168 lines
5.1 KiB
C++
168 lines
5.1 KiB
C++
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "OpenGLRenderer"
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#include "Debug.h"
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#include "TextDropShadowCache.h"
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#include "Properties.h"
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namespace android {
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namespace uirenderer {
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///////////////////////////////////////////////////////////////////////////////
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// Constructors/destructor
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///////////////////////////////////////////////////////////////////////////////
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TextDropShadowCache::TextDropShadowCache():
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mCache(GenerationCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
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mSize(0), mMaxSize(MB(DEFAULT_DROP_SHADOW_CACHE_SIZE)) {
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char property[PROPERTY_VALUE_MAX];
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if (property_get(PROPERTY_DROP_SHADOW_CACHE_SIZE, property, NULL) > 0) {
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INIT_LOGD(" Setting drop shadow cache size to %sMB", property);
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setMaxSize(MB(atof(property)));
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} else {
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INIT_LOGD(" Using default drop shadow cache size of %.2fMB",
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DEFAULT_DROP_SHADOW_CACHE_SIZE);
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}
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init();
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}
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TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize):
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mCache(GenerationCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
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mSize(0), mMaxSize(maxByteSize) {
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init();
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}
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TextDropShadowCache::~TextDropShadowCache() {
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mCache.clear();
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}
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void TextDropShadowCache::init() {
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mCache.setOnEntryRemovedListener(this);
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mDebugEnabled = readDebugLevel() & kDebugMoreCaches;
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}
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///////////////////////////////////////////////////////////////////////////////
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// Size management
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///////////////////////////////////////////////////////////////////////////////
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uint32_t TextDropShadowCache::getSize() {
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return mSize;
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}
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uint32_t TextDropShadowCache::getMaxSize() {
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return mMaxSize;
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}
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void TextDropShadowCache::setMaxSize(uint32_t maxSize) {
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mMaxSize = maxSize;
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while (mSize > mMaxSize) {
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mCache.removeOldest();
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Callbacks
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///////////////////////////////////////////////////////////////////////////////
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void TextDropShadowCache::operator()(ShadowText& text, ShadowTexture*& texture) {
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if (texture) {
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mSize -= texture->bitmapSize;
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if (mDebugEnabled) {
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LOGD("Shadow texture deleted, size = %d", texture->bitmapSize);
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}
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glDeleteTextures(1, &texture->id);
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delete texture;
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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// Caching
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///////////////////////////////////////////////////////////////////////////////
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void TextDropShadowCache::clear() {
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mCache.clear();
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}
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ShadowTexture* TextDropShadowCache::get(SkPaint* paint, const char* text, uint32_t len,
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int numGlyphs, uint32_t radius) {
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ShadowText entry(paint, radius, len, text);
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ShadowTexture* texture = mCache.get(entry);
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if (!texture) {
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FontRenderer::DropShadow shadow = mRenderer->renderDropShadow(paint, text, 0,
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len, numGlyphs, radius);
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texture = new ShadowTexture;
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texture->left = shadow.penX;
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texture->top = shadow.penY;
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texture->width = shadow.width;
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texture->height = shadow.height;
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texture->generation = 0;
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texture->blend = true;
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const uint32_t size = shadow.width * shadow.height;
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texture->bitmapSize = size;
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// Don't even try to cache a bitmap that's bigger than the cache
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if (size < mMaxSize) {
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while (mSize + size > mMaxSize) {
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mCache.removeOldest();
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}
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}
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glGenTextures(1, &texture->id);
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glBindTexture(GL_TEXTURE_2D, texture->id);
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// Textures are Alpha8
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glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
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glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0,
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GL_ALPHA, GL_UNSIGNED_BYTE, shadow.image);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
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glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
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if (size < mMaxSize) {
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if (mDebugEnabled) {
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LOGD("Shadow texture created, size = %d", texture->bitmapSize);
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}
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entry.copyTextLocally();
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mSize += size;
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mCache.put(entry, texture);
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} else {
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texture->cleanup = true;
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}
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// Cleanup shadow
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delete[] shadow.image;
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}
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return texture;
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}
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}; // namespace uirenderer
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}; // namespace android
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