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PICA: Start implementing GPU vertex fetch

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wheremyfoodat 2024-08-21 00:47:57 +03:00
parent 652b600884
commit e13ef42b65
9 changed files with 117 additions and 8 deletions
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19
include/PICA/draw_acceleration.hpp Normal file
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@ -0,0 +1,19 @@
#pragma once
#include <array>
#include "helpers.hpp"
namespace PICA {
struct DrawAcceleration {
u8* vertexBuffer;
u8* indexBuffer;
// Minimum and maximum index in the index buffer for a draw call
u16 minimumIndex, maximumIndex;
u32 vertexDataSize;
bool canBeAccelerated;
bool indexed;
};
} // namespace PICA

2
include/PICA/gpu.hpp
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@ -1,6 +1,7 @@
#pragma once
#include <array>
#include "PICA/draw_acceleration.hpp"
#include "PICA/dynapica/shader_rec.hpp"
#include "PICA/float_types.hpp"
#include "PICA/pica_vertex.hpp"
@ -87,6 +88,7 @@ class GPU {
std::unique_ptr<Renderer> renderer;
PICA::Vertex getImmediateModeVertex();
void getAcceleratedDrawInfo(PICA::DrawAcceleration& accel, bool indexed);
public:
// 256 entries per LUT with each LUT as its own row forming a 2D image 256 * LUT_COUNT
// Encoded in PICA native format

5
include/renderer.hpp
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@ -1,9 +1,10 @@
#pragma once
#include <array>
#include <optional>
#include <span>
#include <string>
#include <optional>
#include "PICA/draw_acceleration.hpp"
#include "PICA/pica_vertex.hpp"
#include "PICA/regs.hpp"
#include "helpers.hpp"
@ -83,7 +84,7 @@ class Renderer {
// It is responsible for things like looking up which vertex/fragment shaders to use, recompiling them if they don't exist, choosing between
// ubershaders and shadergen, and so on.
// Returns whether this draw is eligible for using hardware-accelerated shaders or if shaders should run on the CPU
virtual bool prepareForDraw(ShaderUnit& shaderUnit, bool isImmediateMode) { return false; }
virtual bool prepareForDraw(ShaderUnit& shaderUnit, PICA::DrawAcceleration* accel, bool isImmediateMode) { return false; }
// Functions for initializing the graphics context for the Qt frontend, where we don't have the convenience of SDL_Window
#ifdef PANDA3DS_FRONTEND_QT

4
include/renderer_gl/renderer_gl.hpp
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@ -135,6 +135,8 @@ class RendererGL final : public Renderer {
void updateFogLUT();
void initGraphicsContextInternal();
void accelerateVertexUpload(ShaderUnit& shaderUnit, PICA::DrawAcceleration* accel);
public:
RendererGL(GPU& gpu, const std::array<u32, regNum>& internalRegs, const std::array<u32, extRegNum>& externalRegs)
: Renderer(gpu, internalRegs, externalRegs), fragShaderGen(PICA::ShaderGen::API::GL, PICA::ShaderGen::Language::GLSL) {}
@ -152,7 +154,7 @@ class RendererGL final : public Renderer {
virtual bool supportsShaderReload() override { return true; }
virtual std::string getUbershader() override;
virtual void setUbershader(const std::string& shader) override;
virtual bool prepareForDraw(ShaderUnit& shaderUnit, bool isImmediateMode) override;
virtual bool prepareForDraw(ShaderUnit& shaderUnit, PICA::DrawAcceleration* accel, bool isImmediateMode) override;
std::optional<ColourBuffer> getColourBuffer(u32 addr, PICA::ColorFmt format, u32 width, u32 height, bool createIfnotFound = true);