Reduce gradients textures size whenever possible (320d46bf) · Commits · e / os / android_frameworks_base

libs/hwui/GradientCache.cpp

+7 −2

Original line number	Diff line number	Diff line
		@@ -18,6 +18,7 @@

		#include <utils/threads.h>

		#include "Caches.h"
		#include "Debug.h"
		#include "GradientCache.h"
		#include "Properties.h"
		@@ -128,9 +129,13 @@ void GradientCache::clear() {

		void GradientCache::getGradientInfo(const uint32_t* colors, const int count,
		GradientInfo& info) {
		uint32_t width = 1 << (31 - __builtin_clz(256 * (count - 1)));
		bool hasAlpha = false;
		uint32_t width = 256 * (count - 1);

		if (!Caches::getInstance().extensions.hasNPot()) {
		width = 1 << (31 - __builtin_clz(width));
		}

		bool hasAlpha = false;
		for (int i = 0; i < count; i++) {
		if (((colors[i] >> 24) & 0xff) < 255) {
		hasAlpha = true;

libs/hwui/ProgramCache.cpp

+7 −9

Original line number	Diff line number	Diff line
		@@ -69,12 +69,10 @@ const char* gVS_Header_Varyings_HasBitmap =
		"varying highp vec2 outBitmapTexCoords;\n";
		const char* gVS_Header_Varyings_PointHasBitmap =
		"varying highp vec2 outPointBitmapTexCoords;\n";
		// TODO: These values are used to sample from textures,
		// they may need to be highp
		const char* gVS_Header_Varyings_HasGradient[6] = {
		// Linear
		"varying highp vec2 linear;\n",
		"varying highp float linear;\n",
		"varying float linear;\n",

		// Circular
		"varying highp vec2 circular;\n",
		@@ -268,21 +266,21 @@ const char* gFS_Main_FetchA8Texture[2] = {
		};
		const char* gFS_Main_FetchGradient[6] = {
		// Linear
		" highp vec4 gradientColor = texture2D(gradientSampler, linear);\n",
		" vec4 gradientColor = texture2D(gradientSampler, linear);\n",

		" highp vec4 gradientColor = mix(startColor, endColor, clamp(linear, 0.0, 1.0));\n",
		" vec4 gradientColor = mix(startColor, endColor, clamp(linear, 0.0, 1.0));\n",

		// Circular
		" highp vec4 gradientColor = texture2D(gradientSampler, vec2(length(circular), 0.5));\n",
		" vec4 gradientColor = texture2D(gradientSampler, vec2(length(circular), 0.5));\n",

		" highp vec4 gradientColor = mix(startColor, endColor, clamp(length(circular), 0.0, 1.0));\n",
		" vec4 gradientColor = mix(startColor, endColor, clamp(length(circular), 0.0, 1.0));\n",

		// Sweep
		" highp float index = atan(sweep.y, sweep.x) * 0.15915494309; // inv(2 * PI)\n"
		" highp vec4 gradientColor = texture2D(gradientSampler, vec2(index - floor(index), 0.5));\n",
		" vec4 gradientColor = texture2D(gradientSampler, vec2(index - floor(index), 0.5));\n",

		" highp float index = atan(sweep.y, sweep.x) * 0.15915494309; // inv(2 * PI)\n"
		" highp vec4 gradientColor = mix(startColor, endColor, clamp(index - floor(index), 0.0, 1.0));\n"
		" vec4 gradientColor = mix(startColor, endColor, clamp(index - floor(index), 0.0, 1.0));\n"
		};
		const char* gFS_Main_FetchBitmap =
		" vec4 bitmapColor = texture2D(bitmapSampler, outBitmapTexCoords);\n";

tests/HwAccelerationTest/AndroidManifest.xml

+9 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,15 @@

		<meta-data android:name="android.graphics.renderThread" android:value="true" />

		<activity
		android:name="TextPathActivity"
		android:label="_TextPath">
		<intent-filter>
		<action android:name="android.intent.action.MAIN" />
		<category android:name="android.intent.category.LAUNCHER" />
		</intent-filter>
		</activity>

		<activity
		android:name="GradientStopsActivity"
		android:label="_GradientStops">

tests/HwAccelerationTest/src/com/android/test/hwui/TextPathActivity.java

0 → 100644

+77 −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.android.test.hwui;

		import android.app.Activity;
		import android.content.Context;
		import android.graphics.Canvas;
		import android.graphics.Paint;
		import android.graphics.Path;
		import android.os.Bundle;
		import android.view.View;
		import android.widget.ScrollView;

		@SuppressWarnings({"UnusedDeclaration"})
		public class TextPathActivity extends Activity {
		@Override
		protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);

		ScrollView scroller = new ScrollView(this);
		scroller.addView(new CustomTextView(this));
		setContentView(scroller);
		}

		static class CustomTextView extends View {
		private final Paint mHugePaint;

		CustomTextView(Context c) {
		super(c);

		mHugePaint = new Paint();
		mHugePaint.setAntiAlias(true);
		mHugePaint.setColor(0xff000000);
		mHugePaint.setTextSize(300f);
		}

		@Override
		protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
		setMeasuredDimension(MeasureSpec.getSize(widthMeasureSpec), 3000);
		}

		@Override
		protected void onDraw(Canvas canvas) {
		super.onDraw(canvas);
		canvas.drawRGB(255, 255, 255);

		Path path = new Path();

		canvas.translate(100.0f, 300.0f);
		drawTextAsPath(canvas, "Hello", path);

		canvas.translate(0.0f, 400.0f);
		drawTextAsPath(canvas, "OpenGL", path);
		}

		private void drawTextAsPath(Canvas canvas, String text, Path path) {
		int count = text.length();
		mHugePaint.getTextPath(text, 0, count, 0, 0, path);
		path.close();
		canvas.drawPath(path, mHugePaint);
		}
		}
		}