mirror of
https://github.com/mozilla/gecko-dev.git
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377 lines
8.9 KiB
C++
377 lines
8.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef WEBGL_FORMATS_H_
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#define WEBGL_FORMATS_H_
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#include <map>
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#include <set>
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#include "mozilla/UniquePtr.h"
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#include "WebGLTypes.h"
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namespace mozilla {
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namespace webgl {
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typedef uint8_t EffectiveFormatValueT;
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enum class EffectiveFormat : EffectiveFormatValueT {
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// GLES 3.0.4, p128-129, "Required Texture Formats"
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// "Texture and renderbuffer color formats"
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RGBA32I,
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RGBA32UI,
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RGBA16I,
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RGBA16UI,
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RGBA8,
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RGBA8I,
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RGBA8UI,
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SRGB8_ALPHA8,
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RGB10_A2,
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RGB10_A2UI,
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RGBA4,
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RGB5_A1,
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RGB8,
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RGB565,
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RG32I,
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RG32UI,
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RG16I,
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RG16UI,
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RG8,
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RG8I,
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RG8UI,
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R32I,
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R32UI,
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R16I,
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R16UI,
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R8,
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R8I,
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R8UI,
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// "Texture-only color formats"
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RGBA32F,
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RGBA16F,
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RGBA8_SNORM,
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RGB32F,
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RGB32I,
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RGB32UI,
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RGB16F,
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RGB16I,
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RGB16UI,
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RGB8_SNORM,
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RGB8I,
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RGB8UI,
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SRGB8,
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R11F_G11F_B10F,
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RGB9_E5,
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RG32F,
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RG16F,
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RG8_SNORM,
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R32F,
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R16F,
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R8_SNORM,
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// "Depth formats"
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DEPTH_COMPONENT32F,
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DEPTH_COMPONENT24,
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DEPTH_COMPONENT16,
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// "Combined depth+stencil formats"
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DEPTH32F_STENCIL8,
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DEPTH24_STENCIL8,
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// GLES 3.0.4, p205-206, "Required Renderbuffer Formats"
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STENCIL_INDEX8,
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////////////////////////////////////
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// GLES 3.0.4, p147, table 3.19
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// GLES 3.0.4, p286+, $C.1 "ETC Compressed Texture Image Formats"
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COMPRESSED_R11_EAC,
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COMPRESSED_SIGNED_R11_EAC,
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COMPRESSED_RG11_EAC,
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COMPRESSED_SIGNED_RG11_EAC,
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COMPRESSED_RGB8_ETC2,
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COMPRESSED_SRGB8_ETC2,
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COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2,
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COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2,
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COMPRESSED_RGBA8_ETC2_EAC,
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COMPRESSED_SRGB8_ALPHA8_ETC2_EAC,
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// AMD_compressed_ATC_texture
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ATC_RGB_AMD,
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ATC_RGBA_EXPLICIT_ALPHA_AMD,
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ATC_RGBA_INTERPOLATED_ALPHA_AMD,
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// EXT_texture_compression_s3tc
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COMPRESSED_RGB_S3TC_DXT1_EXT,
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COMPRESSED_RGBA_S3TC_DXT1_EXT,
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COMPRESSED_RGBA_S3TC_DXT3_EXT,
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COMPRESSED_RGBA_S3TC_DXT5_EXT,
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// KHR_texture_compression_astc_ldr
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COMPRESSED_RGBA_ASTC_4x4_KHR,
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COMPRESSED_RGBA_ASTC_5x4_KHR,
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COMPRESSED_RGBA_ASTC_5x5_KHR,
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COMPRESSED_RGBA_ASTC_6x5_KHR,
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COMPRESSED_RGBA_ASTC_6x6_KHR,
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COMPRESSED_RGBA_ASTC_8x5_KHR,
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COMPRESSED_RGBA_ASTC_8x6_KHR,
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COMPRESSED_RGBA_ASTC_8x8_KHR,
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COMPRESSED_RGBA_ASTC_10x5_KHR,
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COMPRESSED_RGBA_ASTC_10x6_KHR,
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COMPRESSED_RGBA_ASTC_10x8_KHR,
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COMPRESSED_RGBA_ASTC_10x10_KHR,
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COMPRESSED_RGBA_ASTC_12x10_KHR,
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COMPRESSED_RGBA_ASTC_12x12_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_4x4_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_5x4_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_5x5_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_6x5_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_6x6_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_8x5_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_8x6_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_8x8_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_10x5_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_10x6_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_10x8_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_10x10_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_12x10_KHR,
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COMPRESSED_SRGB8_ALPHA8_ASTC_12x12_KHR,
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// IMG_texture_compression_pvrtc
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COMPRESSED_RGB_PVRTC_4BPPV1,
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COMPRESSED_RGBA_PVRTC_4BPPV1,
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COMPRESSED_RGB_PVRTC_2BPPV1,
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COMPRESSED_RGBA_PVRTC_2BPPV1,
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// OES_compressed_ETC1_RGB8_texture
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ETC1_RGB8_OES,
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////////////////////////////////////
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// GLES 3.0.4, p128, table 3.12.
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Luminance8Alpha8,
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Luminance8,
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Alpha8,
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// OES_texture_float
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Luminance32FAlpha32F,
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Luminance32F,
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Alpha32F,
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// OES_texture_half_float
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Luminance16FAlpha16F,
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Luminance16F,
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Alpha16F,
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MAX,
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};
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enum class UnsizedFormat : uint8_t {
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R,
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RG,
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RGB,
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RGBA,
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LA,
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L,
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A,
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D,
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S,
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DEPTH_STENCIL, // `DS` is a macro on Solaris. (regset.h)
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};
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// GLES 3.0.4 p114 Table 3.4, p240
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enum class ComponentType : uint8_t {
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None,
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Int, // RGBA32I
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UInt, // RGBA32UI, STENCIL_INDEX8
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NormInt, // RGBA8_SNORM
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NormUInt, // RGBA8, DEPTH_COMPONENT16
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Float, // RGBA32F
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Special, // DEPTH24_STENCIL8
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};
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enum class CompressionFamily : uint8_t {
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ASTC,
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ATC,
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ES3, // ETC2 or EAC
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ETC1,
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PVRTC,
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S3TC,
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};
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////////////////////////////////////////////////////////////////////////////////
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struct CompressedFormatInfo
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{
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const EffectiveFormat effectiveFormat;
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const uint8_t bytesPerBlock;
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const uint8_t blockWidth;
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const uint8_t blockHeight;
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const CompressionFamily family;
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};
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struct FormatInfo
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{
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const EffectiveFormat effectiveFormat;
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const char* const name;
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const GLenum sizedFormat;
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const UnsizedFormat unsizedFormat;
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const ComponentType componentType;
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const bool isSRGB;
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const CompressedFormatInfo* const compression;
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const uint8_t estimatedBytesPerPixel; // 0 iff bool(compression).
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// In bits. Iff bool(compression), active channels are 1.
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const uint8_t r;
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const uint8_t g;
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const uint8_t b;
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const uint8_t a;
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const uint8_t d;
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const uint8_t s;
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//////
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std::map<UnsizedFormat, const FormatInfo*> copyDecayFormats;
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const FormatInfo* GetCopyDecayFormat(UnsizedFormat) const;
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bool IsColorFormat() const {
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// Alpha is a 'color format' since it's 'color-attachable'.
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return bool(compression) ||
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bool(r | g | b | a);
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}
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};
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struct PackingInfo
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{
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GLenum format;
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GLenum type;
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bool operator <(const PackingInfo& x) const
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{
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if (format != x.format)
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return format < x.format;
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return type < x.type;
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}
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};
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struct DriverUnpackInfo
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{
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GLenum internalFormat;
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GLenum unpackFormat;
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GLenum unpackType;
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PackingInfo ToPacking() const {
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return {unpackFormat, unpackType};
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}
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};
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//////////////////////////////////////////////////////////////////////////////////////////
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const FormatInfo* GetFormat(EffectiveFormat format);
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uint8_t BytesPerPixel(const PackingInfo& packing);
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bool GetBytesPerPixel(const PackingInfo& packing, uint8_t* const out_bytes);
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/*
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GLint ComponentSize(const FormatInfo* format, GLenum component);
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GLenum ComponentType(const FormatInfo* format);
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*/
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////////////////////////////////////////
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struct FormatUsageInfo
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{
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const FormatInfo* const format;
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private:
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bool isRenderable;
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public:
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bool isFilterable;
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std::map<PackingInfo, DriverUnpackInfo> validUnpacks;
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const DriverUnpackInfo* idealUnpack;
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const GLint* textureSwizzleRGBA;
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bool maxSamplesKnown;
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uint32_t maxSamples;
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static const GLint kLuminanceSwizzleRGBA[4];
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static const GLint kAlphaSwizzleRGBA[4];
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static const GLint kLumAlphaSwizzleRGBA[4];
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explicit FormatUsageInfo(const FormatInfo* _format)
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: format(_format)
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, isRenderable(false)
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, isFilterable(false)
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, idealUnpack(nullptr)
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, textureSwizzleRGBA(nullptr)
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, maxSamplesKnown(false)
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, maxSamples(0)
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{ }
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bool IsRenderable() const { return isRenderable; }
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void SetRenderable();
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bool IsUnpackValid(const PackingInfo& key,
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const DriverUnpackInfo** const out_value) const;
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void ResolveMaxSamples(gl::GLContext* gl);
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};
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class FormatUsageAuthority
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{
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std::map<EffectiveFormat, FormatUsageInfo> mUsageMap;
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std::map<GLenum, const FormatUsageInfo*> mRBFormatMap;
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std::map<GLenum, const FormatUsageInfo*> mSizedTexFormatMap;
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std::map<PackingInfo, const FormatUsageInfo*> mUnsizedTexFormatMap;
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std::set<GLenum> mValidTexInternalFormats;
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std::set<GLenum> mValidTexUnpackFormats;
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std::set<GLenum> mValidTexUnpackTypes;
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public:
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static UniquePtr<FormatUsageAuthority> CreateForWebGL1(gl::GLContext* gl);
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static UniquePtr<FormatUsageAuthority> CreateForWebGL2(gl::GLContext* gl);
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private:
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FormatUsageAuthority() { }
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public:
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FormatUsageInfo* EditUsage(EffectiveFormat format);
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const FormatUsageInfo* GetUsage(EffectiveFormat format) const;
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void AddTexUnpack(FormatUsageInfo* usage, const PackingInfo& pi,
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const DriverUnpackInfo& dui);
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bool IsInternalFormatEnumValid(GLenum internalFormat) const;
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bool AreUnpackEnumsValid(GLenum unpackFormat, GLenum unpackType) const;
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void AllowRBFormat(GLenum sizedFormat, const FormatUsageInfo* usage);
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void AllowSizedTexFormat(GLenum sizedFormat, const FormatUsageInfo* usage);
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void AllowUnsizedTexFormat(const PackingInfo& pi, const FormatUsageInfo* usage);
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const FormatUsageInfo* GetRBUsage(GLenum sizedFormat) const;
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const FormatUsageInfo* GetSizedTexUsage(GLenum sizedFormat) const;
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const FormatUsageInfo* GetUnsizedTexUsage(const PackingInfo& pi) const;
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};
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} // namespace webgl
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} // namespace mozilla
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#endif // WEBGL_FORMATS_H_
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