respect preferred config when png is index-based

git-svn-id: http://skia.googlecode.com/svn/trunk@261 2bbb7eff-a529-9590-31e7-b0007b416f81

1 files changed, 67 insertions, 0 deletions

diff --git a/samplecode/SampleDecode.cpp b/samplecode/SampleDecode.cpp
new file mode 100644
index 0000000000..9a8026700c
--- /dev/null
+++ b/samplecode/SampleDecode.cpp
@@ -0,0 +1,67 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkImageDecoder.h"
+#include "SkStream.h"
+
+static const struct {
+    SkBitmap::Config    fPrefConfig;
+    bool                fDither;
+} gRec[] = {
+    { SkBitmap::kIndex8_Config,     false },
+    { SkBitmap::kARGB_8888_Config,  false },
+    { SkBitmap::kARGB_4444_Config,  false },
+    { SkBitmap::kARGB_4444_Config,  true },
+    { SkBitmap::kRGB_565_Config,    false },
+    { SkBitmap::kRGB_565_Config,    true },
+};
+
+class DecodeView : public SkView {
+public:
+    SkBitmap fBitmap[SK_ARRAY_COUNT(gRec)];
+
+	DecodeView() {
+        SkFILEStream stream("/skimages/index.png");
+        SkImageDecoder* codec = SkImageDecoder::Factory(&stream);
+        for (size_t i = 0; i < SK_ARRAY_COUNT(gRec); i++) {
+            stream.rewind();
+            codec->setDitherImage(gRec[i].fDither);
+            codec->decode(&stream, &fBitmap[i], gRec[i].fPrefConfig,
+                          SkImageDecoder::kDecodePixels_Mode);
+        }
+    }
+    
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "ImageDecoder");
+            return true;
+        }
+        return this->INHERITED::onQuery(evt);
+    }
+    
+    void drawBG(SkCanvas* canvas) {
+        canvas->drawColor(0xFFDDDDDD);
+//        canvas->drawColor(SK_ColorWHITE);
+    }
+    
+    virtual void onDraw(SkCanvas* canvas) {
+        this->drawBG(canvas);
+        
+        canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
+        
+        for (size_t i = 0; i < SK_ARRAY_COUNT(fBitmap); i++) {
+            canvas->drawBitmap(fBitmap[i], 0, 0);
+            canvas->translate(SkIntToScalar(fBitmap[i].width()), 0);
+        }
+    }
+private:
+    typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new DecodeView; }
+static SkViewRegister reg(MyFactory);
+