src/java.desktop/macosx/native/libawt_lwawt/awt/shaders.metal

@@ -127,24 +127,21 @@
  
  fragment unsigned int frag_stencil(StencilShaderInOut in [[stage_in]]) {
      return in.color;
  }
  
- // NOTE:
- // 1. consider to make shaders without IF-conditions
- // 2. we can pass interpolation mode via uniforms and select corresponding sampler in shader
- //  but it can cause performance problems (something like getTextureSampler(hint) will be invoked
- //  for every pixel)
- 
  fragment half4 frag_txt(
          TxtShaderInOut vert [[stage_in]],
          texture2d<float, access::sample> renderTexture [[texture(0)]],
-         constant TxtFrameUniforms& uniforms [[buffer(1)]],
-         sampler textureSampler [[sampler(0)]]
- ) {
+         constant TxtFrameUniforms& uniforms [[buffer(1)]]
+         )
+ {
+     constexpr sampler textureSampler (mag_filter::linear,
+                                   min_filter::linear);
      float4 pixelColor = renderTexture.sample(textureSampler, vert.texCoords);
      float srcA = uniforms.isSrcOpaque ? 1 : pixelColor.a;
+     // TODO: consider to make shaders without IF-conditions
      if (uniforms.mode) {
          float4 c = mix(pixelColor, uniforms.color, srcA);
          return half4(c.r, c.g, c.b , c.a);
      }
  

@@ -153,13 +150,16 @@
                   pixelColor.b, srcA*uniforms.extraAlpha);
  }
  
  fragment half4 frag_txt_tp(TxtShaderInOut vert [[stage_in]],
                         texture2d<float, access::sample> renderTexture [[texture(0)]],
-                        texture2d<float, access::sample> paintTexture [[texture(1)]],
-                        sampler textureSampler [[sampler(0)]]
- ) {
+                        texture2d<float, access::sample> paintTexture [[texture(1)]])
+ {
+     constexpr sampler textureSampler (address::repeat,
+       mag_filter::nearest,
+       min_filter::nearest);
+ 
      float4 renderColor = renderTexture.sample(textureSampler, vert.texCoords);
      float4 paintColor = paintTexture.sample(textureSampler, vert.tpCoords);
      return half4(paintColor.r*renderColor.a,
                   paintColor.g*renderColor.a,
                   paintColor.b*renderColor.a,

@@ -185,13 +185,14 @@
  }
  
  fragment half4 aa_frag_txt(
          TxtShaderInOut vert [[stage_in]],
          texture2d<float, access::sample> renderTexture [[texture(0)]],
-         constant TxtFrameUniforms& uniforms [[buffer(1)]],
-         sampler textureSampler [[sampler(0)]]
- ) {
+         constant TxtFrameUniforms& uniforms [[buffer(1)]]
+ )
+ {
+     constexpr sampler textureSampler (mag_filter::linear, min_filter::linear);
      float4 pixelColor = renderTexture.sample(textureSampler, vert.texCoords);
      return half4(pixelColor.r, pixelColor.g, pixelColor.b, pixelColor.a);
  }
  
  fragment half4 frag_grad(GradShaderInOut in [[stage_in]],