Add extra blending modes.
This change adds the following blending modes for shaders and color filters:
Add
Multiply
Screen
Overlay
Darken
Lighten
Change-Id: Iff22f5ce6041b43c71b1857d73013f5010ab3413
diff --git a/core/jni/android/graphics/Shader.cpp b/core/jni/android/graphics/Shader.cpp
index 36413d7..cb1c333 100644
--- a/core/jni/android/graphics/Shader.cpp
+++ b/core/jni/android/graphics/Shader.cpp
@@ -331,13 +331,8 @@
static SkiaShader* ComposeShader_postCreate2(JNIEnv* env, jobject o, SkShader* shader,
SkiaShader* shaderA, SkiaShader* shaderB, SkPorterDuff::Mode porterDuffMode) {
#ifdef USE_OPENGL_RENDERER
- SkAutoUnref au(SkPorterDuff::CreateXfermode(porterDuffMode));
- SkXfermode* mode = (SkXfermode*) au.get();
- SkXfermode::Mode skiaMode;
- if (!SkXfermode::IsMode(mode, &skiaMode)) {
- skiaMode = SkXfermode::kSrcOver_Mode;
- }
- return new SkiaComposeShader(shaderA, shaderB, skiaMode, shader);
+ SkXfermode::Mode mode = SkPorterDuff::ToXfermodeMode(porterDuffMode);
+ return new SkiaComposeShader(shaderA, shaderB, mode, shader);
#else
return NULL;
#endif
@@ -348,6 +343,7 @@
#ifdef USE_OPENGL_RENDERER
SkXfermode::Mode skiaMode;
if (!SkXfermode::IsMode(mode, &skiaMode)) {
+ // TODO: Support other modes
skiaMode = SkXfermode::kSrcOver_Mode;
}
return new SkiaComposeShader(shaderA, shaderB, skiaMode, shader);
diff --git a/libs/hwui/ProgramCache.cpp b/libs/hwui/ProgramCache.cpp
index 2449b6d..39fe85a 100644
--- a/libs/hwui/ProgramCache.cpp
+++ b/libs/hwui/ProgramCache.cpp
@@ -137,7 +137,7 @@
// PorterDuff snippets
///////////////////////////////////////////////////////////////////////////////
-const char* gPorterDuff[12] = {
+const char* gBlendOps[18] = {
// Clear
"return vec4(0.0, 0.0, 0.0, 0.0);\n",
// Src
@@ -161,8 +161,26 @@
// DstAtop
"return vec4(dst.rgb * src.a + (1.0 - dst.a) * src.rgb, src.a);\n",
// Xor
- "return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb, 1.0, "
+ "return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb, "
"src.a + dst.a - 2.0 * src.a * dst.a);\n",
+ // Add
+ "return min(src + dst, 1.0);\n",
+ // Multiply
+ "return src * dst;\n",
+ // Screen
+ "return src + dst - src * dst;\n",
+ // Overlay
+ "return clamp(vec4(mix("
+ "2.0 * src.rgb * dst.rgb + src.rgb * (1.0 - dst.a) + dst.rgb * (1.0 - src.a), "
+ "src.a * dst.a - 2.0 * (dst.a - dst.rgb) * (src.a - src.rgb) + src.rgb * (1.0 - dst.a) + dst.rgb * (1.0 - src.a), "
+ "step(dst.a, 2.0 * dst.rgb)), "
+ "src.a + dst.a - src.a * dst.a), 0.0, 1.0);\n",
+ // Darken
+ "return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb + "
+ "min(src.rgb * dst.a, dst.rgb * src.a), src.a + dst.a - src.a * dst.a);\n",
+ // Lighten
+ "return vec4(src.rgb * (1.0 - dst.a) + (1.0 - src.a) * dst.rgb + "
+ "max(src.rgb * dst.a, dst.rgb * src.a), src.a + dst.a - src.a * dst.a);\n",
};
///////////////////////////////////////////////////////////////////////////////
@@ -292,10 +310,10 @@
// Generate required functions
if (description.hasGradient && description.hasBitmap) {
- generatePorterDuffBlend(shader, "blendShaders", description.shadersMode);
+ generateBlend(shader, "blendShaders", description.shadersMode);
}
if (description.colorOp == ProgramDescription::kColorBlend) {
- generatePorterDuffBlend(shader, "blendColors", description.colorMode);
+ generateBlend(shader, "blendColors", description.colorMode);
}
if (description.isBitmapNpot) {
generateTextureWrap(shader, description.bitmapWrapS, description.bitmapWrapT);
@@ -354,13 +372,12 @@
return shader;
}
-void ProgramCache::generatePorterDuffBlend(String8& shader, const char* name,
- SkXfermode::Mode mode) {
+void ProgramCache::generateBlend(String8& shader, const char* name, SkXfermode::Mode mode) {
shader.append("\nvec4 ");
shader.append(name);
shader.append("(vec4 src, vec4 dst) {\n");
shader.append(" ");
- shader.append(gPorterDuff[mode]);
+ shader.append(gBlendOps[mode]);
shader.append("}\n");
}
diff --git a/libs/hwui/ProgramCache.h b/libs/hwui/ProgramCache.h
index a1a4a0e..54850ee 100644
--- a/libs/hwui/ProgramCache.h
+++ b/libs/hwui/ProgramCache.h
@@ -35,7 +35,7 @@
///////////////////////////////////////////////////////////////////////////////
// Debug
-#define DEBUG_PROGRAM_CACHE 0
+#define DEBUG_PROGRAM_CACHE 1
// Debug
#if DEBUG_PROGRAM_CACHE
@@ -57,9 +57,9 @@
#define PROGRAM_KEY_BITMAP_WRAPS_MASK 0x600
#define PROGRAM_KEY_BITMAP_WRAPT_MASK 0x1800
-// Support only the 12 Porter-Duff modes for now
-#define PROGRAM_MAX_XFERMODE 0xC
-#define PROGRAM_XFERMODE_SHADER_SHIFT 24
+// Encode the xfermodes on 6 bits
+#define PROGRAM_MAX_XFERMODE 0x1f
+#define PROGRAM_XFERMODE_SHADER_SHIFT 26
#define PROGRAM_XFERMODE_COLOR_OP_SHIFT 20
#define PROGRAM_BITMAP_WRAPS_SHIFT 9
@@ -177,7 +177,7 @@
Program* generateProgram(const ProgramDescription& description, programid key);
String8 generateVertexShader(const ProgramDescription& description);
String8 generateFragmentShader(const ProgramDescription& description);
- void generatePorterDuffBlend(String8& shader, const char* name, SkXfermode::Mode mode);
+ void generateBlend(String8& shader, const char* name, SkXfermode::Mode mode);
void generateTextureWrap(String8& shader, GLenum wrapS, GLenum wrapT);
void printLongString(const String8& shader) const;
diff --git a/tests/HwAccelerationTest/AndroidManifest.xml b/tests/HwAccelerationTest/AndroidManifest.xml
index 90c82ee..181b4c8 100644
--- a/tests/HwAccelerationTest/AndroidManifest.xml
+++ b/tests/HwAccelerationTest/AndroidManifest.xml
@@ -180,5 +180,14 @@
</intent-filter>
</activity>
+ <activity
+ android:name="AdvancedBlendActivity"
+ android:label="_AdvancedBlend">
+ <intent-filter>
+ <action android:name="android.intent.action.MAIN" />
+ <category android:name="android.intent.category.LAUNCHER" />
+ </intent-filter>
+ </activity>
+
</application>
</manifest>
diff --git a/tests/HwAccelerationTest/src/com/google/android/test/hwui/AdvancedBlendActivity.java b/tests/HwAccelerationTest/src/com/google/android/test/hwui/AdvancedBlendActivity.java
new file mode 100644
index 0000000..6c80a6d
--- /dev/null
+++ b/tests/HwAccelerationTest/src/com/google/android/test/hwui/AdvancedBlendActivity.java
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.google.android.test.hwui;
+
+import android.app.Activity;
+import android.content.Context;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.graphics.BitmapShader;
+import android.graphics.Canvas;
+import android.graphics.Color;
+import android.graphics.ComposeShader;
+import android.graphics.LinearGradient;
+import android.graphics.Matrix;
+import android.graphics.Paint;
+import android.graphics.PorterDuff;
+import android.graphics.Shader;
+import android.os.Bundle;
+import android.view.View;
+
+@SuppressWarnings({"UnusedDeclaration"})
+public class AdvancedBlendActivity extends Activity {
+ @Override
+ protected void onCreate(Bundle savedInstanceState) {
+ super.onCreate(savedInstanceState);
+
+ setContentView(new ShadersView(this));
+ }
+
+ static class ShadersView extends View {
+ private BitmapShader mScaledShader;
+ private int mTexWidth;
+ private int mTexHeight;
+ private Paint mPaint;
+ private float mDrawWidth;
+ private float mDrawHeight;
+ private LinearGradient mHorGradient;
+ private ComposeShader mComposeShader;
+ private ComposeShader mCompose2Shader;
+ private ComposeShader mCompose3Shader;
+ private ComposeShader mCompose4Shader;
+ private ComposeShader mCompose5Shader;
+ private ComposeShader mCompose6Shader;
+ private BitmapShader mScaled2Shader;
+
+ ShadersView(Context c) {
+ super(c);
+
+ Bitmap texture = BitmapFactory.decodeResource(c.getResources(), R.drawable.sunset1);
+ mTexWidth = texture.getWidth();
+ mTexHeight = texture.getHeight();
+ mDrawWidth = mTexWidth * 2.2f;
+ mDrawHeight = mTexHeight * 1.2f;
+
+ mScaledShader = new BitmapShader(texture, Shader.TileMode.MIRROR,
+ Shader.TileMode.MIRROR);
+ Matrix m2 = new Matrix();
+ m2.setScale(0.5f, 0.5f);
+ mScaledShader.setLocalMatrix(m2);
+
+ mScaled2Shader = new BitmapShader(texture, Shader.TileMode.MIRROR,
+ Shader.TileMode.MIRROR);
+ Matrix m3 = new Matrix();
+ m3.setScale(0.1f, 0.1f);
+ mScaled2Shader.setLocalMatrix(m3);
+
+ mHorGradient = new LinearGradient(0.0f, 0.0f, mDrawWidth, 0.0f,
+ Color.BLACK, Color.WHITE, Shader.TileMode.CLAMP);
+
+ mComposeShader = new ComposeShader(mScaledShader, mHorGradient,
+ PorterDuff.Mode.DARKEN);
+ mCompose2Shader = new ComposeShader(mScaledShader, mHorGradient,
+ PorterDuff.Mode.LIGHTEN);
+ mCompose3Shader = new ComposeShader(mScaledShader, mHorGradient,
+ PorterDuff.Mode.MULTIPLY);
+ mCompose4Shader = new ComposeShader(mScaledShader, mHorGradient,
+ PorterDuff.Mode.SCREEN);
+ mCompose5Shader = new ComposeShader(mScaledShader, mHorGradient,
+ PorterDuff.Mode.ADD);
+ mCompose6Shader = new ComposeShader(mHorGradient, mScaledShader,
+ PorterDuff.Mode.OVERLAY);
+
+ mPaint = new Paint();
+ }
+
+ @Override
+ protected void onDraw(Canvas canvas) {
+ super.onDraw(canvas);
+ canvas.drawRGB(255, 255, 255);
+
+ canvas.save();
+ canvas.translate(40.0f, 40.0f);
+
+ mPaint.setShader(mComposeShader);
+ canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
+
+ canvas.translate(0.0f, 40.0f + mDrawHeight);
+ mPaint.setShader(mCompose2Shader);
+ canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
+
+ canvas.translate(0.0f, 40.0f + mDrawHeight);
+ mPaint.setShader(mCompose3Shader);
+ canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
+
+ canvas.restore();
+
+ canvas.save();
+ canvas.translate(40.0f + mDrawWidth + 40.0f, 40.0f);
+
+ mPaint.setShader(mCompose4Shader);
+ canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
+
+ canvas.translate(0.0f, 40.0f + mDrawHeight);
+ mPaint.setShader(mCompose5Shader);
+ canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
+
+ canvas.translate(0.0f, 40.0f + mDrawHeight);
+ mPaint.setShader(mCompose6Shader);
+ canvas.drawRect(0.0f, 0.0f, mDrawWidth, mDrawHeight, mPaint);
+
+ canvas.restore();
+ }
+ }
+}