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-rw-r--r--src/codec/SkCodecImageGenerator.cpp74
-rw-r--r--src/core/SkPixmap.cpp82
-rw-r--r--src/core/SkPixmapPriv.h33
3 files changed, 180 insertions, 9 deletions
diff --git a/src/codec/SkCodecImageGenerator.cpp b/src/codec/SkCodecImageGenerator.cpp
index e6ca2122ea..e8d7d3038a 100644
--- a/src/codec/SkCodecImageGenerator.cpp
+++ b/src/codec/SkCodecImageGenerator.cpp
@@ -5,8 +5,41 @@
* found in the LICENSE file.
*/
+#include "SkAutoPixmapStorage.h"
#include "SkCodecImageGenerator.h"
#include "SkMakeUnique.h"
+#include "SkPixmapPriv.h"
+
+#define kMirrorX SkPixmapPriv::kMirrorX
+#define kMirrorY SkPixmapPriv::kMirrorY
+#define kSwapXY SkPixmapPriv::kSwapXY
+
+const uint8_t gOrientationFlags[] = {
+ 0, // kTopLeft_Origin
+ kMirrorX, // kTopRight_Origin
+ kMirrorX | kMirrorY, // kBottomRight_Origin
+ kMirrorY, // kBottomLeft_Origin
+ kSwapXY, // kLeftTop_Origin
+ kMirrorX | kSwapXY, // kRightTop_Origin
+ kMirrorX | kMirrorY | kSwapXY, // kRightBottom_Origin
+ kMirrorY | kSwapXY, // kLeftBottom_Origin
+};
+
+SkPixmapPriv::OrientFlags SkPixmapPriv::OriginToOrient(SkCodec::Origin o) {
+ unsigned io = static_cast<int>(o) - 1;
+ SkASSERT(io < SK_ARRAY_COUNT(gOrientationFlags));
+ return static_cast<SkPixmapPriv::OrientFlags>(gOrientationFlags[io]);
+}
+
+static bool should_swap_width_height(SkCodec::Origin o) {
+ return SkToBool(SkPixmapPriv::OriginToOrient(o) & kSwapXY);
+}
+
+static SkImageInfo swap_width_height(SkImageInfo info) {
+ return info.makeWH(info.height(), info.width());
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////
std::unique_ptr<SkImageGenerator> SkCodecImageGenerator::MakeFromEncodedCodec(sk_sp<SkData> data) {
auto codec = SkCodec::MakeFromData(data);
@@ -17,16 +50,19 @@ std::unique_ptr<SkImageGenerator> SkCodecImageGenerator::MakeFromEncodedCodec(sk
return std::unique_ptr<SkImageGenerator>(new SkCodecImageGenerator(std::move(codec), data));
}
-static SkImageInfo adjust_info(const SkImageInfo& info) {
- SkImageInfo newInfo = info;
+static SkImageInfo adjust_info(SkCodec* codec) {
+ SkImageInfo info = codec->getInfo();
if (kUnpremul_SkAlphaType == info.alphaType()) {
- newInfo = newInfo.makeAlphaType(kPremul_SkAlphaType);
+ info = info.makeAlphaType(kPremul_SkAlphaType);
}
- return newInfo;
+ if (should_swap_width_height(codec->getOrigin())) {
+ info = swap_width_height(info);
+ }
+ return info;
}
SkCodecImageGenerator::SkCodecImageGenerator(std::unique_ptr<SkCodec> codec, sk_sp<SkData> data)
- : INHERITED(adjust_info(codec->getInfo()))
+ : INHERITED(adjust_info(codec.get()))
, fCodec(std::move(codec))
, fData(std::move(data))
{}
@@ -35,13 +71,35 @@ SkData* SkCodecImageGenerator::onRefEncodedData() {
return SkRef(fData.get());
}
-bool SkCodecImageGenerator::onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
- const Options& opts) {
+bool SkCodecImageGenerator::onGetPixels(const SkImageInfo& requestInfo, void* requestPixels,
+ size_t requestRowBytes, const Options& opts) {
+ const SkCodec::Origin origin = fCodec->getOrigin();
+ const SkPixmap request(requestInfo, requestPixels, requestRowBytes);
+ const SkPixmap* codecMap = &request;
+ SkAutoPixmapStorage storage; // used if we have to post-orient the output from the codec
+
+ if (origin != SkCodec::kTopLeft_Origin) {
+ SkImageInfo info = requestInfo;
+ if (should_swap_width_height(origin)) {
+ info = swap_width_height(info);
+ }
+ // need a tmp buffer to receive the pixels, so we can post-orient them
+ if (!storage.tryAlloc(info)) {
+ return false;
+ }
+ codecMap = &storage;
+ }
+
SkCodec::Options codecOpts;
codecOpts.fPremulBehavior = opts.fBehavior;
- SkCodec::Result result = fCodec->getPixels(info, pixels, rowBytes, &codecOpts);
+ SkCodec::Result result = fCodec->getPixels(*codecMap, &codecOpts);
switch (result) {
case SkCodec::kSuccess:
+ if (codecMap != &request) {
+ return SkPixmapPriv::Orient(request, *codecMap,
+ SkPixmapPriv::OriginToOrient(origin));
+ }
+ // fall through
case SkCodec::kIncompleteInput:
case SkCodec::kErrorInInput:
return true;
diff --git a/src/core/SkPixmap.cpp b/src/core/SkPixmap.cpp
index 1cee0a9d02..7ce97d23f2 100644
--- a/src/core/SkPixmap.cpp
+++ b/src/core/SkPixmap.cpp
@@ -15,9 +15,10 @@
#include "SkMask.h"
#include "SkNx.h"
#include "SkPM4f.h"
-#include "SkPixmap.h"
+#include "SkPixmapPriv.h"
#include "SkReadPixelsRec.h"
#include "SkSurface.h"
+#include "SkTemplates.h"
#include "SkUtils.h"
/////////////////////////////////////////////////////////////////////////////////////////////////
@@ -381,3 +382,82 @@ bool SkPixmap::computeIsOpaque() const {
}
return false;
}
+
+//////////////////////////////////////////////////////////////////////////////////////////////////
+
+template <typename T, typename F>
+void apply(const SkPixmap& dst, const SkPixmap& src, unsigned flags, F getAddr) {
+ const int maxX = dst.width() - 1;
+ const int maxY = dst.height() - 1;
+ T* dstRow = (T*)dst.writable_addr();
+ for (int dy = 0; dy < dst.height(); ++dy) {
+ for (int dx = 0; dx < dst.width(); ++dx) {
+ int sx = dx;
+ int sy = dy;
+ if (flags & SkPixmapPriv::kMirrorX) {
+ sx = maxX - sx;
+ }
+ if (flags & SkPixmapPriv::kMirrorY) {
+ sy = maxY - sy;
+ }
+ if (flags & SkPixmapPriv::kSwapXY) {
+ SkTSwap<int>(sx, sy);
+ }
+ dstRow[dx] = getAddr(src, sx, sy);
+ }
+ dstRow = SkTAddOffset<T>(dstRow, dst.rowBytes());
+ }
+}
+
+static bool apply_orientation(const SkPixmap& dst, const SkPixmap& src, unsigned flags) {
+ SkASSERT(dst.colorType() == src.colorType());
+
+ switch (dst.info().bytesPerPixel()) {
+ case 1:
+ apply<uint8_t>(dst, src, flags, [](const SkPixmap& pm, int x, int y) {
+ return *pm.addr8(x, y);
+ }); break;
+ case 2:
+ apply<uint16_t>(dst, src, flags, [](const SkPixmap& pm, int x, int y) {
+ return *pm.addr16(x, y);
+ }); break;
+ case 4:
+ apply<uint32_t>(dst, src, flags, [](const SkPixmap& pm, int x, int y) {
+ return *pm.addr32(x, y);
+ }); break;
+ case 8:
+ apply<uint64_t>(dst, src, flags, [](const SkPixmap& pm, int x, int y) {
+ return *pm.addr64(x, y);
+ }); break;
+ default:
+ return false;
+ }
+ return true;
+}
+
+bool SkPixmapPriv::Orient(const SkPixmap& dst, const SkPixmap& src, OrientFlags flags) {
+ SkASSERT((flags & ~(kMirrorX | kMirrorY | kSwapXY)) == 0);
+ if (src.colorType() != dst.colorType()) {
+ return false;
+ }
+ // note: we just ignore alphaType and colorSpace for this transformation
+
+ int w = src.width();
+ int h = src.height();
+ if (flags & kSwapXY) {
+ SkTSwap(w, h);
+ }
+ if (dst.width() != w || dst.height() != h) {
+ return false;
+ }
+ if (w == 0 || h == 0) {
+ return true;
+ }
+
+ // check for aliasing to self
+ if (src.addr() == dst.addr()) {
+ return flags == 0;
+ }
+ return apply_orientation(dst, src, flags);
+}
+
diff --git a/src/core/SkPixmapPriv.h b/src/core/SkPixmapPriv.h
new file mode 100644
index 0000000000..dfc9ce2dd0
--- /dev/null
+++ b/src/core/SkPixmapPriv.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkPixmapPriv_DEFINED
+#define SkPixmapPriv_DEFINED
+
+#include "SkPixmap.h"
+#include "SkCodec.h"
+
+class SkPixmapPriv {
+public:
+ // These flag are applied in this order (swap is applied last)
+ enum OrientFlags {
+ kMirrorX = 1 << 0,
+ kMirrorY = 1 << 1,
+ kSwapXY = 1 << 2,
+ };
+
+ static OrientFlags OriginToOrient(SkCodec::Origin);
+
+ /**
+ * Copy the pixels in this pixmap into dst, applying the orientation transformations specified
+ * by the flags. If the inputs are invalid, this returns false and no copy is made.
+ */
+ static bool Orient(const SkPixmap& dst, const SkPixmap& src, OrientFlags);
+};
+
+#endif
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-23 11:34:37 +0000