static jboolean Bitmap_sameAs(JNIEnv* env, jobject, jlong bm0Handle,
jlong bm1Handle) {
const SkBitmap* bm0 = reinterpret_cast<SkBitmap*>(bm0Handle);
const SkBitmap* bm1 = reinterpret_cast<SkBitmap*>(bm1Handle);
if (bm0->width() != bm1->width() ||
bm0->height() != bm1->height() ||
bm0->colorType() != bm1->colorType()) {
return JNI_FALSE;
}
SkAutoLockPixels alp0(*bm0);
SkAutoLockPixels alp1(*bm1);
// if we can't load the pixels, return false
if (NULL == bm0->getPixels() || NULL == bm1->getPixels()) {
return JNI_FALSE;
}
if (bm0->colorType() == kIndex_8_SkColorType) {
SkColorTable* ct0 = bm0->getColorTable();
SkColorTable* ct1 = bm1->getColorTable();
if (NULL == ct0 || NULL == ct1) {
return JNI_FALSE;
}
if (ct0->count() != ct1->count()) {
return JNI_FALSE;
}
SkAutoLockColors alc0(ct0);
SkAutoLockColors alc1(ct1);
const size_t size = ct0->count() * sizeof(SkPMColor);
if (memcmp(alc0.colors(), alc1.colors(), size) != 0) {
return JNI_FALSE;
}
}
// now compare each scanline. We can't do the entire buffer at once,
// since we don't care about the pixel values that might extend beyond
// the width (since the scanline might be larger than the logical width)
const int h = bm0->height();
const size_t size = bm0->width() * bm0->bytesPerPixel();
for (int y = 0; y < h; y++) {
// SkBitmap::getAddr(int, int) may return NULL due to unrecognized config
// (ex: kRLE_Index8_Config). This will cause memcmp method to crash. Since bm0
// and bm1 both have pixel data() (have passed NULL == getPixels() check),
// those 2 bitmaps should be valid (only unrecognized), we return JNI_FALSE
// to warn user those 2 unrecognized config bitmaps may be different.
void *bm0Addr = bm0->getAddr(0, y);
void *bm1Addr = bm1->getAddr(0, y);
if(bm0Addr == NULL || bm1Addr == NULL) {
return JNI_FALSE;
}
if (memcmp(bm0Addr, bm1Addr, size) != 0) {
return JNI_FALSE;
}
}
return JNI_TRUE;
}
static jboolean Bitmap_sameAs(JNIEnv* env, jobject, jlong bm0Handle,
jlong bm1Handle) {
const SkBitmap* bm0 = reinterpret_cast<SkBitmap*>(bm0Handle);
const SkBitmap* bm1 = reinterpret_cast<SkBitmap*>(bm1Handle);
if (bm0->width() != bm1->width() ||
bm0->height() != bm1->height() ||
bm0->config() != bm1->config()) {
return JNI_FALSE;
}
SkAutoLockPixels alp0(*bm0);
SkAutoLockPixels alp1(*bm1);
// if we can't load the pixels, return false
if (NULL == bm0->getPixels() || NULL == bm1->getPixels()) {
return JNI_FALSE;
}
if (bm0->config() == SkBitmap::kIndex8_Config) {
SkColorTable* ct0 = bm0->getColorTable();
SkColorTable* ct1 = bm1->getColorTable();
if (NULL == ct0 || NULL == ct1) {
return JNI_FALSE;
}
if (ct0->count() != ct1->count()) {
return JNI_FALSE;
}
SkAutoLockColors alc0(ct0);
SkAutoLockColors alc1(ct1);
const size_t size = ct0->count() * sizeof(SkPMColor);
if (memcmp(alc0.colors(), alc1.colors(), size) != 0) {
return JNI_FALSE;
}
}
// now compare each scanline. We can't do the entire buffer at once,
// since we don't care about the pixel values that might extend beyond
// the width (since the scanline might be larger than the logical width)
const int h = bm0->height();
const size_t size = bm0->width() * bm0->bytesPerPixel();
for (int y = 0; y < h; y++) {
if (memcmp(bm0->getAddr(0, y), bm1->getAddr(0, y), size) != 0) {
return JNI_FALSE;
}
}
return JNI_TRUE;
}