bd08b1815f
It is implemented in the way identical to how it works in CPU painter: 1. SampleUnderCorners command saves pixels within corners into a texture. 2. BlitCornerClipping command uses the texture prepared earlier to restore pixels within corners.
121 lines
2.6 KiB
C++
121 lines
2.6 KiB
C++
/*
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* Copyright (c) 2023, Aliaksandr Kalenik <kalenik.aliaksandr@gmail.com>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Vector.h>
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#ifdef AK_OS_MACOS
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# define GL_SILENCE_DEPRECATION
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# include <OpenGL/OpenGL.h>
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# include <OpenGL/gl3.h>
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#else
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# include <GL/gl.h>
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#endif
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#include <LibGfx/Forward.h>
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#include <LibGfx/Rect.h>
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namespace AccelGfx::GL {
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enum class ShaderType {
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Vertex,
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Fragment,
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};
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struct Shader {
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GLuint id;
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};
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struct Program {
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GLuint id;
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};
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struct VertexAttribute {
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GLint id;
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};
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struct Uniform {
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GLint id;
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};
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struct Texture {
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GLuint id;
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Optional<Gfx::IntSize> size;
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};
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struct Buffer {
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GLuint id;
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};
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struct VertexArray {
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GLuint id;
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};
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struct Framebuffer {
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GLuint fbo_id;
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GL::Texture texture;
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};
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void set_viewport(Gfx::IntRect);
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enum class BlendFactor {
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Zero,
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One,
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OneMinusSrcAlpha,
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SrcAlpha,
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};
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void enable_blending(BlendFactor source, BlendFactor destination, BlendFactor source_alpha, BlendFactor destination_alpha);
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void read_pixels(Gfx::IntRect, Gfx::Bitmap&);
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Shader create_shader(ShaderType type, char const* source);
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Program create_program(Shader const& vertex_shader, Shader const& fragment_shader);
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void use_program(Program const&);
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VertexAttribute get_attribute_location(Program const&, char const* name);
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Uniform get_uniform_location(Program const&, char const* name);
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void delete_program(Program const&);
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Texture create_texture();
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void bind_texture(Texture const&);
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void upload_texture_data(Texture& texture, Gfx::Bitmap const& bitmap);
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void delete_texture(Texture const&);
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void set_uniform(Uniform const& uniform, int);
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void set_uniform(Uniform const& uniform, float, float);
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void set_uniform(Uniform const& uniform, float, float, float, float);
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void set_vertex_attribute(VertexAttribute const& attribute, u32 offset, int number_of_components);
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enum class ScalingMode {
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Nearest,
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Linear,
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};
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void set_texture_scale_mode(ScalingMode);
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void clear_color(Gfx::Color const&);
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enum class DrawPrimitive {
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Triangles,
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TriangleFan,
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};
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void draw_arrays(DrawPrimitive, size_t count);
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Buffer create_buffer();
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void bind_buffer(Buffer const&);
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void upload_to_buffer(Buffer const&, Span<float> values);
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void delete_buffer(Buffer const&);
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VertexArray create_vertex_array();
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void bind_vertex_array(VertexArray const&);
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void delete_vertex_array(VertexArray const&);
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Framebuffer create_framebuffer(Gfx::IntSize);
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void bind_framebuffer(Framebuffer const& framebuffer);
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void delete_framebuffer(Framebuffer const& framebuffer);
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void enable_scissor_test(Gfx::IntRect);
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void disable_scissor_test();
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}
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