void ShaderEffectItem::renderEffect(QPainter *painter, const QMatrix4x4 &matrix)
{
if (!painter || !painter->device())
return;
if (!m_program.isLinked() || m_program_dirty)
updateShaderProgram();
m_program.bind();
QMatrix4x4 combinedMatrix;
combinedMatrix.scale(2.0 / painter->device()->width(), -2.0 / painter->device()->height(), 1.0);
combinedMatrix.translate(-painter->device()->width() / 2.0, -painter->device()->height() / 2.0 );
combinedMatrix *= matrix;
updateEffectState(combinedMatrix);
for (int i = 0; i < m_attributeNames.size(); ++i) {
m_program.enableAttributeArray(m_geometry.attributes()[i].position);
}
bindGeometry();
// Optimization, disable depth test when we know we don't need it.
if (m_defaultVertexShader) {
glDepthMask(false);
glDisable(GL_DEPTH_TEST);
} else {
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_GREATER);
glDepthMask(true);
#if defined(QT_OPENGL_ES)
glClearDepthf(0);
#else
glClearDepth(0);
#endif
glClearColor(0, 0, 0, 0);
glClear(GL_DEPTH_BUFFER_BIT);
}
if (m_blending){
glEnable(GL_BLEND);
glBlendFunc (GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
} else {
glDisable(GL_BLEND);
}
if (m_geometry.indexCount())
glDrawElements(m_geometry.drawingMode(), m_geometry.indexCount(), m_geometry.indexType(), m_geometry.indexData());
else
glDrawArrays(m_geometry.drawingMode(), 0, m_geometry.vertexCount());
glDepthMask(false);
glDisable(GL_DEPTH_TEST);
for (int i = 0; i < m_attributeNames.size(); ++i)
m_program.disableAttributeArray(m_geometry.attributes()[i].position);
}
void ShaderEffectItem::renderEffect(QPainter *painter, const QMatrix4x4 &matrix)
{
if (!painter || !painter->device())
return;
if (!m_program || !m_program->programId()) {
// Deleted due to deactivation, to save GPU memory,
// or invalidated due to GL context change.
delete m_program;
if (QGLContext::currentContext())
m_program = new QGLShaderProgram(this);
if (!m_program)
qWarning() << "ShaderEffectItem::renderEffect - Creating QGLShaderProgram failed!";
}
if (!m_program)
return;
if (!m_program->isLinked() || m_program_dirty)
updateShaderProgram();
m_program->bind();
QMatrix4x4 combinedMatrix;
combinedMatrix.scale(2.0 / painter->device()->width(), -2.0 / painter->device()->height(), 1.0);
combinedMatrix.translate(-painter->device()->width() / 2.0, -painter->device()->height() / 2.0 );
combinedMatrix *= matrix;
updateEffectState(combinedMatrix);
for (int i = 0; i < m_attributeNames.size(); ++i) {
m_program->enableAttributeArray(m_geometry.attributes()[i].position);
}
bindGeometry();
// Optimization, disable depth test when we know we don't need it.
if (m_defaultVertexShader) {
glDepthMask(false);
glDisable(GL_DEPTH_TEST);
} else {
glEnable(GL_DEPTH_TEST);
glDepthFunc(GL_GREATER);
glDepthMask(true);
#if defined(QT_OPENGL_ES)
glClearDepthf(0);
#else
glClearDepth(0);
#endif
glClearColor(0, 0, 0, 0);
glClear(GL_DEPTH_BUFFER_BIT);
}
if (m_blending) {
glEnable(GL_BLEND);
glBlendFunc (GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
} else {
glDisable(GL_BLEND);
}
if (m_geometry.indexCount())
glDrawElements(m_geometry.drawingMode(), m_geometry.indexCount(), m_geometry.indexType(), m_geometry.indexData());
else
glDrawArrays(m_geometry.drawingMode(), 0, m_geometry.vertexCount());
glDepthMask(false);
glDisable(GL_DEPTH_TEST);
for (int i = 0; i < m_attributeNames.size(); ++i)
m_program->disableAttributeArray(m_geometry.attributes()[i].position);
}
