Add GM to test bitmap shaders with basic geometry and bitmap masks.
R=reed@google.com, bsalomon@google.com, rmistry@google.com
Author: djsollen@google.com
Review URL: https://codereview.chromium.org/98433004
git-svn-id: http://skia.googlecode.com/svn/trunk@12543 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/bitmapshader.cpp b/gm/bitmapshader.cpp
new file mode 100644
index 0000000..4ec2348
--- /dev/null
+++ b/gm/bitmapshader.cpp
@@ -0,0 +1,103 @@
+
+/*
+ * 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 "gm.h"
+
+#include "SkBitmap.h"
+#include "SkPaint.h"
+#include "SkShader.h"
+
+namespace skiagm {
+
+static void draw_bm(SkBitmap* bm) {
+ SkPaint bluePaint;
+ bluePaint.setColor(SK_ColorBLUE);
+
+ bm->setConfig(SkBitmap::kARGB_8888_Config, 20, 20);
+ bm->allocPixels();
+ bm->eraseColor(SK_ColorRED);
+
+ SkCanvas canvas(*bm);
+ canvas.drawCircle(10, 10, 5, bluePaint);
+}
+
+static void draw_mask(SkBitmap* bm) {
+ SkPaint circlePaint;
+ circlePaint.setColor(SK_ColorBLACK);
+
+ bm->setConfig(SkBitmap::kA8_Config, 20, 20);
+ bm->allocPixels();
+ bm->eraseColor(SK_ColorTRANSPARENT);
+
+ SkCanvas canvas(*bm);
+ canvas.drawCircle(10, 10, 10, circlePaint);
+}
+
+class BitmapShaderGM : public GM {
+public:
+
+ BitmapShaderGM() {
+ this->setBGColor(SK_ColorGRAY);
+ draw_bm(&fBitmap);
+ draw_mask(&fMask);
+ }
+
+protected:
+ virtual SkString onShortName() {
+ return SkString("bitmapshaders");
+ }
+
+ virtual SkISize onISize() {
+ return make_isize(75, 100);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) {
+ SkShader* shader = SkShader::CreateBitmapShader(fBitmap,
+ SkShader::kClamp_TileMode,
+ SkShader::kClamp_TileMode);
+ SkPaint paint;
+ paint.setShader(shader);
+ // release the shader ref as the paint now holds a reference
+ shader->unref();
+
+ // draw the shader with a bitmap mask
+ canvas->drawBitmap(fMask, 0, 0, &paint);
+ canvas->drawBitmap(fMask, 30, 0, &paint);
+
+ canvas->translate(0, 25);
+
+ // draw the shader with standard geometry
+ canvas->drawCircle(10, 10, 10, paint);
+ canvas->drawCircle(40, 10, 10, paint); // no blue circle expected
+
+ canvas->translate(0, 25);
+
+ shader = SkShader::CreateBitmapShader(fMask,
+ SkShader::kRepeat_TileMode,
+ SkShader::kRepeat_TileMode);
+ paint.setShader(shader);
+ paint.setColor(SK_ColorRED);
+ shader->unref();
+
+ // draw the mask using the shader and a color
+ canvas->drawRect(SkRect::MakeXYWH(0, 0, 20, 20), paint);
+ canvas->drawRect(SkRect::MakeXYWH(30, 0, 20, 20), paint);
+ }
+
+private:
+ SkBitmap fBitmap;
+ SkBitmap fMask;
+
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+static GM* MyFactory(void*) { return new BitmapShaderGM; }
+static GMRegistry reg(MyFactory);
+
+}