bool
GLComputeEvaluator::_PatchKernel::Compile(BufferDescriptor const &srcDesc,
BufferDescriptor const &dstDesc,
BufferDescriptor const &duDesc,
BufferDescriptor const &dvDesc,
int workGroupSize) {
// create stencil kernel
if (program) {
glDeleteProgram(program);
}
bool derivatives = (duDesc.length > 0 || dvDesc.length > 0);
const char *kernelDef = derivatives
? "#define OPENSUBDIV_GLSL_COMPUTE_KERNEL_EVAL_PATCHES\n"
"#define OPENSUBDIV_GLSL_COMPUTE_USE_DERIVATIVES\n"
: "#define OPENSUBDIV_GLSL_COMPUTE_KERNEL_EVAL_PATCHES\n";
if (program) {
glDeleteProgram(program);
}
program = compileKernel(srcDesc, dstDesc, duDesc, dvDesc, kernelDef,
workGroupSize);
if (program == 0) return false;
// cache uniform locations
uniformSrcOffset = glGetUniformLocation(program, "srcOffset");
uniformDstOffset = glGetUniformLocation(program, "dstOffset");
uniformPatchArray = glGetUniformLocation(program, "patchArray");
uniformDuDesc = glGetUniformLocation(program, "duDesc");
uniformDvDesc = glGetUniformLocation(program, "dvDesc");
return true;
}
VolumeRaycasterCL::VolumeRaycasterCL()
: KernelOwner()
, workGroupSize_(size2_t(8, 8))
, useGLSharing_(true)
, outputOffset_(0)
, outputSize_(1)
, camera_(nullptr)
, samplingRate_(2.f)
, background_(nullptr)
, defaultBackground_(uvec2(1), DataVec4UInt8::get())
, lightStruct_(sizeof(utilcl::LightParameters), DataUInt8::get(), BufferUsage::STATIC, nullptr,
CL_MEM_READ_ONLY)
, kernel_(nullptr) {
light_.ambientColor = vec4(1.f);
light_.diffuseColor = vec4(1.f);
light_.specularColor = vec4(1.f);
light_.specularExponent = 110.f;
light_.position = vec4(0.7f);
light_.shadingMode = ShadingMode::Phong;
compileKernel();
}
void VolumeRaycasterCL::setLightingProperties(ShadingMode::Modes mode, const vec3& lightPosition,
const vec3& ambientColor, const vec3& diffuseColor,
const vec3& specularColor, float specularExponent) {
light_.position = vec4(lightPosition, 1.f);
light_.ambientColor = vec4(ambientColor, 1.f);
light_.diffuseColor = vec4(diffuseColor, 1.f);
light_.specularColor = vec4(specularColor, 1.f);
light_.specularExponent = specularExponent;
if (mode != light_.shadingMode) {
light_.shadingMode = mode;
compileKernel();
}
if (kernel_) {
try {
// Update data before returning it
lightStruct_.upload(&light_, sizeof(utilcl::LightParameters));
kernel_->setArg(8, lightStruct_);
} catch (cl::Error& err) {
LogError(getCLErrorString(err));
}
}
}
