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) 6848a8f431fa52ae2ee25ffba9d20676f03bb710ffChris Craik , mMaxSize(Properties::gradientCacheSize) 69117bdbcfa3e8306dad21e7e01fa71b00cdfa7265Chris Craik , mUseFloatTexture(extensions.hasFloatTextures()) 70253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy , mHasNpot(extensions.hasNPot()) 71efb4b06493fe7b1604c762a448b13c7af2845a8dRomain Guy , mHasLinearBlending(extensions.hasLinearBlending()) { 72a8557d2169e14997637f57bc897640c8882d4a46Mathias Agopian glGetIntegerv(GL_MAX_TEXTURE_SIZE, &mMaxTextureSize); 738dcfd5e836341b4a803b04d104a930bb312182d3Romain Guy 74fb8b763f762ae21923c58d64caa729b012f40e05Romain Guy mCache.setOnEntryRemovedListener(this); 75c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 76c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 77c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain GuyGradientCache::~GradientCache() { 78c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.clear(); 79c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 80c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 81c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 82c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Size management 83c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 84c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 85c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyuint32_t GradientCache::getSize() { 86c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return mSize; 87c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 88c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 89c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guyuint32_t GradientCache::getMaxSize() { 90c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return mMaxSize; 91c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 92c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 93c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 94c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Callbacks 95c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 96c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 97e63f7c622a2086aefa80983c6f41b74fb166bb42Chris Craikvoid GradientCache::operator()(GradientCacheEntry&, Texture*& texture) { 986203f6c8147069976342be8f42add797a50f9557Romain Guy if (texture) { 9938e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck mSize -= texture->objectSize(); 100be1b127c7bec252e0c6ab0e06ed6babed07d496fRomain Guy texture->deleteTexture(); 101c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy delete texture; 102c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 103c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 104c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 105c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 106c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy// Caching 107c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy/////////////////////////////////////////////////////////////////////////////// 108c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 10942e1e0d482d774cf18a55773e434f02edb9e4462Romain GuyTexture* GradientCache::get(uint32_t* colors, float* positions, int count) { 11042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientCacheEntry gradient(colors, positions, count); 1116203f6c8147069976342be8f42add797a50f9557Romain Guy Texture* texture = mCache.get(gradient); 112c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 1136203f6c8147069976342be8f42add797a50f9557Romain Guy if (!texture) { 11442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture = addLinearGradient(gradient, colors, positions, count); 115fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy } 1166203f6c8147069976342be8f42add797a50f9557Romain Guy 1176203f6c8147069976342be8f42add797a50f9557Romain Guy return texture; 118fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy} 119fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guy 120fe48f65922d4a3cc4aefe058cee5acec51504a20Romain Guyvoid GradientCache::clear() { 121c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mCache.clear(); 122c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 123c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 12442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guyvoid GradientCache::getGradientInfo(const uint32_t* colors, const int count, 12542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientInfo& info) { 126320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy uint32_t width = 256 * (count - 1); 127320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy 12895aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // If the npot extension is not supported we cannot use non-clamp 12995aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // wrap modes. We therefore find the nearest largest power of 2 13095aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy // unless width is already a power of 2 13195aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy if (!mHasNpot && (width & (width - 1)) != 0) { 13295aeff8f11968c8b29ae114bb5e1172c70cf7634Romain Guy width = 1 << (32 - __builtin_clz(width)); 133320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy } 134c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 135320d46bf844b84351cb80c5d4a4768d86447ac81Romain Guy bool hasAlpha = false; 13642e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy for (int i = 0; i < count; i++) { 13742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy if (((colors[i] >> 24) & 0xff) < 255) { 13842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy hasAlpha = true; 13942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy break; 14042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 14142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 142c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 14342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy info.width = min(width, uint32_t(mMaxTextureSize)); 14442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy info.hasAlpha = hasAlpha; 14542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy} 146c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 14742e1e0d482d774cf18a55773e434f02edb9e4462Romain GuyTexture* GradientCache::addLinearGradient(GradientCacheEntry& gradient, 14842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy uint32_t* colors, float* positions, int count) { 149c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 15042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy GradientInfo info; 15142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy getGradientInfo(colors, count, info); 152c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 1538e93a7c9377b4ae43ecfb408f4906a09f6c83c03Chris Craik Texture* texture = new Texture(Caches::getInstance()); 15442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture->blend = info.hasAlpha; 15542e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy texture->generation = 1; 156c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 15783c9b5bf638d75a3395f57c2c57c31c959632f9dJohn Reck // Assume the cache is always big enough 15838e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck const uint32_t size = info.width * 2 * bytesPerPixel(); 15915a65bfee5b0a98664eb5ebadad63c73e2c471f8Romain Guy while (getSize() + size > mMaxSize) { 16083c9b5bf638d75a3395f57c2c57c31c959632f9dJohn Reck LOG_ALWAYS_FATAL_IF(!mCache.removeOldest(), 16183c9b5bf638d75a3395f57c2c57c31c959632f9dJohn Reck "Ran out of things to remove from the cache? getSize() = %" PRIu32 16283c9b5bf638d75a3395f57c2c57c31c959632f9dJohn Reck ", size = %" PRIu32 ", mMaxSize = %" PRIu32 ", width = %" PRIu32, 16383c9b5bf638d75a3395f57c2c57c31c959632f9dJohn Reck getSize(), size, mMaxSize, info.width); 164c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 165c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 16638e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck generateTexture(colors, positions, info.width, 2, texture); 167c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 168c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy mSize += size; 1691d4e6a0901e5d26f4319ed173b4aa7b907350d93John Reck LOG_ALWAYS_FATAL_IF((int)size != texture->objectSize(), 170d61fd4ede537695d6f7c340aae365095e5bade4dJohn Reck "size != texture->objectSize(), size %" PRIu32 ", objectSize %d" 171d61fd4ede537695d6f7c340aae365095e5bade4dJohn Reck " width = %" PRIu32 " bytesPerPixel() = %zu", 1721d4e6a0901e5d26f4319ed173b4aa7b907350d93John Reck size, texture->objectSize(), info.width, bytesPerPixel()); 1736203f6c8147069976342be8f42add797a50f9557Romain Guy mCache.put(gradient, texture); 174c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 175c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy return texture; 176c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 177c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 178b48800428906ae455c2b63acacd44e390e1fee49Romain Guysize_t GradientCache::bytesPerPixel() const { 179b48800428906ae455c2b63acacd44e390e1fee49Romain Guy // We use 4 channels (RGBA) 180253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy return 4 * (mUseFloatTexture ? /* fp16 */ 2 : sizeof(uint8_t)); 181b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 182b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 183253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guysize_t GradientCache::sourceBytesPerPixel() const { 184253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy // We use 4 channels (RGBA) and upload from floats (not half floats) 185253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy return 4 * (mUseFloatTexture ? sizeof(float) : sizeof(uint8_t)); 186b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 187b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 1888762e332e3797fb41929a1c6069207f4906ca329Romain Guyvoid GradientCache::mixBytes(const FloatColor& start, const FloatColor& end, 1898762e332e3797fb41929a1c6069207f4906ca329Romain Guy float amount, uint8_t*& dst) const { 190b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float oppAmount = 1.0f - amount; 191a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy float a = start.a * oppAmount + end.a * amount; 192669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *dst++ = uint8_t(OECF(start.r * oppAmount + end.r * amount) * 255.0f); 193669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *dst++ = uint8_t(OECF(start.g * oppAmount + end.g * amount) * 255.0f); 194669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *dst++ = uint8_t(OECF(start.b * oppAmount + end.b * amount) * 255.0f); 195a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy *dst++ = uint8_t(a * 255.0f); 196b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 197b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 1988762e332e3797fb41929a1c6069207f4906ca329Romain Guyvoid GradientCache::mixFloats(const FloatColor& start, const FloatColor& end, 1998762e332e3797fb41929a1c6069207f4906ca329Romain Guy float amount, uint8_t*& dst) const { 200b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float oppAmount = 1.0f - amount; 201a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy float a = start.a * oppAmount + end.a * amount; 202b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float* d = (float*) dst; 203f9037dabea3ccf80b05ec1d66aeac13bee38b239Romain Guy#ifdef ANDROID_ENABLE_LINEAR_BLENDING 2046183c97e5f317ad52ad16fe50e40129e2c7b2150Romain Guy // We want to stay linear 205669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *d++ = (start.r * oppAmount + end.r * amount); 206669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *d++ = (start.g * oppAmount + end.g * amount); 207669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *d++ = (start.b * oppAmount + end.b * amount); 2088762e332e3797fb41929a1c6069207f4906ca329Romain Guy#else 209669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *d++ = OECF(start.r * oppAmount + end.r * amount); 210669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *d++ = OECF(start.g * oppAmount + end.g * amount); 211669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger *d++ = OECF(start.b * oppAmount + end.b * amount); 2128762e332e3797fb41929a1c6069207f4906ca329Romain Guy#endif 213a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy *d++ = a; 214b48800428906ae455c2b63acacd44e390e1fee49Romain Guy dst += 4 * sizeof(float); 215b48800428906ae455c2b63acacd44e390e1fee49Romain Guy} 216b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 21738e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reckvoid GradientCache::generateTexture(uint32_t* colors, float* positions, 21838e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck const uint32_t width, const uint32_t height, Texture* texture) { 219253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy const GLsizei rowBytes = width * sourceBytesPerPixel(); 22038e0c32852e3b9d8ca4a9d3791577f52536419cbJohn Reck uint8_t pixels[rowBytes * height]; 22142e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 222b48800428906ae455c2b63acacd44e390e1fee49Romain Guy static ChannelMixer gMixers[] = { 223a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy // colors are stored gamma-encoded 224a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy &android::uirenderer::GradientCache::mixBytes, 225a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy // colors are stored in linear (linear blending on) 226a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy // or gamma-encoded (linear blending off) 227a0ed6f03f6f06eb41cbcc15c0a99b4a78fd91befRomain Guy &android::uirenderer::GradientCache::mixFloats, 228b48800428906ae455c2b63acacd44e390e1fee49Romain Guy }; 229b48800428906ae455c2b63acacd44e390e1fee49Romain Guy ChannelMixer mix = gMixers[mUseFloatTexture]; 23042e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 231253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy FloatColor start; 232669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger start.set(colors[0]); 23342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 234253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy FloatColor end; 235669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger end.set(colors[1]); 23642e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 237b48800428906ae455c2b63acacd44e390e1fee49Romain Guy int currentPos = 1; 238b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float startPos = positions[0]; 239b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float distance = positions[1] - startPos; 240b48800428906ae455c2b63acacd44e390e1fee49Romain Guy 241b48800428906ae455c2b63acacd44e390e1fee49Romain Guy uint8_t* dst = pixels; 24242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy for (uint32_t x = 0; x < width; x++) { 24342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy float pos = x / float(width - 1); 24442e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy if (pos > positions[currentPos]) { 245b48800428906ae455c2b63acacd44e390e1fee49Romain Guy start = end; 246b48800428906ae455c2b63acacd44e390e1fee49Romain Guy startPos = positions[currentPos]; 24742e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 24842e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy currentPos++; 24942e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 250669b15a93548b82135c73196665bcb7f03d87795Derek Sollenberger end.set(colors[currentPos]); 251b48800428906ae455c2b63acacd44e390e1fee49Romain Guy distance = positions[currentPos] - startPos; 25242e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy } 25342e1e0d482d774cf18a55773e434f02edb9e4462Romain Guy 254b48800428906ae455c2b63acacd44e390e1fee49Romain Guy float amount = (pos - startPos) / distance; 255b48800428906ae455c2b63acacd44e390e1fee49Romain Guy (this->*mix)(start, end, amount, dst); 256c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy } 257c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 258b48800428906ae455c2b63acacd44e390e1fee49Romain Guy memcpy(pixels + rowBytes, pixels, rowBytes); 259c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 260b48800428906ae455c2b63acacd44e390e1fee49Romain Guy if (mUseFloatTexture) { 2619372ac3621848085e77b867f220c0b5ffce4010dJohn Reck texture->upload(GL_RGBA16F, width, height, GL_RGBA, GL_FLOAT, pixels); 262b48800428906ae455c2b63acacd44e390e1fee49Romain Guy } else { 263efb4b06493fe7b1604c762a448b13c7af2845a8dRomain Guy GLint internalFormat = mHasLinearBlending ? GL_SRGB8_ALPHA8 : GL_RGBA; 264253f2c213f6ecda63b6872aee77bd30d5ec07c82Romain Guy texture->upload(internalFormat, width, height, GL_RGBA, GL_UNSIGNED_BYTE, pixels); 265b48800428906ae455c2b63acacd44e390e1fee49Romain Guy } 266c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 26739d252a6632d057d5077f7eaf1b8ed7a142f3397Romain Guy texture->setFilter(GL_LINEAR); 26839d252a6632d057d5077f7eaf1b8ed7a142f3397Romain Guy texture->setWrap(GL_CLAMP_TO_EDGE); 269c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy} 270c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy 271c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy}; // namespace uirenderer 272c0ac193b9415680f0a69e20a3f5f22d16f8053beRomain Guy}; // namespace android 273