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GPU: Split software to frontend/backend

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This commit is contained in:
Connor McLaughlin
2020-11-21 13:32:58 +10:00
parent 03d4f80883
commit 2595e31575
20 changed files with 2035 additions and 970 deletions
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99
src/core/gpu_sw.h
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@ -1,6 +1,7 @@
#pragma once
#include "common/heap_array.h"
#include "gpu.h"
#include "gpu_sw_backend.h"
#include "host_display.h"
#include <array>
#include <memory>
@ -18,37 +19,14 @@ public:
bool Initialize(HostDisplay* host_display) override;
void Reset() override;
ALWAYS_INLINE_RELEASE u16 GetPixel(const u32 x, const u32 y) const { return m_vram[VRAM_WIDTH * y + x]; }
ALWAYS_INLINE_RELEASE const u16* GetPixelPtr(const u32 x, const u32 y) const { return &m_vram[VRAM_WIDTH * y + x]; }
ALWAYS_INLINE_RELEASE u16* GetPixelPtr(const u32 x, const u32 y) { return &m_vram[VRAM_WIDTH * y + x]; }
ALWAYS_INLINE_RELEASE void SetPixel(const u32 x, const u32 y, const u16 value) { m_vram[VRAM_WIDTH * y + x] = value; }
// this is actually (31 * 255) >> 4) == 494, but to simplify addressing we use the next power of two (512)
static constexpr u32 DITHER_LUT_SIZE = 512;
using DitherLUT = std::array<std::array<std::array<u8, 512>, DITHER_MATRIX_SIZE>, DITHER_MATRIX_SIZE>;
static constexpr DitherLUT ComputeDitherLUT();
void UpdateSettings() override;
protected:
struct SWVertex
{
s32 x, y;
u8 r, g, b;
u8 u, v;
void ReadVRAM(u32 x, u32 y, u32 width, u32 height) override;
void FillVRAM(u32 x, u32 y, u32 width, u32 height, u32 color) override;
void UpdateVRAM(u32 x, u32 y, u32 width, u32 height, const void* data) override;
void CopyVRAM(u32 src_x, u32 src_y, u32 dst_x, u32 dst_y, u32 width, u32 height) override;
ALWAYS_INLINE void SetPosition(GPUVertexPosition p, s32 offset_x, s32 offset_y)
{
x = TruncateGPUVertexPosition(offset_x + p.x);
y = TruncateGPUVertexPosition(offset_y + p.y);
}
ALWAYS_INLINE void SetColorRGB24(u32 color) { std::tie(r, g, b) = UnpackColorRGB24(color); }
ALWAYS_INLINE void SetTexcoord(u16 value) { std::tie(u, v) = UnpackTexcoord(value); }
};
//////////////////////////////////////////////////////////////////////////
// Scanout
//////////////////////////////////////////////////////////////////////////
template<HostDisplayPixelFormat display_format>
void CopyOut15Bit(u32 src_x, u32 src_y, u32 width, u32 height, u32 field, bool interlaced, bool interleaved);
void CopyOut15Bit(HostDisplayPixelFormat display_format, u32 src_x, u32 src_y, u32 width, u32 height, u32 field,
@ -63,71 +41,14 @@ protected:
void ClearDisplay() override;
void UpdateDisplay() override;
//////////////////////////////////////////////////////////////////////////
// Rasterization
//////////////////////////////////////////////////////////////////////////
void DispatchRenderCommand() override;
template<bool texture_enable, bool raw_texture_enable, bool transparency_enable, bool dithering_enable>
void ShadePixel(u32 x, u32 y, u8 color_r, u8 color_g, u8 color_b, u8 texcoord_x, u8 texcoord_y);
void FillBackendCommandParameters(GPUBackendCommand* cmd);
void FillDrawCommand(GPUBackendDrawCommand* cmd, GPURenderCommand rc);
template<bool texture_enable, bool raw_texture_enable, bool transparency_enable>
void DrawRectangle(s32 origin_x, s32 origin_y, u32 width, u32 height, u8 r, u8 g, u8 b, u8 origin_texcoord_x,
u8 origin_texcoord_y);
using DrawRectangleFunction = void (GPU_SW::*)(s32 origin_x, s32 origin_y, u32 width, u32 height, u8 r, u8 g, u8 b,
u8 origin_texcoord_x, u8 origin_texcoord_y);
DrawRectangleFunction GetDrawRectangleFunction(bool texture_enable, bool raw_texture_enable,
bool transparency_enable);
//////////////////////////////////////////////////////////////////////////
// Polygon and line rasterization ported from Mednafen
//////////////////////////////////////////////////////////////////////////
struct i_deltas
{
u32 du_dx, dv_dx;
u32 dr_dx, dg_dx, db_dx;
u32 du_dy, dv_dy;
u32 dr_dy, dg_dy, db_dy;
};
struct i_group
{
u32 u, v;
u32 r, g, b;
};
template<bool shading_enable, bool texture_enable>
bool CalcIDeltas(i_deltas& idl, const SWVertex* A, const SWVertex* B, const SWVertex* C);
template<bool shading_enable, bool texture_enable>
void AddIDeltas_DX(i_group& ig, const i_deltas& idl, u32 count = 1);
template<bool shading_enable, bool texture_enable>
void AddIDeltas_DY(i_group& ig, const i_deltas& idl, u32 count = 1);
template<bool shading_enable, bool texture_enable, bool raw_texture_enable, bool transparency_enable,
bool dithering_enable>
void DrawSpan(s32 y, s32 x_start, s32 x_bound, i_group ig, const i_deltas& idl);
template<bool shading_enable, bool texture_enable, bool raw_texture_enable, bool transparency_enable,
bool dithering_enable>
void DrawTriangle(const SWVertex* v0, const SWVertex* v1, const SWVertex* v2);
using DrawTriangleFunction = void (GPU_SW::*)(const SWVertex* v0, const SWVertex* v1, const SWVertex* v2);
DrawTriangleFunction GetDrawTriangleFunction(bool shading_enable, bool texture_enable, bool raw_texture_enable,
bool transparency_enable, bool dithering_enable);
template<bool shading_enable, bool transparency_enable, bool dithering_enable>
void DrawLine(const SWVertex* p0, const SWVertex* p1);
using DrawLineFunction = void (GPU_SW::*)(const SWVertex* p0, const SWVertex* p1);
DrawLineFunction GetDrawLineFunction(bool shading_enable, bool transparency_enable, bool dithering_enable);
std::array<u16, VRAM_WIDTH * VRAM_HEIGHT> m_vram;
HeapArray<u8, VRAM_WIDTH * VRAM_HEIGHT * sizeof(u32)> m_display_texture_buffer;
HostDisplayPixelFormat m_16bit_display_format = HostDisplayPixelFormat::RGB565;
HostDisplayPixelFormat m_24bit_display_format = HostDisplayPixelFormat::RGBA8;
GPU_SW_Backend m_backend;
};