[GPU] tile when large bitmap pased drawBitmap and only a small fraction is used
Review URL: http://codereview.appspot.com/5450048/
git-svn-id: http://skia.googlecode.com/svn/trunk@2760 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/drawbitmaprect.cpp b/gm/drawbitmaprect.cpp
new file mode 100644
index 0000000..1f8210b
--- /dev/null
+++ b/gm/drawbitmaprect.cpp
@@ -0,0 +1,155 @@
+
+/*
+ * Copyright 2011 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+#include "gm.h"
+#include "SkShader.h"
+#include "SkColorPriv.h"
+
+// effects
+#include "SkGradientShader.h"
+
+
+namespace skiagm {
+
+static void makebm(SkBitmap* bm, SkBitmap::Config config, int w, int h) {
+ bm->setConfig(config, w, h);
+ bm->allocPixels();
+ bm->eraseColor(0);
+
+ SkCanvas canvas(*bm);
+
+ SkScalar wScalar = SkIntToScalar(w);
+ SkScalar hScalar = SkIntToScalar(h);
+
+ SkPoint pt = { wScalar / 2, hScalar / 2 };
+
+ SkScalar radius = 4 * SkMaxScalar(wScalar, hScalar);
+
+ SkColor colors[] = { SK_ColorRED, SK_ColorYELLOW,
+ SK_ColorGREEN, SK_ColorMAGENTA,
+ SK_ColorBLUE, SK_ColorCYAN,
+ SK_ColorRED};
+
+ SkScalar pos[] = {0,
+ SK_Scalar1 / 6,
+ 2 * SK_Scalar1 / 6,
+ 3 * SK_Scalar1 / 6,
+ 4 * SK_Scalar1 / 6,
+ 5 * SK_Scalar1 / 6,
+ SK_Scalar1};
+
+ SkPaint paint;
+ paint.setShader(SkGradientShader::CreateRadial(
+ pt, radius,
+ colors, pos,
+ SK_ARRAY_COUNT(colors),
+ SkShader::kRepeat_TileMode))->unref();
+ SkRect rect = SkRect::MakeWH(wScalar, hScalar);
+ SkMatrix mat = SkMatrix::I();
+ for (int i = 0; i < 4; ++i) {
+ paint.getShader()->setLocalMatrix(mat);
+ canvas.drawRect(rect, paint);
+ rect.inset(wScalar / 8, hScalar / 8);
+ mat.postScale(SK_Scalar1 / 4, SK_Scalar1 / 4);
+ }
+}
+
+static const int gSize = 1024;
+
+class DrawBitmapRectGM : public GM {
+public:
+ DrawBitmapRectGM() {
+ }
+
+ SkBitmap fLargeBitmap;
+
+protected:
+ SkString onShortName() {
+ return SkString("drawbitmaprect");
+ }
+
+ SkISize onISize() { return make_isize(gSize, gSize); }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ static const int kBmpSize = 2048;
+ if (fLargeBitmap.isNull()) {
+ makebm(&fLargeBitmap,
+ SkBitmap::kARGB_8888_Config,
+ kBmpSize, kBmpSize);
+ }
+ SkRect dstRect = { 0, 0, 64, 64};
+ static const int kMaxSrcRectSize = 1 << (SkNextLog2(kBmpSize) + 2);
+
+ static const int kPadX = 30;
+ static const int kPadY = 40;
+ SkPaint paint;
+ paint.setAlpha(0x20);
+ canvas->drawBitmapRect(fLargeBitmap, NULL,
+ SkRect::MakeWH(gSize * SK_Scalar1,
+ gSize * SK_Scalar1),
+ &paint);
+ canvas->translate(SK_Scalar1 * kPadX / 2,
+ SK_Scalar1 * kPadY / 2);
+ SkPaint blackPaint;
+ SkScalar titleHeight = SK_Scalar1 * 24;
+ blackPaint.setColor(SK_ColorBLACK);
+ blackPaint.setTextSize(titleHeight);
+ blackPaint.setAntiAlias(true);
+ SkString title;
+ title.printf("Bitmap size: %d x %d", kBmpSize, kBmpSize);
+ canvas->drawText(title.c_str(), title.size(), 0,
+ titleHeight, blackPaint);
+
+ canvas->translate(0, SK_Scalar1 * kPadY / 2 + titleHeight);
+ int rowCount = 0;
+ canvas->save();
+ for (int w = 1; w <= kMaxSrcRectSize; w *= 4) {
+ for (int h = 1; h <= kMaxSrcRectSize; h *= 4) {
+
+ SkIRect srcRect = SkIRect::MakeXYWH((kBmpSize - w) / 2,
+ (kBmpSize - h) / 2,
+ w, h);
+ canvas->drawBitmapRect(fLargeBitmap, &srcRect, dstRect);
+
+ SkString label;
+ label.appendf("%d x %d", w, h);
+ blackPaint.setAntiAlias(true);
+ blackPaint.setStyle(SkPaint::kFill_Style);
+ blackPaint.setTextSize(SK_Scalar1 * 10);
+ SkScalar baseline = dstRect.height() +
+ blackPaint.getTextSize() + SK_Scalar1 * 3;
+ canvas->drawText(label.c_str(), label.size(),
+ 0, baseline,
+ blackPaint);
+ blackPaint.setStyle(SkPaint::kStroke_Style);
+ blackPaint.setStrokeWidth(SK_Scalar1);
+ blackPaint.setAntiAlias(false);
+ canvas->drawRect(dstRect, blackPaint);
+
+ canvas->translate(dstRect.width() + SK_Scalar1 * kPadX, 0);
+ ++rowCount;
+ if ((dstRect.width() + kPadX) * rowCount > gSize) {
+ canvas->restore();
+ canvas->translate(0, dstRect.height() + SK_Scalar1 * kPadY);
+ canvas->save();
+ rowCount = 0;
+ }
+ }
+ }
+ }
+
+private:
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new DrawBitmapRectGM; }
+static GMRegistry reg(MyFactory);
+
+}
+