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1757932b3a
This will cause a slight performance loss. I've left some knobs in which can be tweaked to mitigate this, but the goal is to be compatible with all games which require them.
89 lines
3.7 KiB
C++
89 lines
3.7 KiB
C++
#pragma once
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#include "gpu.h"
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#include <array>
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#include <memory>
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#include <vector>
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class HostDisplayTexture;
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class GPU_SW final : public GPU
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{
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public:
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GPU_SW();
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~GPU_SW() override;
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bool IsHardwareRenderer() const override;
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bool Initialize(HostDisplay* host_display, System* system, DMA* dma, InterruptController* interrupt_controller,
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Timers* timers) override;
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void Reset() override;
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u16 GetPixel(u32 x, u32 y) const { return m_vram[VRAM_WIDTH * y + x]; }
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const u16* GetPixelPtr(u32 x, u32 y) const { return &m_vram[VRAM_WIDTH * y + x]; }
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u16* GetPixelPtr(u32 x, u32 y) { return &m_vram[VRAM_WIDTH * y + x]; }
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void SetPixel(u32 x, u32 y, u16 value) { m_vram[VRAM_WIDTH * y + x] = value; }
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protected:
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struct SWVertex
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{
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s32 x, y;
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u8 color_r, color_g, color_b;
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u8 texcoord_x, texcoord_y;
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ALWAYS_INLINE void SetPosition(VertexPosition p)
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{
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x = p.x;
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y = p.y;
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}
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ALWAYS_INLINE void SetColorRGB24(u32 color) { std::tie(color_r, color_g, color_b) = UnpackColorRGB24(color); }
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ALWAYS_INLINE void SetTexcoord(u16 value) { std::tie(texcoord_x, texcoord_y) = UnpackTexcoord(value); }
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};
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//////////////////////////////////////////////////////////////////////////
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// Scanout
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//////////////////////////////////////////////////////////////////////////
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void CopyOut15Bit(u32 src_x, u32 src_y, u32* dst_ptr, u32 dst_stride, u32 width, u32 height, bool interlaced);
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void CopyOut24Bit(u32 src_x, u32 src_y, u32* dst_ptr, u32 dst_stride, u32 width, u32 height, bool interlaced);
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void UpdateDisplay() override;
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//////////////////////////////////////////////////////////////////////////
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// Rasterization
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//////////////////////////////////////////////////////////////////////////
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void DispatchRenderCommand() override;
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static bool IsClockwiseWinding(const SWVertex* v0, const SWVertex* v1, const SWVertex* v2);
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template<bool texture_enable, bool raw_texture_enable, bool transparency_enable, bool dithering_enable>
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void ShadePixel(u32 x, u32 y, u8 color_r, u8 color_g, u8 color_b, u8 texcoord_x, u8 texcoord_y);
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template<bool shading_enable, bool texture_enable, bool raw_texture_enable, bool transparency_enable,
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bool dithering_enable>
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void DrawTriangle(const SWVertex* v0, const SWVertex* v1, const SWVertex* v2);
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using DrawTriangleFunction = void (GPU_SW::*)(const SWVertex* v0, const SWVertex* v1, const SWVertex* v2);
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DrawTriangleFunction GetDrawTriangleFunction(bool shading_enable, bool texture_enable, bool raw_texture_enable,
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bool transparency_enable, bool dithering_enable);
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template<bool texture_enable, bool raw_texture_enable, bool transparency_enable>
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void DrawRectangle(s32 origin_x, s32 origin_y, u32 width, u32 height, u8 r, u8 g, u8 b, u8 origin_texcoord_x,
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u8 origin_texcoord_y);
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using DrawRectangleFunction = void (GPU_SW::*)(s32 origin_x, s32 origin_y, u32 width, u32 height, u8 r, u8 g, u8 b,
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u8 origin_texcoord_x, u8 origin_texcoord_y);
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DrawRectangleFunction GetDrawRectangleFunction(bool texture_enable, bool raw_texture_enable,
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bool transparency_enable);
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template<bool shading_enable, bool transparency_enable, bool dithering_enable>
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void DrawLine(const SWVertex* p0, const SWVertex* p1);
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using DrawLineFunction = void (GPU_SW::*)(const SWVertex* p0, const SWVertex* p1);
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DrawLineFunction GetDrawLineFunction(bool shading_enable, bool transparency_enable, bool dithering_enable);
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std::vector<u32> m_display_texture_buffer;
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std::unique_ptr<HostDisplayTexture> m_display_texture;
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std::array<u16, VRAM_WIDTH * VRAM_HEIGHT> m_vram;
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};
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