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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.
*/
#include <utils/JenkinsHash.h>
#include "Caches.h"
#include "Debug.h"
#include "FontRenderer.h"
#include "Properties.h"
#include "TextDropShadowCache.h"
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Cache support
///////////////////////////////////////////////////////////////////////////////
hash_t ShadowText::hash() const {
uint32_t hash = JenkinsHashMix(0, glyphCount);
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 (glyphs) {
hash = JenkinsHashMixShorts(hash, reinterpret_cast<const uint16_t*>(glyphs), glyphCount);
}
if (positions) {
for (uint32_t i = 0; i < glyphCount * 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.glyphCount) - int(rhs.glyphCount);
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.glyphs != rhs.glyphs) {
if (!lhs.glyphs) return -1;
if (!rhs.glyphs) return +1;
deltaInt = memcmp(lhs.glyphs, rhs.glyphs, lhs.glyphCount * sizeof(glyph_t));
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.glyphCount * sizeof(float) * 2);
}
return 0;
}
///////////////////////////////////////////////////////////////////////////////
// Constructors/destructor
///////////////////////////////////////////////////////////////////////////////
TextDropShadowCache::TextDropShadowCache()
: TextDropShadowCache(DeviceInfo::multiplyByResolution(2)) {}
TextDropShadowCache::TextDropShadowCache(uint32_t maxByteSize)
: mCache(LruCache<ShadowText, ShadowTexture*>::kUnlimitedCapacity)
, mSize(0)
, mMaxSize(maxByteSize) {
mCache.setOnEntryRemovedListener(this);
mDebugEnabled = Properties::debugLevel & kDebugMoreCaches;
}
TextDropShadowCache::~TextDropShadowCache() {
mCache.clear();
}
///////////////////////////////////////////////////////////////////////////////
// Size management
///////////////////////////////////////////////////////////////////////////////
uint32_t TextDropShadowCache::getSize() {
return mSize;
}
uint32_t TextDropShadowCache::getMaxSize() {
return mMaxSize;
}
///////////////////////////////////////////////////////////////////////////////
// Callbacks
///////////////////////////////////////////////////////////////////////////////
void TextDropShadowCache::operator()(ShadowText&, ShadowTexture*& texture) {
if (texture) {
mSize -= texture->objectSize();
if (mDebugEnabled) {
ALOGD("Shadow texture deleted, size = %d", texture->bitmapSize);
}
texture->deleteTexture();
delete texture;
}
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
void TextDropShadowCache::clear() {
mCache.clear();
}
ShadowTexture* TextDropShadowCache::get(const SkPaint* paint, const glyph_t* glyphs, int numGlyphs,
float radius, const float* positions) {
ShadowText entry(paint, radius, numGlyphs, glyphs, positions);
ShadowTexture* texture = mCache.get(entry);
if (!texture) {
SkPaint paintCopy(*paint);
paintCopy.setTextAlign(SkPaint::kLeft_Align);
FontRenderer::DropShadow shadow =
mRenderer->renderDropShadow(&paintCopy, glyphs, numGlyphs, radius, positions);
if (!shadow.image) {
return nullptr;
}
Caches& caches = Caches::getInstance();
texture = new ShadowTexture(caches);
texture->left = shadow.penX;
texture->top = shadow.penY;
texture->generation = 0;
texture->blend = true;
const uint32_t size = shadow.width * shadow.height;
// Don't even try to cache a bitmap that's bigger than the cache
if (size < mMaxSize) {
while (mSize + size > mMaxSize) {
LOG_ALWAYS_FATAL_IF(!mCache.removeOldest(),
"Failed to remove oldest from cache. mSize = %" PRIu32
", mCache.size() = %zu",
mSize, mCache.size());
}
}
// Textures are Alpha8
texture->upload(GL_ALPHA, shadow.width, shadow.height, 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 += texture->objectSize();
mCache.put(entry, texture);
} else {
texture->cleanup = true;
}
// Cleanup shadow
free(shadow.image);
}
return texture;
}
}; // namespace uirenderer
}; // namespace android