auto import from //depot/cupcake/@135843

1 files changed, 253 insertions, 0 deletions

diff --git a/samplecode/SampleEncode.cpp b/samplecode/SampleEncode.cpp
new file mode 100644
index 0000000..e4197bf
--- /dev/null
+++ b/samplecode/SampleEncode.cpp
@@ -0,0 +1,253 @@
+#include "SampleCode.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkGraphics.h"
+#include "SkImageEncoder.h"
+#include "SkPath.h"
+#include "SkPorterDuff.h"
+#include "SkRegion.h"
+#include "SkShader.h"
+#include "SkUtils.h"
+#include "SkXfermode.h"
+#include "SkColorPriv.h"
+#include "SkColorFilter.h"
+#include "SkTime.h"
+#include "SkTypeface.h"
+
+#include "SkImageRef.h"
+#include "SkStream.h"
+
+static void make_image(SkBitmap* bm, SkBitmap::Config config, int configIndex) {
+    const int   width = 98;
+    const int   height = 100;
+    SkBitmap    device;
+    
+    device.setConfig(SkBitmap::kARGB_8888_Config, width, height);
+    device.allocPixels();
+
+    SkCanvas    canvas(device);
+    SkPaint     paint;
+    
+    paint.setAntiAlias(true);
+    canvas.drawColor(SK_ColorRED);
+    paint.setColor(SK_ColorBLUE);
+    canvas.drawCircle(SkIntToScalar(width)/2, SkIntToScalar(height)/2,
+                      SkIntToScalar(width)/2, paint);
+
+    bm->setConfig(config, width, height);
+    switch (config) {
+        case SkBitmap::kARGB_8888_Config:
+            bm->swap(device);
+            break;
+        case SkBitmap::kRGB_565_Config: {
+            bm->allocPixels();
+            for (int y = 0; y < height; y++) {
+                for (int x = 0; x < width; x++) {
+                    *bm->getAddr16(x, y) = SkPixel32ToPixel16(*device.getAddr32(x, y));
+                }
+            }
+            break;
+        }
+        case SkBitmap::kIndex8_Config: {
+            SkPMColor colors[256];
+            for (int i = 0; i < 256; i++) {
+                if (configIndex & 1) {
+                    colors[i] = SkPackARGB32(255-i, 0, 0, 255-i);
+                } else {
+                    colors[i] = SkPackARGB32(0xFF, i, 0, 255-i);
+                }
+            }
+            SkColorTable* ctable = new SkColorTable(colors, 256);
+            bm->allocPixels(ctable);
+            ctable->unref();
+            
+            for (int y = 0; y < height; y++) {
+                for (int x = 0; x < width; x++) {
+                    *bm->getAddr8(x, y) = SkGetPackedR32(*device.getAddr32(x, y));
+                }
+            }
+            break;
+        }
+        default:
+            break;
+    }
+}
+
+// configs to build the original bitmap in. Can be at most these 3
+static const SkBitmap::Config gConfigs[] = {
+    SkBitmap::kARGB_8888_Config,
+    SkBitmap::kRGB_565_Config,
+    SkBitmap::kIndex8_Config,   // opaque
+    SkBitmap::kIndex8_Config    // alpha
+};
+
+static const char* const gConfigLabels[] = {
+    "8888", "565", "Index8",  "Index8 alpha"
+};
+
+// types to encode into. Can be at most these 3. Must match up with gExt[]
+static const SkImageEncoder::Type gTypes[] = {
+    SkImageEncoder::kJPEG_Type,
+    SkImageEncoder::kPNG_Type
+};
+
+// must match up with gTypes[]
+static const char* const gExt[] = {
+    ".jpg", ".png"
+};
+
+static const char* gPath = "/encoded/";
+
+static void make_name(SkString* name, int config, int ext) {
+    name->set(gPath);
+    name->append(gConfigLabels[config]);
+    name->append(gExt[ext]);
+}
+
+#include <sys/stat.h>
+
+class EncodeView : public SkView {
+public:
+    SkBitmap*   fBitmaps;
+    size_t      fBitmapCount;
+
+	EncodeView() {
+    #if 1
+        (void)mkdir(gPath, S_IRWXU | S_IRWXG | S_IRWXO);
+        
+        fBitmapCount = SK_ARRAY_COUNT(gConfigs);
+        fBitmaps = new SkBitmap[fBitmapCount];
+        for (size_t i = 0; i < fBitmapCount; i++) {
+            make_image(&fBitmaps[i], gConfigs[i], i);
+            
+            for (size_t j = 0; j < SK_ARRAY_COUNT(gExt); j++) {
+                SkString path;
+                make_name(&path, i, j);
+                
+                // remove any previous run of this file
+                remove(path.c_str());
+                
+                SkImageEncoder* codec = SkImageEncoder::Create(gTypes[j]);
+                if (!codec->encodeFile(path.c_str(), fBitmaps[i], 100)) {
+                    SkDebugf("------ failed to encode %s\n", path.c_str());
+                    remove(path.c_str());   // remove any partial file
+                }
+                delete codec;
+            }
+        }
+    #else
+        fBitmaps = NULL;
+        fBitmapCount = 0;
+    #endif
+    }
+    
+    virtual ~EncodeView() {
+        delete[] fBitmaps;
+    }
+    
+protected:
+    // overrides from SkEventSink
+    virtual bool onQuery(SkEvent* evt) {
+        if (SampleCode::TitleQ(*evt)) {
+            SampleCode::TitleR(evt, "ImageEncoder");
+            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);
+        
+        if (fBitmapCount == 0) {
+            return;
+        }
+        
+        SkPaint paint;
+        if (false) {
+//            SkColor colors[] = { 0xFE000000, SK_ColorWHITE };
+            SkColor colors[] = { SK_ColorRED, SK_ColorBLUE };
+            SkShader* shader = SkGradientShader::CreateSweep(SkIntToScalar(50), SkIntToScalar(50),
+                                                             colors, NULL, 2);
+            paint.setShader(shader)->unref();
+
+            SkRect r;
+            r.set(0, 0, SkIntToScalar(100), SkIntToScalar(100));
+            canvas->drawRect(r, paint);
+            
+            canvas->translate(SkIntToScalar(200), SkIntToScalar(200));
+            paint.setAntiAlias(true);
+            paint.setStyle(SkPaint::kStroke_Style);
+            paint.setStrokeWidth(SkIntToScalar(10));
+            canvas->drawOval(r, paint);
+            return;
+        }
+        
+        paint.setAntiAlias(true);
+        paint.setTextAlign(SkPaint::kCenter_Align);
+        
+        canvas->translate(SkIntToScalar(10), SkIntToScalar(20));
+        
+        SkScalar x = 0, y = 0, maxX = 0;
+        const int SPACER = 10;
+        
+        for (size_t i = 0; i < fBitmapCount; i++) {
+            canvas->drawText(gConfigLabels[i], strlen(gConfigLabels[i]),
+                             x + SkIntToScalar(fBitmaps[i].width()) / 2, 0,
+                             paint);
+            y = paint.getTextSize();
+
+            canvas->drawBitmap(fBitmaps[i], x, y);
+            
+            SkScalar yy = y;
+            for (size_t j = 0; j < SK_ARRAY_COUNT(gExt); j++) {
+                yy += SkIntToScalar(fBitmaps[i].height() + 10);
+
+                SkBitmap bm;
+                SkString name;
+                
+                make_name(&name, i, j);
+                
+                SkImageDecoder::DecodeFile(name.c_str(), &bm);
+                canvas->drawBitmap(bm, x, yy);
+            }
+            
+            x += SkIntToScalar(fBitmaps[i].width() + SPACER);
+            if (x > maxX) {
+                maxX = x;
+            }
+        }
+
+        y = (paint.getTextSize() + SkIntToScalar(fBitmaps[0].height())) * 3 / 2;
+        x = maxX + SkIntToScalar(10);
+        paint.setTextAlign(SkPaint::kLeft_Align);
+
+        for (size_t j = 0; j < SK_ARRAY_COUNT(gExt); j++) {
+            canvas->drawText(gExt[j], strlen(gExt[j]), x, y, paint);
+            y += SkIntToScalar(fBitmaps[0].height() + SPACER);
+        }
+    }
+    
+    virtual SkView::Click* onFindClickHandler(SkScalar x, SkScalar y) {
+        this->inval(NULL);
+        return this->INHERITED::onFindClickHandler(x, y);
+    }
+    
+    virtual bool onClick(Click* click) {
+        return this->INHERITED::onClick(click);
+    }
+    
+private:
+    typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new EncodeView; }
+static SkViewRegister reg(MyFactory);
+