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koffice/krita/ui/kis_opengl_image_context.cc

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/*
* 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;
QGLWidget *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 QGLWidget(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 = QMIN(PREFERRED_IMAGE_TEXTURE_WIDTH, max_texture_size);
m_imageTextureTileHeight = QMIN(PREFERRED_IMAGE_TEXTURE_HEIGHT, max_texture_size);
createImageTextureTiles();
connect(m_image, SIGNAL(sigImageUpdated(QRect)),
SLOT(slotImageUpdated(QRect)));
connect(m_image, SIGNAL(sigSizeChanged(Q_INT32, Q_INT32)),
SLOT(slotImageSizeChanged(Q_INT32, Q_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;
}
}
QGLWidget *KisOpenGLImageContext::sharedContextWidget() const
{
return SharedContextWidget;
}
void KisOpenGLImageContext::updateImageTextureTiles(const QRect& rect)
{
//kdDebug() << "updateImageTextureTiles " << rect << endl;
QRect 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++) {
QRect tileRect(column * m_imageTextureTileWidth, row * m_imageTextureTileHeight,
m_imageTextureTileWidth, m_imageTextureTileHeight);
QRect 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);
QImage tileUpdateImage = m_image->convertToQImage(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);
QImage 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
{
Q_INT32 textureTileIndex = imageTextureTileIndex(pixelX, pixelY);
textureTileIndex = CLAMP(textureTileIndex, 0, ((Q_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
QByteArray 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 QRect& imageRect)
{
updateImageTextureTiles(imageRect);
}
void KisOpenGLImageContext::setSelectionDisplayEnabled(bool enable)
{
m_displaySelection = enable;
}
void KisOpenGLImageContext::slotImageUpdated(QRect rc)
{
QRect r = rc & m_image->bounds();
updateImageTextureTiles(r);
emit sigImageUpdated(r);
}
void KisOpenGLImageContext::slotImageSizeChanged(Q_INT32 w, Q_INT32 h)
{
createImageTextureTiles();
updateImageTextureTiles(m_image->bounds());
emit sigSizeChanged(w, h);
}
#include "kis_opengl_image_context.moc"
#endif // HAVE_GL