2a475eae62
Many tests and examples use drawText with a guess of how long the text is in bytes, or a call to strlen(). Add a helper to SkCanvas to simplify these examples. Add another helper for SkString. R=reed@google.com Change-Id: I0204a31e938f065606f08ee7cd9a6b36db791ee2 Reviewed-on: https://skia-review.googlesource.com/13642 Commit-Queue: Cary Clark <caryclark@google.com> Reviewed-by: Cary Clark <caryclark@google.com> Reviewed-by: Mike Reed <reed@google.com> Reviewed-by: Cary Clark <caryclark@skia.org>
82 lines
2.2 KiB
C++
82 lines
2.2 KiB
C++
/*
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* Copyright 2013 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#include "gm.h"
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#include "sk_tool_utils.h"
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#include "SkCanvas.h"
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#include "SkGraphics.h"
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#include "SkTypeface.h"
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// GM to stress the GPU font cache
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static SkScalar draw_string(SkCanvas* canvas, const SkString& text, SkScalar x,
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SkScalar y, const SkPaint& paint) {
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canvas->drawString(text, x, y, paint);
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return x + paint.measureText(text.c_str(), text.size());
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}
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class FontCacheGM : public skiagm::GM {
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public:
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FontCacheGM() {}
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protected:
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SkString onShortName() override {
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return SkString("fontcache");
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}
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SkISize onISize() override {
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return SkISize::Make(1280, 640);
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}
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void onOnceBeforeDraw() override {
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fTypefaces[0] = sk_tool_utils::create_portable_typeface("serif",
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SkFontStyle::FromOldStyle(SkTypeface::kItalic));
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fTypefaces[1] = sk_tool_utils::create_portable_typeface("sans-serif",
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SkFontStyle::FromOldStyle(SkTypeface::kItalic));
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}
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void onDraw(SkCanvas* canvas) override {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setLCDRenderText(true);
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paint.setSubpixelText(true);
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paint.setTypeface(fTypefaces[0]);
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paint.setTextSize(192);
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// Make sure the nul character does not cause problems.
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paint.measureText("\0", 1);
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SkScalar x = 20;
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SkScalar y = 128;
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SkString text("ABCDEFGHIJ");
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draw_string(canvas, text, x, y, paint);
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y += 100;
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SkString text2("KLMNOPQRS");
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draw_string(canvas, text2, x, y, paint);
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y += 100;
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SkString text3("TUVWXYZ012");
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draw_string(canvas, text3, x, y, paint);
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y += 100;
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paint.setTypeface(fTypefaces[1]);
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draw_string(canvas, text, x, y, paint);
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y += 100;
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draw_string(canvas, text2, x, y, paint);
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y += 100;
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draw_string(canvas, text3, x, y, paint);
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y += 100;
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}
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private:
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sk_sp<SkTypeface> fTypefaces[2];
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM(return new FontCacheGM;)
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