// The address returned here will only be valid until next time this function is called.
QGLEngineShaderProg *QGLEngineSharedShaders::findProgramInCache(const QGLEngineShaderProg &prog)
{
for (int i = 0; i < cachedPrograms.size(); ++i) {
QGLEngineShaderProg *cachedProg = cachedPrograms[i];
if (*cachedProg == prog) {
// Move the program to the top of the list as a poor-man's cache algo
cachedPrograms.move(i, 0);
return cachedProg;
}
}
QByteArray source;
source.append(qShaderSnippets[prog.mainFragShader]);
source.append(qShaderSnippets[prog.srcPixelFragShader]);
if (prog.srcPixelFragShader == CustomImageSrcFragmentShader)
source.append(prog.customStageSource);
if (prog.compositionFragShader)
source.append(qShaderSnippets[prog.compositionFragShader]);
if (prog.maskFragShader)
source.append(qShaderSnippets[prog.maskFragShader]);
QGLShader* fragShader = new QGLShader(QGLShader::Fragment, ctxGuard.context(), this);
fragShader->compileSourceCode(source);
source.clear();
source.append(qShaderSnippets[prog.mainVertexShader]);
source.append(qShaderSnippets[prog.positionVertexShader]);
QGLShader* vertexShader = new QGLShader(QGLShader::Vertex, ctxGuard.context(), this);
vertexShader->compileSourceCode(source);
#if defined(QT_DEBUG)
// Name the shaders for easier debugging
QByteArray description;
description.append("Fragment shader: main=");
description.append(snippetNameStr(prog.mainFragShader));
description.append(", srcPixel=");
description.append(snippetNameStr(prog.srcPixelFragShader));
if (prog.compositionFragShader) {
description.append(", composition=");
description.append(snippetNameStr(prog.compositionFragShader));
}
if (prog.maskFragShader) {
description.append(", mask=");
description.append(snippetNameStr(prog.maskFragShader));
}
fragShader->setObjectName(QString::fromLatin1(description));
description.clear();
description.append("Vertex shader: main=");
description.append(snippetNameStr(prog.mainVertexShader));
description.append(", position=");
description.append(snippetNameStr(prog.positionVertexShader));
vertexShader->setObjectName(QString::fromLatin1(description));
#endif
QGLEngineShaderProg* newProg = new QGLEngineShaderProg(prog);
// If the shader program's not found in the cache, create it now.
newProg->program = new QGLShaderProgram(ctxGuard.context(), this);
newProg->program->addShader(vertexShader);
newProg->program->addShader(fragShader);
// We have to bind the vertex attribute names before the program is linked:
newProg->program->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
if (newProg->useTextureCoords)
newProg->program->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
if (newProg->useOpacityAttribute)
newProg->program->bindAttributeLocation("opacityArray", QT_OPACITY_ATTR);
newProg->program->link();
if (!newProg->program->isLinked()) {
QLatin1String none("none");
QLatin1String br("\n");
QString error;
error = QLatin1String("Shader program failed to link,")
#if defined(QT_DEBUG)
+ br
+ QLatin1String(" Shaders Used:") + br
+ QLatin1String(" ") + vertexShader->objectName() + QLatin1String(": ") + br
+ QLatin1String(vertexShader->sourceCode()) + br
+ QLatin1String(" ") + fragShader->objectName() + QLatin1String(": ") + br
+ QLatin1String(fragShader->sourceCode()) + br
#endif
+ QLatin1String(" Error Log:\n")
+ QLatin1String(" ") + newProg->program->log();
qWarning() << error;
delete newProg; // Deletes the QGLShaderProgram in it's destructor
newProg = 0;
}
else {
if (cachedPrograms.count() > 30) {
// The cache is full, so delete the last 5 programs in the list.
// These programs will be least used, as a program us bumped to
// the top of the list when it's used.
for (int i = 0; i < 5; ++i) {
delete cachedPrograms.last();
cachedPrograms.removeLast();
}
}
cachedPrograms.insert(0, newProg);
}
return newProg;
}
// The address returned here will only be valid until next time this function is called.
// The program is return bound.
QGLEngineShaderProg *QGLEngineSharedShaders::findProgramInCache(const QGLEngineShaderProg &prog)
{
for (int i = 0; i < cachedPrograms.size(); ++i) {
QGLEngineShaderProg *cachedProg = cachedPrograms[i];
if (*cachedProg == prog) {
// Move the program to the top of the list as a poor-man's cache algo
cachedPrograms.move(i, 0);
cachedProg->program->bind();
return cachedProg;
}
}
QGLShader *vertexShader = 0;
QGLShader *fragShader = 0;
QGLEngineShaderProg *newProg = 0;
bool success = false;
do {
QByteArray source;
// Insert the custom stage before the srcPixel shader to work around an ATI driver bug
// where you cannot forward declare a function that takes a sampler as argument.
if (prog.srcPixelFragShader == CustomImageSrcFragmentShader)
source.append(prog.customStageSource);
source.append(qShaderSnippets[prog.mainFragShader]);
source.append(qShaderSnippets[prog.srcPixelFragShader]);
if (prog.compositionFragShader)
source.append(qShaderSnippets[prog.compositionFragShader]);
if (prog.maskFragShader)
source.append(qShaderSnippets[prog.maskFragShader]);
fragShader = new QGLShader(QGLShader::Fragment, ctxGuard.context(), this);
QByteArray description;
#if defined(QT_DEBUG)
// Name the shader for easier debugging
description.append("Fragment shader: main=");
description.append(snippetNameStr(prog.mainFragShader));
description.append(", srcPixel=");
description.append(snippetNameStr(prog.srcPixelFragShader));
if (prog.compositionFragShader) {
description.append(", composition=");
description.append(snippetNameStr(prog.compositionFragShader));
}
if (prog.maskFragShader) {
description.append(", mask=");
description.append(snippetNameStr(prog.maskFragShader));
}
fragShader->setObjectName(QString::fromLatin1(description));
#endif
if (!fragShader->compileSourceCode(source)) {
qWarning() << "Warning:" << description << "failed to compile!";
break;
}
source.clear();
source.append(qShaderSnippets[prog.mainVertexShader]);
source.append(qShaderSnippets[prog.positionVertexShader]);
vertexShader = new QGLShader(QGLShader::Vertex, ctxGuard.context(), this);
#if defined(QT_DEBUG)
// Name the shader for easier debugging
description.clear();
description.append("Vertex shader: main=");
description.append(snippetNameStr(prog.mainVertexShader));
description.append(", position=");
description.append(snippetNameStr(prog.positionVertexShader));
vertexShader->setObjectName(QString::fromLatin1(description));
#endif
if (!vertexShader->compileSourceCode(source)) {
qWarning() << "Warning:" << description << "failed to compile!";
break;
}
newProg = new QGLEngineShaderProg(prog);
// If the shader program's not found in the cache, create it now.
newProg->program = new QGLShaderProgram(ctxGuard.context(), this);
newProg->program->addShader(vertexShader);
newProg->program->addShader(fragShader);
// We have to bind the vertex attribute names before the program is linked:
newProg->program->bindAttributeLocation("vertexCoordsArray", QT_VERTEX_COORDS_ATTR);
if (newProg->useTextureCoords)
newProg->program->bindAttributeLocation("textureCoordArray", QT_TEXTURE_COORDS_ATTR);
if (newProg->useOpacityAttribute)
newProg->program->bindAttributeLocation("opacityArray", QT_OPACITY_ATTR);
if (newProg->usePmvMatrixAttribute) {
newProg->program->bindAttributeLocation("pmvMatrix1", QT_PMV_MATRIX_1_ATTR);
newProg->program->bindAttributeLocation("pmvMatrix2", QT_PMV_MATRIX_2_ATTR);
newProg->program->bindAttributeLocation("pmvMatrix3", QT_PMV_MATRIX_3_ATTR);
}
newProg->program->link();
if (!newProg->program->isLinked()) {
QLatin1String none("none");
QLatin1String br("\n");
QString error;
error = QLatin1String("Shader program failed to link,")
#if defined(QT_DEBUG)
+ br
+ QLatin1String(" Shaders Used:") + br
+ QLatin1String(" ") + vertexShader->objectName() + QLatin1String(": ") + br
+ QLatin1String(vertexShader->sourceCode()) + br
+ QLatin1String(" ") + fragShader->objectName() + QLatin1String(": ") + br
+ QLatin1String(fragShader->sourceCode()) + br
#endif
+ QLatin1String(" Error Log:\n")
+ QLatin1String(" ") + newProg->program->log();
qWarning() << error;
break;
}
newProg->program->bind();
if (newProg->maskFragShader != QGLEngineSharedShaders::NoMaskFragmentShader) {
GLuint location = newProg->program->uniformLocation("maskTexture");
newProg->program->setUniformValue(location, QT_MASK_TEXTURE_UNIT);
}
if (cachedPrograms.count() > 30) {
// The cache is full, so delete the last 5 programs in the list.
// These programs will be least used, as a program us bumped to
// the top of the list when it's used.
for (int i = 0; i < 5; ++i) {
delete cachedPrograms.last();
cachedPrograms.removeLast();
}
}
cachedPrograms.insert(0, newProg);
success = true;
} while (false);
// Clean up everything if we weren't successful
if (!success) {
if (newProg) {
delete newProg; // Also deletes the QGLShaderProgram which in turn deletes the QGLShaders
newProg = 0;
}
else {
if (vertexShader)
delete vertexShader;
if (fragShader)
delete fragShader;
}
}
return newProg;
}