Merge pull request #876 from lonerOrz/feat/shader-progress-border

feat(shader): Add progress_border.frag shader source file

Shaders/frag/progress_border.frag

@@ -0,0 +1,67 @@
+#version 450
+
+layout(location = 0) in vec2 qt_TexCoord0;
+layout(location = 0) out vec4 fragColor;
+
+layout(binding = 1) uniform sampler2D source;
+
+layout(std140, binding = 0) uniform buf {
+    mat4 qt_Matrix;
+    float qt_Opacity;
+    float progress;
+    float borderWidth;
+    vec4 progressColor;
+    vec4 borderColor;
+    vec4 backgroundColor;
+    float borderRadius;
+} ubuf;
+
+void main() {
+    vec2 coord = qt_TexCoord0;
+    float p = clamp(ubuf.progress, 0.0, 1.0);
+
+    if (ubuf.borderRadius > 0.0) {
+        // Circular progress
+        vec2 center = vec2(0.5, 0.5);
+        vec2 dir = coord - center;
+        float dist = length(dir);
+
+        float outerRadius = 0.5;
+        float innerRadius = outerRadius - ubuf.borderWidth;
+
+        float angle = atan(dir.y, dir.x) + radians(90.0);
+        if (angle < 0.0) angle += radians(360.0);
+        float maxAngle = radians(360.0) * p;
+
+        bool inBorder = dist >= innerRadius && dist <= outerRadius;
+        bool inProgress = inBorder && angle <= maxAngle;
+
+        if (inProgress) {
+            fragColor = ubuf.progressColor * ubuf.qt_Opacity;
+        } else if (inBorder) {
+            fragColor = ubuf.borderColor * ubuf.qt_Opacity;
+        } else if (dist < innerRadius) {
+            fragColor = ubuf.backgroundColor * ubuf.qt_Opacity;
+        } else {
+            fragColor = vec4(0.0, 0.0, 0.0, 0.0);
+        }
+    } else {
+        // Rectangular progress
+        bool inBorder =
+            coord.x < ubuf.borderWidth ||
+            coord.x > (1.0 - ubuf.borderWidth) ||
+            coord.y < ubuf.borderWidth ||
+            coord.y > (1.0 - ubuf.borderWidth);
+
+        float progressPos = p;
+        bool inProgress = inBorder && coord.x <= progressPos;
+
+        if (inProgress) {
+            fragColor = ubuf.progressColor * ubuf.qt_Opacity;
+        } else if (inBorder) {
+            fragColor = ubuf.borderColor * ubuf.qt_Opacity;
+        } else {
+            fragColor = ubuf.backgroundColor * ubuf.qt_Opacity;
+        }
+    }
+}