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Commit 48daa54d authored by Romain Guy's avatar Romain Guy
Browse files

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
parent a674ab74

core/jni/android/graphics/Shader.cpp

+3 −7
Original line number Diff line number Diff line
@@ -331,13 +331,8 @@ static SkShader* ComposeShader_create2(JNIEnv* env, jobject o, 
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 @@ static SkiaShader* ComposeShader_postCreate1(JNIEnv* env, jobject o, SkShader* s 
#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);

libs/hwui/ProgramCache.cpp

+24 −7
Original line number Diff line number Diff line
@@ -137,7 +137,7 @@ const char* gFS_Footer = 
// 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 @@ const char* gPorterDuff[12] = { 
        // 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 @@ String8 ProgramCache::generateFragmentShader(const ProgramDescription& descripti 


    // 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 @@ String8 ProgramCache::generateFragmentShader(const ProgramDescription& descripti 
    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");

}

libs/hwui/ProgramCache.h

+5 −5
Original line number Diff line number Diff line
@@ -35,7 +35,7 @@ namespace uirenderer { 
///////////////////////////////////////////////////////////////////////////////



// Debug

#define DEBUG_PROGRAM_CACHE 0

#define DEBUG_PROGRAM_CACHE 1



// Debug

#if DEBUG_PROGRAM_CACHE
@@ -57,9 +57,9 @@ namespace uirenderer { 
#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 @@ private: 
    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;

tests/HwAccelerationTest/AndroidManifest.xml

+9 −0
Original line number Diff line number Diff line
@@ -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>

tests/HwAccelerationTest/src/com/google/android/test/hwui/AdvancedBlendActivity.java

0 → 100644
+138 −0
Original line number Diff line number Diff line 
/*

 * 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();

        }

    }

}