diff options
Diffstat (limited to 'chalk/ui/kis_opengl_image_context.cc')
| -rw-r--r-- | chalk/ui/kis_opengl_image_context.cc | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/chalk/ui/kis_opengl_image_context.cc b/chalk/ui/kis_opengl_image_context.cc new file mode 100644 index 00000000..6a302192 --- /dev/null +++ b/chalk/ui/kis_opengl_image_context.cc @@ -0,0 +1,371 @@ +/* + * Copyright (c) 2005 Adrian Page <adrian@pagenet.plus.com> + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#ifdef HAVE_GL + +#include <kdebug.h> +#include <ksharedptr.h> + +#include "kis_global.h" +#include "kis_meta_registry.h" +#include "kis_colorspace_factory_registry.h" +#include "kis_image.h" +#include "kis_layer.h" +#include "kis_selection.h" +#include "kis_background.h" +#include "kis_opengl_canvas.h" +#include "kis_opengl_image_context.h" + +using namespace std; + +TQGLWidget *KisOpenGLImageContext::SharedContextWidget = 0; +int KisOpenGLImageContext::SharedContextWidgetRefCount = 0; + +KisOpenGLImageContext::ImageContextMap KisOpenGLImageContext::imageContextMap; + +KisOpenGLImageContext::KisOpenGLImageContext() +{ + m_image = 0; + m_monitorProfile = 0; + m_exposure = 0; +} + +KisOpenGLImageContext::~KisOpenGLImageContext() +{ + kdDebug(41001) << "Destroyed KisOpenGLImageContext\n"; + + --SharedContextWidgetRefCount; + kdDebug(41001) << "Shared context widget ref count now " << SharedContextWidgetRefCount << endl; + + if (SharedContextWidgetRefCount == 0) { + + kdDebug(41001) << "Deleting shared context widget\n"; + delete SharedContextWidget; + SharedContextWidget = 0; + } + + imageContextMap.erase(m_image); +} + +KisOpenGLImageContext::KisOpenGLImageContext(KisImageSP image, KisProfile *monitorProfile) +{ + kdDebug(41001) << "Created KisOpenGLImageContext\n"; + + m_image = image; + m_monitorProfile = monitorProfile; + m_exposure = 0; + m_displaySelection = true; + + if (SharedContextWidget == 0) { + kdDebug(41001) << "Creating shared context widget\n"; + + SharedContextWidget = new TQGLWidget(KisOpenGLCanvasFormat); + } + + ++SharedContextWidgetRefCount; + + kdDebug(41001) << "Shared context widget ref count now " << SharedContextWidgetRefCount << endl; + + SharedContextWidget->makeCurrent(); + glGenTextures(1, &m_backgroundTexture); + generateBackgroundTexture(); + + GLint max_texture_size; + + glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_texture_size); + + m_imageTextureTileWidth = TQMIN(PREFERRED_IMAGE_TEXTURE_WIDTH, max_texture_size); + m_imageTextureTileHeight = TQMIN(PREFERRED_IMAGE_TEXTURE_HEIGHT, max_texture_size); + + createImageTextureTiles(); + + connect(m_image, TQT_SIGNAL(sigImageUpdated(TQRect)), + TQT_SLOT(slotImageUpdated(TQRect))); + connect(m_image, TQT_SIGNAL(sigSizeChanged(TQ_INT32, TQ_INT32)), + TQT_SLOT(slotImageSizeChanged(TQ_INT32, TQ_INT32))); + + updateImageTextureTiles(m_image->bounds()); +} + +KisOpenGLImageContextSP KisOpenGLImageContext::getImageContext(KisImageSP image, KisProfile *monitorProfile) +{ + if (imageCanShareImageContext(image)) { + ImageContextMap::iterator it = imageContextMap.find(image); + + if (it != imageContextMap.end()) { + + kdDebug(41001) << "Sharing image context from map\n"; + + KisOpenGLImageContextSP context = (*it).second; + context->setMonitorProfile(monitorProfile); + + return context; + } else { + KisOpenGLImageContext *imageContext = new KisOpenGLImageContext(image, monitorProfile); + imageContextMap[image] = imageContext; + + kdDebug(41001) << "Added shareable context to map\n"; + + return imageContext; + } + } else { + kdDebug(41001) << "Creating non-shareable image context\n"; + + return new KisOpenGLImageContext(image, monitorProfile); + } +} + +bool KisOpenGLImageContext::imageCanShareImageContext(KisImageSP image) +{ + if (image->colorSpace()->hasHighDynamicRange()) { + //XXX: and we don't have shaders... + return false; + } else { + return true; + } +} + +TQGLWidget *KisOpenGLImageContext::sharedContextWidget() const +{ + return SharedContextWidget; +} + +void KisOpenGLImageContext::updateImageTextureTiles(const TQRect& rect) +{ + //kdDebug() << "updateImageTextureTiles " << rect << endl; + + TQRect updateRect = rect & m_image->bounds(); + + if (!updateRect.isEmpty()) { + + SharedContextWidget->makeCurrent(); + + int firstColumn = updateRect.left() / m_imageTextureTileWidth; + int lastColumn = updateRect.right() / m_imageTextureTileWidth; + int firstRow = updateRect.top() / m_imageTextureTileHeight; + int lastRow = updateRect.bottom() / m_imageTextureTileHeight; + + for (int column = firstColumn; column <= lastColumn; column++) { + for (int row = firstRow; row <= lastRow; row++) { + + TQRect tileRect(column * m_imageTextureTileWidth, row * m_imageTextureTileHeight, + m_imageTextureTileWidth, m_imageTextureTileHeight); + + TQRect tileUpdateRect = tileRect & updateRect; + + glBindTexture(GL_TEXTURE_2D, imageTextureTile(tileRect.x(), tileRect.y())); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);//GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + TQImage tileUpdateImage = m_image->convertToTQImage(tileUpdateRect.left(), tileUpdateRect.top(), + tileUpdateRect.right(), tileUpdateRect.bottom(), + m_monitorProfile, m_exposure); + + if (m_displaySelection) { + if (m_image->activeLayer() != 0) { + m_image->activeLayer()->paintSelection(tileUpdateImage, + tileUpdateRect.x(), tileUpdateRect.y(), + tileUpdateRect.width(), tileUpdateRect.height()); + } + } + + if (tileUpdateRect.width() == m_imageTextureTileWidth && tileUpdateRect.height() == m_imageTextureTileHeight) { + + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, m_imageTextureTileWidth, m_imageTextureTileHeight, 0, + GL_BGRA, GL_UNSIGNED_BYTE, tileUpdateImage.bits()); + } else { + int xOffset = tileUpdateRect.x() - tileRect.x(); + int yOffset = tileUpdateRect.y() - tileRect.y(); + + glTexSubImage2D(GL_TEXTURE_2D, 0, xOffset, yOffset, tileUpdateRect.width(), tileUpdateRect.height(), + GL_BGRA, GL_UNSIGNED_BYTE, tileUpdateImage.bits()); + } + + GLenum error = glGetError (); + + if (error != GL_NO_ERROR) + { + kdDebug(41001) << "Error loading texture: " << endl; + } + } + } + } +} + +KisColorSpace* KisOpenGLImageContext::textureColorSpaceForImageColorSpace(KisColorSpace */*imageColorSpace*/) +{ + return KisMetaRegistry::instance()->csRegistry()->getColorSpace(KisID("RGBA", ""), ""); +} + +void KisOpenGLImageContext::setMonitorProfile(KisProfile *monitorProfile) +{ + if (monitorProfile != m_monitorProfile) { + m_monitorProfile = monitorProfile; + generateBackgroundTexture(); + updateImageTextureTiles(m_image->bounds()); + } +} + +void KisOpenGLImageContext::setHDRExposure(float exposure) +{ + if (exposure != m_exposure) { + m_exposure = exposure; + + if (m_image->colorSpace()->hasHighDynamicRange()) { + //XXX: and we are not using shaders... + updateImageTextureTiles(m_image->bounds()); + } + } +} + +void KisOpenGLImageContext::generateBackgroundTexture() +{ + SharedContextWidget->makeCurrent(); + + glBindTexture(GL_TEXTURE_2D, m_backgroundTexture); + + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT); + + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + TQImage backgroundImage = m_image->background()->patternTile(); + + // XXX: temp. + Q_ASSERT(backgroundImage.width() == BACKGROUND_TEXTURE_WIDTH); + Q_ASSERT(backgroundImage.height() == BACKGROUND_TEXTURE_HEIGHT); + + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, BACKGROUND_TEXTURE_WIDTH, BACKGROUND_TEXTURE_HEIGHT, 0, + GL_BGRA, GL_UNSIGNED_BYTE, backgroundImage.bits()); +} + +GLuint KisOpenGLImageContext::backgroundTexture() const +{ + return m_backgroundTexture; +} + +int KisOpenGLImageContext::imageTextureTileIndex(int x, int y) const +{ + int column = x / m_imageTextureTileWidth; + int row = y / m_imageTextureTileHeight; + + return column + (row * m_numImageTextureTileColumns); +} + +GLuint KisOpenGLImageContext::imageTextureTile(int pixelX, int pixelY) const +{ + TQ_INT32 textureTileIndex = imageTextureTileIndex(pixelX, pixelY); + + textureTileIndex = CLAMP(textureTileIndex, 0, ((TQ_INT32)m_imageTextureTiles.count()) - 1); + + return m_imageTextureTiles[textureTileIndex]; +} + +int KisOpenGLImageContext::imageTextureTileWidth() const +{ + return m_imageTextureTileWidth; +} + +int KisOpenGLImageContext::imageTextureTileHeight() const +{ + return m_imageTextureTileHeight; +} + +void KisOpenGLImageContext::createImageTextureTiles() +{ + SharedContextWidget->makeCurrent(); + + destroyImageTextureTiles(); + + m_numImageTextureTileColumns = (m_image->width() + m_imageTextureTileWidth - 1) / m_imageTextureTileWidth; + int numImageTextureTileRows = (m_image->height() + m_imageTextureTileHeight - 1) / m_imageTextureTileHeight; + int numImageTextureTiles = m_numImageTextureTileColumns * numImageTextureTileRows; + + m_imageTextureTiles.resize(numImageTextureTiles); + glGenTextures(numImageTextureTiles, &(m_imageTextureTiles[0])); + + //XXX: will be float/half with shaders + #define RGBA_BYTES_PER_PIXEL 4 + + TQByteArray emptyTilePixelData(m_imageTextureTileWidth * m_imageTextureTileHeight * RGBA_BYTES_PER_PIXEL); + emptyTilePixelData.fill(0); + + for (int tileIndex = 0; tileIndex < numImageTextureTiles; ++tileIndex) { + + glBindTexture(GL_TEXTURE_2D, m_imageTextureTiles[tileIndex]); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); + + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, m_imageTextureTileWidth, m_imageTextureTileHeight, 0, + GL_BGRA, GL_UNSIGNED_BYTE, &emptyTilePixelData[0]); + } +} + +void KisOpenGLImageContext::destroyImageTextureTiles() +{ + if (!m_imageTextureTiles.empty()) { + SharedContextWidget->makeCurrent(); + glDeleteTextures(m_imageTextureTiles.count(), &(m_imageTextureTiles[0])); + m_imageTextureTiles.clear(); + } +} + +void KisOpenGLImageContext::update(const TQRect& imageRect) +{ + updateImageTextureTiles(imageRect); +} + +void KisOpenGLImageContext::setSelectionDisplayEnabled(bool enable) +{ + m_displaySelection = enable; +} + +void KisOpenGLImageContext::slotImageUpdated(TQRect rc) +{ + TQRect r = rc & m_image->bounds(); + + updateImageTextureTiles(r); + emit sigImageUpdated(r); +} + +void KisOpenGLImageContext::slotImageSizeChanged(TQ_INT32 w, TQ_INT32 h) +{ + createImageTextureTiles(); + updateImageTextureTiles(m_image->bounds()); + + emit sigSizeChanged(w, h); +} + +#include "kis_opengl_image_context.moc" + +#endif // HAVE_GL + |