summaryrefslogtreecommitdiffstats
path: root/tools/qvfb/qanimationwriter.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'tools/qvfb/qanimationwriter.cpp')
-rw-r--r--tools/qvfb/qanimationwriter.cpp414
1 files changed, 414 insertions, 0 deletions
diff --git a/tools/qvfb/qanimationwriter.cpp b/tools/qvfb/qanimationwriter.cpp
new file mode 100644
index 0000000..35d6131
--- /dev/null
+++ b/tools/qvfb/qanimationwriter.cpp
@@ -0,0 +1,414 @@
+/**********************************************************************
+** Copyright (C) 1992-2008 Trolltech ASA. All rights reserved.
+**
+** This file is part of Qt/Embedded virtual framebuffer.
+**
+** This file may be used under the terms of the GNU General
+** Public License versions 2.0 or 3.0 as published by the Free
+** Software Foundation and appearing in the files LICENSE.GPL2
+** and LICENSE.GPL3 included in the packaging of this file.
+** Alternatively you may (at your option) use any later version
+** of the GNU General Public License if such license has been
+** publicly approved by Trolltech ASA (or its successors, if any)
+** and the KDE Free Qt Foundation.
+**
+** Please review the following information to ensure GNU General
+** Public Licensing requirements will be met:
+** http://trolltech.com/products/qt/licenses/licensing/opensource/.
+** If you are unsure which license is appropriate for your use, please
+** review the following information:
+** http://trolltech.com/products/qt/licenses/licensing/licensingoverview
+** or contact the sales department at sales@trolltech.com.
+**
+** Licensees holding valid Qt Commercial licenses may use this file in
+** accordance with the Qt Commercial License Agreement provided with
+** the Software.
+**
+** This file is provided "AS IS" with NO WARRANTY OF ANY KIND,
+** INCLUDING THE WARRANTIES OF DESIGN, MERCHANTABILITY AND FITNESS FOR
+** A PARTICULAR PURPOSE. Trolltech reserves all rights not granted
+** herein.
+**
+**********************************************************************/
+
+#include "qanimationwriter.h"
+
+#define QT_CLEAN_NAMESPACE
+#include <qfile.h>
+
+#include <png.h>
+#include <netinet/in.h> // for htonl
+
+class QAnimationWriterData {
+public:
+ QAnimationWriterData(QIODevice* d) : dev(d)
+ {
+ framerate = 1000;
+ }
+ void setFrameRate(int d) { framerate = d; }
+ virtual ~QAnimationWriterData() { }
+ virtual void setImage(const QImage& src)=0;
+ virtual bool canCompose() const { return FALSE; }
+ virtual void composeImage(const QImage&, const QPoint& ) { }
+
+protected:
+ int framerate;
+ QIODevice* dev;
+};
+
+
+class QAnimationWriterMNG : public QAnimationWriterData {
+ bool first;
+ png_structp png_ptr;
+ png_infop info_ptr;
+public:
+ QAnimationWriterMNG(QIODevice* d) : QAnimationWriterData(d)
+ {
+ first = TRUE;
+ begin_png();
+ }
+
+ ~QAnimationWriterMNG()
+ {
+ if ( first ) {
+ // Eh? Not images.
+ QImage dummy(1,1,32);
+ setImage(dummy);
+ }
+ writeMEND();
+ end_png();
+ }
+
+ void begin_png()
+ {
+ png_ptr = png_create_write_struct(PNG_LIBPNG_VER_STRING,0,0,0);
+ info_ptr = png_create_info_struct(png_ptr);
+ png_set_compression_level(png_ptr,9);
+ png_set_write_fn(png_ptr, (void*)this, write, 0);
+ }
+
+ void end_png()
+ {
+ png_destroy_write_struct(&png_ptr, &info_ptr);
+ }
+
+
+ static void write( png_structp png_ptr, png_bytep data, png_size_t length)
+ {
+ QAnimationWriterMNG* that = (QAnimationWriterMNG*)png_get_io_ptr(png_ptr);
+ /*uint nw =*/ that->dev->writeBlock((const char*)data,length);
+ }
+
+ void writePNG(const QImage& image)
+ {
+ info_ptr->channels = 4;
+ png_set_sig_bytes(png_ptr, 8); // Pretend we already wrote the sig
+ png_set_IHDR(png_ptr, info_ptr, image.width(), image.height(),
+ 8, image.hasAlphaBuffer()
+ ? PNG_COLOR_TYPE_RGB_ALPHA : PNG_COLOR_TYPE_RGB,
+ 0, 0, 0);
+ png_write_info(png_ptr, info_ptr);
+ if ( !image.hasAlphaBuffer() )
+ png_set_filler(png_ptr, 0,
+ QImage::systemByteOrder() == QImage::BigEndian ?
+ PNG_FILLER_BEFORE : PNG_FILLER_AFTER);
+ //if ( QImage::systemByteOrder() == QImage::BigEndian ) {
+ //png_set_swap_alpha(png_ptr);
+ //}
+ if ( QImage::systemByteOrder() == QImage::LittleEndian ) {
+ png_set_bgr(png_ptr);
+ }
+
+ png_bytep* row_pointers;
+ uint height = image.height();
+ uchar** jt = image.jumpTable();
+ row_pointers=new png_bytep[height];
+ uint y;
+ for (y=0; y<height; y++) {
+ row_pointers[y]=jt[y];
+ }
+ png_write_image(png_ptr, row_pointers);
+ delete [] row_pointers;
+ png_write_end(png_ptr, info_ptr);
+ end_png();
+ begin_png();
+ }
+
+ void writeMHDR( const QSize& size, int framerate )
+ {
+ dev->writeBlock("\212MNG\r\n\032\n", 8);
+
+ struct {
+ int width;
+ int height;
+ int framerate;
+ int a,b,c;
+ int profile;
+ } chunk;
+ chunk.width = htonl(size.width());
+ chunk.height = htonl(size.height());
+ chunk.framerate = htonl(framerate);
+ chunk.a=0;
+ chunk.b=0;
+ chunk.c=0;
+ chunk.profile= htonl(0x00000003);
+
+ png_write_chunk(png_ptr, (png_byte*)"MHDR", (png_byte*)&chunk, sizeof(chunk));
+ }
+
+ void writeMEND()
+ {
+ png_write_chunk(png_ptr, (png_byte*)"MEND", 0, 0);
+ }
+
+ void writeDEFI( const QPoint& offset, const QSize& size )
+ {
+ struct {
+ ushort o;
+ uchar s;
+ uchar concrete;
+ int x,y;
+ int lc,rc,tc,bc;
+ } chunk;
+ chunk.o=0;
+ chunk.s=0;
+ chunk.concrete=1;
+ chunk.x=htonl(offset.x());
+ chunk.y=htonl(offset.y());
+ chunk.lc=0;
+ chunk.rc=0;
+ chunk.tc=htonl(INT_MAX);
+ chunk.bc=htonl(INT_MAX);
+
+ png_write_chunk(png_ptr, (png_byte*)"DEFI", (png_byte*)&chunk, sizeof(chunk));
+ }
+
+ void writeFRAM( const QSize& size )
+ {
+ struct {
+ uchar mode;
+ uchar n;
+ uchar nu;
+ uchar d;
+ uchar t;
+ uchar clip;
+ uchar s;
+ uchar deltatype;
+ uint left;
+ uint right;
+ uint top;
+ uint bottom;
+ } chunk;
+ chunk.mode=1;
+ chunk.n='a';
+ chunk.nu=0;
+ chunk.d=0;
+ chunk.clip=1;
+ chunk.t=0;
+ chunk.s=0;
+ chunk.deltatype=0;
+ chunk.left=0;
+ chunk.right=htonl(size.width());
+ chunk.top=0;
+ chunk.bottom=htonl(size.height());
+
+ png_write_chunk(png_ptr, (png_byte*)"FRAM", (png_byte*)&chunk, sizeof(chunk));
+ }
+
+ void writeMOVE( const QPoint& offset )
+ {
+ struct {
+ uchar filler[3];
+ uchar z[5];
+ int x,y;
+ } chunk;
+ memset(chunk.z,0,5);
+ chunk.x=htonl(offset.x());
+ chunk.y=htonl(offset.y());
+
+ png_write_chunk(png_ptr, (png_byte*)"MOVE", ((png_byte*)&chunk)+3, sizeof(chunk)-3);
+ }
+
+ void setImage(const QImage& src)
+ {
+ if ( first ) {
+ first = FALSE;
+ writeMHDR(src.size(),framerate);
+ }
+ composeImage(src,QPoint(0,0));
+ }
+
+ bool canCompose() const { return TRUE; }
+
+ void composeImage(const QImage& src, const QPoint& offset)
+ {
+ writeMOVE(offset);
+ //writeFRAM(src.size());
+ writePNG(src);
+ }
+};
+
+QAnimationWriter::QAnimationWriter( const QString& filename, const char* format )
+{
+ if ( QCString(format) != "MNG" ) {
+ qWarning("Format \"%s\" not supported, only MNG", format);
+ dev = 0;
+ d = 0;
+ } else {
+ QFile *f = new QFile(filename);
+ f->open(IO_WriteOnly);
+ dev = f;
+ d = new QAnimationWriterMNG(dev);
+ }
+}
+
+bool QAnimationWriter::okay() const
+{
+ return dev && dev->status() == IO_Ok;
+}
+
+QAnimationWriter::~QAnimationWriter()
+{
+ delete d;
+ delete dev;
+}
+
+void QAnimationWriter::setFrameRate(int r)
+{
+ if (d) d->setFrameRate(r);
+}
+
+void QAnimationWriter::appendFrame(const QImage& frm, const QPoint& offset)
+{
+ QImage frame = frm.convertDepth(32);
+ const int alignx = 1;
+ if ( dev ) {
+ if ( prev.isNull() || !d->canCompose() ) {
+ d->setImage(frame);
+ } else {
+ bool done;
+ int minx, maxx, miny, maxy;
+ int w = frame.width();
+ int h = frame.height();
+
+ QRgb** jt = (QRgb**)frame.jumpTable();
+ QRgb** pjt = (QRgb**)prev.jumpTable() + offset.y();
+
+ // Find left edge of change
+ done = FALSE;
+ for (minx = 0; minx < w && !done; minx++) {
+ for (int ty = 0; ty < h; ty++) {
+ if ( jt[ty][minx] != pjt[ty][minx+offset.x()] ) {
+ done = TRUE;
+ break;
+ }
+ }
+ }
+ minx--;
+
+ // Find right edge of change
+ done = FALSE;
+ for (maxx = w-1; maxx >= 0 && !done; maxx--) {
+ for (int ty = 0; ty < h; ty++) {
+ if ( jt[ty][maxx] != pjt[ty][maxx+offset.x()] ) {
+ done = TRUE;
+ break;
+ }
+ }
+ }
+ maxx++;
+
+ // Find top edge of change
+ done = FALSE;
+ for (miny = 0; miny < h && !done; miny++) {
+ for (int tx = 0; tx < w; tx++) {
+ if ( jt[miny][tx] != pjt[miny][tx+offset.x()] ) {
+ done = TRUE;
+ break;
+ }
+ }
+ }
+ miny--;
+
+ // Find right edge of change
+ done = FALSE;
+ for (maxy = h-1; maxy >= 0 && !done; maxy--) {
+ for (int tx = 0; tx < w; tx++) {
+ if ( jt[maxy][tx] != pjt[maxy][tx+offset.x()] ) {
+ done = TRUE;
+ break;
+ }
+ }
+ }
+ maxy++;
+
+ if ( minx > maxx ) minx=maxx=0;
+ if ( miny > maxy ) miny=maxy=0;
+
+ if ( alignx > 1 ) {
+ minx -= minx % alignx;
+ maxx = maxx - maxx % alignx + alignx - 1;
+ }
+
+ int dw = maxx-minx+1;
+ int dh = maxy-miny+1;
+
+ QImage diff(dw, dh, 32);
+
+ diff.setAlphaBuffer(TRUE);
+ int x, y;
+ for (y = 0; y < dh; y++) {
+ QRgb* li = (QRgb*)frame.scanLine(y+miny)+minx;
+ QRgb* lp = (QRgb*)prev.scanLine(y+miny+offset.y())+minx+offset.x();
+ QRgb* ld = (QRgb*)diff.scanLine(y);
+ if ( alignx ) {
+ for (x = 0; x < dw; x+=alignx) {
+ int i;
+ for (i=0; i<alignx; i++) {
+ if ( li[x+i] != lp[x+i] )
+ break;
+ }
+ if ( i == alignx ) {
+ // All the same
+ for (i=0; i<alignx; i++) {
+ ld[x+i] = qRgba(0,0,0,0);
+ }
+ } else {
+ // Some different
+ for (i=0; i<alignx; i++) {
+ ld[x+i] = 0xff000000 | li[x+i];
+ }
+ }
+ }
+ } else {
+ for (x = 0; x < dw; x++) {
+ if ( li[x] != lp[x] )
+ ld[x] = 0xff000000 | li[x];
+ else
+ ld[x] = qRgba(0,0,0,0);
+ }
+ }
+ }
+qDebug("%d,%d %d,%d",minx,miny,offset.x(),offset.y());
+ d->composeImage(diff,QPoint(minx,miny)+offset);
+ }
+ if ( prev.isNull() || prev.size() == frame.size() && offset == QPoint(0,0) ) {
+ prev = frame;
+ } else {
+ bitBlt(&prev,offset.x(),offset.y(),&frame,0,0,frame.width(),frame.height());
+ }
+ }
+}
+
+void QAnimationWriter::appendFrame(const QImage& frm)
+{
+ appendFrame(frm,QPoint(0,0));
+}
+
+void QAnimationWriter::appendBlankFrame()
+{
+ QImage i(1,1,32);
+ i.setAlphaBuffer(TRUE);
+ i.fill(0);
+ d->composeImage(i,QPoint(0,0));
+}
generated by cgit v1.2.1 (git 2.18.0) at 2024-10-19 19:40:56 +0000