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// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_FORMATS_GLES_H_
#define FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_FORMATS_GLES_H_
#include <optional>
#include "flutter/fml/logging.h"
#include "flutter/fml/macros.h"
#include "impeller/core/formats.h"
#include "impeller/core/shader_types.h"
#include "impeller/renderer/backend/gles/gles.h"
namespace impeller {
constexpr GLenum ToMode(PrimitiveType primitive_type) {
switch (primitive_type) {
case PrimitiveType::kTriangle:
return GL_TRIANGLES;
case PrimitiveType::kTriangleStrip:
return GL_TRIANGLE_STRIP;
case PrimitiveType::kLine:
return GL_LINES;
case PrimitiveType::kLineStrip:
return GL_LINE_STRIP;
case PrimitiveType::kPoint:
return GL_POINTS;
}
FML_UNREACHABLE();
}
constexpr GLenum ToIndexType(IndexType type) {
switch (type) {
case IndexType::kUnknown:
case IndexType::kNone:
FML_UNREACHABLE();
case IndexType::k16bit:
return GL_UNSIGNED_SHORT;
case IndexType::k32bit:
return GL_UNSIGNED_INT;
}
FML_UNREACHABLE();
}
constexpr GLenum ToStencilOp(StencilOperation op) {
switch (op) {
case StencilOperation::kKeep:
return GL_KEEP;
case StencilOperation::kZero:
return GL_ZERO;
case StencilOperation::kSetToReferenceValue:
return GL_REPLACE;
case StencilOperation::kIncrementClamp:
return GL_INCR;
case StencilOperation::kDecrementClamp:
return GL_DECR;
case StencilOperation::kInvert:
return GL_INVERT;
case StencilOperation::kIncrementWrap:
return GL_INCR_WRAP;
case StencilOperation::kDecrementWrap:
return GL_DECR_WRAP;
}
FML_UNREACHABLE();
}
constexpr GLenum ToCompareFunction(CompareFunction func) {
switch (func) {
case CompareFunction::kNever:
return GL_NEVER;
case CompareFunction::kAlways:
return GL_ALWAYS;
case CompareFunction::kLess:
return GL_LESS;
case CompareFunction::kEqual:
return GL_EQUAL;
case CompareFunction::kLessEqual:
return GL_LEQUAL;
case CompareFunction::kGreater:
return GL_GREATER;
case CompareFunction::kNotEqual:
return GL_NOTEQUAL;
case CompareFunction::kGreaterEqual:
return GL_GEQUAL;
}
FML_UNREACHABLE();
}
constexpr GLenum ToBlendFactor(BlendFactor factor) {
switch (factor) {
case BlendFactor::kZero:
return GL_ZERO;
case BlendFactor::kOne:
return GL_ONE;
case BlendFactor::kSourceColor:
return GL_SRC_COLOR;
case BlendFactor::kOneMinusSourceColor:
return GL_ONE_MINUS_SRC_COLOR;
case BlendFactor::kSourceAlpha:
return GL_SRC_ALPHA;
case BlendFactor::kOneMinusSourceAlpha:
return GL_ONE_MINUS_SRC_ALPHA;
case BlendFactor::kDestinationColor:
return GL_DST_COLOR;
case BlendFactor::kOneMinusDestinationColor:
return GL_ONE_MINUS_DST_COLOR;
case BlendFactor::kDestinationAlpha:
return GL_DST_ALPHA;
case BlendFactor::kOneMinusDestinationAlpha:
return GL_ONE_MINUS_DST_ALPHA;
case BlendFactor::kSourceAlphaSaturated:
return GL_SRC_ALPHA_SATURATE;
case BlendFactor::kBlendColor:
return GL_CONSTANT_COLOR;
case BlendFactor::kOneMinusBlendColor:
return GL_ONE_MINUS_CONSTANT_COLOR;
case BlendFactor::kBlendAlpha:
return GL_CONSTANT_ALPHA;
case BlendFactor::kOneMinusBlendAlpha:
return GL_ONE_MINUS_CONSTANT_ALPHA;
}
FML_UNREACHABLE();
}
constexpr GLenum ToBlendOperation(BlendOperation op) {
switch (op) {
case BlendOperation::kAdd:
return GL_FUNC_ADD;
case BlendOperation::kSubtract:
return GL_FUNC_SUBTRACT;
case BlendOperation::kReverseSubtract:
return GL_FUNC_REVERSE_SUBTRACT;
}
FML_UNREACHABLE();
}
constexpr std::optional<GLenum> ToVertexAttribType(ShaderType type) {
switch (type) {
case ShaderType::kSignedByte:
return GL_BYTE;
case ShaderType::kUnsignedByte:
return GL_UNSIGNED_BYTE;
case ShaderType::kSignedShort:
return GL_SHORT;
case ShaderType::kUnsignedShort:
return GL_UNSIGNED_SHORT;
case ShaderType::kFloat:
return GL_FLOAT;
case ShaderType::kUnknown:
case ShaderType::kVoid:
case ShaderType::kBoolean:
case ShaderType::kSignedInt:
case ShaderType::kUnsignedInt:
case ShaderType::kSignedInt64:
case ShaderType::kUnsignedInt64:
case ShaderType::kAtomicCounter:
case ShaderType::kHalfFloat:
case ShaderType::kDouble:
case ShaderType::kStruct:
case ShaderType::kImage:
case ShaderType::kSampledImage:
case ShaderType::kSampler:
return std::nullopt;
}
FML_UNREACHABLE();
}
constexpr GLenum ToTextureType(TextureType type) {
switch (type) {
case TextureType::kTexture2D:
return GL_TEXTURE_2D;
case TextureType::kTexture2DMultisample:
return GL_TEXTURE_2D_MULTISAMPLE;
case TextureType::kTextureCube:
return GL_TEXTURE_CUBE_MAP;
case TextureType::kTextureExternalOES:
return GL_TEXTURE_EXTERNAL_OES;
}
FML_UNREACHABLE();
}
constexpr std::optional<GLenum> ToTextureTarget(TextureType type) {
switch (type) {
case TextureType::kTexture2D:
return GL_TEXTURE_2D;
case TextureType::kTexture2DMultisample:
return GL_TEXTURE_2D;
case TextureType::kTextureCube:
return GL_TEXTURE_CUBE_MAP;
case TextureType::kTextureExternalOES:
return GL_TEXTURE_EXTERNAL_OES;
}
FML_UNREACHABLE();
}
std::string DebugToFramebufferError(int status);
} // namespace impeller
#endif // FLUTTER_IMPELLER_RENDERER_BACKEND_GLES_FORMATS_GLES_H_