shaders.h

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// Software Rendering Pipeline (SRP) library
// Licensed under GNU GPLv3
 
#pragma once
 
#include <stdbool.h>
#include "srp/vertex.h"
 
typedef struct SRPUniform SRPUniform;
 
 
typedef struct SRPVertexShaderIn
{
    SRPUniform* uniform;  
    SRPVertex* vertex;    
    size_t vertexID;      
} SRPVertexShaderIn;
 
typedef struct SRPVertexShaderOut
{
    union {
        float clipPosition[4];  
        float ndcPosition[4];   
    };
    SRPVarying* varyings;   
} SRPVertexShaderOut;
 
typedef struct SRPVertexShader
{
    void (*shader)(SRPVertexShaderIn* in, SRPVertexShaderOut* out);
    size_t nVaryings;
    SRPVaryingInfo* varyingsInfo;
    size_t varyingsSize;
} SRPVertexShader;
 
 
typedef struct SRPFragmentShaderIn
{
    SRPUniform* uniform;        
    SRPInterpolated* varyings;  
    float fragCoord[4];         
    bool frontFacing;           
    size_t primitiveID;         
} SRPFragmentShaderIn;
 
typedef struct SRPFragmentShaderOut
{
    float color[4];   
    float fragDepth;  
} SRPFragmentShaderOut;
 
typedef struct SRPFragmentShader
{
    void (*shader)(SRPFragmentShaderIn* in, SRPFragmentShaderOut* out);
    bool mayOverwriteDepth;
} SRPFragmentShader;
 
 
typedef struct SRPShaderProgram
{
    SRPUniform* uniform;    
    SRPVertexShader* vs;    
    SRPFragmentShader* fs;  
} SRPShaderProgram;