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authorGravatar joshualitt <joshualitt@chromium.org>2015-04-17 09:01:05 -0700
committerGravatar Commit bot <commit-bot@chromium.org>2015-04-17 09:01:05 -0700
commit523ed6c0c1ac9029be315542258e02ba9854365c (patch)
tree963d0543b16829d90bdfc71820514faaa0d5bc7f /gm
parente5043b7ea5170a639367b67c986568907576be4b (diff)
adding new gm to rotate, translate, and scale textblobs
this is to test distance field caching and regen of texture blobs on scale. BUG=skia: Review URL: https://codereview.chromium.org/1097563002
Diffstat (limited to 'gm')
-rw-r--r--gm/textblobtransforms.cpp172
1 files changed, 172 insertions, 0 deletions
diff --git a/gm/textblobtransforms.cpp b/gm/textblobtransforms.cpp
new file mode 100644
index 0000000000..8347e9be60
--- /dev/null
+++ b/gm/textblobtransforms.cpp
@@ -0,0 +1,172 @@
+/*
+ * Copyright 2015 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 "Resources.h"
+#include "SkCanvas.h"
+#include "SkGradientShader.h"
+#include "SkStream.h"
+#include "SkTextBlob.h"
+#include "SkTypeface.h"
+
+namespace skiagm {
+class TextBlobTransforms : public GM {
+public:
+ // This gm tests that textblobs can be translated, rotated, and scaled
+ TextBlobTransforms() {}
+
+protected:
+ void onOnceBeforeDraw() override {
+ SkTextBlobBuilder builder;
+
+ // make textblob. To stress distance fields, we choose sizes appropriately
+ SkPaint paint;
+ paint.setTextSize(162);
+ const char* text = "A";
+ sk_tool_utils::set_portable_typeface(&paint);
+
+ SkRect bounds;
+ paint.measureText(text, strlen(text), &bounds);
+ sk_tool_utils::add_to_text_blob(&builder, text, paint, 0, 0);;
+
+ // Medium
+ SkScalar xOffset = bounds.width() + 5;
+ paint.setTextSize(72);
+ text = "B";
+ sk_tool_utils::add_to_text_blob(&builder, text, paint, xOffset, 0);
+
+ paint.measureText(text, strlen(text), &bounds);
+ SkScalar yOffset = bounds.height();
+
+ // Small
+ paint.setTextSize(32);
+ text = "C";
+ sk_tool_utils::add_to_text_blob(&builder, text, paint, xOffset, -yOffset - 10);
+
+ // build
+ fBlob.reset(builder.build());
+ }
+
+ SkString onShortName() override {
+ return SkString("textblobtransforms");
+ }
+
+ SkISize onISize() override {
+ return SkISize::Make(kWidth, kHeight);
+ }
+
+ void onDraw(SkCanvas* canvas) override {
+
+ canvas->drawColor(SK_ColorGRAY);
+
+ SkPaint paint;
+
+ SkRect bounds = fBlob->bounds();
+ canvas->translate(20, 20);
+
+ // Colors were chosen to map to pairs of canonical colors. The GPU Backend will cache A8
+ // Texture Blobs based on the canonical color they map to. Canonical colors are used to
+ // create masks. For A8 there are 8 of them.
+ //SkColor colors[] = {SK_ColorCYAN, SK_ColorLTGRAY, SK_ColorYELLOW, SK_ColorWHITE};
+
+ SkScalar xOffset = SkScalarCeilToScalar(bounds.width());
+ SkScalar yOffset = SkScalarCeilToScalar(bounds.height());
+ // first translate
+ canvas->translate(xOffset, 2 * yOffset);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->translate(-xOffset, 0);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->translate(2 * xOffset, 0);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->translate(-xOffset, -yOffset);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->translate(0, 2 * yOffset);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ // now rotate
+ canvas->translate(4 * xOffset, -yOffset);
+ canvas->rotate(180.f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->rotate(-180.f);
+ canvas->translate(0, -yOffset);
+ canvas->rotate(-180.f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->rotate(270.f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->rotate(-90.f);
+ canvas->translate(-xOffset, yOffset);
+ canvas->rotate(-90.f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->rotate(90.f);
+
+ // and scales
+ canvas->translate(- 3 * xOffset, 3 * yOffset);
+ canvas->scale(1.5f, 1.5f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->translate(xOffset, 0);
+ canvas->scale(.25f, .25f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ canvas->translate(xOffset, 0);
+ canvas->scale(3.f, 2.f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ // finally rotates, scales, and translates together
+ canvas->translate(xOffset, 0);
+ canvas->rotate(23.f);
+ canvas->scale(.33f, .5f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ canvas->rotate(-46.f);
+ canvas->translate(xOffset, 0);
+ canvas->scale(1.2f, 1.1f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ canvas->rotate(46.f);
+ canvas->translate(xOffset, 0);
+ canvas->scale(1.1f, 1.2f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ canvas->rotate(46.f);
+ canvas->translate(xOffset, 0);
+ canvas->scale(.95f, 1.1f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ canvas->rotate(46.f);
+ canvas->translate(xOffset, 0);
+ canvas->scale(1.3f, .7f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ canvas->rotate(46.f);
+ canvas->translate(xOffset, 0);
+ canvas->scale(.8f, 1.1f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ canvas->rotate(10.f);
+ canvas->translate(xOffset, 0);
+ canvas->scale(1.f, 5.f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+
+ canvas->rotate(5.f);
+ canvas->translate(xOffset, 0);
+ canvas->scale(5.f, 1.f);
+ canvas->drawTextBlob(fBlob, 0, 0, paint);
+ }
+
+private:
+ SkAutoTUnref<const SkTextBlob> fBlob;
+
+ static const int kWidth = 1000;
+ static const int kHeight = 1200;
+
+ typedef GM INHERITED;
+};
+
+//////////////////////////////////////////////////////////////////////////////
+
+DEF_GM( return SkNEW(TextBlobTransforms); )
+}