Add SkImageGenerator Interface
- Add SkDiscardablePixelRef class that uses SkDiscardableMemory and
a SkImageGenerator.
- Add SkDecodingImageGenerator class as an example of a
SkImageGenerator.
- Add DecodingImageGenerator unit test.
- Add SkBasicDiscardableMemory implmentation for unit tests only.
R=reed@google.com, scroggo@google.com
Review URL: https://codereview.chromium.org/74793011
git-svn-id: http://skia.googlecode.com/svn/trunk@12341 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/images/SkDecodingImageGenerator.cpp b/src/images/SkDecodingImageGenerator.cpp
new file mode 100644
index 0000000..65fa6fd
--- /dev/null
+++ b/src/images/SkDecodingImageGenerator.cpp
@@ -0,0 +1,52 @@
+/*
+ * Copyright 2013 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkDecodingImageGenerator.h"
+
+#include "SkBitmapFactory.h"
+#include "SkData.h"
+#include "SkDiscardablePixelRef.h"
+#include "SkImageDecoder.h"
+
+SkDecodingImageGenerator::SkDecodingImageGenerator(SkData* data)
+ : fData(data) {
+ SkASSERT(fData != NULL);
+ fData->ref();
+}
+
+SkDecodingImageGenerator::~SkDecodingImageGenerator() {
+ fData->unref();
+}
+
+SkData* SkDecodingImageGenerator::refEncodedData() {
+ fData->ref();
+ return fData;
+}
+
+bool SkDecodingImageGenerator::getInfo(SkImageInfo* info) {
+ SkASSERT(info != NULL);
+ return SkImageDecoder::DecodeMemoryToTarget(fData->data(),
+ fData->size(),
+ info, NULL);
+}
+
+bool SkDecodingImageGenerator::getPixels(const SkImageInfo& info,
+ void* pixels,
+ size_t rowBytes) {
+ SkASSERT(pixels != NULL);
+ SkBitmapFactory::Target target = {pixels, rowBytes};
+ SkImageInfo tmpInfo = info;
+ return SkImageDecoder::DecodeMemoryToTarget(fData->data(),
+ fData->size(),
+ &tmpInfo, &target);
+}
+bool SkDecodingImageGenerator::Install(SkData* data, SkBitmap* dst) {
+ SkASSERT(data != NULL);
+ SkASSERT(dst != NULL);
+ SkImageGenerator* gen(SkNEW_ARGS(SkDecodingImageGenerator, (data)));
+ return SkDiscardablePixelRef::Install(gen, dst);
+}