special case 1x1 bitmaps when drawn as a shader (treat as a solid color)
git-svn-id: http://skia.googlecode.com/svn/trunk@336 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/samplecode/SampleTinyBitmap.cpp b/samplecode/SampleTinyBitmap.cpp
new file mode 100644
index 0000000..1563c7a
--- /dev/null
+++ b/samplecode/SampleTinyBitmap.cpp
@@ -0,0 +1,81 @@
+#include "SampleCode.h"
+#include "SkColorPriv.h"
+#include "SkShader.h"
+#include "SkView.h"
+#include "SkCanvas.h"
+#include "SkUtils.h"
+
+static SkBitmap make_bitmap() {
+ SkBitmap bm;
+ const int N = 1;
+ SkColorTable* ctable = new SkColorTable(N);
+
+ SkPMColor* c = ctable->lockColors();
+ for (int i = 0; i < N; i++) {
+ c[i] = SkPackARGB32(0x80, 0x80, 0, 0);
+ }
+ ctable->unlockColors(true);
+ bm.setConfig(SkBitmap::kIndex8_Config, 1, 1);
+ bm.allocPixels(ctable);
+ ctable->unref();
+
+ bm.lockPixels();
+ for (int y = 0; y < bm.height(); y++) {
+ uint8_t* p = bm.getAddr8(0, y);
+ for (int x = 0; x < bm.width(); x++) {
+ p[x] = 0;
+ }
+ }
+ bm.unlockPixels();
+ return bm;
+}
+
+class TinyBitmapView : public SkView {
+ SkBitmap fBM;
+public:
+ TinyBitmapView() {
+ fBM = make_bitmap();
+ }
+
+protected:
+ // overrides from SkEventSink
+ virtual bool onQuery(SkEvent* evt) {
+ if (SampleCode::TitleQ(*evt)) {
+ SampleCode::TitleR(evt, "TinyBitmap");
+ return true;
+ }
+ return this->INHERITED::onQuery(evt);
+ }
+
+ void drawBG(SkCanvas* canvas) {
+ canvas->drawColor(0xFFDDDDDD);
+ }
+
+ static void setBitmapOpaque(SkBitmap* bm, bool isOpaque) {
+ SkAutoLockPixels alp(*bm); // needed for ctable
+ bm->setIsOpaque(isOpaque);
+ SkColorTable* ctable = bm->getColorTable();
+ if (ctable) {
+ ctable->setIsOpaque(isOpaque);
+ }
+ }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ drawBG(canvas);
+
+ SkShader* s = SkShader::CreateBitmapShader(fBM, SkShader::kRepeat_TileMode,
+ SkShader::kMirror_TileMode);
+ SkPaint paint;
+ paint.setShader(s)->unref();
+ canvas->drawPaint(paint);
+ }
+
+private:
+ typedef SkView INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static SkView* MyFactory() { return new TinyBitmapView; }
+static SkViewRegister reg(MyFactory);
+