commit 1b6531ccf5dab13a6817c7519693df220d0944a1
author Lucas Dupin <dupin@google.com> Thu Jul 05 17:18:21 2018 -0700
committer Lucas Dupin <dupin@google.com> Sun Dec 02 09:27:05 2018 -0800
tree 2873750c9ee97e4bf11d557997bfe27137e16040
parent 49109214fec02f0734cbfee3c58f6974b0c694b2

Rounded corners

Test: visual
Test: /data/nativetest64/SurfaceFlinger_test/SurfaceFlinger_test
Fixes: 111514493
Change-Id: Ie8f400bbcea3e9653295ea7b75c7eef568fd76c4

libs/renderengine/gl/ProgramCache.cpp

diff --git a/libs/renderengine/gl/ProgramCache.cpp b/libs/renderengine/gl/ProgramCache.cpp
index 464fc15..d0916ad 100644
--- a/libs/renderengine/gl/ProgramCache.cpp
+++ b/libs/renderengine/gl/ProgramCache.cpp
@@ -79,7 +79,8 @@
 
 void ProgramCache::primeCache(bool useColorManagement) {
     uint32_t shaderCount = 0;
-    uint32_t keyMask = Key::BLEND_MASK | Key::OPACITY_MASK | Key::ALPHA_MASK | Key::TEXTURE_MASK;
+    uint32_t keyMask = Key::BLEND_MASK | Key::OPACITY_MASK | Key::ALPHA_MASK | Key::TEXTURE_MASK
+        | Key::ROUNDED_CORNERS_MASK;
     // Prime the cache for all combinations of the above masks,
     // leaving off the experimental color matrix mask options.
 
@@ -136,12 +137,15 @@
             .set(Key::OPACITY_MASK,
                  description.isOpaque ? Key::OPACITY_OPAQUE : Key::OPACITY_TRANSLUCENT)
             .set(Key::Key::INPUT_TRANSFORM_MATRIX_MASK,
-                 description.hasInputTransformMatrix() ? Key::INPUT_TRANSFORM_MATRIX_ON
-                                                       : Key::INPUT_TRANSFORM_MATRIX_OFF)
+                 description.hasInputTransformMatrix()
+                         ? Key::INPUT_TRANSFORM_MATRIX_ON : Key::INPUT_TRANSFORM_MATRIX_OFF)
             .set(Key::Key::OUTPUT_TRANSFORM_MATRIX_MASK,
                  description.hasOutputTransformMatrix() || description.hasColorMatrix()
                          ? Key::OUTPUT_TRANSFORM_MATRIX_ON
-                         : Key::OUTPUT_TRANSFORM_MATRIX_OFF);
+                         : Key::OUTPUT_TRANSFORM_MATRIX_OFF)
+            .set(Key::ROUNDED_CORNERS_MASK,
+                 description.cornerRadius > 0
+                         ? Key::ROUNDED_CORNERS_ON : Key::ROUNDED_CORNERS_OFF);
 
     needs.set(Key::Y410_BT2020_MASK,
               description.isY410BT2020 ? Key::Y410_BT2020_ON : Key::Y410_BT2020_OFF);
@@ -513,6 +517,10 @@
         vs << "attribute vec4 texCoords;"
            << "varying vec2 outTexCoords;";
     }
+    if (needs.hasRoundedCorners()) {
+        vs << "attribute lowp vec4 cropCoords;";
+        vs << "varying lowp vec2 outCropCoords;";
+    }
     vs << "attribute vec4 position;"
        << "uniform mat4 projection;"
        << "uniform mat4 texture;"
@@ -520,6 +528,9 @@
     if (needs.isTexturing()) {
         vs << "outTexCoords = (texture * texCoords).st;";
     }
+    if (needs.hasRoundedCorners()) {
+        vs << "outCropCoords = cropCoords.st;";
+    }
     vs << dedent << "}";
     return vs.getString();
 }
@@ -541,6 +552,27 @@
            << "varying vec2 outTexCoords;";
     }
 
+    if (needs.hasRoundedCorners()) {
+        // Rounded corners implementation using a signed distance function.
+        fs << R"__SHADER__(
+            uniform float cornerRadius;
+            uniform vec2 cropCenter;
+            varying vec2 outCropCoords;
+
+            /**
+             * This function takes the current crop coordinates and calculates an alpha value based
+             * on the corner radius and distance from the crop center.
+             */
+            float applyCornerRadius(vec2 cropCoords)
+            {
+                vec2 position = cropCoords - cropCenter;
+                vec2 dist = abs(position) + vec2(cornerRadius) - cropCenter;
+                float plane = length(max(dist, vec2(0.0)));
+                return 1.0 - clamp(plane - cornerRadius, 0.0, 1.0);
+            }
+            )__SHADER__";
+    }
+
     if (needs.getTextureTarget() == Key::TEXTURE_OFF || needs.hasAlpha()) {
         fs << "uniform vec4 color;";
     }
@@ -639,6 +671,14 @@
         }
     }
 
+    if (needs.hasRoundedCorners()) {
+        if (needs.isPremultiplied()) {
+            fs << "gl_FragColor *= vec4(applyCornerRadius(outCropCoords));";
+        } else {
+            fs << "gl_FragColor.a *= applyCornerRadius(outCropCoords);";
+        }
+    }
+
     fs << dedent << "}";
     return fs.getString();
 }