Compiler::Compiler(rx::GLImplFactory *implFactory, const ContextState &state)
: mImplementation(implFactory->createCompiler()),
mSpec(SelectShaderSpec(state.getClientMajorVersion(), state.getClientMinorVersion())),
mOutputType(mImplementation->getTranslatorOutputType()),
mResources(),
mFragmentCompiler(nullptr),
mVertexCompiler(nullptr)
{
ASSERT(state.getClientMajorVersion() == 2 || state.getClientMajorVersion() == 3);
const gl::Caps &caps = state.getCaps();
const gl::Extensions &extensions = state.getExtensions();
ShInitBuiltInResources(&mResources);
mResources.MaxVertexAttribs = caps.maxVertexAttributes;
mResources.MaxVertexUniformVectors = caps.maxVertexUniformVectors;
mResources.MaxVaryingVectors = caps.maxVaryingVectors;
mResources.MaxVertexTextureImageUnits = caps.maxVertexTextureImageUnits;
mResources.MaxCombinedTextureImageUnits = caps.maxCombinedTextureImageUnits;
mResources.MaxTextureImageUnits = caps.maxTextureImageUnits;
mResources.MaxFragmentUniformVectors = caps.maxFragmentUniformVectors;
mResources.MaxDrawBuffers = caps.maxDrawBuffers;
mResources.OES_standard_derivatives = extensions.standardDerivatives;
mResources.EXT_draw_buffers = extensions.drawBuffers;
mResources.EXT_shader_texture_lod = extensions.shaderTextureLOD;
mResources.OES_EGL_image_external = extensions.eglImageExternal;
mResources.OES_EGL_image_external_essl3 = extensions.eglImageExternalEssl3;
mResources.NV_EGL_stream_consumer_external = extensions.eglStreamConsumerExternal;
// TODO: use shader precision caps to determine if high precision is supported?
mResources.FragmentPrecisionHigh = 1;
mResources.EXT_frag_depth = extensions.fragDepth;
// GLSL ES 3.0 constants
mResources.MaxVertexOutputVectors = caps.maxVertexOutputComponents / 4;
mResources.MaxFragmentInputVectors = caps.maxFragmentInputComponents / 4;
mResources.MinProgramTexelOffset = caps.minProgramTexelOffset;
mResources.MaxProgramTexelOffset = caps.maxProgramTexelOffset;
}
