From ef94c6f88fbb1deb095b1494378befcdb9722839 Mon Sep 17 00:00:00 2001
From: ztenghui <ztenghui@google.com>
Date: Thu, 13 Feb 2014 17:09:45 -0800
Subject: Separate spot and ambient shadow strength setting

Change-Id: I4530e618b09a7f44b5382f8a40646c0ebf5f214c
---
 libs/hwui/Caches.cpp         | 13 +++++++++----
 libs/hwui/Caches.h           |  3 ++-
 libs/hwui/OpenGLRenderer.cpp | 33 +++++++++++++++++++--------------
 3 files changed, 30 insertions(+), 19 deletions(-)

(limited to 'libs')

diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index 8bd9de0..21cf658 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -685,7 +685,8 @@ void Caches::initTempProperties() {
     propertyDirtyViewport = false;
     propertyEnable3d = false;
     propertyCameraDistance = 1.0f;
-    propertyShadowStrength = 0x3f;
+    propertyAmbientShadowStrength = 0x3f;
+    propertySpotShadowStrength = 0x3f;
 
     propertyLightPosXScale = 0.5f;
     propertyLightPosYScale = 0.0f;
@@ -704,9 +705,13 @@ void Caches::setTempProperty(const char* name, const char* value) {
         propertyDirtyViewport = true;
         ALOGD("camera dist multiplier = %.2f", propertyCameraDistance);
         return;
-    } else if (!strcmp(name, "shadowStrength")) {
-        propertyShadowStrength = atoi(value);
-        ALOGD("shadow strength = 0x%x out of 0xff", propertyShadowStrength);
+    } else if (!strcmp(name, "ambientShadowStrength")) {
+        propertyAmbientShadowStrength = atoi(value);
+        ALOGD("ambient shadow strength = 0x%x out of 0xff", propertyAmbientShadowStrength);
+        return;
+    } else if (!strcmp(name, "spotShadowStrength")) {
+        propertySpotShadowStrength = atoi(value);
+        ALOGD("spot shadow strength = 0x%x out of 0xff", propertySpotShadowStrength);
         return;
     } else if (!strcmp(name, "lightPosXScale")) {
         propertyLightPosXScale = fmin(fmax(atof(value), 0.0), 1.0);
diff --git a/libs/hwui/Caches.h b/libs/hwui/Caches.h
index e7ba9ac..2cc15cc 100644
--- a/libs/hwui/Caches.h
+++ b/libs/hwui/Caches.h
@@ -367,7 +367,8 @@ public:
     float propertyLightPosXScale;
     float propertyLightPosYScale;
     float propertyLightPosZScale;
-    int propertyShadowStrength;
+    int propertyAmbientShadowStrength;
+    int propertySpotShadowStrength;
 
 private:
     enum OverdrawColorSet {
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index fee916b..9b253a6 100644
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -3214,7 +3214,6 @@ status_t OpenGLRenderer::drawShadow(const mat4& casterTransform, float casterAlp
     mCaches.enableScissor();
 
     SkPaint paint;
-    paint.setARGB(mCaches.propertyShadowStrength, 0, 0, 0);
     paint.setAntiAlias(true); // want to use AlphaVertex
 
     // tessellate caster outline into a 2d polygon
@@ -3238,19 +3237,25 @@ status_t OpenGLRenderer::drawShadow(const mat4& casterTransform, float casterAlp
     }
 
     // draw caster's shadows
-    VertexBuffer ambientShadowVertexBuffer;
-    ShadowTessellator::tessellateAmbientShadow(casterPolygon, casterVertexCount,
-            ambientShadowVertexBuffer);
-    drawVertexBuffer(ambientShadowVertexBuffer, &paint);
-
-    VertexBuffer spotShadowVertexBuffer;
-    Vector3 lightPosScale(mCaches.propertyLightPosXScale,
-            mCaches.propertyLightPosYScale, mCaches.propertyLightPosZScale);
-    ShadowTessellator::tessellateSpotShadow(casterPolygon, casterVertexCount,
-            lightPosScale, *currentTransform(), getWidth(), getHeight(),
-            spotShadowVertexBuffer);
-
-    drawVertexBuffer(spotShadowVertexBuffer, &paint);
+    if (mCaches.propertyAmbientShadowStrength > 0) {
+        paint.setARGB(mCaches.propertyAmbientShadowStrength, 0, 0, 0);
+        VertexBuffer ambientShadowVertexBuffer;
+        ShadowTessellator::tessellateAmbientShadow(casterPolygon, casterVertexCount,
+                ambientShadowVertexBuffer);
+        drawVertexBuffer(ambientShadowVertexBuffer, &paint);
+    }
+
+    if (mCaches.propertySpotShadowStrength > 0) {
+        paint.setARGB(mCaches.propertySpotShadowStrength, 0, 0, 0);
+        VertexBuffer spotShadowVertexBuffer;
+        Vector3 lightPosScale(mCaches.propertyLightPosXScale,
+                mCaches.propertyLightPosYScale, mCaches.propertyLightPosZScale);
+        ShadowTessellator::tessellateSpotShadow(casterPolygon, casterVertexCount,
+                lightPosScale, *currentTransform(), getWidth(), getHeight(),
+                spotShadowVertexBuffer);
+
+        drawVertexBuffer(spotShadowVertexBuffer, &paint);
+    }
 
     return DrawGlInfo::kStatusDrew;
 }
-- 
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