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84c4b66721
In OpenGL this is called the (base) internal format which is an expectation expressed by the client for the minimum supported texel storage format in the GPU for textures. Since we store everything as RGBA in a `FloatVector4`, the only thing we do in this patch is remember the expected internal format, and when we write new texels we fixate the value for the alpha channel to 1 for two formats that require it. `PixelConverter` has learned how to transform pixels during transfer to support this.
291 lines
12 KiB
C++
291 lines
12 KiB
C++
/*
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* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <LibGL/Image.h>
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namespace GL {
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ErrorOr<GPU::PixelType> get_validated_pixel_type(GLenum target, GLenum internal_format, GLenum format, GLenum type)
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{
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// We accept GL_NONE as target for non-texture related calls (such as `glDrawPixels`)
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if (target != GL_NONE
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&& target != GL_TEXTURE_1D
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&& target != GL_TEXTURE_2D
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&& target != GL_TEXTURE_3D
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&& target != GL_TEXTURE_1D_ARRAY
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&& target != GL_TEXTURE_2D_ARRAY
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&& target != GL_TEXTURE_CUBE_MAP
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&& target != GL_PROXY_TEXTURE_1D
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&& target != GL_PROXY_TEXTURE_2D
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&& target != GL_PROXY_TEXTURE_3D)
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return Error::from_errno(GL_INVALID_ENUM);
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// Internal format can be a number between 1 and 4. Symbolic formats were only added with EXT_texture, promoted to core in OpenGL 1.1
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if (internal_format == 1)
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internal_format = GL_ALPHA;
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else if (internal_format == 2)
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internal_format = GL_LUMINANCE_ALPHA;
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else if (internal_format == 3)
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internal_format = GL_RGB;
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else if (internal_format == 4)
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internal_format = GL_RGBA;
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if (internal_format != GL_NONE
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&& internal_format != GL_ALPHA
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&& internal_format != GL_ALPHA4
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&& internal_format != GL_ALPHA8
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&& internal_format != GL_ALPHA12
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&& internal_format != GL_ALPHA16
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&& internal_format != GL_COMPRESSED_ALPHA
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&& internal_format != GL_COMPRESSED_LUMINANCE
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&& internal_format != GL_COMPRESSED_LUMINANCE_ALPHA
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&& internal_format != GL_COMPRESSED_INTENSITY
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&& internal_format != GL_COMPRESSED_RGB
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&& internal_format != GL_COMPRESSED_RGBA
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&& internal_format != GL_DEPTH_COMPONENT
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&& internal_format != GL_DEPTH_COMPONENT16
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&& internal_format != GL_DEPTH_COMPONENT24
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&& internal_format != GL_DEPTH_COMPONENT32
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&& internal_format != GL_DEPTH_STENCIL
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&& internal_format != GL_LUMINANCE
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&& internal_format != GL_LUMINANCE4
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&& internal_format != GL_LUMINANCE8
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&& internal_format != GL_LUMINANCE12
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&& internal_format != GL_LUMINANCE16
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&& internal_format != GL_LUMINANCE_ALPHA
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&& internal_format != GL_LUMINANCE4_ALPHA4
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&& internal_format != GL_LUMINANCE6_ALPHA2
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&& internal_format != GL_LUMINANCE8_ALPHA8
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&& internal_format != GL_LUMINANCE12_ALPHA4
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&& internal_format != GL_LUMINANCE12_ALPHA12
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&& internal_format != GL_LUMINANCE16_ALPHA16
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&& internal_format != GL_INTENSITY
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&& internal_format != GL_INTENSITY4
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&& internal_format != GL_INTENSITY8
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&& internal_format != GL_INTENSITY12
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&& internal_format != GL_INTENSITY16
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&& internal_format != GL_R3_G3_B2
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&& internal_format != GL_RED
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&& internal_format != GL_RG
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&& internal_format != GL_RGB
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&& internal_format != GL_RGB4
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&& internal_format != GL_RGB5
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&& internal_format != GL_RGB8
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&& internal_format != GL_RGB10
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&& internal_format != GL_RGB12
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&& internal_format != GL_RGB16
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&& internal_format != GL_RGBA
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&& internal_format != GL_RGBA2
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&& internal_format != GL_RGBA4
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&& internal_format != GL_RGB5_A1
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&& internal_format != GL_RGBA8
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&& internal_format != GL_RGB10_A2
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&& internal_format != GL_RGBA12
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&& internal_format != GL_RGBA16
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&& internal_format != GL_SLUMINANCE
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&& internal_format != GL_SLUMINANCE8
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&& internal_format != GL_SLUMINANCE_ALPHA
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&& internal_format != GL_SLUMINANCE8_ALPHA8
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&& internal_format != GL_SRGB
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&& internal_format != GL_SRGB8
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&& internal_format != GL_SRGB_ALPHA
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&& internal_format != GL_SRGB8_ALPHA8)
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return Error::from_errno(GL_INVALID_ENUM);
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if ((format < GL_COLOR_INDEX || format > GL_LUMINANCE_ALPHA) && format != GL_BGR && format != GL_BGRA)
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return Error::from_errno(GL_INVALID_ENUM);
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if (type != GL_BITMAP
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&& (type < GL_BYTE || type > GL_FLOAT)
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&& type != GL_HALF_FLOAT
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&& (type < GL_UNSIGNED_BYTE_3_3_2 || type > GL_UNSIGNED_INT_10_10_10_2)
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&& (type < GL_UNSIGNED_BYTE_2_3_3_REV || type > GL_UNSIGNED_INT_2_10_10_10_REV))
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return Error::from_errno(GL_INVALID_ENUM);
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if (type == GL_BITMAP && format != GL_COLOR_INDEX && format != GL_STENCIL_INDEX)
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return Error::from_errno(GL_INVALID_ENUM);
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if (format != GL_RGB && (type == GL_UNSIGNED_BYTE_3_3_2 || type == GL_UNSIGNED_BYTE_2_3_3_REV || type == GL_UNSIGNED_SHORT_5_6_5 || type == GL_UNSIGNED_SHORT_5_6_5_REV))
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return Error::from_errno(GL_INVALID_OPERATION);
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if ((type == GL_UNSIGNED_SHORT_4_4_4_4
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|| type == GL_UNSIGNED_SHORT_4_4_4_4_REV
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|| type == GL_UNSIGNED_SHORT_5_5_5_1
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|| type == GL_UNSIGNED_SHORT_1_5_5_5_REV
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|| type == GL_UNSIGNED_INT_8_8_8_8
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|| type == GL_UNSIGNED_INT_8_8_8_8_REV
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|| type == GL_UNSIGNED_INT_10_10_10_2
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|| type == GL_UNSIGNED_INT_2_10_10_10_REV)
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&& format != GL_RGBA
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&& format != GL_BGRA)
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return Error::from_errno(GL_INVALID_OPERATION);
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if (internal_format != GL_NONE) {
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auto const internal_format_is_depth = internal_format == GL_DEPTH_COMPONENT
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|| internal_format == GL_DEPTH_COMPONENT16
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|| internal_format == GL_DEPTH_COMPONENT24
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|| internal_format == GL_DEPTH_COMPONENT32;
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if ((target != GL_TEXTURE_2D && target != GL_PROXY_TEXTURE_2D && internal_format_is_depth)
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|| (format == GL_DEPTH_COMPONENT && !internal_format_is_depth)
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|| (format != GL_DEPTH_COMPONENT && internal_format_is_depth))
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return Error::from_errno(GL_INVALID_OPERATION);
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}
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return get_format_specification(format, type);
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}
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GPU::PixelType get_format_specification(GLenum format, GLenum type)
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{
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auto get_format = [](GLenum format) -> GPU::PixelFormat {
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switch (format) {
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case GL_ALPHA:
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return GPU::PixelFormat::Alpha;
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case GL_BGR:
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return GPU::PixelFormat::BGR;
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case GL_BGRA:
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return GPU::PixelFormat::BGRA;
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case GL_BLUE:
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return GPU::PixelFormat::Blue;
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case GL_COLOR_INDEX:
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return GPU::PixelFormat::ColorIndex;
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case GL_DEPTH_COMPONENT:
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return GPU::PixelFormat::DepthComponent;
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case GL_GREEN:
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return GPU::PixelFormat::Green;
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case GL_LUMINANCE:
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return GPU::PixelFormat::Luminance;
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case GL_LUMINANCE_ALPHA:
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return GPU::PixelFormat::LuminanceAlpha;
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case GL_RED:
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return GPU::PixelFormat::Red;
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case GL_RGB:
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return GPU::PixelFormat::RGB;
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case GL_RGBA:
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return GPU::PixelFormat::RGBA;
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case GL_STENCIL_INDEX:
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return GPU::PixelFormat::StencilIndex;
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}
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VERIFY_NOT_REACHED();
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};
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auto pixel_format = get_format(format);
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switch (type) {
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case GL_BITMAP:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::Bitmap, GPU::ComponentsOrder::Normal };
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case GL_BYTE:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::Byte, GPU::ComponentsOrder::Normal };
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case GL_FLOAT:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::Float, GPU::ComponentsOrder::Normal };
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case GL_HALF_FLOAT:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::HalfFloat, GPU::ComponentsOrder::Normal };
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case GL_INT:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::Int, GPU::ComponentsOrder::Normal };
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case GL_SHORT:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::Short, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_BYTE:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::UnsignedByte, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_BYTE_2_3_3_REV:
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return { pixel_format, GPU::PixelComponentBits::B2_3_3, GPU::PixelDataType::UnsignedByte, GPU::ComponentsOrder::Reversed };
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case GL_UNSIGNED_BYTE_3_3_2:
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return { pixel_format, GPU::PixelComponentBits::B3_3_2, GPU::PixelDataType::UnsignedByte, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_INT:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::UnsignedInt, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_INT_2_10_10_10_REV:
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return { pixel_format, GPU::PixelComponentBits::B2_10_10_10, GPU::PixelDataType::UnsignedInt, GPU::ComponentsOrder::Reversed };
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case GL_UNSIGNED_INT_8_8_8_8:
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return { pixel_format, GPU::PixelComponentBits::B8_8_8_8, GPU::PixelDataType::UnsignedInt, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_INT_8_8_8_8_REV:
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return { pixel_format, GPU::PixelComponentBits::B8_8_8_8, GPU::PixelDataType::UnsignedInt, GPU::ComponentsOrder::Reversed };
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case GL_UNSIGNED_INT_10_10_10_2:
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return { pixel_format, GPU::PixelComponentBits::B10_10_10_2, GPU::PixelDataType::UnsignedInt, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_SHORT:
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return { pixel_format, GPU::PixelComponentBits::AllBits, GPU::PixelDataType::UnsignedShort, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_SHORT_1_5_5_5_REV:
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return { pixel_format, GPU::PixelComponentBits::B1_5_5_5, GPU::PixelDataType::UnsignedShort, GPU::ComponentsOrder::Reversed };
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case GL_UNSIGNED_SHORT_4_4_4_4:
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return { pixel_format, GPU::PixelComponentBits::B4_4_4_4, GPU::PixelDataType::UnsignedShort, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_SHORT_4_4_4_4_REV:
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return { pixel_format, GPU::PixelComponentBits::B4_4_4_4, GPU::PixelDataType::UnsignedShort, GPU::ComponentsOrder::Reversed };
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case GL_UNSIGNED_SHORT_5_6_5:
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return { pixel_format, GPU::PixelComponentBits::B5_6_5, GPU::PixelDataType::UnsignedShort, GPU::ComponentsOrder::Normal };
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case GL_UNSIGNED_SHORT_5_6_5_REV:
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return { pixel_format, GPU::PixelComponentBits::B5_6_5, GPU::PixelDataType::UnsignedShort, GPU::ComponentsOrder::Reversed };
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case GL_UNSIGNED_SHORT_5_5_5_1:
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return { pixel_format, GPU::PixelComponentBits::B5_5_5_1, GPU::PixelDataType::UnsignedShort, GPU::ComponentsOrder::Normal };
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}
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VERIFY_NOT_REACHED();
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}
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GPU::PixelFormat pixel_format_for_internal_format(GLenum internal_format)
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{
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// FIXME: add support for all the SRGB formats
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// Numbers 1-4 are supported deprecated values
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switch (internal_format) {
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case 1:
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case GL_ALPHA:
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case GL_ALPHA4:
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case GL_ALPHA8:
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case GL_ALPHA12:
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case GL_ALPHA16:
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case GL_COMPRESSED_ALPHA:
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return GPU::PixelFormat::Alpha;
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case GL_DEPTH_COMPONENT:
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case GL_DEPTH_COMPONENT16:
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case GL_DEPTH_COMPONENT24:
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case GL_DEPTH_COMPONENT32:
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return GPU::PixelFormat::DepthComponent;
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case GL_INTENSITY:
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case GL_INTENSITY4:
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case GL_INTENSITY8:
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case GL_INTENSITY12:
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case GL_INTENSITY16:
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case GL_COMPRESSED_INTENSITY:
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return GPU::PixelFormat::Intensity;
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case GL_LUMINANCE:
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case GL_LUMINANCE4:
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case GL_LUMINANCE8:
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case GL_LUMINANCE12:
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case GL_LUMINANCE16:
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case GL_COMPRESSED_LUMINANCE:
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return GPU::PixelFormat::Luminance;
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case 2:
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case GL_LUMINANCE_ALPHA:
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case GL_LUMINANCE4_ALPHA4:
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case GL_LUMINANCE6_ALPHA2:
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case GL_LUMINANCE8_ALPHA8:
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case GL_LUMINANCE12_ALPHA4:
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case GL_LUMINANCE12_ALPHA12:
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case GL_LUMINANCE16_ALPHA16:
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return GPU::PixelFormat::LuminanceAlpha;
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case 3:
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case GL_RGB:
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case GL_R3_G3_B2:
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case GL_RGB4:
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case GL_RGB5:
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case GL_RGB8:
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case GL_RGB10:
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case GL_RGB12:
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case GL_RGB16:
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case GL_COMPRESSED_RGB:
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return GPU::PixelFormat::RGB;
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case 4:
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case GL_RGBA:
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case GL_RGBA2:
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case GL_RGBA4:
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case GL_RGBA8:
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case GL_RGB10_A2:
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case GL_RGBA12:
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case GL_RGBA16:
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case GL_COMPRESSED_RGBA:
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return GPU::PixelFormat::RGBA;
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}
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VERIFY_NOT_REACHED();
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}
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}
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