kc3-lang/SDL/src/render/metal/SDL_shaders_metal.metal

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• Hash : c2cc9c16
  Author :
  Date : 2017-12-09T19:48:38
  

  Backed out using pixel texture coordinates, it had weird visual side effects

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• src/render/metal/SDL_shaders_metal.metal

• #include <metal_texture>
  
  using namespace metal;
  
  struct SolidVertex
  {
  	float4 position [[position]];
  	float pointSize [[point_size]];
  };
  
  vertex SolidVertex SDL_Solid_vertex(constant float2 *position [[buffer(0)]], uint vid [[vertex_id]])
  {
      SolidVertex v;
  	v.position = float4(position[vid].x, position[vid].y, 0.0f, 1.0f);
  	v.pointSize = 0.5f;
  	return v;
  }
   
  fragment float4 SDL_Solid_fragment(constant float4 &col [[buffer(0)]])
  {
      return col;
  }
  
  struct CopyVertex
  {
      float4 position [[position]];
      float2 texcoord;
  };
  
  vertex CopyVertex SDL_Copy_vertex(constant float2 *position [[buffer(0)]], constant float2 *texcoords [[buffer(1)]], uint vid [[vertex_id]])
  {
      CopyVertex v;
      v.position = float4(position[vid].x, position[vid].y, 0.0f, 1.0f);
      v.texcoord = texcoords[vid];
      return v;
  }
  
  fragment float4 SDL_Copy_fragment_nearest(CopyVertex vert [[stage_in]], constant float4 &col [[buffer(0)]], texture2d<float> tex [[texture(0)]])
  {
      constexpr sampler s(coord::normalized, address::clamp_to_edge, filter::nearest);
      return tex.sample(s, vert.texcoord) * col;
  }
  
  fragment float4 SDL_Copy_fragment_linear(CopyVertex vert [[stage_in]], constant float4 &col [[buffer(0)]], texture2d<float> tex [[texture(0)]])
  {
      constexpr sampler s(coord::normalized, address::clamp_to_edge, filter::linear);
      return tex.sample(s, vert.texcoord) * col;
  }
  
  

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