diff options
Diffstat (limited to 'gfx/angle/checkout/src/libANGLE/renderer/Format.h')
| -rw-r--r-- | gfx/angle/checkout/src/libANGLE/renderer/Format.h | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/gfx/angle/checkout/src/libANGLE/renderer/Format.h b/gfx/angle/checkout/src/libANGLE/renderer/Format.h new file mode 100644 index 0000000000..edf8f1e62b --- /dev/null +++ b/gfx/angle/checkout/src/libANGLE/renderer/Format.h @@ -0,0 +1,214 @@ +// +// Copyright 2016 The ANGLE Project Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. +// +// Format: +// A universal description of typed GPU storage. Across multiple +// renderer back-ends, there are common formats and some distinct +// permutations, this enum encapsulates them all. Formats apply to +// textures, but could also apply to any typed data. + +#ifndef LIBANGLE_RENDERER_FORMAT_H_ +#define LIBANGLE_RENDERER_FORMAT_H_ + +#include "libANGLE/renderer/FormatID_autogen.h" +#include "libANGLE/renderer/renderer_utils.h" + +namespace angle +{ +enum class FormatID; + +extern const Format gFormatInfoTable[]; + +struct Format final : private angle::NonCopyable +{ + inline constexpr Format(FormatID id, + GLenum glFormat, + GLenum fboFormat, + rx::MipGenerationFunction mipGen, + const rx::FastCopyFunctionMap &fastCopyFunctions, + rx::PixelReadFunction colorRead, + rx::PixelWriteFunction colorWrite, + GLenum componentType, + GLuint redBits, + GLuint greenBits, + GLuint blueBits, + GLuint alphaBits, + GLuint luminanceBits, + GLuint depthBits, + GLuint stencilBits, + GLuint pixelBytes, + GLuint componentAlignmentMask, + bool isBlock, + bool isFixed, + bool isScaled, + gl::VertexAttribType vertexAttribType); + + static const Format &Get(FormatID id) { return gFormatInfoTable[static_cast<int>(id)]; } + + static FormatID InternalFormatToID(GLenum internalFormat); + + constexpr bool hasDepthOrStencilBits() const; + constexpr bool isLUMA() const; + + constexpr bool isSint() const; + constexpr bool isUint() const; + constexpr bool isSnorm() const; + constexpr bool isUnorm() const; + constexpr bool isFloat() const; + + constexpr bool isInt() const { return isSint() || isUint(); } + constexpr bool isNorm() const { return isSnorm() || isUnorm(); } + constexpr bool isPureInt() const { return isInt() && !isScaled; } + + bool operator==(const Format &other) const { return this->id == other.id; } + + FormatID id; + + // The closest matching GL internal format for the storage this format uses. Note that this + // may be a different internal format than the one this ANGLE format is used for. + GLenum glInternalFormat; + + // The format we should report to the GL layer when querying implementation formats from a FBO. + // This might not be the same as the glInternalFormat, since some DXGI formats don't have + // matching GL format enums, like BGRA4, BGR5A1 and B5G6R6. + GLenum fboImplementationInternalFormat; + + rx::MipGenerationFunction mipGenerationFunction; + rx::PixelReadFunction pixelReadFunction; + rx::PixelWriteFunction pixelWriteFunction; + + // A map from a gl::FormatType to a fast pixel copy function for this format. + const rx::FastCopyFunctionMap &fastCopyFunctions; + + GLenum componentType; + + GLuint redBits; + GLuint greenBits; + GLuint blueBits; + GLuint alphaBits; + GLuint luminanceBits; + GLuint depthBits; + GLuint stencilBits; + + GLuint pixelBytes; + + // For 1-byte components, is MAX_UINT. For 2-byte, is 0x1. For 4-byte, is 0x3. For all others, + // 0x0. + GLuint componentAlignmentMask; + + GLuint channelCount; + + bool isBlock; + bool isFixed; + bool isScaled; + + // For vertex formats only. Returns the "type" value for glVertexAttribPointer etc. + gl::VertexAttribType vertexAttribType; +}; + +constexpr GLuint GetChannelCount(GLuint redBits, + GLuint greenBits, + GLuint blueBits, + GLuint alphaBits, + GLuint luminanceBits, + GLuint depthBits, + GLuint stencilBits) +{ + return (redBits > 0 ? 1 : 0) + (greenBits > 0 ? 1 : 0) + (blueBits > 0 ? 1 : 0) + + (alphaBits > 0 ? 1 : 0) + (luminanceBits > 0 ? 1 : 0) + (depthBits > 0 ? 1 : 0) + + (stencilBits > 0 ? 1 : 0); +} + +constexpr Format::Format(FormatID id, + GLenum glFormat, + GLenum fboFormat, + rx::MipGenerationFunction mipGen, + const rx::FastCopyFunctionMap &fastCopyFunctions, + rx::PixelReadFunction colorRead, + rx::PixelWriteFunction colorWrite, + GLenum componentType, + GLuint redBits, + GLuint greenBits, + GLuint blueBits, + GLuint alphaBits, + GLuint luminanceBits, + GLuint depthBits, + GLuint stencilBits, + GLuint pixelBytes, + GLuint componentAlignmentMask, + bool isBlock, + bool isFixed, + bool isScaled, + gl::VertexAttribType vertexAttribType) + : id(id), + glInternalFormat(glFormat), + fboImplementationInternalFormat(fboFormat), + mipGenerationFunction(mipGen), + pixelReadFunction(colorRead), + pixelWriteFunction(colorWrite), + fastCopyFunctions(fastCopyFunctions), + componentType(componentType), + redBits(redBits), + greenBits(greenBits), + blueBits(blueBits), + alphaBits(alphaBits), + luminanceBits(luminanceBits), + depthBits(depthBits), + stencilBits(stencilBits), + pixelBytes(pixelBytes), + componentAlignmentMask(componentAlignmentMask), + channelCount(GetChannelCount(redBits, + greenBits, + blueBits, + alphaBits, + luminanceBits, + depthBits, + stencilBits)), + isBlock(isBlock), + isFixed(isFixed), + isScaled(isScaled), + vertexAttribType(vertexAttribType) +{} + +constexpr bool Format::hasDepthOrStencilBits() const +{ + return depthBits > 0 || stencilBits > 0; +} + +constexpr bool Format::isLUMA() const +{ + // There's no format with G or B without R + ASSERT(redBits > 0 || (greenBits == 0 && blueBits == 0)); + return redBits == 0 && (luminanceBits > 0 || alphaBits > 0); +} + +constexpr bool Format::isSint() const +{ + return componentType == GL_INT; +} + +constexpr bool Format::isUint() const +{ + return componentType == GL_UNSIGNED_INT; +} + +constexpr bool Format::isSnorm() const +{ + return componentType == GL_SIGNED_NORMALIZED; +} + +constexpr bool Format::isUnorm() const +{ + return componentType == GL_UNSIGNED_NORMALIZED; +} + +constexpr bool Format::isFloat() const +{ + return componentType == GL_FLOAT; +} + +} // namespace angle + +#endif // LIBANGLE_RENDERER_FORMAT_H_ |