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/*
* Copyright (C) 2013 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 <SkBitmap.h>
#include <SkCanvas.h>
#include <SkColor.h>
#include <SkPaint.h>
#include <SkPath.h>
#include <SkRect.h>
#include <utils/JenkinsHash.h>
#include <utils/Trace.h>
#include "Caches.h"
#include "PathCache.h"
#include "thread/Signal.h"
#include "thread/TaskProcessor.h"
#include <cutils/properties.h>
namespace android {
namespace uirenderer {
///////////////////////////////////////////////////////////////////////////////
// Cache entries
///////////////////////////////////////////////////////////////////////////////
PathDescription::PathDescription()
: type(kShapeNone)
, join(SkPaint::kDefault_Join)
, cap(SkPaint::kDefault_Cap)
, style(SkPaint::kFill_Style)
, miter(4.0f)
, strokeWidth(1.0f)
, pathEffect(nullptr) {
memset(&shape, 0, sizeof(Shape));
}
PathDescription::PathDescription(ShapeType type, const SkPaint* paint)
: type(type)
, join(paint->getStrokeJoin())
, cap(paint->getStrokeCap())
, style(paint->getStyle())
, miter(paint->getStrokeMiter())
, strokeWidth(paint->getStrokeWidth())
, pathEffect(paint->getPathEffect()) {
memset(&shape, 0, sizeof(Shape));
}
hash_t PathDescription::hash() const {
uint32_t hash = JenkinsHashMix(0, type);
hash = JenkinsHashMix(hash, join);
hash = JenkinsHashMix(hash, cap);
hash = JenkinsHashMix(hash, style);
hash = JenkinsHashMix(hash, android::hash_type(miter));
hash = JenkinsHashMix(hash, android::hash_type(strokeWidth));
hash = JenkinsHashMix(hash, android::hash_type(pathEffect));
hash = JenkinsHashMixBytes(hash, (uint8_t*) &shape, sizeof(Shape));
return JenkinsHashWhiten(hash);
}
///////////////////////////////////////////////////////////////////////////////
// Utilities
///////////////////////////////////////////////////////////////////////////////
bool PathCache::canDrawAsConvexPath(SkPath* path, const SkPaint* paint) {
// NOTE: This should only be used after PathTessellator handles joins properly
return paint->getPathEffect() == nullptr && path->getConvexity() == SkPath::kConvex_Convexity;
}
void PathCache::computePathBounds(const SkPath* path, const SkPaint* paint,
float& left, float& top, float& offset, uint32_t& width, uint32_t& height) {
const SkRect& bounds = path->getBounds();
PathCache::computeBounds(bounds, paint, left, top, offset, width, height);
}
void PathCache::computeBounds(const SkRect& bounds, const SkPaint* paint,
float& left, float& top, float& offset, uint32_t& width, uint32_t& height) {
const float pathWidth = std::max(bounds.width(), 1.0f);
const float pathHeight = std::max(bounds.height(), 1.0f);
left = bounds.fLeft;
top = bounds.fTop;
offset = (int) floorf(std::max(paint->getStrokeWidth(), 1.0f) * 1.5f + 0.5f);
width = uint32_t(pathWidth + offset * 2.0 + 0.5);
height = uint32_t(pathHeight + offset * 2.0 + 0.5);
}
static void initBitmap(SkBitmap& bitmap, uint32_t width, uint32_t height) {
bitmap.allocPixels(SkImageInfo::MakeA8(width, height));
bitmap.eraseColor(0);
}
static void initPaint(SkPaint& paint) {
// Make sure the paint is opaque, color, alpha, filter, etc.
// will be applied later when compositing the alpha8 texture
paint.setColor(SK_ColorBLACK);
paint.setAlpha(255);
paint.setColorFilter(nullptr);
paint.setMaskFilter(nullptr);
paint.setShader(nullptr);
SkXfermode* mode = SkXfermode::Create(SkXfermode::kSrc_Mode);
SkSafeUnref(paint.setXfermode(mode));
}
static void drawPath(const SkPath *path, const SkPaint* paint, SkBitmap& bitmap,
float left, float top, float offset, uint32_t width, uint32_t height) {
initBitmap(bitmap, width, height);
SkPaint pathPaint(*paint);
initPaint(pathPaint);
SkCanvas canvas(bitmap);
canvas.translate(-left + offset, -top + offset);
canvas.drawPath(*path, pathPaint);
}
///////////////////////////////////////////////////////////////////////////////
// Cache constructor/destructor
///////////////////////////////////////////////////////////////////////////////
PathCache::PathCache():
mCache(LruCache<PathDescription, PathTexture*>::kUnlimitedCapacity),
mSize(0), mMaxSize(MB(DEFAULT_PATH_CACHE_SIZE)) {
char property[PROPERTY_VALUE_MAX];
if (property_get(PROPERTY_PATH_CACHE_SIZE, property, nullptr) > 0) {
INIT_LOGD(" Setting path cache size to %sMB", property);
mMaxSize = MB(atof(property));
} else {
INIT_LOGD(" Using default path cache size of %.2fMB", DEFAULT_PATH_CACHE_SIZE);
}
mCache.setOnEntryRemovedListener(this);
GLint maxTextureSize;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTextureSize);
mMaxTextureSize = maxTextureSize;
mDebugEnabled = Properties::debugLevel & kDebugCaches;
}
PathCache::~PathCache() {
mCache.clear();
}
///////////////////////////////////////////////////////////////////////////////
// Size management
///////////////////////////////////////////////////////////////////////////////
uint32_t PathCache::getSize() {
return mSize;
}
uint32_t PathCache::getMaxSize() {
return mMaxSize;
}
///////////////////////////////////////////////////////////////////////////////
// Callbacks
///////////////////////////////////////////////////////////////////////////////
void PathCache::operator()(PathDescription& entry, PathTexture*& texture) {
removeTexture(texture);
}
///////////////////////////////////////////////////////////////////////////////
// Caching
///////////////////////////////////////////////////////////////////////////////
void PathCache::removeTexture(PathTexture* texture) {
if (texture) {
const uint32_t size = texture->width * texture->height;
// If there is a pending task we must wait for it to return
// before attempting our cleanup
const sp<Task<SkBitmap*> >& task = texture->task();
if (task != nullptr) {
task->getResult();
texture->clearTask();
} else {
// If there is a pending task, the path was not added
// to the cache and the size wasn't increased
if (size > mSize) {
ALOGE("Removing path texture of size %d will leave "
"the cache in an inconsistent state", size);
}
mSize -= size;
}
PATH_LOGD("PathCache::delete name, size, mSize = %d, %d, %d",
texture->id, size, mSize);
if (mDebugEnabled) {
ALOGD("Shape deleted, size = %d", size);
}
if (texture->id) {
Caches::getInstance().textureState().deleteTexture(texture->id);
}
delete texture;
}
}
void PathCache::purgeCache(uint32_t width, uint32_t height) {
const uint32_t size = width * height;
// Don't even try to cache a bitmap that's bigger than the cache
if (size < mMaxSize) {
while (mSize + size > mMaxSize) {
mCache.removeOldest();
}
}
}
void PathCache::trim() {
while (mSize > mMaxSize) {
mCache.removeOldest();
}
}
PathTexture* PathCache::addTexture(const PathDescription& entry, const SkPath *path,
const SkPaint* paint) {
ATRACE_NAME("Generate Path Texture");
float left, top, offset;
uint32_t width, height;
computePathBounds(path, paint, left, top, offset, width, height);
if (!checkTextureSize(width, height)) return nullptr;
purgeCache(width, height);
SkBitmap bitmap;
drawPath(path, paint, bitmap, left, top, offset, width, height);
PathTexture* texture = new PathTexture(Caches::getInstance(),
left, top, offset, width, height,
path->getGenerationID());
generateTexture(entry, &bitmap, texture);
return texture;
}
void PathCache::generateTexture(const PathDescription& entry, SkBitmap* bitmap,
PathTexture* texture, bool addToCache) {
generateTexture(*bitmap, texture);
// Note here that we upload to a texture even if it's bigger than mMaxSize.
// Such an entry in mCache will only be temporary, since it will be evicted
// immediately on trim, or on any other Path entering the cache.
uint32_t size = texture->width * texture->height;
mSize += size;
PATH_LOGD("PathCache::get/create: name, size, mSize = %d, %d, %d",
texture->id, size, mSize);
if (mDebugEnabled) {
ALOGD("Shape created, size = %d", size);
}
if (addToCache) {
mCache.put(entry, texture);
}
}
void PathCache::clear() {
mCache.clear();
}
void PathCache::generateTexture(SkBitmap& bitmap, Texture* texture) {
ATRACE_NAME("Upload Path Texture");
SkAutoLockPixels alp(bitmap);
if (!bitmap.readyToDraw()) {
ALOGE("Cannot generate texture from bitmap");
return;
}
glGenTextures(1, &texture->id);
Caches::getInstance().textureState().bindTexture(texture->id);
// Textures are Alpha8
glPixelStorei(GL_UNPACK_ALIGNMENT, 1);
texture->blend = true;
glTexImage2D(GL_TEXTURE_2D, 0, GL_ALPHA, texture->width, texture->height, 0,
GL_ALPHA, GL_UNSIGNED_BYTE, bitmap.getPixels());
texture->setFilter(GL_LINEAR);
texture->setWrap(GL_CLAMP_TO_EDGE);
}
///////////////////////////////////////////////////////////////////////////////
// Path precaching
///////////////////////////////////////////////////////////////////////////////
PathCache::PathProcessor::PathProcessor(Caches& caches):
TaskProcessor<SkBitmap*>(&caches.tasks), mMaxTextureSize(caches.maxTextureSize) {
}
void PathCache::PathProcessor::onProcess(const sp<Task<SkBitmap*> >& task) {
PathTask* t = static_cast<PathTask*>(task.get());
ATRACE_NAME("pathPrecache");
float left, top, offset;
uint32_t width, height;
PathCache::computePathBounds(&t->path, &t->paint, left, top, offset, width, height);
PathTexture* texture = t->texture;
texture->left = left;
texture->top = top;
texture->offset = offset;
texture->width = width;
texture->height = height;
if (width <= mMaxTextureSize && height <= mMaxTextureSize) {
SkBitmap* bitmap = new SkBitmap();
drawPath(&t->path, &t->paint, *bitmap, left, top, offset, width, height);
t->setResult(bitmap);
} else {
texture->width = 0;
texture->height = 0;
t->setResult(nullptr);
}
}
///////////////////////////////////////////////////////////////////////////////
// Paths
///////////////////////////////////////////////////////////////////////////////
void PathCache::removeDeferred(const SkPath* path) {
Mutex::Autolock l(mLock);
mGarbage.push_back(path->getGenerationID());
}
void PathCache::clearGarbage() {
Vector<PathDescription> pathsToRemove;
{ // scope for the mutex
Mutex::Autolock l(mLock);
for (const uint32_t generationID : mGarbage) {
LruCache<PathDescription, PathTexture*>::Iterator iter(mCache);
while (iter.next()) {
const PathDescription& key = iter.key();
if (key.type == kShapePath && key.shape.path.mGenerationID == generationID) {
pathsToRemove.push(key);
}
}
}
mGarbage.clear();
}
for (size_t i = 0; i < pathsToRemove.size(); i++) {
mCache.remove(pathsToRemove.itemAt(i));
}
}
PathTexture* PathCache::get(const SkPath* path, const SkPaint* paint) {
PathDescription entry(kShapePath, paint);
entry.shape.path.mGenerationID = path->getGenerationID();
PathTexture* texture = mCache.get(entry);
if (!texture) {
texture = addTexture(entry, path, paint);
} else {
// A bitmap is attached to the texture, this means we need to
// upload it as a GL texture
const sp<Task<SkBitmap*> >& task = texture->task();
if (task != nullptr) {
// But we must first wait for the worker thread to be done
// producing the bitmap, so let's wait
SkBitmap* bitmap = task->getResult();
if (bitmap) {
generateTexture(entry, bitmap, texture, false);
texture->clearTask();
} else {
ALOGW("Path too large to be rendered into a texture");
texture->clearTask();
texture = nullptr;
mCache.remove(entry);
}
}
}
return texture;
}
void PathCache::remove(const SkPath* path, const SkPaint* paint)
{
PathDescription entry(kShapePath, paint);
entry.shape.path.mGenerationID = path->getGenerationID();
mCache.remove(entry);
}
void PathCache::precache(const SkPath* path, const SkPaint* paint) {
if (!Caches::getInstance().tasks.canRunTasks()) {
return;
}
PathDescription entry(kShapePath, paint);
entry.shape.path.mGenerationID = path->getGenerationID();
PathTexture* texture = mCache.get(entry);
bool generate = false;
if (!texture) {
generate = true;
}
if (generate) {
// It is important to specify the generation ID so we do not
// attempt to precache the same path several times
texture = new PathTexture(Caches::getInstance(), path->getGenerationID());
sp<PathTask> task = new PathTask(path, paint, texture);
texture->setTask(task);
// During the precaching phase we insert path texture objects into
// the cache that do not point to any GL texture. They are instead
// treated as a task for the precaching worker thread. This is why
// we do not check the cache limit when inserting these objects.
// The conversion into GL texture will happen in get(), when a client
// asks for a path texture. This is also when the cache limit will
// be enforced.
mCache.put(entry, texture);
if (mProcessor == nullptr) {
mProcessor = new PathProcessor(Caches::getInstance());
}
mProcessor->add(task);
}
}
///////////////////////////////////////////////////////////////////////////////
// Rounded rects
///////////////////////////////////////////////////////////////////////////////
PathTexture* PathCache::getRoundRect(float width, float height,
float rx, float ry, const SkPaint* paint) {
PathDescription entry(kShapeRoundRect, paint);
entry.shape.roundRect.mWidth = width;
entry.shape.roundRect.mHeight = height;
entry.shape.roundRect.mRx = rx;
entry.shape.roundRect.mRy = ry;
PathTexture* texture = get(entry);
if (!texture) {
SkPath path;
SkRect r;
r.set(0.0f, 0.0f, width, height);
path.addRoundRect(r, rx, ry, SkPath::kCW_Direction);
texture = addTexture(entry, &path, paint);
}
return texture;
}
///////////////////////////////////////////////////////////////////////////////
// Circles
///////////////////////////////////////////////////////////////////////////////
PathTexture* PathCache::getCircle(float radius, const SkPaint* paint) {
PathDescription entry(kShapeCircle, paint);
entry.shape.circle.mRadius = radius;
PathTexture* texture = get(entry);
if (!texture) {
SkPath path;
path.addCircle(radius, radius, radius, SkPath::kCW_Direction);
texture = addTexture(entry, &path, paint);
}
return texture;
}
///////////////////////////////////////////////////////////////////////////////
// Ovals
///////////////////////////////////////////////////////////////////////////////
PathTexture* PathCache::getOval(float width, float height, const SkPaint* paint) {
PathDescription entry(kShapeOval, paint);
entry.shape.oval.mWidth = width;
entry.shape.oval.mHeight = height;
PathTexture* texture = get(entry);
if (!texture) {
SkPath path;
SkRect r;
r.set(0.0f, 0.0f, width, height);
path.addOval(r, SkPath::kCW_Direction);
texture = addTexture(entry, &path, paint);
}
return texture;
}
///////////////////////////////////////////////////////////////////////////////
// Rects
///////////////////////////////////////////////////////////////////////////////
PathTexture* PathCache::getRect(float width, float height, const SkPaint* paint) {
PathDescription entry(kShapeRect, paint);
entry.shape.rect.mWidth = width;
entry.shape.rect.mHeight = height;
PathTexture* texture = get(entry);
if (!texture) {
SkPath path;
SkRect r;
r.set(0.0f, 0.0f, width, height);
path.addRect(r, SkPath::kCW_Direction);
texture = addTexture(entry, &path, paint);
}
return texture;
}
///////////////////////////////////////////////////////////////////////////////
// Arcs
///////////////////////////////////////////////////////////////////////////////
PathTexture* PathCache::getArc(float width, float height,
float startAngle, float sweepAngle, bool useCenter, const SkPaint* paint) {
PathDescription entry(kShapeArc, paint);
entry.shape.arc.mWidth = width;
entry.shape.arc.mHeight = height;
entry.shape.arc.mStartAngle = startAngle;
entry.shape.arc.mSweepAngle = sweepAngle;
entry.shape.arc.mUseCenter = useCenter;
PathTexture* texture = get(entry);
if (!texture) {
SkPath path;
SkRect r;
r.set(0.0f, 0.0f, width, height);
if (useCenter) {
path.moveTo(r.centerX(), r.centerY());
}
path.arcTo(r, startAngle, sweepAngle, !useCenter);
if (useCenter) {
path.close();
}
texture = addTexture(entry, &path, paint);
}
return texture;
}
}; // namespace uirenderer
}; // namespace android