vertex_processing.h

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// Software Rendering Pipeline (SRP) library
// Licensed under GNU GPLv3
 
#pragma once
 
#include "srp/shaders.h"
#include "core/buffer_p.h"
 
typedef struct VertexCacheEntry {
    bool valid;               
    SRPVertexShaderOut data;  
} VertexCacheEntry;
 
typedef struct VertexCache {
    VertexCacheEntry* entries;  
    size_t baseVertex;          
    size_t size;                
    void* varyingBlock;         
} VertexCache;
 
void allocateVertexCache(
    VertexCache* cache, const SRPIndexBuffer* ib, size_t startIndex,
    size_t vertexCount, size_t varyingSize
);
 
SRPVertexShaderOut* vertexCacheFetch(
    VertexCache* cache, size_t vertexIndex, const SRPVertexBuffer* vb,
    const SRPShaderProgram* sp
);
 
void processVertex(
    size_t vertexIndex, void* varyingBlock, size_t varyingIndex,
    const SRPVertexBuffer* vb, const SRPShaderProgram* sp, SRPVertexShaderOut* outV
);
 
void applyPerspectiveDivide(SRPVertexShaderOut* output, float* outInvW);