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https://github.com/RGBCube/serenity
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a20bf80b05
Implement (anti)aliased point drawing and anti-aliased line drawing. Supported through LibGL's `GL_POINTS`, `GL_LINES`, `GL_LINE_LOOP` and `GL_LINE_STRIP`. In order to support this, `LibSoftGPU`s rasterization logic was reworked. Now, any primitive can be drawn by invoking `rasterize()` which takes care of the quad loop and fragment testing logic. Three callbacks need to be passed: * `set_coverage_mask`: the primitive needs to provide initial coverage mask information so fragments can be discarded early. * `set_quad_depth`: fragments survived stencil testing, so depth values need to be set so depth testing can take place. * `set_quad_attributes`: fragments survived depth testing, so fragment shading is going to take place. All attributes like color, tex coords and fog depth need to be set so alpha testing and eventually, fragment rasterization can take place. As of this commit, there are four instantiations of this function: * Triangle rasterization * Points - aliased * Points - anti-aliased * Lines - anti-aliased In order to standardize vertex processing for all primitive types, things like vertex transformation, lighting and tex coord generation are now taking place before clipping.
113 lines
4.8 KiB
C++
113 lines
4.8 KiB
C++
/*
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* Copyright (c) 2021, Stephan Unverwerth <s.unverwerth@serenityos.org>
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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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#pragma once
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#include <AK/Array.h>
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#include <AK/NonnullRefPtr.h>
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#include <AK/RefPtr.h>
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#include <AK/Vector.h>
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#include <LibGPU/Device.h>
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#include <LibGPU/DeviceInfo.h>
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#include <LibGPU/Enums.h>
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#include <LibGPU/Image.h>
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#include <LibGPU/ImageFormat.h>
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#include <LibGPU/Light.h>
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#include <LibGPU/LightModelParameters.h>
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#include <LibGPU/Material.h>
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#include <LibGPU/RasterPosition.h>
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#include <LibGPU/RasterizerOptions.h>
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#include <LibGPU/SamplerConfig.h>
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#include <LibGPU/StencilConfiguration.h>
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#include <LibGPU/TexCoordGenerationConfig.h>
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#include <LibGPU/Vertex.h>
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#include <LibGfx/Bitmap.h>
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#include <LibGfx/Matrix4x4.h>
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#include <LibGfx/Rect.h>
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#include <LibGfx/Vector4.h>
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#include <LibSoftGPU/AlphaBlendFactors.h>
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#include <LibSoftGPU/Buffer/FrameBuffer.h>
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#include <LibSoftGPU/Buffer/Typed2DBuffer.h>
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#include <LibSoftGPU/Clipper.h>
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#include <LibSoftGPU/Config.h>
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#include <LibSoftGPU/Sampler.h>
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#include <LibSoftGPU/Triangle.h>
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namespace SoftGPU {
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struct PixelQuad;
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class Device final : public GPU::Device {
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public:
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Device(Gfx::IntSize const& min_size);
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virtual GPU::DeviceInfo info() const override;
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virtual void draw_primitives(GPU::PrimitiveType, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform, FloatMatrix4x4 const& texture_transform, Vector<GPU::Vertex>& vertices, Vector<size_t> const& enabled_texture_units) override;
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virtual void resize(Gfx::IntSize const& min_size) override;
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virtual void clear_color(FloatVector4 const&) override;
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virtual void clear_depth(GPU::DepthType) override;
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virtual void clear_stencil(GPU::StencilType) override;
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virtual void blit_color_buffer_to(Gfx::Bitmap& target) override;
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virtual void blit_to_color_buffer_at_raster_position(Gfx::Bitmap const&) override;
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virtual void blit_to_depth_buffer_at_raster_position(Vector<GPU::DepthType> const&, int, int) override;
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virtual void set_options(GPU::RasterizerOptions const&) override;
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virtual void set_light_model_params(GPU::LightModelParameters const&) override;
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virtual GPU::RasterizerOptions options() const override { return m_options; }
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virtual GPU::LightModelParameters light_model() const override { return m_lighting_model; }
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virtual GPU::ColorType get_color_buffer_pixel(int x, int y) override;
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virtual GPU::DepthType get_depthbuffer_value(int x, int y) override;
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virtual NonnullRefPtr<GPU::Image> create_image(GPU::ImageFormat format, unsigned width, unsigned height, unsigned depth, unsigned levels, unsigned layers) override;
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virtual void set_sampler_config(unsigned, GPU::SamplerConfig const&) override;
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virtual void set_light_state(unsigned, GPU::Light const&) override;
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virtual void set_material_state(GPU::Face, GPU::Material const&) override;
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virtual void set_stencil_configuration(GPU::Face, GPU::StencilConfiguration const&) override;
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virtual GPU::RasterPosition raster_position() const override { return m_raster_position; }
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virtual void set_raster_position(GPU::RasterPosition const& raster_position) override;
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virtual void set_raster_position(FloatVector4 const& position, FloatMatrix4x4 const& model_view_transform, FloatMatrix4x4 const& projection_transform) override;
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private:
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void calculate_vertex_lighting(GPU::Vertex& vertex) const;
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void draw_statistics_overlay(Gfx::Bitmap&);
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Gfx::IntRect get_rasterization_rect_of_size(Gfx::IntSize size) const;
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template<typename CB1, typename CB2, typename CB3>
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void rasterize(Gfx::IntRect& render_bounds, CB1 set_coverage_mask, CB2 set_quad_depth, CB3 set_quad_attributes);
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void rasterize_line_aliased(GPU::Vertex&, GPU::Vertex&);
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void rasterize_line_antialiased(GPU::Vertex&, GPU::Vertex&);
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void rasterize_line(GPU::Vertex&, GPU::Vertex&);
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void rasterize_point_aliased(GPU::Vertex&);
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void rasterize_point_antialiased(GPU::Vertex&);
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void rasterize_point(GPU::Vertex&);
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void rasterize_triangle(Triangle&);
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void setup_blend_factors();
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void shade_fragments(PixelQuad&);
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bool test_alpha(PixelQuad&);
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RefPtr<FrameBuffer<GPU::ColorType, GPU::DepthType, GPU::StencilType>> m_frame_buffer {};
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GPU::RasterizerOptions m_options;
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GPU::LightModelParameters m_lighting_model;
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Clipper m_clipper;
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Vector<Triangle> m_triangle_list;
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Vector<Triangle> m_processed_triangles;
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Vector<GPU::Vertex> m_clipped_vertices;
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Array<Sampler, GPU::NUM_SAMPLERS> m_samplers;
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Vector<size_t> m_enabled_texture_units;
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AlphaBlendFactors m_alpha_blend_factors;
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Array<GPU::Light, NUM_LIGHTS> m_lights;
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Array<GPU::Material, 2u> m_materials;
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GPU::RasterPosition m_raster_position;
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Array<GPU::StencilConfiguration, 2u> m_stencil_configuration;
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};
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}
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