GradientCache.cpp revision 51d6a3db97bdd5315f1a17a4b447d10a92217b98
1c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/* 2c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * Copyright (C) 2010 The Android Open Source Project 3c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * 4c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * Licensed under the Apache License, Version 2.0 (the "License"); 5c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * you may not use this file except in compliance with the License. 6c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * You may obtain a copy of the License at 7c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * 8c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * http://www.apache.org/licenses/LICENSE-2.0 9c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * 10c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * Unless required by applicable law or agreed to in writing, software 11c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * distributed under the License is distributed on an "AS IS" BASIS, 12c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * See the License for the specific language governing permissions and 14c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy * limitations under the License. 15c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy */ 16c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 17c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy#define LOG_TAG "OpenGLRenderer" 18c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 19059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy#include <utils/JenkinsHash.h> 20a2341a9f6addcd79723965ec5b1a1c5ae0f8bd65Romain Guy 21320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy#include "Caches.h" 22c9855a53edfac818dc68714557185977556f849dRomain Guy#include "Debug.h" 23c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy#include "GradientCache.h" 24fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy#include "Properties.h" 25c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 26c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guynamespace android { 27c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guynamespace uirenderer { 28c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 29c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 3042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy// Functions 3142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy/////////////////////////////////////////////////////////////////////////////// 3242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 3342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guytemplate<typename T> 3442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guystatic inline T min(T a, T b) { 3542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy return a < b ? a : b; 3642e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy} 3742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 3842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy/////////////////////////////////////////////////////////////////////////////// 39059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy// Cache entry 40059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy/////////////////////////////////////////////////////////////////////////////// 41059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy 42059e12ccd20f5c249724a8362d6bac325334ea76Romain Guyhash_t GradientCacheEntry::hash() const { 43059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy uint32_t hash = JenkinsHashMix(0, count); 44059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy for (uint32_t i = 0; i < count; i++) { 45059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy hash = JenkinsHashMix(hash, android::hash_type(colors[i])); 46059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy hash = JenkinsHashMix(hash, android::hash_type(positions[i])); 47059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy } 48059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy return JenkinsHashWhiten(hash); 49059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy} 50059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy 51059e12ccd20f5c249724a8362d6bac325334ea76Romain Guyint GradientCacheEntry::compare(const GradientCacheEntry& lhs, const GradientCacheEntry& rhs) { 52059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy int deltaInt = int(lhs.count) - int(rhs.count); 53059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy if (deltaInt != 0) return deltaInt; 54059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy 5551d6a3db97bdd5315f1a17a4b447d10a92217b98Chris Craik deltaInt = memcmp(lhs.colors.get(), rhs.colors.get(), lhs.count * sizeof(uint32_t)); 56059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy if (deltaInt != 0) return deltaInt; 57059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy 5851d6a3db97bdd5315f1a17a4b447d10a92217b98Chris Craik return memcmp(lhs.positions.get(), rhs.positions.get(), lhs.count * sizeof(float)); 59059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy} 60059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy 61059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy/////////////////////////////////////////////////////////////////////////////// 62c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Constructors/destructor 63c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 64c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 65fb8b763f762ae21923c58d64caa729b012f40e05Romain GuyGradientCache::GradientCache(): 66059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy mCache(LruCache<GradientCacheEntry, Texture*>::kUnlimitedCapacity), 67fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy mSize(0), mMaxSize(MB(DEFAULT_GRADIENT_CACHE_SIZE)) { 68fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy char property[PROPERTY_VALUE_MAX]; 69fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy if (property_get(PROPERTY_GRADIENT_CACHE_SIZE, property, NULL) > 0) { 70c9855a53edfac818dc68714557185977556f849dRomain Guy INIT_LOGD(" Setting gradient cache size to %sMB", property); 71fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy setMaxSize(MB(atof(property))); 72fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy } else { 73c9855a53edfac818dc68714557185977556f849dRomain Guy INIT_LOGD(" Using default gradient cache size of %.2fMB", DEFAULT_GRADIENT_CACHE_SIZE); 74fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy } 75fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy 76a8557d2169e14997637f57bc897640c8882d4a46Mathias Agopian glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize); 778dcfd5e836341b4a803b04d104a930bb312182d3Romain Guy 78fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy mCache.setOnEntryRemovedListener(this); 79b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 80b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const Extensions& extensions = Extensions::getInstance(); 817f4307668b10467ee39d41c7ea29cf1ff238a835Romain Guy mUseFloatTexture = extensions.hasFloatTextures(); 82b48800428906ae455c2b63acacd44e390e1fee49Romain Guy mHasNpot = extensions.hasNPot(); 83fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy} 84fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy 85c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain GuyGradientCache::GradientCache(uint32_t maxByteSize): 86059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy mCache(LruCache<GradientCacheEntry, Texture*>::kUnlimitedCapacity), 87c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mSize(0), mMaxSize(maxByteSize) { 88c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.setOnEntryRemovedListener(this); 89c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 90c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 91c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain GuyGradientCache::~GradientCache() { 92c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.clear(); 93c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 94c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 95c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 96c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Size management 97c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 98c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 99c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyuint32_t GradientCache::getSize() { 100c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return mSize; 101c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 102c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 103c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyuint32_t GradientCache::getMaxSize() { 104c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return mMaxSize; 105c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 106c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 107c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyvoid GradientCache::setMaxSize(uint32_t maxSize) { 108c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mMaxSize = maxSize; 109c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy while (mSize > mMaxSize) { 110c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.removeOldest(); 111c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 112c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 113c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 114c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 115c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Callbacks 116c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 117c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 118e63f7c622a2086aefa80983c6f41b74fb166bb42Chris Craikvoid GradientCache::operator()(GradientCacheEntry&, Texture*& texture) { 1196203f6c8147069976342be8f42add797a50f9557Romain Guy if (texture) { 120b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const uint32_t size = texture->width * texture->height * bytesPerPixel(); 121c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mSize -= size; 122c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 123be1b127c7bec252e0c6ab0e06ed6babed07d496fRomain Guy texture->deleteTexture(); 124c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy delete texture; 125c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 126c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 127c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 128c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 129c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Caching 130c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 131c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 13242e1e0d482d774cf18a55773e434f02edb9e4462Romain GuyTexture* GradientCache::get(uint32_t* colors, float* positions, int count) { 13342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientCacheEntry gradient(colors, positions, count); 1346203f6c8147069976342be8f42add797a50f9557Romain Guy Texture* texture = mCache.get(gradient); 135c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 1366203f6c8147069976342be8f42add797a50f9557Romain Guy if (!texture) { 13742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture = addLinearGradient(gradient, colors, positions, count); 138fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy } 1396203f6c8147069976342be8f42add797a50f9557Romain Guy 1406203f6c8147069976342be8f42add797a50f9557Romain Guy return texture; 141fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy} 142fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy 143fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guyvoid GradientCache::clear() { 144c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.clear(); 145c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 146c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 14742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guyvoid GradientCache::getGradientInfo(const uint32_t* colors, const int count, 14842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientInfo& info) { 149320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy uint32_t width = 256 * (count - 1); 150320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy 15195aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // If the npot extension is not supported we cannot use non-clamp 15295aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // wrap modes. We therefore find the nearest largest power of 2 15395aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // unless width is already a power of 2 15495aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy if (!mHasNpot && (width & (width - 1)) != 0) { 15595aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy width = 1 << (32 - __builtin_clz(width)); 156320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy } 157c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 158320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy bool hasAlpha = false; 15942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy for (int i = 0; i < count; i++) { 16042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy if (((colors[i] >> 24) & 0xff) < 255) { 16142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy hasAlpha = true; 16242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy break; 16342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 16442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 165c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 16642e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy info.width = min(width, uint32_t(mMaxTextureSize)); 16742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy info.hasAlpha = hasAlpha; 16842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy} 169c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 17042e1e0d482d774cf18a55773e434f02edb9e4462Romain GuyTexture* GradientCache::addLinearGradient(GradientCacheEntry& gradient, 17142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy uint32_t* colors, float* positions, int count) { 172c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 17342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientInfo info; 17442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy getGradientInfo(colors, count, info); 175c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 1768aa195d7081b889f3a7b1f426cbd8556377aae5eRomain Guy Texture* texture = new Texture(); 17742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture->width = info.width; 178b48800428906ae455c2b63acacd44e390e1fee49Romain Guy texture->height = 2; 17942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture->blend = info.hasAlpha; 18042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture->generation = 1; 181c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 182c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy // Asume the cache is always big enough 183b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const uint32_t size = texture->width * texture->height * bytesPerPixel(); 18415a65bfee5b0a98664eb5ebadad63c73e2c471f8Romain Guy while (getSize() + size > mMaxSize) { 185c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.removeOldest(); 186c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 187c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 188e63f7c622a2086aefa80983c6f41b74fb166bb42Chris Craik generateTexture(colors, positions, texture); 189c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 190c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mSize += size; 1916203f6c8147069976342be8f42add797a50f9557Romain Guy mCache.put(gradient, texture); 192c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 193c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return texture; 194c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 195c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 196b48800428906ae455c2b63acacd44e390e1fee49Romain Guysize_t GradientCache::bytesPerPixel() const { 197b48800428906ae455c2b63acacd44e390e1fee49Romain Guy // We use 4 channels (RGBA) 198b48800428906ae455c2b63acacd44e390e1fee49Romain Guy return 4 * (mUseFloatTexture ? sizeof(float) : sizeof(uint8_t)); 199b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 200b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 201b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::splitToBytes(uint32_t inColor, GradientColor& outColor) const { 202b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.r = (inColor >> 16) & 0xff; 203b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.g = (inColor >> 8) & 0xff; 204b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.b = (inColor >> 0) & 0xff; 205b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.a = (inColor >> 24) & 0xff; 206b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 207b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 208b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::splitToFloats(uint32_t inColor, GradientColor& outColor) const { 209b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.r = ((inColor >> 16) & 0xff) / 255.0f; 210b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.g = ((inColor >> 8) & 0xff) / 255.0f; 211b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.b = ((inColor >> 0) & 0xff) / 255.0f; 212b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.a = ((inColor >> 24) & 0xff) / 255.0f; 213b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 214b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 215b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::mixBytes(GradientColor& start, GradientColor& end, float amount, 216b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t*& dst) const { 217b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float oppAmount = 1.0f - amount; 218b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const float alpha = start.a * oppAmount + end.a * amount; 219b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const float a = alpha / 255.0f; 220b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 221b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(a * (start.r * oppAmount + end.r * amount)); 222b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(a * (start.g * oppAmount + end.g * amount)); 223b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(a * (start.b * oppAmount + end.b * amount)); 224b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(alpha); 225b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 226b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 227b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::mixFloats(GradientColor& start, GradientColor& end, float amount, 228b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t*& dst) const { 229b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float oppAmount = 1.0f - amount; 230b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const float a = start.a * oppAmount + end.a * amount; 231b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 232b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float* d = (float*) dst; 233b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a * (start.r * oppAmount + end.r * amount); 234b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a * (start.g * oppAmount + end.g * amount); 235b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a * (start.b * oppAmount + end.b * amount); 236b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a; 237b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 238b48800428906ae455c2b63acacd44e390e1fee49Romain Guy dst += 4 * sizeof(float); 239b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 240b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 241e63f7c622a2086aefa80983c6f41b74fb166bb42Chris Craikvoid GradientCache::generateTexture(uint32_t* colors, float* positions, Texture* texture) { 24242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy const uint32_t width = texture->width; 243b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const GLsizei rowBytes = width * bytesPerPixel(); 244b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t pixels[rowBytes * texture->height]; 24542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 246b48800428906ae455c2b63acacd44e390e1fee49Romain Guy static ChannelSplitter gSplitters[] = { 247b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::splitToBytes, 248b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::splitToFloats, 249b48800428906ae455c2b63acacd44e390e1fee49Romain Guy }; 250b48800428906ae455c2b63acacd44e390e1fee49Romain Guy ChannelSplitter split = gSplitters[mUseFloatTexture]; 25142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 252b48800428906ae455c2b63acacd44e390e1fee49Romain Guy static ChannelMixer gMixers[] = { 253b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::mixBytes, 254b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::mixFloats, 255b48800428906ae455c2b63acacd44e390e1fee49Romain Guy }; 256b48800428906ae455c2b63acacd44e390e1fee49Romain Guy ChannelMixer mix = gMixers[mUseFloatTexture]; 25742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 258b48800428906ae455c2b63acacd44e390e1fee49Romain Guy GradientColor start; 259b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*split)(colors[0], start); 26042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 261b48800428906ae455c2b63acacd44e390e1fee49Romain Guy GradientColor end; 262b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*split)(colors[1], end); 26342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 264b48800428906ae455c2b63acacd44e390e1fee49Romain Guy int currentPos = 1; 265b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float startPos = positions[0]; 266b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float distance = positions[1] - startPos; 267b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 268b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t* dst = pixels; 26942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy for (uint32_t x = 0; x < width; x++) { 27042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy float pos = x / float(width - 1); 27142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy if (pos > positions[currentPos]) { 272b48800428906ae455c2b63acacd44e390e1fee49Romain Guy start = end; 273b48800428906ae455c2b63acacd44e390e1fee49Romain Guy startPos = positions[currentPos]; 27442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 27542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy currentPos++; 27642e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 277b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*split)(colors[currentPos], end); 278b48800428906ae455c2b63acacd44e390e1fee49Romain Guy distance = positions[currentPos] - startPos; 27942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 28042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 281b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float amount = (pos - startPos) / distance; 282b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*mix)(start, end, amount, dst); 283c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 284c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 285b48800428906ae455c2b63acacd44e390e1fee49Romain Guy memcpy(pixels + rowBytes, pixels, rowBytes); 286c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 287c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy glGenTextures(1, &texture->id); 2888aa195d7081b889f3a7b1f426cbd8556377aae5eRomain Guy Caches::getInstance().bindTexture(texture->id); 289b48800428906ae455c2b63acacd44e390e1fee49Romain Guy glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 290c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 291b48800428906ae455c2b63acacd44e390e1fee49Romain Guy if (mUseFloatTexture) { 292b48800428906ae455c2b63acacd44e390e1fee49Romain Guy // We have to use GL_RGBA16F because GL_RGBA32F does not support filtering 293b48800428906ae455c2b63acacd44e390e1fee49Romain Guy glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F, width, texture->height, 0, 294b48800428906ae455c2b63acacd44e390e1fee49Romain Guy GL_RGBA, GL_FLOAT, pixels); 295b48800428906ae455c2b63acacd44e390e1fee49Romain Guy } else { 296b48800428906ae455c2b63acacd44e390e1fee49Romain Guy glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, texture->height, 0, 297b48800428906ae455c2b63acacd44e390e1fee49Romain Guy GL_RGBA, GL_UNSIGNED_BYTE, pixels); 298b48800428906ae455c2b63acacd44e390e1fee49Romain Guy } 299c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 30039d252a6632d057d5077f7eaf1b8ed7a142f3397Romain Guy texture->setFilter(GL_LINEAR); 30139d252a6632d057d5077f7eaf1b8ed7a142f3397Romain Guy texture->setWrap(GL_CLAMP_TO_EDGE); 302c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 303c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 304c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy}; // namespace uirenderer 305c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy}; // namespace android 306