0xf8) << 8) | + ((r1b0g0r0 & 0xfc00) >> 5) | + ((r1b0g0r0 & 0xf80000) >> 19) | + (r1b0g0r0 & 0xf8000000) | + ((g2r2b1g1 & 0xfc) << 19) | + ((g2r2b1g1 & 0xf800) << 5); + ((unsigned int *)obptr)[1] = + ((g2r2b1g1 & 0xf80000) >> 8) | + ((g2r2b1g1 & 0xfc000000) >> 21) | + ((b3g3r3b2 & 0xf8) >> 3) | + ((b3g3r3b2 & 0xf800) << 16) | + ((b3g3r3b2 & 0xfc0000) << 3) | + ((b3g3r3b2 & 0xf8000000) >> 11); + bp2 += 12; + obptr += 8; + } + for (; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + ((unsigned short *)obptr)[0] = ((r & 0xf8) << 8) | + ((g & 0xfc) << 3) | + (b >> 3); + obptr += 2; + } + } + bptr += rowstride; + obuf += bpl; + } +} +#else +/* Render a 24-bit RGB image in buf into the GdkImage, without dithering. + This assumes native byte ordering - what should really be done is to + check whether static_image->byte_order is consistent with the _ENDIAN + config flag, and if not, use a different function. + + This routine is faster than the one included with Gtk 1.0 for a number + of reasons: + + 1. Shifting instead of lookup tables (less memory traffic). + + 2. Much less register pressure, especially because shifts are + in the code. + + 3. A memcpy is avoided (i.e. the transfer function). + + 4. On big-endian architectures, byte swapping is avoided. + + That said, it wouldn't be hard to make it even faster - just make an + inner loop that reads 3 words (i.e. 4 24-bit pixels), does a lot of + shifting and masking, then writes 2 words. +*/ +static void +xlib_rgb_convert_565 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + unsigned char r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + ((unsigned short *)obuf)[x] = ((r & 0xf8) << 8) | + ((g & 0xfc) << 3) | + (b >> 3); + } + bptr += rowstride; + obuf += bpl; + } +} +#endif + +#ifdef HAIRY_CONVERT_565 +static void +xlib_rgb_convert_565_gray (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + unsigned char g; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + if (((unsigned long)obuf | (unsigned long) bp2) & 3) + { + for (x = 0; x < width; x++) + { + g = *bp2++; + ((unsigned short *)obptr)[0] = ((g & 0xf8) << 8) | + ((g & 0xfc) << 3) | + (g >> 3); + obptr += 2; + } + } + else + { + for (x = 0; x < width - 3; x += 4) + { + unsigned int g3g2g1g0; + + g3g2g1g0 = ((unsigned int *)bp2)[0]; + ((unsigned int *)obptr)[0] = + ((g3g2g1g0 & 0xf8) << 8) | + ((g3g2g1g0 & 0xfc) << 3) | + ((g3g2g1g0 & 0xf8) >> 3) | + (g3g2g1g0 & 0xf800) << 16 | + ((g3g2g1g0 & 0xfc00) << 11) | + ((g3g2g1g0 & 0xf800) << 5); + ((unsigned int *)obptr)[1] = + ((g3g2g1g0 & 0xf80000) >> 8) | + ((g3g2g1g0 & 0xfc0000) >> 13) | + ((g3g2g1g0 & 0xf80000) >> 19) | + (g3g2g1g0 & 0xf8000000) | + ((g3g2g1g0 & 0xfc000000) >> 5) | + ((g3g2g1g0 & 0xf8000000) >> 11); + bp2 += 4; + obptr += 8; + } + for (; x < width; x++) + { + g = *bp2++; + ((unsigned short *)obptr)[0] = ((g & 0xf8) << 8) | + ((g & 0xfc) << 3) | + (g >> 3); + obptr += 2; + } + } + bptr += rowstride; + obuf += bpl; + } +} +#else +static void +xlib_rgb_convert_565_gray (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + unsigned char g; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + g = *bp2++; + ((unsigned short *)obuf)[x] = ((g & 0xf8) << 8) | + ((g & 0xfc) << 3) | + (g >> 3); + } + bptr += rowstride; + obuf += bpl; + } +} +#endif + +static void +xlib_rgb_convert_565_br (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + unsigned char r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + /* final word is: + g4 g3 g2 b7 b6 b5 b4 b3 r7 r6 r5 r4 r3 g7 g6 g5 + */ + ((unsigned short *)obuf)[x] = (r & 0xf8) | + ((g & 0xe0) >> 5) | + ((g & 0x1c) << 11) | + ((b & 0xf8) << 5); + } + bptr += rowstride; + obuf += bpl; + } +} + +/* Thanks to Ray Lehtiniemi for a patch that resulted in a ~25% speedup + in this mode. */ +#ifdef HAIRY_CONVERT_565 +static void +xlib_rgb_convert_565_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + /* Now this is what I'd call some highly tuned code! */ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + + width += x_align; + height += y_align; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = y_align; y < height; y++) + { + unsigned int *dmp = DM_565 + ((y & (DM_HEIGHT - 1)) << DM_WIDTH_SHIFT); + bp2 = bptr; + obptr = obuf; + if (((unsigned long)obuf | (unsigned long) bp2) & 3) + { + for (x = x_align; x < width; x++) + { + int rgb = *bp2++ << 20; + rgb += *bp2++ << 10; + rgb += *bp2++; + rgb += dmp[x & (DM_WIDTH - 1)]; + rgb += 0x10040100 + - ((rgb & 0x1e0001e0) >> 5) + - ((rgb & 0x00070000) >> 6); + + ((unsigned short *)obptr)[0] = + ((rgb & 0x0f800000) >> 12) | + ((rgb & 0x0003f000) >> 7) | + ((rgb & 0x000000f8) >> 3); + obptr += 2; + } + } + else + { + for (x = x_align; x < width - 3; x += 4) + { + unsigned int r1b0g0r0; + unsigned int g2r2b1g1; + unsigned int b3g3r3b2; + unsigned int rgb02, rgb13; + + r1b0g0r0 = ((unsigned int *)bp2)[0]; + g2r2b1g1 = ((unsigned int *)bp2)[1]; + b3g3r3b2 = ((unsigned int *)bp2)[2]; + rgb02 = + ((r1b0g0r0 & 0xff) << 20) + + ((r1b0g0r0 & 0xff00) << 2) + + ((r1b0g0r0 & 0xff0000) >> 16) + + dmp[x & (DM_WIDTH - 1)]; + rgb02 += 0x10040100 + - ((rgb02 & 0x1e0001e0) >> 5) + - ((rgb02 & 0x00070000) >> 6); + rgb13 = + ((r1b0g0r0 & 0xff000000) >> 4) + + ((g2r2b1g1 & 0xff) << 10) + + ((g2r2b1g1 & 0xff00) >> 8) + + dmp[(x + 1) & (DM_WIDTH - 1)]; + rgb13 += 0x10040100 + - ((rgb13 & 0x1e0001e0) >> 5) + - ((rgb13 & 0x00070000) >> 6); + ((unsigned int *)obptr)[0] = + ((rgb02 & 0x0f800000) >> 12) | + ((rgb02 & 0x0003f000) >> 7) | + ((rgb02 & 0x000000f8) >> 3) | + ((rgb13 & 0x0f800000) << 4) | + ((rgb13 & 0x0003f000) << 9) | + ((rgb13 & 0x000000f8) << 13); + rgb02 = + ((g2r2b1g1 & 0xff0000) << 4) + + ((g2r2b1g1 & 0xff000000) >> 14) + + (b3g3r3b2 & 0xff) + + dmp[(x + 2) & (DM_WIDTH - 1)]; + rgb02 += 0x10040100 + - ((rgb02 & 0x1e0001e0) >> 5) + - ((rgb02 & 0x00070000) >> 6); + rgb13 = + ((b3g3r3b2 & 0xff00) << 12) + + ((b3g3r3b2 & 0xff0000) >> 6) + + ((b3g3r3b2 & 0xff000000) >> 24) + + dmp[(x + 3) & (DM_WIDTH - 1)]; + rgb13 += 0x10040100 + - ((rgb13 & 0x1e0001e0) >> 5) + - ((rgb13 & 0x00070000) >> 6); + ((unsigned int *)obptr)[1] = + ((rgb02 & 0x0f800000) >> 12) | + ((rgb02 & 0x0003f000) >> 7) | + ((rgb02 & 0x000000f8) >> 3) | + ((rgb13 & 0x0f800000) << 4) | + ((rgb13 & 0x0003f000) << 9) | + ((rgb13 & 0x000000f8) << 13); + bp2 += 12; + obptr += 8; + } + for (; x < width; x++) + { + int rgb = *bp2++ << 20; + rgb += *bp2++ << 10; + rgb += *bp2++; + rgb += dmp[x & (DM_WIDTH - 1)]; + rgb += 0x10040100 + - ((rgb & 0x1e0001e0) >> 5) + - ((rgb & 0x00070000) >> 6); + + ((unsigned short *)obptr)[0] = + ((rgb & 0x0f800000) >> 12) | + ((rgb & 0x0003f000) >> 7) | + ((rgb & 0x000000f8) >> 3); + obptr += 2; + } + } + bptr += rowstride; + obuf += bpl; + } +} +#else +static void +xlib_rgb_convert_565_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr; + + width += x_align; + height += y_align; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + (ax - x_align) * 2; + + for (y = y_align; y < height; y++) + { + unsigned int *dmp = DM_565 + ((y & (DM_HEIGHT - 1)) << DM_WIDTH_SHIFT); + unsigned char *bp2 = bptr; + + for (x = x_align; x < width; x++) + { + int rgb = *bp2++ << 20; + rgb += *bp2++ << 10; + rgb += *bp2++; + rgb += dmp[x & (DM_WIDTH - 1)]; + rgb += 0x10040100 + - ((rgb & 0x1e0001e0) >> 5) + - ((rgb & 0x00070000) >> 6); + + ((unsigned short *)obuf)[x] = + ((rgb & 0x0f800000) >> 12) | + ((rgb & 0x0003f000) >> 7) | + ((rgb & 0x000000f8) >> 3); + } + + bptr += rowstride; + obuf += bpl; + } +} +#endif + +static void +xlib_rgb_convert_555 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + unsigned char r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + ((unsigned short *)obuf)[x] = ((r & 0xf8) << 7) | + ((g & 0xf8) << 2) | + (b >> 3); + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_555_br (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + unsigned char r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 2; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + /* final word is: + g5 g4 g3 b7 b6 b5 b4 b3 0 r7 r6 r5 r4 r3 g7 g6 + */ + ((unsigned short *)obuf)[x] = ((r & 0xf8) >> 1) | + ((g & 0xc0) >> 6) | + ((g & 0x18) << 10) | + ((b & 0xf8) << 5); + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_888_msb (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int y; + unsigned char *obuf; + int bpl; + unsigned char *bptr; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 3; + for (y = 0; y < height; y++) + { + memcpy (obuf, bptr, (unsigned int)(width + width + width)); + bptr += rowstride; + obuf += bpl; + } +} + +/* todo: optimize this */ +#if X_BYTE_ORDER == X_LITTLE_ENDIAN +#define HAIRY_CONVERT_888 +#endif + +#ifdef HAIRY_CONVERT_888 +static void +xlib_rgb_convert_888_lsb (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 3; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + if (((unsigned long)obuf | (unsigned long) bp2) & 3) + { + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + *obptr++ = b; + *obptr++ = g; + *obptr++ = r; + bp2 += 3; + } + } + else + { + for (x = 0; x < width - 3; x += 4) + { + unsigned int r1b0g0r0; + unsigned int g2r2b1g1; + unsigned int b3g3r3b2; + + r1b0g0r0 = ((unsigned int *)bp2)[0]; + g2r2b1g1 = ((unsigned int *)bp2)[1]; + b3g3r3b2 = ((unsigned int *)bp2)[2]; + ((unsigned int *)obptr)[0] = + (r1b0g0r0 & 0xff00) | + ((r1b0g0r0 & 0xff0000) >> 16) | + (((g2r2b1g1 & 0xff00) | (r1b0g0r0 & 0xff)) << 16); + ((unsigned int *)obptr)[1] = + (g2r2b1g1 & 0xff0000ff) | + ((r1b0g0r0 & 0xff000000) >> 16) | + ((b3g3r3b2 & 0xff) << 16); + ((unsigned int *)obptr)[2] = + (((g2r2b1g1 & 0xff0000) | (b3g3r3b2 & 0xff000000)) >> 16) | + ((b3g3r3b2 & 0xff00) << 16) | + ((b3g3r3b2 & 0xff0000)); + bp2 += 12; + obptr += 12; + } + for (; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + *obptr++ = b; + *obptr++ = g; + *obptr++ = r; + bp2 += 3; + } + } + bptr += rowstride; + obuf += bpl; + } +} +#else +static void +xlib_rgb_convert_888_lsb (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 3; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + obuf[x * 3] = b; + obuf[x * 3 + 1] = g; + obuf[x * 3 + 2] = r; + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} +#endif + +/* convert 24-bit packed to 32-bit unpacked */ +/* todo: optimize this */ +static void +xlib_rgb_convert_0888 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 4; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + ((unsigned int *)obuf)[x] = (r << 16) | (g << 8) | b; + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_0888_br (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 4; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + ((unsigned int *)obuf)[x] = (b << 24) | (g << 16) | (r << 8); + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_8880_br (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * 4; + for (y = 0; y < height; y++) + { + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + ((unsigned int *)obuf)[x] = (b << 16) | (g << 8) | r; + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} + +/* Generic truecolor/directcolor conversion function. Slow, but these + are oddball modes. */ +static void +xlib_rgb_convert_truecolor_lsb (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + int r_right, r_left; + int g_right, g_left; + int b_right, b_left; + int bpp; + unsigned int pixel; + int i; + + r_right = 8 - image_info->red_prec; + r_left = image_info->red_shift; + g_right = 8 - image_info->green_prec; + g_left = image_info->green_shift; + b_right = 8 - image_info->blue_prec; + b_left = image_info->blue_shift; + bpp = image_info->bpp; + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; + for (y = 0; y < height; y++) + { + obptr = obuf; + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + pixel = ((r >> r_right) << r_left) | + ((g >> g_right) << g_left) | + ((b >> b_right) << b_left); + for (i = 0; i < bpp; i++) + { + *obptr++ = pixel & 0xff; + pixel >>= 8; + } + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_truecolor_lsb_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + int r_right, r_left, r_prec; + int g_right, g_left, g_prec; + int b_right, b_left, b_prec; + int bpp; + unsigned int pixel; + int i; + int dith; + int r1, g1, b1; + const unsigned char *dmp; + + r_right = 8 - image_info->red_prec; + r_left = image_info->red_shift; + r_prec = image_info->red_prec; + g_right = 8 - image_info->green_prec; + g_left = image_info->green_shift; + g_prec = image_info->green_prec; + b_right = 8 - image_info->blue_prec; + b_left = image_info->blue_shift; + b_prec = image_info->blue_prec; + bpp = image_info->bpp; + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; + for (y = 0; y < height; y++) + { + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + obptr = obuf; + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2; + r1 = r + (dith >> r_prec); + g1 = g + ((252 - dith) >> g_prec); + b1 = b + (dith >> b_prec); + pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) | + (((g1 - (g1 >> g_prec)) >> g_right) << g_left) | + (((b1 - (b1 >> b_prec)) >> b_right) << b_left); + for (i = 0; i < bpp; i++) + { + *obptr++ = pixel & 0xff; + pixel >>= 8; + } + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_truecolor_msb (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + int r_right, r_left; + int g_right, g_left; + int b_right, b_left; + int bpp; + unsigned int pixel; + int shift, shift_init; + + r_right = 8 - image_info->red_prec; + r_left = image_info->red_shift; + g_right = 8 - image_info->green_prec; + g_left = image_info->green_shift; + b_right = 8 - image_info->blue_prec; + b_left = image_info->blue_shift; + bpp = image_info->bpp; + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; + shift_init = (bpp - 1) << 3; + for (y = 0; y < height; y++) + { + obptr = obuf; + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + pixel = ((r >> r_right) << r_left) | + ((g >> g_right) << g_left) | + ((b >> b_right) << b_left); + for (shift = shift_init; shift >= 0; shift -= 8) + { + *obptr++ = (pixel >> shift) & 0xff; + } + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_truecolor_msb_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *obuf, *obptr; + int bpl; + unsigned char *bptr, *bp2; + int r, g, b; + int r_right, r_left, r_prec; + int g_right, g_left, g_prec; + int b_right, b_left, b_prec; + int bpp; + unsigned int pixel; + int shift, shift_init; + int dith; + int r1, g1, b1; + const unsigned char *dmp; + + r_right = 8 - image_info->red_prec; + r_left = image_info->red_shift; + r_prec = image_info->red_prec; + g_right = 8 - image_info->green_prec; + g_left = image_info->green_shift; + g_prec = image_info->green_prec; + b_right = 8 - image_info->blue_prec; + b_left = image_info->blue_shift; + b_prec = image_info->blue_prec; + bpp = image_info->bpp; + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax * bpp; + shift_init = (bpp - 1) << 3; + for (y = 0; y < height; y++) + { + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + obptr = obuf; + bp2 = bptr; + for (x = 0; x < width; x++) + { + r = bp2[0]; + g = bp2[1]; + b = bp2[2]; + dith = dmp[(x_align + x) & (DM_WIDTH - 1)] << 2; + r1 = r + (dith >> r_prec); + g1 = g + ((252 - dith) >> g_prec); + b1 = b + (dith >> b_prec); + pixel = (((r1 - (r1 >> r_prec)) >> r_right) << r_left) | + (((g1 - (g1 >> g_prec)) >> g_right) << g_left) | + (((b1 - (b1 >> b_prec)) >> b_right) << b_left); + for (shift = shift_init; shift >= 0; shift -= 8) + { + *obptr++ = (pixel >> shift) & 0xff; + } + bp2 += 3; + } + bptr += rowstride; + obuf += bpl; + } +} + +/* This actually works for depths from 3 to 7 */ +static void +xlib_rgb_convert_4 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + const unsigned char *dmp; + int dith; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + for (y = 0; y < height; y++) + { + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x += 1) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) | 3; + obptr[0] = colorcube_d[(((r + dith) & 0x100) >> 2) | + (((g + 258 - dith) & 0x100) >> 5) | + (((b + dith) & 0x100) >> 8)]; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} + +/* This actually works for depths from 3 to 7 */ +static void +xlib_rgb_convert_gray4 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + int shift; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + shift = 9 - image_info->x_visual_info->depth; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + obptr[0] = (g + ((b + r) >> 1)) >> shift; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_gray4_pack (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + int shift; + unsigned char pix0, pix1; + /* todo: this is hardcoded to big-endian. Make endian-agile. */ + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + (ax >> 1); + shift = 9 - image_info->x_visual_info->depth; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x += 2) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + pix0 = (g + ((b + r) >> 1)) >> shift; + r = *bp2++; + g = *bp2++; + b = *bp2++; + pix1 = (g + ((b + r) >> 1)) >> shift; + obptr[0] = (pix0 << 4) | pix1; + obptr++; + } + if (width & 1) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + pix0 = (g + ((b + r) >> 1)) >> shift; + obptr[0] = (pix0 << 4); + } + bptr += rowstride; + obuf += bpl; + } +} + +/* This actually works for depths from 3 to 7 */ +static void +xlib_rgb_convert_gray4_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + const unsigned char *dmp; + int prec, right; + int gray; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + ax; + prec = image_info->x_visual_info->depth; + right = 8 - prec; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + gray = (g + ((b + r) >> 1)) >> 1; + gray += (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) >> prec; + obptr[0] = (gray - (gray >> prec)) >> right; + obptr++; + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_gray4_d_pack (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + const unsigned char *dmp; + int prec, right; + int gray; + unsigned char pix0, pix1; + /* todo: this is hardcoded to big-endian. Make endian-agile. */ + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + (ax >> 1); + prec = image_info->x_visual_info->depth; + right = 8 - prec; + for (y = 0; y < height; y++) + { + bp2 = bptr; + obptr = obuf; + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + for (x = 0; x < width; x += 2) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + gray = (g + ((b + r) >> 1)) >> 1; + gray += (dmp[(x_align + x) & (DM_WIDTH - 1)] << 2) >> prec; + pix0 = (gray - (gray >> prec)) >> right; + r = *bp2++; + g = *bp2++; + b = *bp2++; + gray = (g + ((b + r) >> 1)) >> 1; + gray += (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) >> prec; + pix1 = (gray - (gray >> prec)) >> right; + obptr[0] = (pix0 << 4) | pix1; + obptr++; + } + if (width & 1) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + gray = (g + ((b + r) >> 1)) >> 1; + gray += (dmp[(x_align + x + 1) & (DM_WIDTH - 1)] << 2) >> prec; + pix0 = (gray - (gray >> prec)) >> right; + obptr[0] = (pix0 << 4); + } + bptr += rowstride; + obuf += bpl; + } +} + +static void +xlib_rgb_convert_1 (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + int x, y; + int bpl; + unsigned char *obuf, *obptr; + unsigned char *bptr, *bp2; + int r, g, b; + const unsigned char *dmp; + int dith; + unsigned char byte; + + bptr = buf; + bpl = image->bytes_per_line; + obuf = ((unsigned char *)image->data) + ay * bpl + (ax >> 3); + byte = 0; /* unnecessary, but it keeps gcc from complaining */ + for (y = 0; y < height; y++) + { + dmp = DM[(y_align + y) & (DM_HEIGHT - 1)]; + bp2 = bptr; + obptr = obuf; + for (x = 0; x < width; x++) + { + r = *bp2++; + g = *bp2++; + b = *bp2++; + dith = (dmp[(x_align + x) & (DM_WIDTH - 1)] << 4) | 4; + byte += byte + (r + g + g + b + dith > 1020); + if ((x & 7) == 7) + { + obptr[0] = byte; + obptr++; + } + } + if (x & 7) + obptr[0] = byte << (8 - (x & 7)); + bptr += rowstride; + obuf += bpl; + } +} + +/* Returns a pointer to the stage buffer. */ +static unsigned char * +xlib_rgb_ensure_stage (void) +{ + if (image_info->stage_buf == NULL) + image_info->stage_buf = malloc (IMAGE_HEIGHT * STAGE_ROWSTRIDE); + return image_info->stage_buf; +} + +/* This is slow. Speed me up, please. */ +static void +xlib_rgb_32_to_stage (unsigned char *buf, int rowstride, int width, int height) +{ + int x, y; + unsigned char *pi_start, *po_start; + unsigned char *pi, *po; + + pi_start = buf; + po_start = xlib_rgb_ensure_stage (); + for (y = 0; y < height; y++) + { + pi = pi_start; + po = po_start; + for (x = 0; x < width; x++) + { + *po++ = *pi++; + *po++ = *pi++; + *po++ = *pi++; + pi++; + } + pi_start += rowstride; + po_start += STAGE_ROWSTRIDE; + } +} + +/* Generic 32bit RGB conversion function - convert to 24bit packed, then + go from there. */ +static void +xlib_rgb_convert_32_generic (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + xlib_rgb_32_to_stage (buf, rowstride, width, height); + + (*image_info->conv) (image, ax, ay, width, height, + image_info->stage_buf, STAGE_ROWSTRIDE, + x_align, y_align, cmap); +} + +/* Generic 32bit RGB conversion function - convert to 24bit packed, then + go from there. */ +static void +xlib_rgb_convert_32_generic_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + xlib_rgb_32_to_stage (buf, rowstride, width, height); + + (*image_info->conv_d) (image, ax, ay, width, height, + image_info->stage_buf, STAGE_ROWSTRIDE, + x_align, y_align, cmap); +} + +/* This is slow. Speed me up, please. */ +static void +xlib_rgb_gray_to_stage (unsigned char *buf, int rowstride, int width, int height) +{ + int x, y; + unsigned char *pi_start, *po_start; + unsigned char *pi, *po; + unsigned char gray; + + pi_start = buf; + po_start = xlib_rgb_ensure_stage (); + for (y = 0; y < height; y++) + { + pi = pi_start; + po = po_start; + for (x = 0; x < width; x++) + { + gray = *pi++; + *po++ = gray; + *po++ = gray; + *po++ = gray; + } + pi_start += rowstride; + po_start += STAGE_ROWSTRIDE; + } +} + +/* Generic gray conversion function - convert to 24bit packed, then go + from there. */ +static void +xlib_rgb_convert_gray_generic (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + xlib_rgb_gray_to_stage (buf, rowstride, width, height); + + (*image_info->conv) (image, ax, ay, width, height, + image_info->stage_buf, STAGE_ROWSTRIDE, + x_align, y_align, cmap); +} + +static void +xlib_rgb_convert_gray_generic_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + xlib_rgb_gray_to_stage (buf, rowstride, width, height); + + (*image_info->conv_d) (image, ax, ay, width, height, + image_info->stage_buf, STAGE_ROWSTRIDE, + x_align, y_align, cmap); +} + +/* Render grayscale using indexed method. */ +static void +xlib_rgb_convert_gray_cmap (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + (*image_info->conv_indexed) (image, ax, ay, width, height, + buf, rowstride, + x_align, y_align, image_info->gray_cmap); +} + +#if 0 +static void +xlib_rgb_convert_gray_cmap_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + (*image_info->conv_indexed_d) (image, ax, ay, width, height, + buf, rowstride, + x_align, y_align, image_info->gray_cmap); +} +#endif + +/* This is slow. Speed me up, please. */ +static void +xlib_rgb_indexed_to_stage (unsigned char *buf, int rowstride, int width, int height, + XlibRgbCmap *cmap) +{ + int x, y; + unsigned char *pi_start, *po_start; + unsigned char *pi, *po; + int rgb; + + pi_start = buf; + po_start = xlib_rgb_ensure_stage (); + for (y = 0; y < height; y++) + { + pi = pi_start; + po = po_start; + for (x = 0; x < width; x++) + { + rgb = cmap->colors[*pi++]; + *po++ = rgb >> 16; + *po++ = (rgb >> 8) & 0xff; + *po++ = rgb & 0xff; + } + pi_start += rowstride; + po_start += STAGE_ROWSTRIDE; + } +} + +/* Generic gray conversion function - convert to 24bit packed, then go + from there. */ +static void +xlib_rgb_convert_indexed_generic (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, XlibRgbCmap *cmap) +{ + xlib_rgb_indexed_to_stage (buf, rowstride, width, height, cmap); + + (*image_info->conv) (image, ax, ay, width, height, + image_info->stage_buf, STAGE_ROWSTRIDE, + x_align, y_align, cmap); +} + +static void +xlib_rgb_convert_indexed_generic_d (XImage *image, + int ax, int ay, int width, int height, + unsigned char *buf, int rowstride, + int x_align, int y_align, + XlibRgbCmap *cmap) +{ + xlib_rgb_indexed_to_stage (buf, rowstride, width, height, cmap); + + (*image_info->conv_d) (image, ax, ay, width, height, + image_info->stage_buf, STAGE_ROWSTRIDE, + x_align, y_align, cmap); +} + +/* Select a conversion function based on the visual and a + representative image. */ +static void +xlib_rgb_select_conv (XImage *image, ByteOrder byte_order) +{ + int depth, byterev; + int vtype; /* visual type */ + int bpp; /* bits per pixel - from the visual */ + unsigned int red_mask, green_mask, blue_mask; + XlibRgbConvFunc conv, conv_d; + XlibRgbConvFunc conv_32, conv_32_d; + XlibRgbConvFunc conv_gray, conv_gray_d; + XlibRgbConvFunc conv_indexed, conv_indexed_d; + Bool mask_rgb, mask_bgr; + + depth = image_info->x_visual_info->depth; + bpp = image->bits_per_pixel; + if (xlib_rgb_verbose) + printf ("Chose visual 0x%x, image bpp=%d, %s first\n", + (int)image_info->x_visual_info->visual->visualid, + bpp, byte_order == LSB_FIRST ? "lsb" : "msb"); + +#if X_BYTE_ORDER == X_BIG_ENDIAN + byterev = (byte_order == LSB_FIRST); +#else + byterev = (byte_order == MSB_FIRST); +#endif + + vtype = image_info->x_visual_info->class; + if (vtype == DirectColor) + vtype = TrueColor; + + red_mask = image_info->x_visual_info->red_mask; + green_mask = image_info->x_visual_info->green_mask; + blue_mask = image_info->x_visual_info->blue_mask; + + mask_rgb = red_mask == 0xff0000 && green_mask == 0xff00 && blue_mask == 0xff; + mask_bgr = red_mask == 0xff && green_mask == 0xff00 && blue_mask == 0xff0000; + + conv = NULL; + conv_d = NULL; + + conv_32 = xlib_rgb_convert_32_generic; + conv_32_d = xlib_rgb_convert_32_generic_d; + + conv_gray = xlib_rgb_convert_gray_generic; + conv_gray_d = xlib_rgb_convert_gray_generic_d; + + conv_indexed = xlib_rgb_convert_indexed_generic; + conv_indexed_d = xlib_rgb_convert_indexed_generic_d; + + image_info->dith_default = FALSE; + + if (image_info->bitmap) + conv = xlib_rgb_convert_1; + else if (bpp == 16 && depth == 16 && !byterev && + red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f) + { + conv = xlib_rgb_convert_565; + conv_d = xlib_rgb_convert_565_d; + conv_gray = xlib_rgb_convert_565_gray; + xlib_rgb_preprocess_dm_565 (); + } + else if (bpp == 16 && depth == 16 && + vtype == TrueColor&& byterev && + red_mask == 0xf800 && green_mask == 0x7e0 && blue_mask == 0x1f) + conv = xlib_rgb_convert_565_br; + + else if (bpp == 16 && depth == 15 && + vtype == TrueColor && !byterev && + red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f) + conv = xlib_rgb_convert_555; + + else if (bpp == 16 && depth == 15 && + vtype == TrueColor && byterev && + red_mask == 0x7c00 && green_mask == 0x3e0 && blue_mask == 0x1f) + conv = xlib_rgb_convert_555_br; + + /* I'm not 100% sure about the 24bpp tests - but testing will show*/ + else if (bpp == 24 && depth == 24 && vtype == TrueColor && + ((mask_rgb && byte_order == LSB_FIRST) || + (mask_bgr && byte_order == MSB_FIRST))) + conv = xlib_rgb_convert_888_lsb; + else if (bpp == 24 && depth == 24 && vtype == TrueColor && + ((mask_rgb && byte_order == MSB_FIRST) || + (mask_bgr && byte_order == LSB_FIRST))) + conv = xlib_rgb_convert_888_msb; +#if X_BYTE_ORDER == X_BIG_ENDIAN + else if (bpp == 32 && depth == 24 && vtype == TrueColor && + (mask_rgb && byte_order == LSB_FIRST)) + conv = xlib_rgb_convert_0888_br; + else if (bpp == 32 && depth == 24 && vtype == TrueColor && + (mask_rgb && byte_order == MSB_FIRST)) + conv = xlib_rgb_convert_0888; + else if (bpp == 32 && depth == 24 && vtype == TrueColor && + (mask_bgr && byte_order == MSB_FIRST)) + conv = xlib_rgb_convert_8880_br; +#else + else if (bpp == 32 && depth == 24 && vtype == TrueColor && + (mask_rgb && byte_order == MSB_FIRST)) + conv = xlib_rgb_convert_0888_br; + else if (bpp == 32 && (depth == 32 || depth == 24) && vtype == TrueColor && + (mask_rgb && byte_order == LSB_FIRST)) + conv = xlib_rgb_convert_0888; + else if (bpp == 32 && depth == 24 && vtype == TrueColor && + (mask_bgr && byte_order == LSB_FIRST)) + conv = xlib_rgb_convert_8880_br; +#endif + + else if (vtype == TrueColor && byte_order == LSB_FIRST) + { + conv = xlib_rgb_convert_truecolor_lsb; + conv_d = xlib_rgb_convert_truecolor_lsb_d; + } + else if (vtype == TrueColor && byte_order == MSB_FIRST) + { + conv = xlib_rgb_convert_truecolor_msb; + conv_d = xlib_rgb_convert_truecolor_msb_d; + } + else if (bpp == 8 && depth == 8 && (vtype == PseudoColor +#ifdef ENABLE_GRAYSCALE + || vtype == GrayScale +#endif + )) + { + image_info->dith_default = TRUE; + conv = xlib_rgb_convert_8; + if (vtype != GrayScale) + { + if (image_info->nred_shades == 6 && + image_info->ngreen_shades == 6 && + image_info->nblue_shades == 6) + conv_d = xlib_rgb_convert_8_d666; + else + conv_d = xlib_rgb_convert_8_d; + } + conv_indexed = xlib_rgb_convert_8_indexed; + conv_gray = xlib_rgb_convert_gray_cmap; + } + else if (bpp == 8 && depth == 8 && (vtype == StaticGray +#ifdef not_ENABLE_GRAYSCALE + || vtype == GrayScale +#endif + )) + { + conv = xlib_rgb_convert_gray8; + conv_gray = xlib_rgb_convert_gray8_gray; + } + else if (bpp == 8 && depth < 8 && depth >= 2 && + (vtype == StaticGray + || vtype == GrayScale)) + { + conv = xlib_rgb_convert_gray4; + conv_d = xlib_rgb_convert_gray4_d; + } + else if (bpp == 8 && depth < 8 && depth >= 3) + { + conv = xlib_rgb_convert_4; + } + else if (bpp == 4 && depth <= 4 && depth >= 2 && + (vtype == StaticGray + || vtype == GrayScale)) + { + conv = xlib_rgb_convert_gray4_pack; + conv_d = xlib_rgb_convert_gray4_d_pack; + } + + if (conv_d == NULL) + conv_d = conv; + + image_info->conv = conv; + image_info->conv_d = conv_d; + + image_info->conv_32 = conv_32; + image_info->conv_32_d = conv_32_d; + + image_info->conv_gray = conv_gray; + image_info->conv_gray_d = conv_gray_d; + + image_info->conv_indexed = conv_indexed; + image_info->conv_indexed_d = conv_indexed_d; +} + +static int horiz_idx; +static int horiz_y = IMAGE_HEIGHT; +static int vert_idx; +static int vert_x = IMAGE_WIDTH; +static int tile_idx; +static int tile_x = IMAGE_WIDTH; +static int tile_y1 = IMAGE_HEIGHT; +static int tile_y2 = IMAGE_HEIGHT; + +#ifdef VERBOSE +static int sincelast; +#endif + +/* Defining NO_FLUSH can cause inconsistent screen updates, but is useful + for performance evaluation. */ + +#undef NO_FLUSH + +static int +xlib_rgb_alloc_scratch_image (void) +{ + if (static_image_idx == N_IMAGES) + { +#ifndef NO_FLUSH + XFlush(image_info->display); +#endif +#ifdef VERBOSE + printf ("flush, %d puts since last flush\n", sincelast); + sincelast = 0; +#endif + static_image_idx = 0; + horiz_y = IMAGE_HEIGHT; + vert_x = IMAGE_WIDTH; + tile_x = IMAGE_WIDTH; + tile_y1 = tile_y2 = IMAGE_HEIGHT; + } + return static_image_idx++; +} + +static XImage * +xlib_rgb_alloc_scratch (int width, int height, int *ax, int *ay) +{ + XImage *image; + int idx; + + if (width >= (IMAGE_WIDTH >> 1)) + { + if (height >= (IMAGE_HEIGHT >> 1)) + { + idx = xlib_rgb_alloc_scratch_image (); + *ax = 0; + *ay = 0; + } + else + { + if (height + horiz_y > IMAGE_HEIGHT) + { + horiz_idx = xlib_rgb_alloc_scratch_image (); + horiz_y = 0; + } + idx = horiz_idx; + *ax = 0; + *ay = horiz_y; + horiz_y += height; + } + } + else + { + if (height >= (IMAGE_HEIGHT >> 1)) + { + if (width + vert_x > IMAGE_WIDTH) + { + vert_idx = xlib_rgb_alloc_scratch_image (); + vert_x = 0; + } + idx = vert_idx; + *ax = vert_x; + *ay = 0; + /* using 3 and -4 would be slightly more efficient on 32-bit machines + with > 1bpp displays */ + vert_x += (width + 7) & -8; + } + else + { + if (width + tile_x > IMAGE_WIDTH) + { + tile_y1 = tile_y2; + tile_x = 0; + } + if (height + tile_y1 > IMAGE_HEIGHT) + { + tile_idx = xlib_rgb_alloc_scratch_image (); + tile_x = 0; + tile_y1 = 0; + tile_y2 = 0; + } + if (height + tile_y1 > tile_y2) + tile_y2 = height + tile_y1; + idx = tile_idx; + *ax = tile_x; + *ay = tile_y1; + tile_x += (width + 7) & -8; + } + } + image = static_image[idx]; +#ifdef VERBOSE + printf ("index %d, x %d, y %d (%d x %d)\n", idx, *ax, *ay, width, height); + sincelast++; +#endif + return image; +} + +static void +xlib_draw_rgb_image_core (Drawable drawable, + GC gc, + int x, + int y, + int width, + int height, + unsigned char *buf, + int pixstride, + int rowstride, + XlibRgbConvFunc conv, + XlibRgbCmap *cmap, + int xdith, + int ydith) +{ + int ay, ax; + int xs0, ys0; + XImage *image; + int width1, height1; + unsigned char *buf_ptr; + + if (image_info->bitmap) + { + if (image_info->own_gc == 0) + { + XColor color; + + image_info->own_gc = XCreateGC(image_info->display, + drawable, + 0, NULL); + color.pixel = WhitePixel(image_info->display, + image_info->screen_num); + XSetForeground(image_info->display, image_info->own_gc, color.pixel); + color.pixel = BlackPixel(image_info->display, + image_info->screen_num); + XSetBackground(image_info->display, image_info->own_gc, color.pixel); + } + gc = image_info->own_gc; + } + for (ay = 0; ay < height; ay += IMAGE_HEIGHT) + { + height1 = MIN (height - ay, IMAGE_HEIGHT); + for (ax = 0; ax < width; ax += IMAGE_WIDTH) + { + width1 = MIN (width - ax, IMAGE_WIDTH); + buf_ptr = buf + ay * rowstride + ax * pixstride; + + image = xlib_rgb_alloc_scratch (width1, height1, &xs0, &ys0); + + conv (image, xs0, ys0, width1, height1, buf_ptr, rowstride, + x + ax + xdith, y + ay + ydith, cmap); + +#ifndef DONT_ACTUALLY_DRAW + XPutImage(image_info->display, drawable, gc, image, + xs0, ys0, x + ax, y + ay, (unsigned int)width1, (unsigned int)height1); +#endif + } + } +} + + +/** + * xlib_draw_rgb_image: + * @drawable: Destination drawable. + * @gc: A graphic context. + * @x: Leftmost coordinate of the destination rectangle. + * @y: Upper coordinate of the destination rectangle. + * @width: Width of the destination rectangle, in pixels. + * @height: Height of the destination rectangle, in pixels. + * @dith: Dithering method to use. + * @rgb_buf: Pointer to the pixel in the RGB buffer that corresponds to the + * upper-left corner of the rectangular region to render. + * @rowstride: Offset between pixel rows in the RGB buffer, in bytes. + * + * Renders an RGB buffer to a drawable. Pixels are specified as RGB triplets + * with 8 bits per channel. An image will thus look like an RGBRGBRGBRGB + * sequence of 8-bit values. This function does not let you specify dither + * offsets; applications that need to render partial regions of a buffer to + * build the final image should use xlib_draw_rgb_image_dithalign() instead. + **/ +void +xlib_draw_rgb_image (Drawable drawable, + GC gc, + int x, + int y, + int width, + int height, + XlibRgbDither dith, + unsigned char *rgb_buf, + int rowstride) +{ + if (dith == XLIB_RGB_DITHER_NONE || (dith == XLIB_RGB_DITHER_NORMAL && + !image_info->dith_default)) + xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, + rgb_buf, 3, rowstride, image_info->conv, NULL, + 0, 0); + else + xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, + rgb_buf, 3, rowstride, image_info->conv_d, NULL, + 0, 0); +} + + + +/** + * xlib_rgb_cmap_free: + * @cmap: An XlibRGB colormap. + * + * Frees an XlibRGB colormap. + **/ +void +xlib_rgb_cmap_free (XlibRgbCmap *cmap) +{ + free (cmap); +} + +/** + * xlib_draw_indexed_image: + * @drawable: FIXME + * @gc: FIXME + * @x: FIXME + * @y: FIXME + * @width: FIXME + * @height: FIXME + * @dith: FIXME + * @buf: FIXME + * @rowstride: FIXME + * @cmap: FIXME + * + * FIXME + **/ +void +xlib_draw_indexed_image (Drawable drawable, + GC gc, + int x, + int y, + int width, + int height, + XlibRgbDither dith, + unsigned char *buf, + int rowstride, + XlibRgbCmap *cmap) +{ + if (dith == XLIB_RGB_DITHER_NONE || (dith == XLIB_RGB_DITHER_NORMAL && + !image_info->dith_default)) + xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, + buf, 1, rowstride, + image_info->conv_indexed, cmap, 0, 0); + else + xlib_draw_rgb_image_core (drawable, gc, x, y, width, height, + buf, 1, rowstride, + image_info->conv_indexed_d, cmap, 0, 0); +} + +/** + * xlib_rgb_ditherable: + * + * Queries whether XlibRGB supports dithering for its chosen visual. + * + * Return value: TRUE if dithering can be performed for the visual that XlibRGB + * is using, FALSE otherwise. + **/ +Bool +xlib_rgb_ditherable (void) +{ + return (image_info->conv != image_info->conv_d); +} + +/** + * xlib_rgb_get_cmap: + * + * Queries the X colormap that XlibRGB is using. + * + * Return value: An X colormap. + **/ +Colormap +xlib_rgb_get_cmap (void) +{ + /* xlib_rgb_init (); */ + if (image_info) + return image_info->cmap; + else + return 0; +} + +/** + * xlib_rgb_get_visual: + * + * Queries the visual that XlibRGB is using. + * + * Return value: An X visual. + **/ +Visual * +xlib_rgb_get_visual (void) +{ + /* xlib_rgb_init (); */ + if (image_info) + return image_info->x_visual_info->visual; + else + return 0; +} + +/** + * xlib_rgb_get_visual_info: + * + * Queries the visual info structure for the visual that XlibRGB is using. + * + * Return value: An XVisualInfo structure. + **/ +XVisualInfo * +xlib_rgb_get_visual_info (void) +{ + /* xlib_rgb_init (); */ + if (image_info) + return image_info->x_visual_info; + else + return 0; +} + +/** + * xlib_rgb_get_depth: + * + * Queries the depth of the visual that XlibRGB is using. + * + * Return value: Bit depth. + **/ +int +xlib_rgb_get_depth (void) +{ + XVisualInfo * v = xlib_rgb_get_visual_info(); + + if (v) + { + return v->depth; + } + + return 0; +} + +/** + * xlib_rgb_get_display: + * + * Queries the X display that XlibRGB is using. + * + * Return value: An X display. + **/ +Display * +xlib_rgb_get_display (void) +{ + if (image_info) + return image_info->display; + + return NULL; +} + +/** + * xlib_rgb_get_screen: + * + * Queries the screen that XlibRGB is using. + * + * Return value: An X screen. + **/ +Screen * +xlib_rgb_get_screen (void) +{ + if (image_info) + return image_info->screen; + + return NULL; +} |