Add missing `tile_clip` shader to `resources`.

Closes #301.

resources/MANIFEST

@@ -19,6 +19,8 @@ shaders/gl3/stencil.fs.glsl
 shaders/gl3/stencil.vs.glsl
 shaders/gl3/tile.fs.glsl
 shaders/gl3/tile.vs.glsl
+shaders/gl3/tile_clip.fs.glsl
+shaders/gl3/tile_clip.vs.glsl
 shaders/gl3/tile_copy.fs.glsl
 shaders/gl3/tile_copy.vs.glsl
 shaders/metal/blit.fs.metal

resources/shaders/gl3/tile_clip.fs.glsl

@@ -0,0 +1,29 @@
+#version {{version}}
+// Automatically generated from files in pathfinder/shaders/. Do not edit!
+
+
+
+
+
+
+
+
+
+
+
+
+precision highp float;
+precision highp sampler2D;
+
+uniform sampler2D uSrc;
+
+in vec2 vTexCoord;
+in float vBackdrop;
+
+out vec4 oFragColor;
+
+void main(){
+    float alpha = clamp(abs(texture(uSrc, vTexCoord). r + vBackdrop), 0.0, 1.0);
+    oFragColor = vec4(alpha, 0.0, 0.0, 1.0);
+}
+

resources/shaders/gl3/tile_clip.vs.glsl

@@ -0,0 +1,33 @@
+#version {{version}}
+// Automatically generated from files in pathfinder/shaders/. Do not edit!
+
+
+
+
+
+
+
+
+
+
+
+
+precision highp float;
+precision highp sampler2D;
+
+in ivec2 aTileOffset;
+in ivec2 aDestTileOrigin;
+in ivec2 aSrcTileOrigin;
+in int aSrcBackdrop;
+
+out vec2 vTexCoord;
+out float vBackdrop;
+
+void main(){
+    vec2 destPosition = vec2(aDestTileOrigin + aTileOffset)/ vec2(256.0);
+    vec2 srcPosition = vec2(aSrcTileOrigin + aTileOffset)/ vec2(256.0);
+    vTexCoord = srcPosition;
+    vBackdrop = float(aSrcBackdrop);
+    gl_Position = vec4(mix(vec2(- 1.0), vec2(1.0), destPosition), 0.0, 1.0);
+}
+

resources/shaders/metal/tile_clip.fs.metal

@@ -0,0 +1,31 @@
+// Automatically generated from files in pathfinder/shaders/. Do not edit!
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+using namespace metal;
+
+struct spvDescriptorSetBuffer0
+{
+    texture2d<float> uSrc [[id(0)]];
+    sampler uSrcSmplr [[id(1)]];
+};
+
+struct main0_out
+{
+    float4 oFragColor [[color(0)]];
+};
+
+struct main0_in
+{
+    float2 vTexCoord [[user(locn0)]];
+    float vBackdrop [[user(locn1)]];
+};
+
+fragment main0_out main0(main0_in in [[stage_in]], constant spvDescriptorSetBuffer0& spvDescriptorSet0 [[buffer(0)]])
+{
+    main0_out out = {};
+    float alpha = fast::clamp(abs(spvDescriptorSet0.uSrc.sample(spvDescriptorSet0.uSrcSmplr, in.vTexCoord).x + in.vBackdrop), 0.0, 1.0);
+    out.oFragColor = float4(alpha, 0.0, 0.0, 1.0);
+    return out;
+}
+

resources/shaders/metal/tile_clip.vs.metal

@@ -0,0 +1,32 @@
+// Automatically generated from files in pathfinder/shaders/. Do not edit!
+#include <metal_stdlib>
+#include <simd/simd.h>
+
+using namespace metal;
+
+struct main0_out
+{
+    float2 vTexCoord [[user(locn0)]];
+    float vBackdrop [[user(locn1)]];
+    float4 gl_Position [[position]];
+};
+
+struct main0_in
+{
+    int2 aTileOffset [[attribute(0)]];
+    int2 aDestTileOrigin [[attribute(1)]];
+    int2 aSrcTileOrigin [[attribute(2)]];
+    int aSrcBackdrop [[attribute(3)]];
+};
+
+vertex main0_out main0(main0_in in [[stage_in]])
+{
+    main0_out out = {};
+    float2 destPosition = float2(in.aDestTileOrigin + in.aTileOffset) / float2(256.0);
+    float2 srcPosition = float2(in.aSrcTileOrigin + in.aTileOffset) / float2(256.0);
+    out.vTexCoord = srcPosition;
+    out.vBackdrop = float(in.aSrcBackdrop);
+    out.gl_Position = float4(mix(float2(-1.0), float2(1.0), destPosition), 0.0, 1.0);
+    return out;
+}
+