GradientCache.cpp revision 9372ac3621848085e77b867f220c0b5ffce4010d
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 17059e12ccd20f5c249724a8362d6bac325334ea76Romain Guy#include <utils/JenkinsHash.h> 18a2341a9f6addcd79723965ec5b1a1c5ae0f8bd65Romain Guy 19320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy#include "Caches.h" 20c9855a53edfac818dc68714557185977556f849dRomain Guy#include "Debug.h" 21c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy#include "GradientCache.h" 22fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy#include "Properties.h" 23c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 246b50780363d3bb8db600c770183fa07677509ae8John Reck#include <cutils/properties.h> 256b50780363d3bb8db600c770183fa07677509ae8John Reck 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 65117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris CraikGradientCache::GradientCache(Extensions& extensions) 66117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik : mCache(LruCache<GradientCacheEntry, Texture*>::kUnlimitedCapacity) 67117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik , mSize(0) 68117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik , mMaxSize(MB(DEFAULT_GRADIENT_CACHE_SIZE)) 69117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik , mUseFloatTexture(extensions.hasFloatTextures()) 70117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik , mHasNpot(extensions.hasNPot()){ 71fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy char property[PROPERTY_VALUE_MAX]; 72d41c4d8c732095ae99c955b6b82f7306633004b1Chris Craik if (property_get(PROPERTY_GRADIENT_CACHE_SIZE, property, nullptr) > 0) { 73c9855a53edfac818dc68714557185977556f849dRomain Guy INIT_LOGD(" Setting gradient cache size to %sMB", property); 74fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy setMaxSize(MB(atof(property))); 75fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy } else { 76c9855a53edfac818dc68714557185977556f849dRomain Guy INIT_LOGD(" Using default gradient cache size of %.2fMB", DEFAULT_GRADIENT_CACHE_SIZE); 77fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy } 78fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy 79a8557d2169e14997637f57bc897640c8882d4a46Mathias Agopian glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize); 808dcfd5e836341b4a803b04d104a930bb312182d3Romain Guy 81fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy mCache.setOnEntryRemovedListener(this); 82c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 83c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 84c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain GuyGradientCache::~GradientCache() { 85c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.clear(); 86c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 87c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 88c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 89c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Size management 90c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 91c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 92c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyuint32_t GradientCache::getSize() { 93c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return mSize; 94c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 95c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 96c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyuint32_t GradientCache::getMaxSize() { 97c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return mMaxSize; 98c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 99c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 100c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyvoid GradientCache::setMaxSize(uint32_t maxSize) { 101c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mMaxSize = maxSize; 102c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy while (mSize > mMaxSize) { 103c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.removeOldest(); 104c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 105c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 106c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 107c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 108c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Callbacks 109c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 110c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 111e63f7c622a2086aefa80983c6f41b74fb166bb42Chris Craikvoid GradientCache::operator()(GradientCacheEntry&, Texture*& texture) { 1126203f6c8147069976342be8f42add797a50f9557Romain Guy if (texture) { 11338e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck mSize -= texture->objectSize(); 114be1b127c7bec252e0c6ab0e06ed6babed07d496fRomain Guy texture->deleteTexture(); 115c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy delete texture; 116c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 117c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 118c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 119c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 120c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Caching 121c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 122c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 12342e1e0d482d774cf18a55773e434f02edb9e4462Romain GuyTexture* GradientCache::get(uint32_t* colors, float* positions, int count) { 12442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientCacheEntry gradient(colors, positions, count); 1256203f6c8147069976342be8f42add797a50f9557Romain Guy Texture* texture = mCache.get(gradient); 126c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 1276203f6c8147069976342be8f42add797a50f9557Romain Guy if (!texture) { 12842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture = addLinearGradient(gradient, colors, positions, count); 129fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy } 1306203f6c8147069976342be8f42add797a50f9557Romain Guy 1316203f6c8147069976342be8f42add797a50f9557Romain Guy return texture; 132fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy} 133fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy 134fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guyvoid GradientCache::clear() { 135c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.clear(); 136c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 137c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 13842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guyvoid GradientCache::getGradientInfo(const uint32_t* colors, const int count, 13942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientInfo& info) { 140320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy uint32_t width = 256 * (count - 1); 141320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy 14295aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // If the npot extension is not supported we cannot use non-clamp 14395aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // wrap modes. We therefore find the nearest largest power of 2 14495aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // unless width is already a power of 2 14595aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy if (!mHasNpot && (width & (width - 1)) != 0) { 14695aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy width = 1 << (32 - __builtin_clz(width)); 147320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy } 148c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 149320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy bool hasAlpha = false; 15042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy for (int i = 0; i < count; i++) { 15142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy if (((colors[i] >> 24) & 0xff) < 255) { 15242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy hasAlpha = true; 15342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy break; 15442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 15542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 156c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 15742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy info.width = min(width, uint32_t(mMaxTextureSize)); 15842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy info.hasAlpha = hasAlpha; 15942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy} 160c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 16142e1e0d482d774cf18a55773e434f02edb9e4462Romain GuyTexture* GradientCache::addLinearGradient(GradientCacheEntry& gradient, 16242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy uint32_t* colors, float* positions, int count) { 163c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 16442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientInfo info; 16542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy getGradientInfo(colors, count, info); 166c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 1678e93a7c9377b4ae43ecfb408f4906a09f6c83c03Chris Craik Texture* texture = new Texture(Caches::getInstance()); 16842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture->blend = info.hasAlpha; 16942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture->generation = 1; 170c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 171c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy // Asume the cache is always big enough 17238e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck const uint32_t size = info.width * 2 * bytesPerPixel(); 17315a65bfee5b0a98664eb5ebadad63c73e2c471f8Romain Guy while (getSize() + size > mMaxSize) { 174c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.removeOldest(); 175c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 176c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 17738e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck generateTexture(colors, positions, info.width, 2, texture); 178c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 179c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mSize += size; 1806203f6c8147069976342be8f42add797a50f9557Romain Guy mCache.put(gradient, texture); 181c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 182c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return texture; 183c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 184c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 185b48800428906ae455c2b63acacd44e390e1fee49Romain Guysize_t GradientCache::bytesPerPixel() const { 186b48800428906ae455c2b63acacd44e390e1fee49Romain Guy // We use 4 channels (RGBA) 187b48800428906ae455c2b63acacd44e390e1fee49Romain Guy return 4 * (mUseFloatTexture ? sizeof(float) : sizeof(uint8_t)); 188b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 189b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 190b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::splitToBytes(uint32_t inColor, GradientColor& outColor) const { 191b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.r = (inColor >> 16) & 0xff; 192b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.g = (inColor >> 8) & 0xff; 193b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.b = (inColor >> 0) & 0xff; 194b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.a = (inColor >> 24) & 0xff; 195b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 196b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 197b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::splitToFloats(uint32_t inColor, GradientColor& outColor) const { 198b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.r = ((inColor >> 16) & 0xff) / 255.0f; 199b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.g = ((inColor >> 8) & 0xff) / 255.0f; 200b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.b = ((inColor >> 0) & 0xff) / 255.0f; 201b48800428906ae455c2b63acacd44e390e1fee49Romain Guy outColor.a = ((inColor >> 24) & 0xff) / 255.0f; 202b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 203b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 204b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::mixBytes(GradientColor& start, GradientColor& end, float amount, 205b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t*& dst) const { 206b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float oppAmount = 1.0f - amount; 207b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const float alpha = start.a * oppAmount + end.a * amount; 208b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const float a = alpha / 255.0f; 209b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 210b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(a * (start.r * oppAmount + end.r * amount)); 211b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(a * (start.g * oppAmount + end.g * amount)); 212b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(a * (start.b * oppAmount + end.b * amount)); 213b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *dst++ = uint8_t(alpha); 214b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 215b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 216b48800428906ae455c2b63acacd44e390e1fee49Romain Guyvoid GradientCache::mixFloats(GradientColor& start, GradientColor& end, float amount, 217b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t*& dst) const { 218b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float oppAmount = 1.0f - amount; 219b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const float a = start.a * oppAmount + end.a * amount; 220b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 221b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float* d = (float*) dst; 222b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a * (start.r * oppAmount + end.r * amount); 223b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a * (start.g * oppAmount + end.g * amount); 224b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a * (start.b * oppAmount + end.b * amount); 225b48800428906ae455c2b63acacd44e390e1fee49Romain Guy *d++ = a; 226b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 227b48800428906ae455c2b63acacd44e390e1fee49Romain Guy dst += 4 * sizeof(float); 228b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 229b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 23038e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reckvoid GradientCache::generateTexture(uint32_t* colors, float* positions, 23138e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck const uint32_t width, const uint32_t height, Texture* texture) { 232b48800428906ae455c2b63acacd44e390e1fee49Romain Guy const GLsizei rowBytes = width * bytesPerPixel(); 23338e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck uint8_t pixels[rowBytes * height]; 23442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 235b48800428906ae455c2b63acacd44e390e1fee49Romain Guy static ChannelSplitter gSplitters[] = { 236b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::splitToBytes, 237b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::splitToFloats, 238b48800428906ae455c2b63acacd44e390e1fee49Romain Guy }; 239b48800428906ae455c2b63acacd44e390e1fee49Romain Guy ChannelSplitter split = gSplitters[mUseFloatTexture]; 24042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 241b48800428906ae455c2b63acacd44e390e1fee49Romain Guy static ChannelMixer gMixers[] = { 242b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::mixBytes, 243b48800428906ae455c2b63acacd44e390e1fee49Romain Guy &android::uirenderer::GradientCache::mixFloats, 244b48800428906ae455c2b63acacd44e390e1fee49Romain Guy }; 245b48800428906ae455c2b63acacd44e390e1fee49Romain Guy ChannelMixer mix = gMixers[mUseFloatTexture]; 24642e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 247b48800428906ae455c2b63acacd44e390e1fee49Romain Guy GradientColor start; 248b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*split)(colors[0], start); 24942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 250b48800428906ae455c2b63acacd44e390e1fee49Romain Guy GradientColor end; 251b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*split)(colors[1], end); 25242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 253b48800428906ae455c2b63acacd44e390e1fee49Romain Guy int currentPos = 1; 254b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float startPos = positions[0]; 255b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float distance = positions[1] - startPos; 256b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 257b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t* dst = pixels; 25842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy for (uint32_t x = 0; x < width; x++) { 25942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy float pos = x / float(width - 1); 26042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy if (pos > positions[currentPos]) { 261b48800428906ae455c2b63acacd44e390e1fee49Romain Guy start = end; 262b48800428906ae455c2b63acacd44e390e1fee49Romain Guy startPos = positions[currentPos]; 26342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 26442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy currentPos++; 26542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 266b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*split)(colors[currentPos], end); 267b48800428906ae455c2b63acacd44e390e1fee49Romain Guy distance = positions[currentPos] - startPos; 26842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 26942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 270b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float amount = (pos - startPos) / distance; 271b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*mix)(start, end, amount, dst); 272c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 273c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 274b48800428906ae455c2b63acacd44e390e1fee49Romain Guy memcpy(pixels + rowBytes, pixels, rowBytes); 275c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 276b48800428906ae455c2b63acacd44e390e1fee49Romain Guy glPixelStorei(GL_UNPACK_ALIGNMENT, 4); 277c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 278b48800428906ae455c2b63acacd44e390e1fee49Romain Guy if (mUseFloatTexture) { 279b48800428906ae455c2b63acacd44e390e1fee49Romain Guy // We have to use GL_RGBA16F because GL_RGBA32F does not support filtering 2809372ac3621848085e77b867f220c0b5ffce4010dJohn Reck texture->upload(GL_RGBA16F, width, height, GL_RGBA, GL_FLOAT, pixels); 281b48800428906ae455c2b63acacd44e390e1fee49Romain Guy } else { 2829372ac3621848085e77b867f220c0b5ffce4010dJohn Reck texture->upload(GL_RGBA, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels); 283b48800428906ae455c2b63acacd44e390e1fee49Romain Guy } 284c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 28539d252a6632d057d5077f7eaf1b8ed7a142f3397Romain Guy texture->setFilter(GL_LINEAR); 28639d252a6632d057d5077f7eaf1b8ed7a142f3397Romain Guy texture->setWrap(GL_CLAMP_TO_EDGE); 287c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 288c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 289c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy}; // namespace uirenderer 290c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy}; // namespace android 291