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-rw-r--r--include/core/SkBitmap.h22
-rw-r--r--include/core/SkCanvas.h21
-rw-r--r--src/core/SkBitmap.cpp127
-rw-r--r--src/core/SkBitmapDevice.cpp76
-rw-r--r--src/core/SkConfig8888.cpp142
-rw-r--r--src/core/SkConfig8888.h4
-rw-r--r--tests/BitmapCopyTest.cpp95
7 files changed, 346 insertions, 141 deletions
diff --git a/include/core/SkBitmap.h b/include/core/SkBitmap.h
index 51e9a9243a..541db79bb3 100644
--- a/include/core/SkBitmap.h
+++ b/include/core/SkBitmap.h
@@ -591,6 +591,28 @@ public:
}
/**
+ * Copy the bitmap's pixels into the specified buffer (pixels + rowBytes),
+ * converting them into the requested format (SkImageInfo). The src pixels are read
+ * starting at the specified (srcX,srcY) offset, relative to the top-left corner.
+ *
+ * The specified ImageInfo and (srcX,srcY) offset specifies a source rectangle
+ *
+ * srcR.setXYWH(srcX, srcY, dstInfo.width(), dstInfo.height());
+ *
+ * srcR is intersected with the bounds of the bitmap. If this intersection is not empty,
+ * then we have two sets of pixels (of equal size). Replace the dst pixels with the
+ * corresponding src pixels, performing any colortype/alphatype transformations needed
+ * (in the case where the src and dst have different colortypes or alphatypes).
+ *
+ * This call can fail, returning false, for several reasons:
+ * - If srcR does not intersect the bitmap bounds.
+ * - If the requested colortype/alphatype cannot be converted from the src's types.
+ * - If the src pixels are not available.
+ */
+ bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
+ int srcX, int srcY) const;
+
+ /**
* Returns true if this bitmap's pixels can be converted into the requested
* colorType, such that copyTo() could succeed.
*/
diff --git a/include/core/SkCanvas.h b/include/core/SkCanvas.h
index 424c12dbf3..6bd3cc5363 100644
--- a/include/core/SkCanvas.h
+++ b/include/core/SkCanvas.h
@@ -234,30 +234,31 @@ public:
/**
* Copy the pixels from the base-layer into the specified buffer (pixels + rowBytes),
* converting them into the requested format (SkImageInfo). The base-layer pixels are read
- * starting at the specified (x,y) location in the coordinate system of the base-layer.
+ * starting at the specified (srcX,srcY) location in the coordinate system of the base-layer.
*
- * The specified ImageInfo and (x,y) offset specifies a source rectangle
+ * The specified ImageInfo and (srcX,srcY) offset specifies a source rectangle
*
- * srcR(x, y, info.width(), info.height());
+ * srcR.setXYWH(srcX, srcY, dstInfo.width(), dstInfo.height());
*
- * SrcR is intersected with the bounds of the base-layer. If this intersection is not empty,
- * then we have two sets of pixels (of equal size), the "src" specified by base-layer at (x,y)
- * and the "dst" by info+pixels+rowBytes. Replace the dst pixels with the corresponding src
- * pixels, performing any colortype/alphatype transformations needed (in the case where the
- * src and dst have different colortypes or alphatypes).
+ * srcR is intersected with the bounds of the base-layer. If this intersection is not empty,
+ * then we have two sets of pixels (of equal size). Replace the dst pixels with the
+ * corresponding src pixels, performing any colortype/alphatype transformations needed
+ * (in the case where the src and dst have different colortypes or alphatypes).
*
* This call can fail, returning false, for several reasons:
+ * - If srcR does not intersect the base-layer bounds.
* - If the requested colortype/alphatype cannot be converted from the base-layer's types.
* - If this canvas is not backed by pixels (e.g. picture or PDF)
*/
- bool readPixels(const SkImageInfo&, void* pixels, size_t rowBytes, int x, int y);
+ bool readPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
+ int srcX, int srcY);
/**
* Helper for calling readPixels(info, ...). This call will check if bitmap has been allocated.
* If not, it will attempt to call allocPixels(). If this fails, it will return false. If not,
* it calls through to readPixels(info, ...) and returns its result.
*/
- bool readPixels(SkBitmap* bitmap, int x, int y);
+ bool readPixels(SkBitmap* bitmap, int srcX, int srcY);
/**
* Helper for allocating pixels and then calling readPixels(info, ...). The bitmap is resized
diff --git a/src/core/SkBitmap.cpp b/src/core/SkBitmap.cpp
index 651152e703..9816711225 100644
--- a/src/core/SkBitmap.cpp
+++ b/src/core/SkBitmap.cpp
@@ -821,11 +821,13 @@ bool SkBitmap::extractSubset(SkBitmap* result, const SkIRect& subset) const {
#include "SkPaint.h"
bool SkBitmap::canCopyTo(SkColorType dstColorType) const {
- if (this->colorType() == kUnknown_SkColorType) {
+ const SkColorType srcCT = this->colorType();
+
+ if (srcCT == kUnknown_SkColorType) {
return false;
}
- bool sameConfigs = (this->colorType() == dstColorType);
+ bool sameConfigs = (srcCT == dstColorType);
switch (dstColorType) {
case kAlpha_8_SkColorType:
case kRGB_565_SkColorType:
@@ -838,15 +840,66 @@ bool SkBitmap::canCopyTo(SkColorType dstColorType) const {
}
break;
case kARGB_4444_SkColorType:
- return sameConfigs || kN32_SkColorType == this->colorType();
+ return sameConfigs || kN32_SkColorType == srcCT || kIndex_8_SkColorType == srcCT;
default:
return false;
}
return true;
}
-bool SkBitmap::copyTo(SkBitmap* dst, SkColorType dstColorType,
- Allocator* alloc) const {
+#include "SkConfig8888.h"
+
+bool SkBitmap::readPixels(const SkImageInfo& requestedDstInfo, void* dstPixels, size_t dstRB,
+ int x, int y) const {
+ if (kUnknown_SkColorType == requestedDstInfo.colorType()) {
+ return false;
+ }
+ if (NULL == dstPixels || dstRB < requestedDstInfo.minRowBytes()) {
+ return false;
+ }
+ if (0 == requestedDstInfo.width() || 0 == requestedDstInfo.height()) {
+ return false;
+ }
+
+ SkIRect srcR = SkIRect::MakeXYWH(x, y, requestedDstInfo.width(), requestedDstInfo.height());
+ if (!srcR.intersect(0, 0, this->width(), this->height())) {
+ return false;
+ }
+
+ SkImageInfo dstInfo = requestedDstInfo;
+ // the intersect may have shrunk info's logical size
+ dstInfo.fWidth = srcR.width();
+ dstInfo.fHeight = srcR.height();
+
+ // if x or y are negative, then we have to adjust pixels
+ if (x > 0) {
+ x = 0;
+ }
+ if (y > 0) {
+ y = 0;
+ }
+ // here x,y are either 0 or negative
+ dstPixels = ((char*)dstPixels - y * dstRB - x * dstInfo.bytesPerPixel());
+
+ //////////////
+
+ SkAutoLockPixels alp(*this);
+
+ // since we don't stop creating un-pixeled devices yet, check for no pixels here
+ if (NULL == this->getPixels()) {
+ return false;
+ }
+
+ SkImageInfo srcInfo = this->info();
+ srcInfo.fWidth = dstInfo.width();
+ srcInfo.fHeight = dstInfo.height();
+
+ const void* srcPixels = this->getAddr(srcR.x(), srcR.y());
+ return SkPixelInfo::CopyPixels(dstInfo, dstPixels, dstRB, srcInfo, srcPixels, this->rowBytes(),
+ this->getColorTable());
+}
+
+bool SkBitmap::copyTo(SkBitmap* dst, SkColorType dstColorType, Allocator* alloc) const {
if (!this->canCopyTo(dstColorType)) {
return false;
}
@@ -919,59 +972,21 @@ bool SkBitmap::copyTo(SkBitmap* dst, SkColorType dstColorType,
// returned false.
SkASSERT(tmpDst.pixelRef() != NULL);
- /* do memcpy for the same configs cases, else use drawing
- */
- if (src->colorType() == dstColorType) {
- if (tmpDst.getSize() == src->getSize()) {
- memcpy(tmpDst.getPixels(), src->getPixels(), src->getSafeSize());
+ if (!src->readPixels(tmpDst.info(), tmpDst.getPixels(), tmpDst.rowBytes(), 0, 0)) {
+ return false;
+ }
- SkPixelRef* dstPixelRef = tmpDst.pixelRef();
- if (dstPixelRef->info() == fPixelRef->info()) {
- dstPixelRef->cloneGenID(*fPixelRef);
- }
- } else {
- const char* srcP = reinterpret_cast<const char*>(src->getPixels());
- char* dstP = reinterpret_cast<char*>(tmpDst.getPixels());
- // to be sure we don't read too much, only copy our logical pixels
- size_t bytesToCopy = tmpDst.width() * tmpDst.bytesPerPixel();
- for (int y = 0; y < tmpDst.height(); y++) {
- memcpy(dstP, srcP, bytesToCopy);
- srcP += src->rowBytes();
- dstP += tmpDst.rowBytes();
- }
+ // (for BitmapHeap) Clone the pixelref genID even though we have a new pixelref.
+ // The old copyTo impl did this, so we continue it for now.
+ //
+ // TODO: should we ignore rowbytes (i.e. getSize)? Then it could just be
+ // if (src_pixelref->info == dst_pixelref->info)
+ //
+ if (src->colorType() == dstColorType && tmpDst.getSize() == src->getSize()) {
+ SkPixelRef* dstPixelRef = tmpDst.pixelRef();
+ if (dstPixelRef->info() == fPixelRef->info()) {
+ dstPixelRef->cloneGenID(*fPixelRef);
}
- } else if (kARGB_4444_SkColorType == dstColorType
- && kN32_SkColorType == src->colorType()) {
- if (src->alphaType() == kUnpremul_SkAlphaType) {
- // Our method for converting to 4444 assumes premultiplied.
- return false;
- }
- SkASSERT(src->height() == tmpDst.height());
- SkASSERT(src->width() == tmpDst.width());
- for (int y = 0; y < src->height(); ++y) {
- SkPMColor16* SK_RESTRICT dstRow = (SkPMColor16*) tmpDst.getAddr16(0, y);
- SkPMColor* SK_RESTRICT srcRow = (SkPMColor*) src->getAddr32(0, y);
- DITHER_4444_SCAN(y);
- for (int x = 0; x < src->width(); ++x) {
- dstRow[x] = SkDitherARGB32To4444(srcRow[x],
- DITHER_VALUE(x));
- }
- }
- } else {
- if (tmpDst.alphaType() == kUnpremul_SkAlphaType) {
- // We do not support drawing to unpremultiplied bitmaps.
- return false;
- }
-
- // Always clear the dest in case one of the blitters accesses it
- // TODO: switch the allocation of tmpDst to call sk_calloc_throw
- tmpDst.eraseColor(SK_ColorTRANSPARENT);
-
- SkCanvas canvas(tmpDst);
- SkPaint paint;
-
- paint.setDither(true);
- canvas.drawBitmap(*src, 0, 0, &paint);
}
dst->swap(tmpDst);
diff --git a/src/core/SkBitmapDevice.cpp b/src/core/SkBitmapDevice.cpp
index 86c5702f03..09b3b605f8 100644
--- a/src/core/SkBitmapDevice.cpp
+++ b/src/core/SkBitmapDevice.cpp
@@ -141,59 +141,8 @@ void* SkBitmapDevice::onAccessPixels(SkImageInfo* info, size_t* rowBytes) {
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) {
// since we don't stop creating un-pixeled devices yet, check for no pixels here
@@ -208,7 +157,7 @@ bool SkBitmapDevice::onWritePixels(const SkImageInfo& srcInfo, const void* srcPi
void* dstPixels = fBitmap.getAddr(x, y);
size_t dstRowBytes = fBitmap.rowBytes();
- if (copy_pixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes)) {
+ if (SkPixelInfo::CopyPixels(dstInfo, dstPixels, dstRowBytes, srcInfo, srcPixels, srcRowBytes)) {
fBitmap.notifyPixelsChanged();
return true;
}
@@ -217,28 +166,7 @@ bool SkBitmapDevice::onWritePixels(const SkImageInfo& srcInfo, const void* srcPi
bool SkBitmapDevice::onReadPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
int x, int 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);
+ return fBitmap.readPixels(dstInfo, dstPixels, dstRowBytes, x, y);
}
///////////////////////////////////////////////////////////////////////////////
diff --git a/src/core/SkConfig8888.cpp b/src/core/SkConfig8888.cpp
index 189309dae6..b0572c0544 100644
--- a/src/core/SkConfig8888.cpp
+++ b/src/core/SkConfig8888.cpp
@@ -1,5 +1,15 @@
+/*
+ * Copyright 2014 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkBitmap.h"
+#include "SkCanvas.h"
#include "SkConfig8888.h"
#include "SkColorPriv.h"
+#include "SkDither.h"
#include "SkMathPriv.h"
#include "SkUnPreMultiply.h"
@@ -115,3 +125,135 @@ bool SkSrcPixelInfo::convertPixelsTo(SkDstPixelInfo* dst, int width, int height)
}
return true;
}
+
+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;
+ }
+}
+
+bool SkPixelInfo::CopyPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRB,
+ const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRB,
+ SkColorTable* ctable) {
+ if (srcInfo.dimensions() != dstInfo.dimensions()) {
+ return false;
+ }
+
+ const int width = srcInfo.width();
+ const int height = srcInfo.height();
+
+ // Handle fancy alpha swizzling if both are ARGB32
+ if (4 == srcInfo.bytesPerPixel() && 4 == dstInfo.bytesPerPixel()) {
+ SkDstPixelInfo dstPI;
+ dstPI.fColorType = dstInfo.colorType();
+ dstPI.fAlphaType = dstInfo.alphaType();
+ dstPI.fPixels = dstPixels;
+ dstPI.fRowBytes = dstRB;
+
+ SkSrcPixelInfo srcPI;
+ srcPI.fColorType = srcInfo.colorType();
+ srcPI.fAlphaType = srcInfo.alphaType();
+ srcPI.fPixels = srcPixels;
+ srcPI.fRowBytes = srcRB;
+
+ return srcPI.convertPixelsTo(&dstPI, width, height);
+ }
+
+ // If they agree on colorType and the alphaTypes are compatible, then we just memcpy.
+ // Note: we've already taken care of 32bit colortypes above.
+ if (srcInfo.colorType() == dstInfo.colorType()) {
+ switch (srcInfo.colorType()) {
+ case kRGB_565_SkColorType:
+ case kAlpha_8_SkColorType:
+ break;
+ case kIndex_8_SkColorType:
+ case kARGB_4444_SkColorType:
+ if (srcInfo.alphaType() != dstInfo.alphaType()) {
+ return false;
+ }
+ break;
+ default:
+ return false;
+ }
+ rect_memcpy(dstPixels, dstRB, srcPixels, srcRB, width * srcInfo.bytesPerPixel(), height);
+ return true;
+ }
+
+ /*
+ * Begin section where we try to change colorTypes along the way. Not all combinations
+ * are supported.
+ */
+
+ // Can no longer draw directly into 4444, but we can manually whack it for a few combinations
+ if (kARGB_4444_SkColorType == dstInfo.colorType() &&
+ (kN32_SkColorType == srcInfo.colorType() || kIndex_8_SkColorType == srcInfo.colorType())) {
+ if (srcInfo.alphaType() == kUnpremul_SkAlphaType) {
+ // Our method for converting to 4444 assumes premultiplied.
+ return false;
+ }
+
+ const SkPMColor* table = NULL;
+ if (kIndex_8_SkColorType == srcInfo.colorType()) {
+ if (NULL == ctable) {
+ return false;
+ }
+ table = ctable->lockColors();
+ }
+
+ for (int y = 0; y < height; ++y) {
+ DITHER_4444_SCAN(y);
+ SkPMColor16* SK_RESTRICT dstRow = (SkPMColor16*)dstPixels;
+ if (table) {
+ const uint8_t* SK_RESTRICT srcRow = (const uint8_t*)srcPixels;
+ for (int x = 0; x < width; ++x) {
+ dstRow[x] = SkDitherARGB32To4444(table[srcRow[x]], DITHER_VALUE(x));
+ }
+ } else {
+ const SkPMColor* SK_RESTRICT srcRow = (const SkPMColor*)srcPixels;
+ for (int x = 0; x < width; ++x) {
+ dstRow[x] = SkDitherARGB32To4444(srcRow[x], DITHER_VALUE(x));
+ }
+ }
+ dstPixels = (char*)dstPixels + dstRB;
+ srcPixels = (const char*)srcPixels + srcRB;
+ }
+
+ if (table) {
+ ctable->unlockColors();
+ }
+ return true;
+ }
+
+ if (dstInfo.alphaType() == kUnpremul_SkAlphaType) {
+ // We do not support drawing to unpremultiplied bitmaps.
+ return false;
+ }
+
+ // Final fall-back, draw with a canvas
+ //
+ // Always clear the dest in case one of the blitters accesses it
+ // TODO: switch the allocation of tmpDst to call sk_calloc_throw
+ {
+ SkBitmap bm;
+ if (!bm.installPixels(srcInfo, const_cast<void*>(srcPixels), srcRB, ctable, NULL, NULL)) {
+ return false;
+ }
+ SkAutoTUnref<SkCanvas> canvas(SkCanvas::NewRasterDirect(dstInfo, dstPixels, dstRB));
+ if (NULL == canvas.get()) {
+ return false;
+ }
+
+ SkPaint paint;
+ paint.setDither(true);
+
+ canvas->clear(0);
+ canvas->drawBitmap(bm, 0, 0, &paint);
+ return true;
+ }
+}
+
diff --git a/src/core/SkConfig8888.h b/src/core/SkConfig8888.h
index 97a3433ad2..da0cbc6688 100644
--- a/src/core/SkConfig8888.h
+++ b/src/core/SkConfig8888.h
@@ -14,6 +14,10 @@ struct SkPixelInfo {
SkColorType fColorType;
SkAlphaType fAlphaType;
size_t fRowBytes;
+
+ static bool CopyPixels(const SkImageInfo& dstInfo, void* dstPixels, size_t dstRowBytes,
+ const SkImageInfo& srcInfo, const void* srcPixels, size_t srcRowBytes,
+ SkColorTable* srcCTable = NULL);
};
struct SkDstPixelInfo : SkPixelInfo {
diff --git a/tests/BitmapCopyTest.cpp b/tests/BitmapCopyTest.cpp
index 40cfbe0d54..4a49a6b487 100644
--- a/tests/BitmapCopyTest.cpp
+++ b/tests/BitmapCopyTest.cpp
@@ -185,7 +185,7 @@ static void writeCoordPixels(SkBitmap& bm, const Coordinates& coords) {
static const Pair gPairs[] = {
{ kUnknown_SkColorType, "000000" },
{ kAlpha_8_SkColorType, "010101" },
- { kIndex_8_SkColorType, "011101" },
+ { kIndex_8_SkColorType, "011111" },
{ kRGB_565_SkColorType, "010101" },
{ kARGB_4444_SkColorType, "010111" },
{ kN32_SkColorType, "010111" },
@@ -542,3 +542,96 @@ DEF_TEST(BitmapCopy, reporter) {
} // for (size_t copyCase ...
}
}
+
+#include "SkColorPriv.h"
+#include "SkUtils.h"
+
+/**
+ * Construct 4x4 pixels where we can look at a color and determine where it should be in the grid.
+ * alpha = 0xFF, blue = 0x80, red = x, green = y
+ */
+static void fill_4x4_pixels(SkPMColor colors[16]) {
+ for (int y = 0; y < 4; ++y) {
+ for (int x = 0; x < 4; ++x) {
+ colors[y*4+x] = SkPackARGB32(0xFF, x, y, 0x80);
+ }
+ }
+}
+
+static bool check_4x4_pixel(SkPMColor color, unsigned x, unsigned y) {
+ SkASSERT(x < 4 && y < 4);
+ return 0xFF == SkGetPackedA32(color) &&
+ x == SkGetPackedR32(color) &&
+ y == SkGetPackedG32(color) &&
+ 0x80 == SkGetPackedB32(color);
+}
+
+/**
+ * Fill with all zeros, which will never match any value from fill_4x4_pixels
+ */
+static void clear_4x4_pixels(SkPMColor colors[16]) {
+ sk_memset32(colors, 0, 16);
+}
+
+// Much of readPixels is exercised by copyTo testing, since readPixels is the backend for that
+// method. Here we explicitly test subset copies.
+//
+DEF_TEST(BitmapReadPixels, reporter) {
+ const int W = 4;
+ const int H = 4;
+ const size_t rowBytes = W * sizeof(SkPMColor);
+ const SkImageInfo srcInfo = SkImageInfo::MakeN32Premul(W, H);
+ SkPMColor srcPixels[16];
+ fill_4x4_pixels(srcPixels);
+ SkBitmap srcBM;
+ srcBM.installPixels(srcInfo, srcPixels, rowBytes);
+
+ SkImageInfo dstInfo = SkImageInfo::MakeN32Premul(W, H);
+ SkPMColor dstPixels[16];
+
+ const struct {
+ bool fExpectedSuccess;
+ SkIPoint fRequestedSrcLoc;
+ SkISize fRequestedDstSize;
+ // If fExpectedSuccess, check these, otherwise ignore
+ SkIPoint fExpectedDstLoc;
+ SkIRect fExpectedSrcR;
+ } gRec[] = {
+ { true, { 0, 0 }, { 4, 4 }, { 0, 0 }, { 0, 0, 4, 4 } },
+ { true, { 1, 1 }, { 2, 2 }, { 0, 0 }, { 1, 1, 3, 3 } },
+ { true, { 2, 2 }, { 4, 4 }, { 0, 0 }, { 2, 2, 4, 4 } },
+ { true, {-1,-1 }, { 2, 2 }, { 1, 1 }, { 0, 0, 1, 1 } },
+ { false, {-1,-1 }, { 1, 1 }, { 0, 0 }, { 0, 0, 0, 0 } },
+ };
+
+ for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); ++i) {
+ clear_4x4_pixels(dstPixels);
+
+ dstInfo.fWidth = gRec[i].fRequestedDstSize.width();
+ dstInfo.fHeight = gRec[i].fRequestedDstSize.height();
+ bool success = srcBM.readPixels(dstInfo, dstPixels, rowBytes,
+ gRec[i].fRequestedSrcLoc.x(), gRec[i].fRequestedSrcLoc.y());
+
+ REPORTER_ASSERT(reporter, gRec[i].fExpectedSuccess == success);
+ if (success) {
+ const SkIRect srcR = gRec[i].fExpectedSrcR;
+ const int dstX = gRec[i].fExpectedDstLoc.x();
+ const int dstY = gRec[i].fExpectedDstLoc.y();
+ // Walk the dst pixels, and check if we got what we expected
+ for (int y = 0; y < H; ++y) {
+ for (int x = 0; x < W; ++x) {
+ SkPMColor dstC = dstPixels[y*4+x];
+ // get into src coordinates
+ int sx = x - dstX + srcR.x();
+ int sy = y - dstY + srcR.y();
+ if (srcR.contains(sx, sy)) {
+ REPORTER_ASSERT(reporter, check_4x4_pixel(dstC, sx, sy));
+ } else {
+ REPORTER_ASSERT(reporter, 0 == dstC);
+ }
+ }
+ }
+ }
+ }
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-12 23:41:34 +0000