Merge "Optimised hwui rounded corners shader" am: d7287c96eb am: ed7bdd6549

am: 92ef0a59f8

Change-Id: I9f5e6ef057ba6049804226d65f2f2f06594efc69

1 files changed, 11 insertions, 5 deletions

diff --git a/libs/hwui/renderstate/RenderState.cpp b/libs/hwui/renderstate/RenderState.cpp
index 481932dd7967..2c92924cc12c 100644
--- a/libs/hwui/renderstate/RenderState.cpp
+++ b/libs/hwui/renderstate/RenderState.cpp
@@ -296,14 +296,20 @@ void RenderState::render(const Glop& glop, const Matrix4& orthoMatrix) {
         // TODO: avoid query, and cache values (or RRCS ptr) in program
         const RoundRectClipState* state = glop.roundRectClipState;
         const Rect& innerRect = state->innerRect;
-        glUniform4f(fill.program->getUniform("roundRectInnerRectLTRB"),
-                innerRect.left, innerRect.top,
-                innerRect.right, innerRect.bottom);
-        glUniformMatrix4fv(fill.program->getUniform("roundRectInvTransform"),
-                1, GL_FALSE, &state->matrix.data[0]);
 
         // add half pixel to round out integer rect space to cover pixel centers
         float roundedOutRadius = state->radius + 0.5f;
+
+        // Divide by the radius to simplify the calculations in the fragment shader
+        // roundRectPos is also passed from vertex shader relative to top/left & radius
+        glUniform4f(fill.program->getUniform("roundRectInnerRectLTWH"),
+                innerRect.left / roundedOutRadius, innerRect.top / roundedOutRadius,
+                (innerRect.right - innerRect.left) / roundedOutRadius,
+                (innerRect.bottom - innerRect.top) / roundedOutRadius);
+
+        glUniformMatrix4fv(fill.program->getUniform("roundRectInvTransform"),
+                1, GL_FALSE, &state->matrix.data[0]);
+
         glUniform1f(fill.program->getUniform("roundRectRadius"),
                 roundedOutRadius);
     }