add gm::vertices
git-svn-id: http://skia.googlecode.com/svn/trunk@12834 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/gm/vertices.cpp b/gm/vertices.cpp
new file mode 100644
index 0000000..3323747
--- /dev/null
+++ b/gm/vertices.cpp
@@ -0,0 +1,110 @@
+/*
+ * 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 "SkCanvas.h"
+#include "SkGradientShader.h"
+
+static SkShader* make_shader(int w, int h) {
+ const SkColor colors[] = { SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE };
+ const SkPoint center = { SkScalarHalf(w), SkScalarHalf(h) };
+ const SkScalar radius = w / 2;
+
+ return SkGradientShader::CreateRadial(center, radius, colors, NULL,
+ SK_ARRAY_COUNT(colors),
+ SkShader::kMirror_TileMode);
+}
+
+class VerticesGM : public skiagm::GM {
+ SkPoint fPts[9];
+ SkPoint fTexs[9];
+ SkColor fColors[9];
+ SkShader* fShader;
+
+public:
+ VerticesGM() : fShader(NULL) {
+ }
+
+ virtual ~VerticesGM() {
+ SkSafeUnref(fShader);
+ }
+
+protected:
+ virtual void onOnceBeforeDraw() SK_OVERRIDE {
+ fPts[0].set(0, 0); fPts[1].set(100, 10); fPts[2].set(200, 0);
+ fPts[3].set(10, 100); fPts[4].set(100, 100); fPts[5].set(190, 100);
+ fPts[6].set(0, 200); fPts[7].set(100, 190); fPts[8].set(200, 200);
+
+ int w = 200;
+ int h = 200;
+
+ fTexs[0].set(0, 0); fTexs[1].set(w/2, 0); fTexs[2].set(w, 0);
+ fTexs[3].set(0, h/2); fTexs[4].set(w/2, h/2); fTexs[5].set(w, h/2);
+ fTexs[6].set(0, h); fTexs[7].set(w/2, h); fTexs[8].set(w, h);
+
+ fShader = make_shader(w, h);
+
+ SkRandom rand;
+ for (size_t i = 0; i < SK_ARRAY_COUNT(fColors); ++i) {
+ fColors[i] = rand.nextU() | 0xFF202020;
+ }
+ }
+
+ virtual SkString onShortName() SK_OVERRIDE {
+ return SkString("vertices");
+ }
+
+ virtual SkISize onISize() SK_OVERRIDE {
+ return SkISize::Make(800, 800);
+ }
+
+ virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
+ static const uint16_t fan[] = {
+ 4,
+ 0, 1, 2, 5, 8, 7, 6, 3, 0
+ };
+
+ const struct {
+ const SkColor* fColors;
+ const SkPoint* fTexs;
+ } rec[] = {
+ { fColors, NULL },
+ { NULL, fTexs },
+ { fColors, fTexs },
+ };
+
+ const SkXfermode::Mode modes[] = {
+ SkXfermode::kSrc_Mode,
+ SkXfermode::kDst_Mode,
+ SkXfermode::kModulate_Mode,
+ };
+
+ SkPaint paint;
+ paint.setShader(fShader);
+
+ canvas->translate(20, 20);
+ for (size_t j = 0; j < SK_ARRAY_COUNT(modes); ++j) {
+ SkXfermode* xfer = SkXfermode::Create(modes[j]);
+ canvas->save();
+ for (size_t i = 0; i < SK_ARRAY_COUNT(rec); ++i) {
+ canvas->drawVertices(SkCanvas::kTriangleFan_VertexMode,
+ SK_ARRAY_COUNT(fPts), fPts,
+ rec[i].fTexs, rec[i].fColors,
+ xfer, fan, SK_ARRAY_COUNT(fan), paint);
+ canvas->translate(250, 0);
+ }
+ canvas->restore();
+ canvas->translate(0, 250);
+ xfer->unref();
+ }
+ }
+
+private:
+ typedef skiagm::GM INHERITED;
+};
+
+DEF_GM( return SkNEW(VerticesGM); )