void KisCanvas2::createCanvas()
{
KisConfig cfg;
slotSetDisplayProfile( KoColorSpaceRegistry::instance()->profileByName(cfg.monitorProfile()) );
if (cfg.useOpenGL()) {
#ifdef HAVE_OPENGL
createOpenGLCanvas();
#else
warnKrita << "OpenGL requested while its not available, starting qpainter canvas";
createQPainterCanvas();
#endif
} else {
createQPainterCanvas();
}
}
void OcioDisplayFilter::updateProcessor()
{
if (!config) {
return;
}
if (!displayDevice) {
displayDevice = config->getDefaultDisplay();
}
if (!view) {
view = config->getDefaultView(displayDevice);
}
if (!inputColorSpaceName) {
inputColorSpaceName = config->getColorSpaceNameByIndex(0);
}
OCIO::DisplayTransformRcPtr transform = OCIO::DisplayTransform::Create();
transform->setInputColorSpaceName(inputColorSpaceName);
transform->setDisplay(displayDevice);
transform->setView(view);
OCIO::GroupTransformRcPtr approximateTransform = OCIO::GroupTransform::Create();
// fstop exposure control -- not sure how that translates to our exposure
{
float exposureGain = powf(2.0f, exposure);
const qreal minRange = 0.001;
if (qAbs(blackPoint - whitePoint) < minRange) {
whitePoint = blackPoint + minRange;
}
const float oldMin[] = { blackPoint, blackPoint, blackPoint, 0.0f };
const float oldMax[] = { whitePoint, whitePoint, whitePoint, 1.0f };
const float newMin[] = { 0.0f, 0.0f, 0.0f, 0.0f };
const float newMax[] = { exposureGain, exposureGain, exposureGain, 1.0f };
float m44[16];
float offset4[4];
OCIO::MatrixTransform::Fit(m44, offset4, oldMin, oldMax, newMin, newMax);
OCIO::MatrixTransformRcPtr mtx = OCIO::MatrixTransform::Create();
mtx->setValue(m44, offset4);
transform->setLinearCC(mtx);
// approximation (no color correction);
approximateTransform->push_back(mtx);
}
// channel swizzle
{
int channelHot[4];
switch (swizzle) {
case LUMINANCE:
channelHot[0] = 1;
channelHot[1] = 1;
channelHot[2] = 1;
channelHot[3] = 0;
break;
case RGBA:
channelHot[0] = 1;
channelHot[1] = 1;
channelHot[2] = 1;
channelHot[3] = 1;
break;
case R:
channelHot[0] = 1;
channelHot[1] = 0;
channelHot[2] = 0;
channelHot[3] = 0;
break;
case G:
channelHot[0] = 0;
channelHot[1] = 1;
channelHot[2] = 0;
channelHot[3] = 0;
break;
case B:
channelHot[0] = 0;
channelHot[1] = 0;
channelHot[2] = 1;
channelHot[3] = 0;
break;
case A:
channelHot[0] = 0;
channelHot[1] = 0;
channelHot[2] = 0;
channelHot[3] = 1;
default:
;
}
float lumacoef[3];
config->getDefaultLumaCoefs(lumacoef);
float m44[16];
float offset[4];
OCIO::MatrixTransform::View(m44, offset, channelHot, lumacoef);
OCIO::MatrixTransformRcPtr swizzle = OCIO::MatrixTransform::Create();
swizzle->setValue(m44, offset);
transform->setChannelView(swizzle);
}
// Post-display transform gamma
{
float exponent = 1.0f/std::max(1e-6f, static_cast<float>(gamma));
const float exponent4f[] = { exponent, exponent, exponent, exponent };
OCIO::ExponentTransformRcPtr expTransform = OCIO::ExponentTransform::Create();
expTransform->setValue(exponent4f);
transform->setDisplayCC(expTransform);
// approximation (no color correction);
approximateTransform->push_back(expTransform);
}
m_processor = config->getProcessor(transform);
m_forwardApproximationProcessor = config->getProcessor(approximateTransform, OCIO::TRANSFORM_DIR_FORWARD);
try {
m_revereseApproximationProcessor = config->getProcessor(approximateTransform, OCIO::TRANSFORM_DIR_INVERSE);
} catch (...) {
warnKrita << "OCIO inverted matrix does not exist!";
//m_revereseApproximationProcessor;
}
#ifdef HAVE_OPENGL
// check whether we are allowed to use shaders -- though that should
// work for everyone these days
KisConfig cfg;
if (!cfg.useOpenGL()) return;
QOpenGLFunctions glFuncs(QOpenGLContext::currentContext());
QOpenGLFunctions_3_2_Core *glFuncs3 = QOpenGLContext::currentContext()->versionFunctions<QOpenGLFunctions_3_2_Core>();
const int lut3DEdgeSize = cfg.ocioLutEdgeSize();
if (m_lut3d.size() == 0) {
//dbgKrita << "generating lut";
glFuncs.glGenTextures(1, &m_lut3dTexID);
int num3Dentries = 3 * lut3DEdgeSize * lut3DEdgeSize * lut3DEdgeSize;
m_lut3d.fill(0.0, num3Dentries);
glFuncs.glActiveTexture(GL_TEXTURE1);
glFuncs.glBindTexture(GL_TEXTURE_3D, m_lut3dTexID);
glFuncs.glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glFuncs.glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glFuncs.glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
glFuncs.glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
glFuncs.glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE);
glFuncs3->glTexImage3D(GL_TEXTURE_3D, 0, GL_RGB16F_ARB,
lut3DEdgeSize, lut3DEdgeSize, lut3DEdgeSize,
0, GL_RGB, GL_FLOAT, &m_lut3d.constData()[0]);
}
// Step 1: Create a GPU Shader Description
OCIO::GpuShaderDesc shaderDesc;
shaderDesc.setLanguage(OCIO::GPU_LANGUAGE_GLSL_1_3);
shaderDesc.setFunctionName("OCIODisplay");
shaderDesc.setLut3DEdgeLen(lut3DEdgeSize);
// Step 2: Compute the 3D LUT
QString lut3dCacheID = QString::fromLatin1(m_processor->getGpuLut3DCacheID(shaderDesc));
if(lut3dCacheID != m_lut3dcacheid)
{
//dbgKrita << "Computing 3DLut " << m_lut3dcacheid;
m_lut3dcacheid = lut3dCacheID;
m_processor->getGpuLut3D(&m_lut3d[0], shaderDesc);
glFuncs.glBindTexture(GL_TEXTURE_3D, m_lut3dTexID);
glFuncs3->glTexSubImage3D(GL_TEXTURE_3D, 0,
0, 0, 0,
lut3DEdgeSize, lut3DEdgeSize, lut3DEdgeSize,
GL_RGB, GL_FLOAT, &m_lut3d[0]);
}
// Step 3: Generate the shader text
QString shaderCacheID = QString::fromLatin1(m_processor->getGpuShaderTextCacheID(shaderDesc));
if (m_program.isEmpty() || shaderCacheID != m_shadercacheid) {
//dbgKrita << "Computing Shader " << m_shadercacheid;
m_shadercacheid = shaderCacheID;
std::ostringstream os;
os << m_processor->getGpuShaderText(shaderDesc) << "\n";
m_program = QString::fromLatin1(os.str().c_str());
}
#endif
}