mirror of
https://github.com/MobileGL-Dev/MobileGL
synced 2026-09-12 06:08:30 +09:00
575 lines
24 KiB
C++
575 lines
24 KiB
C++
// MobileGL - MobileGL/MG_Util/Metrics/TextureMetrics.cpp
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// Copyright (c) 2025-2026 MobileGL-Dev
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// Licensed under the GNU Lesser General Public License v3.0:
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// https://www.gnu.org/licenses/gpl-3.0.txt
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// https://www.gnu.org/licenses/lgpl-3.0.txt
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// SPDX-License-Identifier: LGPL-3.0-only
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// End of Source File Header
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#include "TextureMetrics.h"
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#include "Defines.h"
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#include "MG_Util/Math/VectorTypes.h"
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namespace MobileGL {
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namespace MG_Util {
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SizeT GetSizedInternalFormatSizeInBytes(TextureInternalFormat internal) {
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switch (internal) {
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case TextureInternalFormat::R8:
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case TextureInternalFormat::Red: // UNorm8 shadow layout
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case TextureInternalFormat::R8Snorm:
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case TextureInternalFormat::R8I:
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case TextureInternalFormat::StencilIndex8:
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case TextureInternalFormat::R8UI:
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return 1;
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case TextureInternalFormat::R16:
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case TextureInternalFormat::R16Snorm:
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case TextureInternalFormat::R16I:
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case TextureInternalFormat::R16UI:
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case TextureInternalFormat::R16F:
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case TextureInternalFormat::RG8:
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case TextureInternalFormat::RG: // UNorm8x2 shadow layout
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case TextureInternalFormat::RG8Snorm:
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case TextureInternalFormat::RG8I:
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case TextureInternalFormat::RG8UI:
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case TextureInternalFormat::DepthComponent16:
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return 2;
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case TextureInternalFormat::R3G3B2: // UNorm8x3 shadow layout
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case TextureInternalFormat::RGB4:
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case TextureInternalFormat::RGB5:
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case TextureInternalFormat::RGB: // UNorm8x3 shadow layout
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case TextureInternalFormat::RGB8:
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case TextureInternalFormat::RGB8Snorm:
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case TextureInternalFormat::SRGB8:
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case TextureInternalFormat::RGB8I:
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case TextureInternalFormat::RGB8UI:
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return 3;
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// Canonical depth shadow is a full 32-bit unorm word (see PixelStoreProcessor),
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// converted at upload to the image's own 24/32-bit layout.
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case TextureInternalFormat::DepthComponent24:
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return 4;
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case TextureInternalFormat::RGBA2:
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case TextureInternalFormat::RGBA4:
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case TextureInternalFormat::RGB5A1:
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case TextureInternalFormat::RGBA: // UNorm8x4 shadow layout
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case TextureInternalFormat::RGBA8:
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case TextureInternalFormat::RGBA8Snorm:
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case TextureInternalFormat::RGBA8I:
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case TextureInternalFormat::RGBA8UI:
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case TextureInternalFormat::SRGB8Alpha8:
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case TextureInternalFormat::RGB10A2:
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case TextureInternalFormat::RGB10A2UI:
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case TextureInternalFormat::R32F:
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case TextureInternalFormat::R32I:
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case TextureInternalFormat::R32UI:
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case TextureInternalFormat::DepthComponent:
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case TextureInternalFormat::DepthComponent32:
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case TextureInternalFormat::DepthComponent32F:
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case TextureInternalFormat::DepthStencil:
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case TextureInternalFormat::Depth24Stencil8:
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case TextureInternalFormat::RG16:
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case TextureInternalFormat::RG16Snorm:
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case TextureInternalFormat::RG16I:
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case TextureInternalFormat::RG16UI:
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case TextureInternalFormat::RG16F:
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return 4;
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case TextureInternalFormat::RGB16:
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case TextureInternalFormat::RGB10: // UNorm16x3 shadow layout
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case TextureInternalFormat::RGB12: // UNorm16x3 shadow layout
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case TextureInternalFormat::RGB16Snorm:
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case TextureInternalFormat::RGB16F:
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case TextureInternalFormat::RGB16I:
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case TextureInternalFormat::RGB16UI:
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return 6;
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case TextureInternalFormat::RGBA12:
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case TextureInternalFormat::RGBA16:
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case TextureInternalFormat::RGBA16Snorm:
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case TextureInternalFormat::RGBA16I:
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case TextureInternalFormat::RGBA16UI:
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case TextureInternalFormat::RGBA16F:
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case TextureInternalFormat::RG32F:
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case TextureInternalFormat::RG32I:
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case TextureInternalFormat::RG32UI:
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// Shadow bytes hold the GL_FLOAT_32_UNSIGNED_INT_24_8_REV wire format
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// (float depth + a word whose low 8 bits are stencil), 8 bytes/texel.
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case TextureInternalFormat::Depth32FStencil8:
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return 8;
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case TextureInternalFormat::RGB32F:
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case TextureInternalFormat::RGB32I:
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case TextureInternalFormat::RGB32UI:
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return 12;
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case TextureInternalFormat::RGBA32F:
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case TextureInternalFormat::RGBA32I:
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case TextureInternalFormat::RGBA32UI:
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return 16;
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case TextureInternalFormat::R11FG11FB10F:
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case TextureInternalFormat::RGB9E5:
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return 4;
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default:
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return 0;
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}
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}
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SizeT GetBaseInputFormatComponentCount(TextureInputFormat format) {
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switch (format) {
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case TextureInputFormat::Red:
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case TextureInputFormat::RInteger:
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case TextureInputFormat::Green:
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case TextureInputFormat::GreenInteger:
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case TextureInputFormat::Blue:
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case TextureInputFormat::BlueInteger:
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case TextureInputFormat::Alpha:
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case TextureInputFormat::AlphaInteger:
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return 1;
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case TextureInputFormat::RG:
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case TextureInputFormat::RGInteger:
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return 2;
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case TextureInputFormat::RGB:
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case TextureInputFormat::BGR:
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case TextureInputFormat::RGBInteger:
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case TextureInputFormat::BGRInteger:
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return 3;
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case TextureInputFormat::RGBA:
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case TextureInputFormat::BGRA:
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case TextureInputFormat::RGBAInteger:
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case TextureInputFormat::BGRAInteger:
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return 4;
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case TextureInputFormat::StencilIndex:
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case TextureInputFormat::DepthComponent:
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case TextureInputFormat::DepthStencil:
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return 1;
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default:
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MGLOG_D("%s: Unknown input format!", __func__);
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return 0;
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}
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}
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SizeT GetBaseInternalFormatComponentCount(TextureInternalFormat format) {
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switch (format) {
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case TextureInternalFormat::DepthComponent:
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case TextureInternalFormat::DepthComponent16:
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case TextureInternalFormat::DepthComponent24:
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case TextureInternalFormat::DepthComponent32:
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case TextureInternalFormat::DepthComponent32F:
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case TextureInternalFormat::DepthStencil:
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case TextureInternalFormat::Depth24Stencil8:
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case TextureInternalFormat::Depth32FStencil8:
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// Depth stencil is actually 2 components
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// tho real formats always gives byte size in whole
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// so we count this as one here
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case TextureInternalFormat::Red:
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case TextureInternalFormat::R8:
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case TextureInternalFormat::R8Snorm:
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case TextureInternalFormat::R8I:
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case TextureInternalFormat::R8UI:
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case TextureInternalFormat::R16:
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case TextureInternalFormat::R16Snorm:
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case TextureInternalFormat::R16I:
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case TextureInternalFormat::R16UI:
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case TextureInternalFormat::R16F:
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case TextureInternalFormat::R32F:
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case TextureInternalFormat::R32I:
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case TextureInternalFormat::R32UI:
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return 1;
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case TextureInternalFormat::RG:
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case TextureInternalFormat::RG8:
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case TextureInternalFormat::RG8Snorm:
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case TextureInternalFormat::RG8I:
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case TextureInternalFormat::RG8UI:
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case TextureInternalFormat::RG16:
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case TextureInternalFormat::RG16Snorm:
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case TextureInternalFormat::RG16I:
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case TextureInternalFormat::RG16UI:
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case TextureInternalFormat::RG16F:
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case TextureInternalFormat::RG32F:
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case TextureInternalFormat::RG32I:
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case TextureInternalFormat::RG32UI:
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return 2;
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case TextureInternalFormat::RGB:
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case TextureInternalFormat::RGB4:
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case TextureInternalFormat::RGB5:
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case TextureInternalFormat::RGB8:
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case TextureInternalFormat::RGB8Snorm:
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case TextureInternalFormat::RGB10:
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case TextureInternalFormat::RGB12:
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case TextureInternalFormat::RGB16:
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case TextureInternalFormat::RGB16Snorm:
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case TextureInternalFormat::SRGB8:
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case TextureInternalFormat::RGB8I:
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case TextureInternalFormat::RGB8UI:
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case TextureInternalFormat::RGB16F:
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case TextureInternalFormat::RGB32F:
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case TextureInternalFormat::RGB16I:
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case TextureInternalFormat::RGB16UI:
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case TextureInternalFormat::RGB32I:
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case TextureInternalFormat::RGB32UI:
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case TextureInternalFormat::R11FG11FB10F:
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case TextureInternalFormat::RGB9E5:
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return 3;
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case TextureInternalFormat::RGBA:
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case TextureInternalFormat::RGBA2:
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case TextureInternalFormat::RGBA4:
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case TextureInternalFormat::RGBA8:
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case TextureInternalFormat::RGBA8Snorm:
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case TextureInternalFormat::RGBA8I:
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case TextureInternalFormat::RGBA8UI:
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case TextureInternalFormat::SRGB8Alpha8:
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case TextureInternalFormat::RGBA12:
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case TextureInternalFormat::RGBA16:
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case TextureInternalFormat::RGBA16Snorm:
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case TextureInternalFormat::RGBA16I:
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case TextureInternalFormat::RGBA16UI:
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case TextureInternalFormat::RGBA16F:
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case TextureInternalFormat::RGBA32F:
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case TextureInternalFormat::RGBA32I:
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case TextureInternalFormat::RGBA32UI:
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case TextureInternalFormat::RGB10A2:
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case TextureInternalFormat::RGB10A2UI:
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return 4;
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default:
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return 0;
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}
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}
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SizeT GetSizedTexturePixelDataTypeSize(TexturePixelDataType type) {
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switch (type) {
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case TexturePixelDataType::UnsignedByte332:
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case TexturePixelDataType::UnsignedByte233Rev:
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return 1;
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case TexturePixelDataType::UnsignedShort565:
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case TexturePixelDataType::UnsignedShort565Rev:
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case TexturePixelDataType::UnsignedShort4444:
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case TexturePixelDataType::UnsignedShort4444Rev:
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case TexturePixelDataType::UnsignedShort5551:
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case TexturePixelDataType::UnsignedShort1555Rev:
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return 2;
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case TexturePixelDataType::UnsignedInt8888:
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case TexturePixelDataType::UnsignedInt8888Rev:
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case TexturePixelDataType::UnsignedInt1010102:
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case TexturePixelDataType::UnsignedInt2101010Rev:
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case TexturePixelDataType::UnsignedInt101111Rev:
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case TexturePixelDataType::UnsignedInt5999Rev:
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case TexturePixelDataType::UnsignedInt248:
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return 4;
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case TexturePixelDataType::Float32UnsignedInt248Rev:
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// A 32-bit float depth word followed by a 32-bit word holding stencil.
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return 8;
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default:
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return 0;
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}
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}
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SizeT GetBaseTexturePixelDataTypeSize(TexturePixelDataType type) {
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switch (type) {
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case TexturePixelDataType::UnsignedByte:
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case TexturePixelDataType::Byte:
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return 1;
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case TexturePixelDataType::UnsignedShort:
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case TexturePixelDataType::HalfFloat:
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case TexturePixelDataType::Short:
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return 2;
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case TexturePixelDataType::UnsignedInt:
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case TexturePixelDataType::Float:
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case TexturePixelDataType::Int:
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return 4;
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default:
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return 0;
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}
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}
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SizeT GetTexturePixelDataTypeSize(TexturePixelDataType type) {
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SizeT sizedPixelFormatSize = GetSizedTexturePixelDataTypeSize(type);
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if (sizedPixelFormatSize > 0) return sizedPixelFormatSize;
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return GetBaseTexturePixelDataTypeSize(type);
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}
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SizeT GetInternalBytesPerPixel(TextureInternalFormat internalformat, TexturePixelDataType type) {
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SizeT sizedTextureFormatSize = GetSizedInternalFormatSizeInBytes(internalformat);
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if (sizedTextureFormatSize > 0) return sizedTextureFormatSize;
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SizeT sizedPixelFormatSize = GetSizedTexturePixelDataTypeSize(type);
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if (sizedPixelFormatSize > 0) return sizedPixelFormatSize;
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SizeT chCount = GetBaseInternalFormatComponentCount(internalformat);
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SizeT bytesPerChannel = GetBaseTexturePixelDataTypeSize(type);
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return chCount * bytesPerChannel;
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}
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SizeT GetInputBytesPerPixel(TextureInputFormat inputFormat, TexturePixelDataType type) {
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SizeT sizedPixelFormatSize = GetSizedTexturePixelDataTypeSize(type);
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if (sizedPixelFormatSize > 0) return sizedPixelFormatSize;
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SizeT bytesPerChannel = GetBaseTexturePixelDataTypeSize(type);
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SizeT chCount = GetBaseInputFormatComponentCount(inputFormat);
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return chCount * bytesPerChannel;
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}
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SizeT CalculateInputTextureImageSize(TextureInputFormat inputFormat, TexturePixelDataType pixelDataType,
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IntVec3 size) {
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return GetInputBytesPerPixel(inputFormat, pixelDataType) * size.x() * size.y() * size.z();
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}
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ComponentSizes GetComponentSizesForInternalFormat(TextureInternalFormat internal) {
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ComponentSizes s = {};
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switch (internal) {
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case TextureInternalFormat::R8:
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case TextureInternalFormat::Red:
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case TextureInternalFormat::R8Snorm:
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case TextureInternalFormat::R8I:
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case TextureInternalFormat::R8UI:
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s.Red = 8;
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break;
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case TextureInternalFormat::R16:
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case TextureInternalFormat::R16Snorm:
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case TextureInternalFormat::R16I:
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case TextureInternalFormat::R16UI:
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case TextureInternalFormat::R16F:
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s.Red = 16;
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break;
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case TextureInternalFormat::RG8:
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case TextureInternalFormat::RG8Snorm:
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case TextureInternalFormat::RG8I:
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case TextureInternalFormat::RG8UI:
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case TextureInternalFormat::RG:
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s.Red = 8;
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s.Green = 8;
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break;
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case TextureInternalFormat::RG16:
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case TextureInternalFormat::RG16Snorm:
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case TextureInternalFormat::RG16I:
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case TextureInternalFormat::RG16UI:
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case TextureInternalFormat::RG16F:
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s.Red = 16;
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s.Green = 16;
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break;
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case TextureInternalFormat::RGB4:
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case TextureInternalFormat::RGB5:
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case TextureInternalFormat::RGB8:
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case TextureInternalFormat::RGB8Snorm:
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case TextureInternalFormat::SRGB8:
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case TextureInternalFormat::RGB8I:
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case TextureInternalFormat::RGB8UI:
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case TextureInternalFormat::RGB:
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s.Red = 8;
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s.Green = 8;
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s.Blue = 8;
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break;
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case TextureInternalFormat::RGB10:
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s.Red = 10;
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s.Green = 10;
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s.Blue = 10;
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break;
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case TextureInternalFormat::RGB12:
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s.Red = 12;
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s.Green = 12;
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s.Blue = 12;
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break;
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case TextureInternalFormat::RGB16:
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case TextureInternalFormat::RGB16Snorm:
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s.Red = 16;
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s.Green = 16;
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s.Blue = 16;
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break;
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case TextureInternalFormat::R3G3B2:
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s.Red = 3;
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s.Green = 3;
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s.Blue = 2;
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break;
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case TextureInternalFormat::RGBA2:
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s.Red = 2;
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s.Green = 2;
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s.Blue = 2;
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s.Alpha = 2;
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break;
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case TextureInternalFormat::RGBA4:
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s.Red = 4;
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s.Green = 4;
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s.Blue = 4;
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s.Alpha = 4;
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break;
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case TextureInternalFormat::RGB5A1:
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s.Red = 5;
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s.Green = 5;
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s.Blue = 5;
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s.Alpha = 1;
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break;
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case TextureInternalFormat::RGBA8:
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case TextureInternalFormat::RGBA8Snorm:
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case TextureInternalFormat::RGBA8I:
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case TextureInternalFormat::RGBA8UI:
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case TextureInternalFormat::SRGB8Alpha8:
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case TextureInternalFormat::RGBA:
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s.Red = 8;
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s.Green = 8;
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s.Blue = 8;
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s.Alpha = 8;
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break;
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case TextureInternalFormat::RGB10A2:
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case TextureInternalFormat::RGB10A2UI:
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s.Red = 10;
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s.Green = 10;
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s.Blue = 10;
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s.Alpha = 2;
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break;
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case TextureInternalFormat::R32F:
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case TextureInternalFormat::R32I:
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case TextureInternalFormat::R32UI:
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s.Red = 32;
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break;
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case TextureInternalFormat::RG32F:
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case TextureInternalFormat::RG32I:
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case TextureInternalFormat::RG32UI:
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s.Red = 32;
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s.Green = 32;
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break;
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case TextureInternalFormat::RGBA12:
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s.Red = 12;
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s.Green = 12;
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s.Blue = 12;
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s.Alpha = 12;
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break;
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case TextureInternalFormat::RGBA16:
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case TextureInternalFormat::RGBA16Snorm:
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case TextureInternalFormat::RGBA16I:
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case TextureInternalFormat::RGBA16UI:
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case TextureInternalFormat::RGBA16F:
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s.Red = 16;
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s.Green = 16;
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s.Blue = 16;
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s.Alpha = 16;
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break;
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case TextureInternalFormat::RGB16F:
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case TextureInternalFormat::RGB16I:
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case TextureInternalFormat::RGB16UI:
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s.Red = 16;
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s.Green = 16;
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s.Blue = 16;
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break;
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case TextureInternalFormat::RGB32F:
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case TextureInternalFormat::RGB32I:
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case TextureInternalFormat::RGB32UI:
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s.Red = 32;
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s.Green = 32;
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s.Blue = 32;
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break;
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case TextureInternalFormat::RGBA32F:
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case TextureInternalFormat::RGBA32I:
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case TextureInternalFormat::RGBA32UI:
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s.Red = 32;
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s.Green = 32;
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s.Blue = 32;
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s.Alpha = 32;
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break;
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case TextureInternalFormat::R11FG11FB10F:
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s.Red = 11;
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s.Green = 11;
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s.Blue = 10;
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break;
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case TextureInternalFormat::RGB9E5:
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s.Red = 9;
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s.Green = 9;
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s.Blue = 9;
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break;
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case TextureInternalFormat::DepthComponent:
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case TextureInternalFormat::DepthComponent16:
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s.Depth = 16;
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break;
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case TextureInternalFormat::DepthComponent24:
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s.Depth = 24;
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break;
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case TextureInternalFormat::DepthComponent32:
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case TextureInternalFormat::DepthComponent32F:
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s.Depth = 32;
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break;
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case TextureInternalFormat::DepthStencil:
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case TextureInternalFormat::Depth24Stencil8:
|
|
s.Depth = 24;
|
|
s.Stencil = 8;
|
|
break;
|
|
case TextureInternalFormat::Depth32FStencil8:
|
|
s.Depth = 32;
|
|
s.Stencil = 8;
|
|
break;
|
|
case TextureInternalFormat::StencilIndex8:
|
|
s.Stencil = 8;
|
|
break;
|
|
case TextureInternalFormat::Unknown:
|
|
// Queried for attachments that have no storage yet (e.g. framebuffer
|
|
// parameter queries on the initial state); every size stays 0.
|
|
break;
|
|
default:
|
|
MGLOG_W_ONCE("Unimplemented internal format in GetComponentSizesForInternalFormat: %d",
|
|
static_cast<Int>(internal));
|
|
break;
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
CompressedFormatInfo GetCompressedFormatInfo(GLenum internalFormat) {
|
|
// Every format here is 4x4-blocked; only the bytes per block differ (8 for the one- and
|
|
// two-channel RGTC/EAC and the 1-bit-alpha ETC2 forms, 16 for BPTC and the full-alpha
|
|
// ETC2/EAC and two-channel EAC forms). The generic compressed formats (GL_COMPRESSED_RGBA
|
|
// and friends) are deliberately absent: GL lets the implementation pick, MobileGL picks
|
|
// uncompressed, and glCompressedTexImage* must reject them because there is no defined
|
|
// block layout to hand it. The accepted set is exactly the set
|
|
// ConvertGLEnumToTextureInternalFormat can back with uncompressed storage, so this call
|
|
// can never accept a format whose texel shadow cannot be allocated.
|
|
switch (internalFormat) {
|
|
case GL_COMPRESSED_RED_RGTC1:
|
|
case GL_COMPRESSED_SIGNED_RED_RGTC1:
|
|
case GL_COMPRESSED_RGB8_ETC2:
|
|
case GL_COMPRESSED_SRGB8_ETC2:
|
|
case GL_COMPRESSED_RGB8_PUNCHTHROUGH_ALPHA1_ETC2:
|
|
case GL_COMPRESSED_SRGB8_PUNCHTHROUGH_ALPHA1_ETC2:
|
|
case GL_COMPRESSED_R11_EAC:
|
|
case GL_COMPRESSED_SIGNED_R11_EAC:
|
|
return {4, 4, 8};
|
|
case GL_COMPRESSED_RG_RGTC2:
|
|
case GL_COMPRESSED_SIGNED_RG_RGTC2:
|
|
case GL_COMPRESSED_RGBA_BPTC_UNORM:
|
|
case GL_COMPRESSED_SRGB_ALPHA_BPTC_UNORM:
|
|
case GL_COMPRESSED_RGB_BPTC_SIGNED_FLOAT:
|
|
case GL_COMPRESSED_RGB_BPTC_UNSIGNED_FLOAT:
|
|
case GL_COMPRESSED_RGBA8_ETC2_EAC:
|
|
case GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC:
|
|
case GL_COMPRESSED_RG11_EAC:
|
|
case GL_COMPRESSED_SIGNED_RG11_EAC:
|
|
return {4, 4, 16};
|
|
default:
|
|
return {};
|
|
}
|
|
}
|
|
|
|
SizeT CalculateCompressedTextureImageSize(const CompressedFormatInfo& info, IntVec3 size) {
|
|
if (info.blockWidth == 0 || info.blockHeight == 0) return 0;
|
|
const SizeT width = static_cast<SizeT>(std::max<Int>(size.x(), 0));
|
|
const SizeT height = static_cast<SizeT>(std::max<Int>(size.y(), 0));
|
|
const SizeT depth = static_cast<SizeT>(std::max<Int>(size.z(), 1));
|
|
const SizeT blocksX = (width + info.blockWidth - 1) / info.blockWidth;
|
|
const SizeT blocksY = (height + info.blockHeight - 1) / info.blockHeight;
|
|
return blocksX * blocksY * depth * info.blockByteSize;
|
|
}
|
|
|
|
} // namespace MG_Util
|
|
} // namespace MobileGL
|