C++ Software Renderer/Rasterizer

Features

Resources

Example

#include "Renderer.h"
// Define a pixel shader
class PixelShader : public PixelShaderBase<PixelShader> {
public:
 static const bool InterpolateZ = true;
 static const bool InterpolateW = true;
 // Number of affine/linear variables used.
 static const int AVarCount = 3;
 // Number of perspective correct variables used.
 static const int PVarCount = 2;
 static void drawPixel(const PixelData &p)
 {
 ...
 }
};
// Define a vertex shader
class VertexShader : public VertexShaderBase<VertexShader> {
public:
 // Number of input vertex attributes used.
 static const int AttribCount = 1;
 static void processVertex(VertexShaderInput in, VertexShaderOutput *out)
 {
 // Write result to out.
 ...
 }
};
// Use the renderer
Rasterizer r;
VertexProcessor v(&r);
r.setRasterMode(RasterMode::Span);
r.setScissorRect(0, 0, 640, 480);
r.setPixelShader<PixelShader>();
v.setViewport(0, 0, 640, 480);
v.setCullMode(CullMode::CW);
v.setVertexShader<VertexShader>();
// Draw
v.setVertexAttribPointer(0, sizeof(VertexData), vertexData);
v.drawElements(DrawMode::Triangle, indexData.size(), indexData);

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