sources/third_party/shaderc/libshaderc_util/src/resources.cc

// Copyright 2015 The Shaderc Authors. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "libshaderc_util/resources.h"

#include "glslang/Include/ResourceLimits.h"

namespace shaderc_util {

// These numbers come from the OpenGL 4.4 core profile specification Chapter 23
// unless otherwise specified.
const TBuiltInResource kDefaultTBuiltInResource = {
    /*.maxLights = */ 8,         // From OpenGL 3.0 table 6.46.
    /*.maxClipPlanes = */ 6,     // From OpenGL 3.0 table 6.46.
    /*.maxTextureUnits = */ 2,   // From OpenGL 3.0 table 6.50.
    /*.maxTextureCoords = */ 8,  // From OpenGL 3.0 table 6.50.
    /*.maxVertexAttribs = */ 16,
    /*.maxVertexUniformComponents = */ 4096,
    /*.maxVaryingFloats = */ 60,  // From OpenGLES 3.1 table 6.44.
    /*.maxVertexTextureImageUnits = */ 16,
    /*.maxCombinedTextureImageUnits = */ 80,
    /*.maxTextureImageUnits = */ 16,
    /*.maxFragmentUniformComponents = */ 1024,

    // glslang has 32 maxDrawBuffers.
    // Pixel phone Vulkan driver in Android N has 8
    // maxFragmentOutputAttachments.
    /*.maxDrawBuffers = */ 8, 

    /*.maxVertexUniformVectors = */ 256,
    /*.maxVaryingVectors = */ 15,  // From OpenGLES 3.1 table 6.44.
    /*.maxFragmentUniformVectors = */ 256,
    /*.maxVertexOutputVectors = */ 16,   // maxVertexOutputComponents / 4
    /*.maxFragmentInputVectors = */ 15,  // maxFragmentInputComponents / 4
    /*.minProgramTexelOffset = */ -8,
    /*.maxProgramTexelOffset = */ 7,
    /*.maxClipDistances = */ 8,
    /*.maxComputeWorkGroupCountX = */ 65535,
    /*.maxComputeWorkGroupCountY = */ 65535,
    /*.maxComputeWorkGroupCountZ = */ 65535,
    /*.maxComputeWorkGroupSizeX = */ 1024,
    /*.maxComputeWorkGroupSizeX = */ 1024,
    /*.maxComputeWorkGroupSizeZ = */ 64,
    /*.maxComputeUniformComponents = */ 512,
    /*.maxComputeTextureImageUnits = */ 16,
    /*.maxComputeImageUniforms = */ 8,
    /*.maxComputeAtomicCounters = */ 8,
    /*.maxComputeAtomicCounterBuffers = */ 1,  // From OpenGLES 3.1 Table 6.43
    /*.maxVaryingComponents = */ 60,
    /*.maxVertexOutputComponents = */ 64,
    /*.maxGeometryInputComponents = */ 64,
    /*.maxGeometryOutputComponents = */ 128,
    /*.maxFragmentInputComponents = */ 128,
    /*.maxImageUnits = */ 8,  // This does not seem to be defined anywhere,
                              // set to ImageUnits.
    /*.maxCombinedImageUnitsAndFragmentOutputs = */ 8,
    /*.maxCombinedShaderOutputResources = */ 8,
    /*.maxImageSamples = */ 0,
    /*.maxVertexImageUniforms = */ 0,
    /*.maxTessControlImageUniforms = */ 0,
    /*.maxTessEvaluationImageUniforms = */ 0,
    /*.maxGeometryImageUniforms = */ 0,
    /*.maxFragmentImageUniforms = */ 8,
    /*.maxCombinedImageUniforms = */ 8,
    /*.maxGeometryTextureImageUnits = */ 16,
    /*.maxGeometryOutputVertices = */ 256,
    /*.maxGeometryTotalOutputComponents = */ 1024,
    /*.maxGeometryUniformComponents = */ 512,
    /*.maxGeometryVaryingComponents = */ 60,  // Does not seem to be defined
                                              // anywhere, set equal to
                                              // maxVaryingComponents.
    /*.maxTessControlInputComponents = */ 128,
    /*.maxTessControlOutputComponents = */ 128,
    /*.maxTessControlTextureImageUnits = */ 16,
    /*.maxTessControlUniformComponents = */ 1024,
    /*.maxTessControlTotalOutputComponents = */ 4096,
    /*.maxTessEvaluationInputComponents = */ 128,
    /*.maxTessEvaluationOutputComponents = */ 128,
    /*.maxTessEvaluationTextureImageUnits = */ 16,
    /*.maxTessEvaluationUniformComponents = */ 1024,
    /*.maxTessPatchComponents = */ 120,
    /*.maxPatchVertices = */ 32,
    /*.maxTessGenLevel = */ 64,
    /*.maxViewports = */ 16,
    /*.maxVertexAtomicCounters = */ 0,
    /*.maxTessControlAtomicCounters = */ 0,
    /*.maxTessEvaluationAtomicCounters = */ 0,
    /*.maxGeometryAtomicCounters = */ 0,
    /*.maxFragmentAtomicCounters = */ 8,
    /*.maxCombinedAtomicCounters = */ 8,
    /*.maxAtomicCounterBindings = */ 1,
    /*.maxVertexAtomicCounterBuffers = */ 0,  // From OpenGLES 3.1 Table 6.41.

    // ARB_shader_atomic_counters.
    /*.maxTessControlAtomicCounterBuffers = */ 0,
    /*.maxTessEvaluationAtomicCounterBuffers = */ 0,
    /*.maxGeometryAtomicCounterBuffers = */ 0,
    // /ARB_shader_atomic_counters.

    /*.maxFragmentAtomicCounterBuffers = */ 0,  // From OpenGLES 3.1 Table 6.43.
    /*.maxCombinedAtomicCounterBuffers = */ 1,
    /*.maxAtomicCounterBufferSize = */ 32,
    /*.maxTransformFeedbackBuffers = */ 4,
    /*.maxTransformFeedbackInterleavedComponents = */ 64,
    /*.maxCullDistances = */ 8,                 // ARB_cull_distance.
    /*.maxCombinedClipAndCullDistances = */ 8,  // ARB_cull_distance.
    /*.maxSamples = */ 4,
    /* .maxMeshOutputVerticesNV = */ 256,
    /* .maxMeshOutputPrimitivesNV = */ 512,
    /* .maxMeshWorkGroupSizeX_NV = */ 32,
    /* .maxMeshWorkGroupSizeY_NV = */ 1,
    /* .maxMeshWorkGroupSizeZ_NV = */ 1,
    /* .maxTaskWorkGroupSizeX_NV = */ 32,
    /* .maxTaskWorkGroupSizeY_NV = */ 1,
    /* .maxTaskWorkGroupSizeZ_NV = */ 1,
    /* .maxMeshViewCountNV = */ 4,
    /* .maxDualSourceDrawBuffersEXT = */ 1,
    // This is the glslang TLimits structure.
    // It defines whether or not the following features are enabled.
    // We want them to all be enabled.
    /*.limits = */ {
        /*.nonInductiveForLoops = */ 1,
        /*.whileLoops = */ 1,
        /*.doWhileLoops = */ 1,
        /*.generalUniformIndexing = */ 1,
        /*.generalAttributeMatrixVectorIndexing = */ 1,
        /*.generalVaryingIndexing = */ 1,
        /*.generalSamplerIndexing = */ 1,
        /*.generalVariableIndexing = */ 1,
        /*.generalConstantMatrixVectorIndexing = */ 1,
    }};

}  // namespace shaderc_util