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Unified Diff: src/core/SkBitmapDevice.cpp

Issue 382243003: Revert of add readPixels() to SkBitmap (Closed) Base URL: https://skia.googlesource.com/skia.git@master
Patch Set: Created 6 years, 5 months ago
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Index: src/core/SkBitmapDevice.cpp
diff --git a/src/core/SkBitmapDevice.cpp b/src/core/SkBitmapDevice.cpp
index 09b3b605f85a3e4b36a28e77d88a75135abfae3b..86c5702f03845400a38fac4c6dd977fcbc8b136b 100644
--- a/src/core/SkBitmapDevice.cpp
+++ b/src/core/SkBitmapDevice.cpp
@@ -141,7 +141,58 @@
return NULL;
}
+static void rect_memcpy(void* dst, size_t dstRB, const void* src, size_t srcRB, size_t bytesPerRow,
+ int rowCount) {
+ SkASSERT(bytesPerRow <= srcRB);
+ SkASSERT(bytesPerRow <= dstRB);
+ for (int i = 0; i < rowCount; ++i) {
+ memcpy(dst, src, bytesPerRow);
+ dst = (char*)dst + dstRB;
+ src = (const char*)src + srcRB;
+ }
+}
+
#include "SkConfig8888.h"
+
+static bool copy_pixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
+ const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRowBytes) {
+ if (srcInfo.dimensions() != dstInfo.dimensions()) {
+ return false;
+ }
+ if (4 == srcInfo.bytesPerPixel() && 4 == dstInfo.bytesPerPixel()) {
+ SkDstPixelInfo dstPI;
+ dstPI.fColorType = dstInfo.colorType();
+ dstPI.fAlphaType = dstInfo.alphaType();
+ dstPI.fPixels = dstPixels;
+ dstPI.fRowBytes = dstRowBytes;
+
+ SkSrcPixelInfo srcPI;
+ srcPI.fColorType = srcInfo.colorType();
+ srcPI.fAlphaType = srcInfo.alphaType();
+ srcPI.fPixels = srcPixels;
+ srcPI.fRowBytes = srcRowBytes;
+
+ return srcPI.convertPixelsTo(&dstPI, srcInfo.width(), srcInfo.height());
+ }
+ if (srcInfo.colorType() == dstInfo.colorType()) {
+ switch (srcInfo.colorType()) {
+ case kRGB_565_SkColorType:
+ case kAlpha_8_SkColorType:
+ break;
+ case kARGB_4444_SkColorType:
+ if (srcInfo.alphaType() != dstInfo.alphaType()) {
+ return false;
+ }
+ break;
+ default:
+ return false;
+ }
+ rect_memcpy(dstPixels, dstRowBytes, srcPixels, srcRowBytes,
+ srcInfo.width() * srcInfo.bytesPerPixel(), srcInfo.height());
+ }
+ // TODO: add support for more conversions as needed
+ return false;
+}
bool SkBitmapDevice::onWritePixels(const SkImageInfo& srcInfo, const void* srcPixels,
size_t srcRowBytes, int x, int y) {
@@ -157,7 +208,7 @@
void* dstPixels = fBitmap.getAddr(x, y);
size_t dstRowBytes = fBitmap.rowBytes();
- if (SkPixelInfo::CopyPixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes)) {
+ if (copy_pixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes)) {
fBitmap.notifyPixelsChanged();
return true;
}
@@ -166,7 +217,28 @@
bool SkBitmapDevice::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
int x, int y) {
- return fBitmap.readPixels(dstInfo, dstPixels, dstRowBytes, x, y);
+ // since we don't stop creating un-pixeled devices yet, check for no pixels here
+ if (NULL == fBitmap.getPixels()) {
+ return false;
+ }
+
+ SkImageInfo srcInfo = fBitmap.info();
+
+ // perhaps can relax these in the future
+ if (4 != dstInfo.bytesPerPixel()) {
+ return false;
+ }
+ if (4 != srcInfo.bytesPerPixel()) {
+ return false;
+ }
+
+ srcInfo.fWidth = dstInfo.width();
+ srcInfo.fHeight = dstInfo.height();
+
+ const void* srcPixels = fBitmap.getAddr(x, y);
+ const size_t srcRowBytes = fBitmap.rowBytes();
+
+ return copy_pixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes);
}
///////////////////////////////////////////////////////////////////////////////
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