12857d405c
In the operation of taking the bounds of (horizontal text) and then drawing the text within those bounds it is necessary to draw the text at the origin of the bounds and not at the left edge of the bounds. Change-Id: I712e1713ca5e0be929b11f526f224141a5310cc2 Reviewed-on: https://skia-review.googlesource.com/c/skia/+/319776 Reviewed-by: Herb Derby <herb@google.com> Commit-Queue: Ben Wagner <bungeman@google.com>
100 lines
3.1 KiB
C++
100 lines
3.1 KiB
C++
/*
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* Copyright 2015 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/gm.h"
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#include "include/core/SkBlendMode.h"
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#include "include/core/SkCanvas.h"
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#include "include/core/SkColor.h"
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#include "include/core/SkFont.h"
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#include "include/core/SkPaint.h"
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#include "include/core/SkRect.h"
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#include "include/core/SkRefCnt.h"
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#include "include/core/SkScalar.h"
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#include "include/core/SkSize.h"
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#include "include/core/SkString.h"
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#include "include/core/SkTextBlob.h"
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#include "include/core/SkTypeface.h"
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#include "include/core/SkTypes.h"
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#include "tools/ToolUtils.h"
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namespace skiagm {
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constexpr int kWidth = 750;
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constexpr int kHeight = 750;
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class LcdOverlapGM : public skiagm::GM {
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public:
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LcdOverlapGM() {
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const int kPointSize = 25;
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fTextHeight = SkIntToScalar(kPointSize);
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}
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protected:
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SkString onShortName() override {
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return SkString("lcdoverlap");
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}
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void onOnceBeforeDraw() override {
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// build text blob
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SkTextBlobBuilder builder;
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SkFont font(ToolUtils::create_portable_typeface(), 32);
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const char* text = "able was I ere I saw elba";
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font.setSubpixel(true);
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font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
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ToolUtils::add_to_text_blob(&builder, text, font, 0, 0);
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fBlob = builder.make();
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}
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SkISize onISize() override { return SkISize::Make(kWidth, kHeight); }
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void drawTestCase(SkCanvas* canvas, SkScalar x, SkScalar y, SkBlendMode mode,
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SkBlendMode mode2) {
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const SkColor colors[] {
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SK_ColorRED,
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SK_ColorGREEN,
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SK_ColorBLUE,
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SK_ColorYELLOW,
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SK_ColorCYAN,
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SK_ColorMAGENTA,
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};
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for (size_t i = 0; i < SK_ARRAY_COUNT(colors); i++) {
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canvas->save();
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canvas->translate(x, y);
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canvas->rotate(360.0f / SK_ARRAY_COUNT(colors) * i);
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canvas->translate(-fBlob->bounds().width() / 2.0f - fBlob->bounds().left() + 0.5f, 0);
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SkPaint textPaint;
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textPaint.setColor(colors[i]);
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textPaint.setBlendMode(i % 2 == 0 ? mode : mode2);
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canvas->drawTextBlob(fBlob, 0, 0, textPaint);
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canvas->restore();
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}
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}
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void onDraw(SkCanvas* canvas) override {
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SkScalar offsetX = kWidth / 4.0f;
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SkScalar offsetY = kHeight / 4.0f;
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drawTestCase(canvas, offsetX, offsetY, SkBlendMode::kSrc, SkBlendMode::kSrc);
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drawTestCase(canvas, 3 * offsetX, offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrcOver);
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drawTestCase(canvas, offsetX, 3 * offsetY, SkBlendMode::kHardLight,
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SkBlendMode::kLuminosity);
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drawTestCase(canvas, 3 * offsetX, 3 * offsetY, SkBlendMode::kSrcOver, SkBlendMode::kSrc);
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}
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private:
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SkScalar fTextHeight;
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sk_sp<SkTextBlob> fBlob;
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using INHERITED = skiagm::GM;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return new LcdOverlapGM; )
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} // namespace skiagm
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