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GPU: Implement CLUT cache (SW renderer only)

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Fixes copyright screen in Shadow Master.
Fixes title splash in Castrol Honda Superbike Racing.
This commit is contained in:
Stenzek
2024-05-01 13:51:01 +10:00
parent d1483d8077
commit 1185f8f6aa
13 changed files with 159 additions and 35 deletions
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20
src/core/gpu.h
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@ -1,4 +1,4 @@
// SPDX-FileCopyrightText: 2019-2022 Connor McLaughlin <stenzek@gmail.com>
// SPDX-FileCopyrightText: 2019-2024 Connor McLaughlin <stenzek@gmail.com>
// SPDX-License-Identifier: (GPL-3.0 OR CC-BY-NC-ND-4.0)
#pragma once
@ -200,7 +200,7 @@ public:
bool DumpVRAMToFile(const char* filename);
// Ensures all buffered vertices are drawn.
virtual void FlushRender();
virtual void FlushRender() = 0;
ALWAYS_INLINE const void* GetDisplayTextureHandle() const { return m_display_texture; }
ALWAYS_INLINE s32 GetDisplayWidth() const { return m_display_width; }
@ -225,6 +225,9 @@ public:
/// Draws the current display texture, with any post-processing.
bool PresentDisplay();
/// Reads the CLUT from the specified coordinates, accounting for wrap-around.
static void ReadCLUT(u16* dest, GPUTexturePaletteReg reg, bool clut_is_8bit);
protected:
TickCount CRTCTicksToSystemTicks(TickCount crtc_ticks, TickCount fractional_ticks) const;
TickCount SystemTicksToCRTCTicks(TickCount sysclk_ticks, TickCount* fractional_ticks) const;
@ -306,14 +309,17 @@ protected:
void ExecuteCommands();
void TryExecuteCommands();
void HandleGetGPUInfoCommand(u32 value);
void UpdateCLUTIfNeeded(GPUTextureMode texmode, GPUTexturePaletteReg clut);
void InvalidateCLUT();
// Rendering in the backend
virtual void ReadVRAM(u32 x, u32 y, u32 width, u32 height);
virtual void FillVRAM(u32 x, u32 y, u32 width, u32 height, u32 color);
virtual void UpdateVRAM(u32 x, u32 y, u32 width, u32 height, const void* data, bool set_mask, bool check_mask);
virtual void CopyVRAM(u32 src_x, u32 src_y, u32 dst_x, u32 dst_y, u32 width, u32 height);
virtual void DispatchRenderCommand();
virtual void UpdateDisplay();
virtual void DispatchRenderCommand() = 0;
virtual void UpdateCLUT(GPUTexturePaletteReg reg, bool clut_is_8bit) = 0;
virtual void UpdateDisplay() = 0;
virtual void DrawRendererStats();
ALWAYS_INLINE_RELEASE void AddDrawTriangleTicks(s32 x1, s32 y1, s32 x2, s32 y2, s32 x3, s32 y3, bool shaded,
@ -568,6 +574,11 @@ protected:
/// GPUREAD value for non-VRAM-reads.
u32 m_GPUREAD_latch = 0;
// These are the bits from the palette register, but zero extended to 32-bit, so we can have an "invalid" value.
// If an extra byte is ever not needed here for padding, the 8-bit flag could be packed into the MSB of this value.
u32 m_current_clut_reg_bits = {};
bool m_current_clut_is_8bit = false;
/// True if currently executing/syncing.
bool m_executing_commands = false;
@ -693,3 +704,4 @@ private:
extern std::unique_ptr<GPU> g_gpu;
extern u16 g_vram[VRAM_SIZE / sizeof(u16)];
extern u16 g_gpu_clut[GPU_CLUT_SIZE];