зеркало из https://github.com/mozilla/moz-skia.git
add SkSafeRef / SkSafeUnref as inline static functions, to use in place of our
existing obj->safeRef(), which is unsafe since it can its 'if (this)' can be optimized away by some compilers. fix some overflows in mimpmap generation git-svn-id: http://skia.googlecode.com/svn/trunk@181 2bbb7eff-a529-9590-31e7-b0007b416f81
This commit is contained in:
reed@android.com
Родитель
ba974ccbdd
Коммит
149e2f6159
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@ -130,5 +130,22 @@ private:
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dst = src; \
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} while (0)
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/** Check if the argument is non-null, and if so, call obj->ref()
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*/
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template <typename T> static inline void SkSafeRef(T* obj) {
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if (obj) {
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obj->ref();
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}
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}
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/** Check if the argument is non-null, and if so, call obj->unref()
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*/
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template <typename T> static inline void SkSafeUnref(T* obj) {
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if (obj) {
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obj->unref();
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}
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}
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#endif
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@ -149,12 +149,26 @@ protected:
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}
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void drawBG(SkCanvas* canvas) {
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canvas->drawColor(SK_ColorWHITE);
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canvas->drawColor(SK_ColorGRAY);
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}
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virtual void onDraw(SkCanvas* canvas) {
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this->drawBG(canvas);
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if (true) {
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SkRect r;
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r.set(SkIntToScalar(0), SkIntToScalar(0),
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SkIntToScalar(220), SkIntToScalar(120));
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SkPaint p;
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canvas->saveLayer(&r, &p);
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canvas->drawColor(0xFFFF0000);
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p.setAlpha(1); // or 0
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p.setPorterDuffXfermode(SkPorterDuff::kSrc_Mode);
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canvas->drawOval(r, p);
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canvas->restore();
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return;
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}
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if (false) {
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SkRect r;
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r.set(SkIntToScalar(0), SkIntToScalar(0),
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@ -26,6 +26,10 @@
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#include "SkPackBits.h"
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#include <new>
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static bool isPos32Bits(const Sk64& value) {
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return !value.isNeg() && value.is32();
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}
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#ifdef SK_SUPPORT_MIPMAP
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struct MipLevel {
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void* fPixels;
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@ -40,9 +44,17 @@ struct SkBitmap::MipMap : SkNoncopyable {
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// Pixels[]
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static MipMap* Alloc(int levelCount, size_t pixelSize) {
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MipMap* mm = (MipMap*)sk_malloc_throw(sizeof(MipMap) +
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levelCount * sizeof(MipLevel) +
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pixelSize);
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if (levelCount < 0) {
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return NULL;
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}
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Sk64 size;
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size.setMul(levelCount + 1, sizeof(MipLevel));
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size.add(sizeof(MipMap));
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size.add(pixelSize);
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if (!isPos32Bits(size)) {
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return NULL;
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}
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MipMap* mm = (MipMap*)sk_malloc_throw(size.get32());
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mm->fRefCnt = 1;
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mm->fLevelCount = levelCount;
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return mm;
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@ -54,20 +66,17 @@ struct SkBitmap::MipMap : SkNoncopyable {
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const void* pixels() const { return levels() + fLevelCount; }
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void* pixels() { return levels() + fLevelCount; }
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void safeRef() {
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if (this) {
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SkASSERT(fRefCnt > 0);
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sk_atomic_inc(&fRefCnt);
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void ref() {
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if (SK_MaxS32 == sk_atomic_inc(&fRefCnt)) {
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sk_throw();
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}
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}
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void safeUnref() {
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if (this) {
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void unref() {
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SkASSERT(fRefCnt > 0);
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if (sk_atomic_dec(&fRefCnt) == 1) {
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sk_free(this);
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}
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}
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}
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};
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#endif
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@ -98,7 +107,7 @@ SkBitmap& SkBitmap::operator=(const SkBitmap& src) {
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// inc src reference counts
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src.fPixelRef->safeRef();
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#ifdef SK_SUPPORT_MIPMAP
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src.fMipMap->safeRef();
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SkSafeRef(src.fMipMap);
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#endif
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// we reset our locks if we get blown away
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@ -175,33 +184,40 @@ int SkBitmap::ComputeBytesPerPixel(SkBitmap::Config config) {
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}
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int SkBitmap::ComputeRowBytes(Config c, int width) {
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int rowBytes = 0;
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if (width < 0) {
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return 0;
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}
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Sk64 rowBytes;
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rowBytes.setZero();
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switch (c) {
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case kNo_Config:
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case kRLE_Index8_Config:
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// assume that the bitmap has no pixels to draw to
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rowBytes = 0;
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break;
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case kA1_Config:
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rowBytes = (width + 7) >> 3;
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rowBytes.set(width);
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rowBytes.add(7);
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rowBytes.shiftRight(3);
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break;
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case kA8_Config:
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case kIndex8_Config:
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rowBytes = width;
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rowBytes.set(width);
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break;
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case kRGB_565_Config:
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case kARGB_4444_Config:
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rowBytes = width << 1;
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rowBytes.set(width);
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rowBytes.shiftLeft(1);
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break;
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case kARGB_8888_Config:
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rowBytes = width << 2;
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rowBytes.set(width);
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rowBytes.shiftLeft(2);
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break;
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default:
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SkASSERT(!"unknown config");
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break;
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}
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return rowBytes;
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return isPos32Bits(rowBytes) ? rowBytes.get32() : 0;
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}
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Sk64 SkBitmap::ComputeSize64(Config c, int width, int height) {
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@ -212,18 +228,25 @@ Sk64 SkBitmap::ComputeSize64(Config c, int width, int height) {
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size_t SkBitmap::ComputeSize(Config c, int width, int height) {
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Sk64 size = SkBitmap::ComputeSize64(c, width, height);
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if (size.isNeg() || !size.is32()) {
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return 0;
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}
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return size.get32();
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return isPos32Bits(size) ? size.get32() : 0;
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}
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void SkBitmap::setConfig(Config c, int width, int height, int rowBytes) {
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this->freePixels();
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if ((width | height | rowBytes) < 0) {
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ERROR:
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this->reset();
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return;
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}
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if (rowBytes == 0) {
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rowBytes = SkBitmap::ComputeRowBytes(c, width);
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if (0 == rowBytes && kNo_Config != c) {
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goto ERROR;
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}
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}
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fConfig = SkToU8(c);
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fWidth = width;
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fHeight = height;
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@ -248,10 +271,12 @@ void SkBitmap::updatePixelsFromRef() const {
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} else {
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SkASSERT(0 == fPixelLockCount);
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fPixels = NULL;
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fColorTable->safeUnref();
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if (fColorTable) {
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fColorTable->unref();
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fColorTable = NULL;
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}
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}
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}
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}
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SkPixelRef* SkBitmap::setPixelRef(SkPixelRef* pr, size_t offset) {
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@ -315,8 +340,10 @@ void SkBitmap::freePixels() {
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// if we're gonna free the pixels, we certainly need to free the mipmap
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this->freeMipMap();
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fColorTable->safeUnref();
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if (fColorTable) {
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fColorTable->unref();
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fColorTable = NULL;
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}
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if (NULL != fPixelRef) {
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if (fPixelLockCount > 0) {
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@ -332,8 +359,10 @@ void SkBitmap::freePixels() {
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void SkBitmap::freeMipMap() {
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#ifdef SK_SUPPORT_MIPMAP
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fMipMap->safeUnref();
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if (fMipMap) {
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fMipMap->unref();
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fMipMap = NULL;
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}
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#endif
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}
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@ -359,7 +388,7 @@ SkMallocPixelRef::SkMallocPixelRef(void* storage, size_t size,
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}
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SkMallocPixelRef::~SkMallocPixelRef() {
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fCTable->safeUnref();
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SkSafeUnref(fCTable);
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sk_free(fStorage);
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}
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@ -899,12 +928,17 @@ void SkBitmap::buildMipMap(bool forceRebuild) {
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return; // don't build mipmaps for these configs
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}
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SkAutoLockPixels alp(*this);
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if (!this->readyToDraw()) {
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return;
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}
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// whip through our loop to compute the exact size needed
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size_t size = 0;
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int maxLevels = 0;
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{
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unsigned width = this->width();
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unsigned height = this->height();
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int width = this->width();
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int height = this->height();
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for (;;) {
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width >>= 1;
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height >>= 1;
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@ -915,20 +949,29 @@ void SkBitmap::buildMipMap(bool forceRebuild) {
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maxLevels += 1;
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}
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}
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// nothing to build
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if (0 == maxLevels) {
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return;
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}
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SkBitmap srcBM(*this);
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srcBM.lockPixels();
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if (!srcBM.readyToDraw()) {
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return;
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}
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MipMap* mm = MipMap::Alloc(maxLevels, size);
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if (NULL == mm) {
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return;
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}
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MipLevel* level = mm->levels();
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uint8_t* addr = (uint8_t*)mm->pixels();
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unsigned width = this->width();
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unsigned height = this->height();
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int width = this->width();
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int height = this->height();
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unsigned rowBytes = this->rowBytes();
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SkBitmap srcBM(*this), dstBM;
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srcBM.lockPixels();
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SkBitmap dstBM;
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for (int i = 0; i < maxLevels; i++) {
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width >>= 1;
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@ -943,8 +986,8 @@ void SkBitmap::buildMipMap(bool forceRebuild) {
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dstBM.setConfig(config, width, height, rowBytes);
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dstBM.setPixels(addr);
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for (unsigned y = 0; y < height; y++) {
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for (unsigned x = 0; x < width; x++) {
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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proc(&dstBM, x, y, srcBM);
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}
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}
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@ -1251,7 +1294,7 @@ void SkBitmap::unflatten(SkFlattenableReadBuffer& buffer) {
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} else {
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buffer.skip(size);
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}
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ctable->safeUnref();
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SkSafeUnref(ctable);
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break;
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}
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case SERIALIZE_PIXELTYPE_NONE:
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@ -73,8 +73,8 @@
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009490320FB0A5B90063C792 /* SampleLayerMask.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 009490310FB0A5B90063C792 /* SampleLayerMask.cpp */; };
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009CC9190F65918A002185BE /* SampleFontScalerTest.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 009CC9180F65918A002185BE /* SampleFontScalerTest.cpp */; };
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00A41E4B0EFC312F00C9CBEB /* SampleArc.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 00A41E4A0EFC312F00C9CBEB /* SampleArc.cpp */; };
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00A8A3EE0FC25993006ED638 /* SampleEffects.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 00A8A3ED0FC25993006ED638 /* SampleEffects.cpp */; };
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00C55DA10F8552DC000CAC09 /* SampleGradients.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 00C55DA00F8552DC000CAC09 /* SampleGradients.cpp */; };
|
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00FF39140FC6ED2C00915187 /* SampleEffects.cpp in Sources */ = {isa = PBXBuildFile; fileRef = 00FF39130FC6ED2C00915187 /* SampleEffects.cpp */; };
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0156F80407C56A3000C6122B /* Foundation.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0156F80307C56A3000C6122B /* Foundation.framework */; };
|
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01FC44D507BD3BB800D228F4 /* Quartz.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 01FC44D407BD3BB800D228F4 /* Quartz.framework */; };
|
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8D0C4E8D0486CD37000505A6 /* InfoPlist.strings in Resources */ = {isa = PBXBuildFile; fileRef = 0867D6AAFE840B52C02AAC07 /* InfoPlist.strings */; };
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@ -198,9 +198,9 @@
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009490310FB0A5B90063C792 /* SampleLayerMask.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleLayerMask.cpp; path = ../../samplecode/SampleLayerMask.cpp; sourceTree = SOURCE_ROOT; };
|
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009CC9180F65918A002185BE /* SampleFontScalerTest.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleFontScalerTest.cpp; path = ../../samplecode/SampleFontScalerTest.cpp; sourceTree = SOURCE_ROOT; };
|
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00A41E4A0EFC312F00C9CBEB /* SampleArc.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleArc.cpp; path = ../../samplecode/SampleArc.cpp; sourceTree = SOURCE_ROOT; };
|
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00A8A3ED0FC25993006ED638 /* SampleEffects.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleEffects.cpp; path = ../../samplecode/SampleEffects.cpp; sourceTree = SOURCE_ROOT; };
|
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00C55DA00F8552DC000CAC09 /* SampleGradients.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleGradients.cpp; path = ../../samplecode/SampleGradients.cpp; sourceTree = SOURCE_ROOT; };
|
||||
00D6B5CB0F72DC4300C466B9 /* SampleFuzz.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleFuzz.cpp; path = ../../samplecode/SampleFuzz.cpp; sourceTree = SOURCE_ROOT; };
|
||||
00FF39130FC6ED2C00915187 /* SampleEffects.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; name = SampleEffects.cpp; path = ../../samplecode/SampleEffects.cpp; sourceTree = SOURCE_ROOT; };
|
||||
0156F80307C56A3000C6122B /* Foundation.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Foundation.framework; path = /System/Library/Frameworks/Foundation.framework; sourceTree = "<absolute>"; };
|
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01FC44D407BD3BB800D228F4 /* Quartz.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = Quartz.framework; path = /System/Library/Frameworks/Quartz.framework; sourceTree = "<absolute>"; };
|
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0867D6ABFE840B52C02AAC07 /* English */ = {isa = PBXFileReference; fileEncoding = 10; lastKnownFileType = text.plist.strings; name = English; path = English.lproj/InfoPlist.strings; sourceTree = "<group>"; };
|
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|
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@ -233,11 +233,11 @@
|
|||
00003C610EFC2287000FF73A /* samples */ = {
|
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isa = PBXGroup;
|
||||
children = (
|
||||
00FF39130FC6ED2C00915187 /* SampleEffects.cpp */,
|
||||
007A7CA40F01658C00A2D6EE /* SamplePicture.cpp */,
|
||||
00D6B5CB0F72DC4300C466B9 /* SampleFuzz.cpp */,
|
||||
00C55DA00F8552DC000CAC09 /* SampleGradients.cpp */,
|
||||
009490310FB0A5B90063C792 /* SampleLayerMask.cpp */,
|
||||
00A8A3ED0FC25993006ED638 /* SampleEffects.cpp */,
|
||||
003145310FB9B48F00B10956 /* SampleShapes.cpp */,
|
||||
009CC9180F65918A002185BE /* SampleFontScalerTest.cpp */,
|
||||
007A7CA50F01658C00A2D6EE /* SamplePoints.cpp */,
|
||||
|
|
@ -490,6 +490,7 @@
|
|||
files = (
|
||||
00003C660EFC22A8000FF73A /* SampleApp.cpp in Sources */,
|
||||
00003C680EFC22A8000FF73A /* SamplePath.cpp in Sources */,
|
||||
00003C690EFC22A8000FF73A /* SamplePathEffects.cpp in Sources */,
|
||||
00003C740EFC22CE000FF73A /* SkEvent.cpp in Sources */,
|
||||
00003C750EFC22CE000FF73A /* SkEventSink.cpp in Sources */,
|
||||
00003C760EFC22CE000FF73A /* SkMetaData.cpp in Sources */,
|
||||
|
|
@ -532,6 +533,7 @@
|
|||
007A7CB80F01658C00A2D6EE /* SampleStrokeText.cpp in Sources */,
|
||||
007A7CBA0F01658C00A2D6EE /* SampleText.cpp in Sources */,
|
||||
007A7CBB0F01658C00A2D6EE /* SampleTextAlpha.cpp in Sources */,
|
||||
007A7CBC0F01658C00A2D6EE /* SampleTextEffects.cpp in Sources */,
|
||||
007A7CBD0F01658C00A2D6EE /* SampleTextOnPath.cpp in Sources */,
|
||||
007A7CBE0F01658C00A2D6EE /* SampleTiling.cpp in Sources */,
|
||||
007A7CBF0F01658C00A2D6EE /* SampleTypeface.cpp in Sources */,
|
||||
|
|
@ -550,9 +552,7 @@
|
|||
003145200FB99CCE00B10956 /* SkRectShape.cpp in Sources */,
|
||||
003145320FB9B48F00B10956 /* SampleShapes.cpp in Sources */,
|
||||
003145370FB9BA4000B10956 /* SkGroupShape.cpp in Sources */,
|
||||
007A7CBC0F01658C00A2D6EE /* SampleTextEffects.cpp in Sources */,
|
||||
00003C690EFC22A8000FF73A /* SamplePathEffects.cpp in Sources */,
|
||||
00A8A3EE0FC25993006ED638 /* SampleEffects.cpp in Sources */,
|
||||
00FF39140FC6ED2C00915187 /* SampleEffects.cpp in Sources */,
|
||||
);
|
||||
runOnlyForDeploymentPostprocessing = 0;
|
||||
};
|
||||
|
|
|
|||
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