Romain Guy | c0ac193 | 2010-07-19 18:43:02 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright (C) 2010 The Android Open Source Project |
| 3 | * |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | * |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | * |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | #define LOG_TAG "OpenGLRenderer" |
| 18 | |
| 19 | #include <GLES2/gl2.h> |
| 20 | |
| 21 | #include <SkCanvas.h> |
| 22 | #include <SkGradientShader.h> |
| 23 | |
| 24 | #include "GradientCache.h" |
| 25 | |
| 26 | namespace android { |
| 27 | namespace uirenderer { |
| 28 | |
| 29 | /////////////////////////////////////////////////////////////////////////////// |
| 30 | // Constructors/destructor |
| 31 | /////////////////////////////////////////////////////////////////////////////// |
| 32 | |
| 33 | GradientCache::GradientCache(uint32_t maxByteSize): |
| 34 | mCache(GenerationCache<SkShader*, Texture*>::kUnlimitedCapacity), |
| 35 | mSize(0), mMaxSize(maxByteSize) { |
| 36 | mCache.setOnEntryRemovedListener(this); |
| 37 | } |
| 38 | |
| 39 | GradientCache::~GradientCache() { |
| 40 | mCache.clear(); |
| 41 | } |
| 42 | |
| 43 | /////////////////////////////////////////////////////////////////////////////// |
| 44 | // Size management |
| 45 | /////////////////////////////////////////////////////////////////////////////// |
| 46 | |
| 47 | uint32_t GradientCache::getSize() { |
| 48 | return mSize; |
| 49 | } |
| 50 | |
| 51 | uint32_t GradientCache::getMaxSize() { |
| 52 | return mMaxSize; |
| 53 | } |
| 54 | |
| 55 | void GradientCache::setMaxSize(uint32_t maxSize) { |
| 56 | mMaxSize = maxSize; |
| 57 | while (mSize > mMaxSize) { |
| 58 | mCache.removeOldest(); |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | /////////////////////////////////////////////////////////////////////////////// |
| 63 | // Callbacks |
| 64 | /////////////////////////////////////////////////////////////////////////////// |
| 65 | |
| 66 | void GradientCache::operator()(SkShader*& shader, Texture*& texture) { |
| 67 | if (shader) { |
| 68 | const uint32_t size = texture->width * texture->height * 4; |
| 69 | mSize -= size; |
| 70 | } |
| 71 | |
| 72 | if (texture) { |
| 73 | glDeleteTextures(1, &texture->id); |
| 74 | delete texture; |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | /////////////////////////////////////////////////////////////////////////////// |
| 79 | // Caching |
| 80 | /////////////////////////////////////////////////////////////////////////////// |
| 81 | |
| 82 | Texture* GradientCache::get(SkShader* shader) { |
| 83 | Texture* texture = mCache.get(shader); |
| 84 | return texture; |
| 85 | } |
| 86 | |
| 87 | void GradientCache::remove(SkShader* shader) { |
| 88 | mCache.remove(shader); |
| 89 | } |
| 90 | |
| 91 | void GradientCache::clear() { |
| 92 | mCache.clear(); |
| 93 | } |
| 94 | |
| 95 | Texture* GradientCache::addLinearGradient(SkShader* shader, float* bounds, uint32_t* colors, |
| 96 | float* positions, int count, SkShader::TileMode tileMode) { |
| 97 | SkBitmap bitmap; |
| 98 | bitmap.setConfig(SkBitmap::kARGB_8888_Config, 1024, 1); |
| 99 | bitmap.allocPixels(); |
| 100 | bitmap.eraseColor(0); |
| 101 | |
| 102 | SkCanvas canvas(bitmap); |
| 103 | |
| 104 | SkPoint points[2]; |
| 105 | points[0].set(0.0f, 0.0f); |
| 106 | points[1].set(bitmap.width(), 0.0f); |
| 107 | |
| 108 | SkShader* localShader = SkGradientShader::CreateLinear(points, |
| 109 | reinterpret_cast<const SkColor*>(colors), positions, count, tileMode); |
| 110 | |
| 111 | SkPaint p; |
| 112 | p.setStyle(SkPaint::kStrokeAndFill_Style); |
| 113 | p.setShader(localShader)->unref(); |
| 114 | |
| 115 | canvas.drawRectCoords(0.0f, 0.0f, bitmap.width(), 1.0f, p); |
| 116 | |
| 117 | // Asume the cache is always big enough |
| 118 | const uint32_t size = bitmap.rowBytes() * bitmap.height(); |
| 119 | while (mSize + size > mMaxSize) { |
| 120 | mCache.removeOldest(); |
| 121 | } |
| 122 | |
| 123 | Texture* texture = new Texture; |
| 124 | generateTexture(&bitmap, texture); |
| 125 | |
| 126 | mSize += size; |
| 127 | mCache.put(shader, texture); |
| 128 | |
| 129 | return texture; |
| 130 | } |
| 131 | |
| 132 | void GradientCache::generateTexture(SkBitmap* bitmap, Texture* texture) { |
| 133 | SkAutoLockPixels autoLock(*bitmap); |
| 134 | if (!bitmap->readyToDraw()) { |
| 135 | LOGE("Cannot generate texture from shader"); |
| 136 | return; |
| 137 | } |
| 138 | |
| 139 | texture->generation = bitmap->getGenerationID(); |
| 140 | texture->width = bitmap->width(); |
| 141 | texture->height = bitmap->height(); |
| 142 | |
| 143 | glGenTextures(1, &texture->id); |
| 144 | |
| 145 | glBindTexture(GL_TEXTURE_2D, texture->id); |
| 146 | glPixelStorei(GL_UNPACK_ALIGNMENT, bitmap->bytesPerPixel()); |
| 147 | |
| 148 | texture->blend = !bitmap->isOpaque(); |
| 149 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, bitmap->rowBytesAsPixels(), texture->height, 0, |
| 150 | GL_RGBA, GL_UNSIGNED_BYTE, bitmap->getPixels()); |
| 151 | |
| 152 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
| 153 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
| 154 | |
| 155 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); |
| 156 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); |
| 157 | } |
| 158 | |
| 159 | }; // namespace uirenderer |
| 160 | }; // namespace android |