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graphicsdriver/metal: Use template specialization

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This commit is contained in:
Hajime Hoshi 2019-02-14 09:57:39 +09:00
parent 04dc1faa9c
commit 5c7f34827f
1 changed files with 14 additions and 13 deletions
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27
internal/graphicsdriver/metal/driver.go
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@ -100,21 +100,22 @@ float FloorMod(float x, float y) {
}
template<uint8_t address>
float2 AdjustTexelByAddress(float2 p, float4 tex_region) {
if (address == ADDRESS_CLAMP_TO_ZERO) {
return p;
}
if (address == ADDRESS_REPEAT) {
float2 o = float2(tex_region[0], tex_region[1]);
float2 size = float2(tex_region[2] - tex_region[0], tex_region[3] - tex_region[1]);
return float2(FloorMod((p.x - o.x), size.x) + o.x, FloorMod((p.y - o.y), size.y) + o.y);
}
// Not reached.
return 0.0;
float2 AdjustTexelByAddress(float2 p, float4 tex_region);
template<>
float2 AdjustTexelByAddress<ADDRESS_CLAMP_TO_ZERO>(float2 p, float4 tex_region) {
return p;
}
template<>
float2 AdjustTexelByAddress<ADDRESS_REPEAT>(float2 p, float4 tex_region) {
float2 o = float2(tex_region[0], tex_region[1]);
float2 size = float2(tex_region[2] - tex_region[0], tex_region[3] - tex_region[1]);
return float2(FloorMod((p.x - o.x), size.x) + o.x, FloorMod((p.y - o.y), size.y) + o.y);
}
template<uint8_t filter, uint8_t address>
float4 fragmentShader(
float4 FragmentShaderImpl(
VertexOut v,
texture2d<float> texture,
constant float4x4& color_matrix_body,
@ -214,7 +215,7 @@ float4 fragmentShader(
constant float4x4& color_matrix_body [[buffer(2)]], \
constant float4& color_matrix_translation [[buffer(3)]], \
constant float& scale [[buffer(4)]]) { \
return fragmentShader<filter, address>( \
return FragmentShaderImpl<filter, address>( \
v, texture, color_matrix_body, color_matrix_translation, scale); \
}