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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "OpenGLRenderer"
#include <utils/JenkinsHash.h>
#include "Caches.h"
#include "Debug.h"
#include "TextDropShadowCache.h"
#include "Properties.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Cache support
///////////////////////////////////////////////////////////////////////////////
hash_t ShadowText::hash() const {
uint32_t charCount = len / sizeof(char16_t);
uint32_t hash = JenkinsHashMix(0, len);
hash = JenkinsHashMix(hash, android::hash_type(radius));
hash = JenkinsHashMix(hash, android::hash_type(textSize));
hash = JenkinsHashMix(hash, android::hash_type(typeface));
hash = JenkinsHashMix(hash, flags);
hash = JenkinsHashMix(hash, android::hash_type(italicStyle));
hash = JenkinsHashMix(hash, android::hash_type(scaleX));
if (text) {
hash = JenkinsHashMixShorts(hash, text, charCount);
}
if (positions) {
for (uint32_t i = 0; i < charCount * 2; i++) {
hash = JenkinsHashMix(hash, android::hash_type(positions[i]));
}
}
return JenkinsHashWhiten(hash);
}
int ShadowText::compare(const ShadowText& lhs, const ShadowText& rhs) {
int deltaInt = int(lhs.len) - int(rhs.len);
if (deltaInt != 0) return deltaInt;
deltaInt = lhs.flags - rhs.flags;
if (deltaInt != 0) return deltaInt;
if (lhs.radius < rhs.radius) return -1;
if (lhs.radius > rhs.radius) return +1;
if (lhs.typeface < rhs.typeface) return -1;
if (lhs.typeface > rhs.typeface) return +1;
if (lhs.textSize < rhs.textSize) return -1;
if (lhs.textSize > rhs.textSize) return +1;
if (lhs.italicStyle < rhs.italicStyle) return -1;
if (lhs.italicStyle > rhs.italicStyle) return +1;
if (lhs.scaleX < rhs.scaleX) return -1;
if (lhs.scaleX > rhs.scaleX) return +1;
if (lhs.text != rhs.text) {
if (!lhs.text) return -1;
if (!rhs.text) return +1;
deltaInt = memcmp(lhs.text, rhs.text, lhs.len);
if (deltaInt != 0) return deltaInt;
}
if (lhs.positions != rhs.positions) {
if (!lhs.positions) return -1;
if (!rhs.positions) return +1;
return memcmp(lhs.positions, rhs.positions, lhs.len << 2);
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
TextDropShadowCache::TextDropShadowCache():
mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(MB(DEFAULT_DROP_SHADOW_CACHE_SIZE)) {
char property[PROPERTY_VALUE_MAX];
if (property_get(PROPERTY_DROP_SHADOW_CACHE_SIZE, property, NULL) > 0) {
INIT_LOGD(" Setting drop shadow cache size to %sMB", property);
setMaxSize(MB(atof(property)));
} else {
INIT_LOGD(" Using default drop shadow cache size of %.2fMB",
DEFAULT_DROP_SHADOW_CACHE_SIZE);
}
init();
}
TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize):
mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(maxByteSize) {
init();
}
TextDropShadowCache::~TextDropShadowCache() {
mCache.clear();
}
void TextDropShadowCache::init() {
mCache.setOnEntryRemovedListener(this);
mDebugEnabled = readDebugLevel() & kDebugMoreCaches;
}
///////////////////////////////////////////////////////////////////////////////
// Size management
///////////////////////////////////////////////////////////////////////////////
uint32_t TextDropShadowCache::getSize() {
return mSize;
}
uint32_t TextDropShadowCache::getMaxSize() {
return mMaxSize;
}
void TextDropShadowCache::setMaxSize(uint32_t maxSize) {
mMaxSize = maxSize;
while (mSize > mMaxSize) {
mCache.removeOldest();
}
}
///////////////////////////////////////////////////////////////////////////////
// Callbacks
///////////////////////////////////////////////////////////////////////////////
void TextDropShadowCache::operator()(ShadowText& text, ShadowTexture*& texture) {
if (texture) {
mSize -= texture->bitmapSize;
if (mDebugEnabled) {
ALOGD("Shadow texture deleted, size = %d", texture->bitmapSize);
}
texture->deleteTexture();
delete texture;
}
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
void TextDropShadowCache::clear() {
mCache.clear();
}
ShadowTexture* TextDropShadowCache::get(SkPaint* paint, const char* text, uint32_t len,
int numGlyphs, float radius, const float* positions) {
ShadowText entry(paint, radius, len, text, positions);
ShadowTexture* texture = mCache.get(entry);
if (!texture) {
SkPaint paintCopy(*paint);
paintCopy.setTextAlign(SkPaint::kLeft_Align);
FontRenderer::DropShadow shadow = mRenderer->renderDropShadow(&paintCopy, text, 0,
len, numGlyphs, radius, positions);
if (!shadow.image) {
return NULL;
}
Caches& caches = Caches::getInstance();
texture = new ShadowTexture(caches);
texture->left = shadow.penX;
texture->top = shadow.penY;
texture->width = shadow.width;
texture->height = shadow.height;
texture->generation = 0;
texture->blend = true;
const uint32_t size = shadow.width * shadow.height;
texture->bitmapSize = size;
// Don't even try to cache a bitmap that's bigger than the cache
if (size < mMaxSize) {
while (mSize + size > mMaxSize) {
mCache.removeOldest();
}
}
glGenTextures(1, &texture->id);
caches.bindTexture(texture->id);
// Textures are Alpha8
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0,
GL_ALPHA, GL_UNSIGNED_BYTE, shadow.image);
texture->setFilter(GL_LINEAR);
texture->setWrap(GL_CLAMP_TO_EDGE);
if (size < mMaxSize) {
if (mDebugEnabled) {
ALOGD("Shadow texture created, size = %d", texture->bitmapSize);
}
entry.copyTextLocally();
mSize += size;
mCache.put(entry, texture);
} else {
texture->cleanup = true;
}
// Cleanup shadow
free(shadow.image);
}
return texture;
}
}; // namespace uirenderer
}; // namespace android
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