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LibGL+LibGPU+LibSoftGPU: Implement flexible pixel format conversion

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A GPU (driver) is now responsible for reading and writing pixels from
and to user data. The client (LibGL) is responsible for specifying how
the user data must be interpreted or written to.

This allows us to centralize all pixel format conversion in one class,
`LibSoftGPU::PixelConverter`. For both the input and output image, it
takes a specification containing the image dimensions, the pixel type
and the selection (basically a clipping rect), and converts the pixels
from the input image to the output image.

Effectively this means we now support almost all OpenGL 1.5 formats,
and all custom logic has disappeared from:
  - `glDrawPixels`
  - `glReadPixels`
  - `glTexImage2D`
  - `glTexSubImage2D`

The new logic is still unoptimized, but on my machine I experienced no
noticeable slowdown. :^)
This commit is contained in:
Jelle Raaijmakers 2022-08-24 23:47:49 +02:00 • committed by Andreas Kling
parent d7cfdfe633
commit eb7c3d16fb
24 changed files with 1350 additions and 705 deletions
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11
Userland/Libraries/LibGL/Tex/Texture2D.h
View file

@ -1,6 +1,7 @@
/*
* Copyright (c) 2021, Jesse Buhagiar <jooster669@gmail.com>
* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
* Copyright (c) 2022, Jelle Raaijmakers <jelle@gmta.nl>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
@ -10,13 +11,11 @@
#include "Texture.h"
#include <AK/Array.h>
#include <AK/RefCounted.h>
#include <AK/Vector.h>
#include <LibGL/GL/gl.h>
#include <LibGL/Tex/MipMap.h>
#include <LibGL/Tex/Sampler2D.h>
#include <LibGfx/Vector2.h>
#include <LibGfx/Vector4.h>
#include <LibGPU/ImageDataLayout.h>
#include <LibGfx/Vector3.h>
namespace GL {
@ -28,8 +27,8 @@ public:
virtual bool is_texture_2d() const override { return true; }
void upload_texture_data(GLuint lod, GLint internal_format, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid const* pixels, GLsizei pixels_per_row, u8 byte_alignment);
void replace_sub_texture_data(GLuint lod, GLint xoffset, GLint yoffset, GLsizei width, GLsizei height, GLenum format, GLenum type, GLvoid const* pixels, GLsizei pixels_per_row, u8 byte_alignment);
void upload_texture_data(GLuint lod, GLenum internal_format, GPU::ImageDataLayout input_layout, GLvoid const* pixels);
void replace_sub_texture_data(GLuint lod, GPU::ImageDataLayout input_layout, Vector3<i32> const& output_offset, GLvoid const* pixels);
MipMap const& mipmap(unsigned lod) const
{