forked from mirrors/gecko-dev
436 lines
10 KiB
C++
436 lines
10 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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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::webgl {
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using EffectiveFormatValueT = uint8_t;
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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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// EXT_texture_compression_bptc
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COMPRESSED_RGBA_BPTC_UNORM,
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COMPRESSED_SRGB_ALPHA_BPTC_UNORM,
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COMPRESSED_RGB_BPTC_SIGNED_FLOAT,
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COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT,
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// EXT_texture_compression_rgtc
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COMPRESSED_RED_RGTC1,
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COMPRESSED_SIGNED_RED_RGTC1,
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COMPRESSED_RG_RGTC2,
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COMPRESSED_SIGNED_RG_RGTC2,
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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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// EXT_texture_sRGB
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COMPRESSED_SRGB_S3TC_DXT1_EXT,
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COMPRESSED_SRGB_ALPHA_S3TC_DXT1_EXT,
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COMPRESSED_SRGB_ALPHA_S3TC_DXT3_EXT,
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COMPRESSED_SRGB_ALPHA_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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// EXT_texture_norm16
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R16,
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RG16,
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RGB16,
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RGBA16,
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R16_SNORM,
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RG16_SNORM,
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RGB16_SNORM,
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RGBA16_SNORM,
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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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Int, // RGBA32I
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UInt, // RGBA32UI
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NormInt, // RGBA8_SNORM
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NormUInt, // RGBA8
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Float, // RGBA32F
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};
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const char* ToString(ComponentType);
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enum class TextureBaseType : uint8_t {
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Int = uint8_t(ComponentType::Int),
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UInt = uint8_t(ComponentType::UInt),
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Float = uint8_t(ComponentType::Float), // Also includes NormU?Int and Depth
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};
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const char* ToString(TextureBaseType);
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enum class CompressionFamily : uint8_t {
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ASTC,
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BPTC,
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ES3, // ETC2 or EAC
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ETC1,
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PVRTC,
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RGTC,
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S3TC,
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};
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////////////////////////////////////////////////////////////////////////////////
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struct CompressedFormatInfo {
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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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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 TextureBaseType baseType;
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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) || bool(r | g | b | a);
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}
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};
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//////////////////////////////////////////////////////////////////////////////////////////
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struct PackingInfoInfo final {
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uint8_t bytesPerElement = 0;
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uint8_t elementsPerPixel = 0; // E.g. 1 for LOCAL_GL_UNSIGNED_SHORT_4_4_4_4
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bool isPacked = false;
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static Maybe<PackingInfoInfo> For(const PackingInfo&);
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inline uint8_t BytesPerPixel() const {
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return bytesPerElement * elementsPerPixel;
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}
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};
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const FormatInfo* GetFormat(EffectiveFormat format);
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inline uint8_t BytesPerPixel(const PackingInfo& packing) {
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const auto pii = PackingInfoInfo::For(packing);
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if (MOZ_LIKELY(pii)) return pii->BytesPerPixel();
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gfxCriticalError() << "Bad BytesPerPixel(" << packing << ")";
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MOZ_CRASH("Bad `packing`.");
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}
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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 FormatRenderableState final {
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private:
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enum class RenderableState {
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Disabled,
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Implicit,
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Explicit,
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};
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public:
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RenderableState state = RenderableState::Disabled;
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WebGLExtensionID extid = WebGLExtensionID::Max;
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static FormatRenderableState Explicit() {
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return {RenderableState::Explicit};
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}
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static FormatRenderableState Implicit(WebGLExtensionID extid) {
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return {RenderableState::Implicit, extid};
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}
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bool IsRenderable() const { return state != RenderableState::Disabled; }
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bool IsExplicit() const { return state == RenderableState::Explicit; }
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};
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struct FormatUsageInfo {
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const FormatInfo* const format;
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private:
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FormatRenderableState renderableState;
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public:
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bool isFilterable = false;
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std::map<PackingInfo, DriverUnpackInfo> validUnpacks;
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const DriverUnpackInfo* idealUnpack = nullptr;
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const GLint* textureSwizzleRGBA = nullptr;
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private:
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mutable bool maxSamplesKnown = false;
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mutable uint32_t maxSamples = 0;
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public:
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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* const _format) : format(_format) {
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if (format->IsColorFormat() && format->baseType != TextureBaseType::Float) {
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maxSamplesKnown = true;
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}
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}
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bool IsRenderable() const { return renderableState.IsRenderable(); }
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void SetRenderable(
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const FormatRenderableState& state = FormatRenderableState::Explicit());
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bool IsExplicitlyRenderable() const { return renderableState.IsExplicit(); }
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WebGLExtensionID GetExtensionID() const {
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MOZ_ASSERT(renderableState.extid != WebGLExtensionID::Max);
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return renderableState.extid;
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}
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bool IsUnpackValid(const PackingInfo& key,
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const DriverUnpackInfo** const out_value) const;
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private:
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void ResolveMaxSamples(gl::GLContext& gl) const;
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public:
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uint32_t MaxSamples(gl::GLContext& gl) const {
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if (!maxSamplesKnown) {
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ResolveMaxSamples(gl);
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}
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return maxSamples;
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}
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};
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class FormatUsageAuthority {
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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() = default;
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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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bool expectRenderable = true);
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void AllowSizedTexFormat(GLenum sizedFormat, const FormatUsageInfo* usage);
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void AllowUnsizedTexFormat(const PackingInfo& pi,
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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 mozilla::webgl
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#endif // WEBGL_FORMATS_H_
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