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>
120 lines
3.4 KiB
C++
120 lines
3.4 KiB
C++
/*
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* Copyright 2011 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 "SampleCode.h"
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#include "SkView.h"
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#include "SkCanvas.h"
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#include "SkGradientShader.h"
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#include "SkPath.h"
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#include "SkRegion.h"
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#include "SkShader.h"
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#include "SkUtils.h"
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#include "Sk1DPathEffect.h"
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#include "SkCornerPathEffect.h"
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#include "SkPathMeasure.h"
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#include "SkRandom.h"
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#include "SkColorPriv.h"
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#include "SkColorFilter.h"
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#include "SkDither.h"
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#include "sk_tool_utils.h"
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static void make_bm(SkBitmap* bm) {
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const SkPMColor colors[] = {
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SkPreMultiplyColor(SK_ColorRED), SkPreMultiplyColor(SK_ColorGREEN),
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SkPreMultiplyColor(SK_ColorBLUE), SkPreMultiplyColor(SK_ColorWHITE)
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};
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bm->allocPixels(SkImageInfo::Make(2, 2, kIndex_8_SkColorType,
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kOpaque_SkAlphaType),
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SkColorTable::Make(colors, 4));
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*bm->getAddr8(0, 0) = 0;
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*bm->getAddr8(1, 0) = 1;
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*bm->getAddr8(0, 1) = 2;
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*bm->getAddr8(1, 1) = 3;
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}
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static SkScalar draw_bm(SkCanvas* canvas, const SkBitmap& bm,
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SkScalar x, SkScalar y, SkPaint* paint) {
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canvas->drawBitmap(bm, x, y, paint);
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return SkIntToScalar(bm.width()) * 5/4;
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}
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static SkScalar draw_set(SkCanvas* c, const SkBitmap& bm, SkScalar x, SkPaint* p) {
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x += draw_bm(c, bm, x, 0, p);
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p->setFilterQuality(kLow_SkFilterQuality);
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x += draw_bm(c, bm, x, 0, p);
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p->setDither(true);
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return x + draw_bm(c, bm, x, 0, p);
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}
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static SkScalar draw_row(SkCanvas* canvas, const SkBitmap& bm) {
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SkAutoCanvasRestore acr(canvas, true);
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SkPaint paint;
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SkScalar x = 0;
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const int scale = 32;
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paint.setAntiAlias(true);
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const char* name = sk_tool_utils::colortype_name(bm.colorType());
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canvas->drawString(name, x, SkIntToScalar(bm.height())*scale*5/8,
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paint);
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canvas->translate(SkIntToScalar(48), 0);
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canvas->scale(SkIntToScalar(scale), SkIntToScalar(scale));
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x += draw_set(canvas, bm, 0, &paint);
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paint.reset();
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paint.setAlpha(0x80);
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draw_set(canvas, bm, x, &paint);
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return x * scale / 3;
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}
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class FilterView : public SampleView {
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public:
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SkBitmap fBM8, fBM4444, fBM16, fBM32;
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FilterView() {
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make_bm(&fBM8);
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sk_tool_utils::copy_to(&fBM4444, kARGB_4444_SkColorType, fBM8);
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sk_tool_utils::copy_to(&fBM16, kRGB_565_SkColorType, fBM8);
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sk_tool_utils::copy_to(&fBM32, kN32_SkColorType, fBM8);
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this->setBGColor(0xFFDDDDDD);
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}
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protected:
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// overrides from SkEventSink
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virtual bool onQuery(SkEvent* evt) {
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if (SampleCode::TitleQ(*evt)) {
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SampleCode::TitleR(evt, "Filter");
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return true;
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}
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return this->INHERITED::onQuery(evt);
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}
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virtual void onDrawContent(SkCanvas* canvas) {
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SkScalar x = SkIntToScalar(10);
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SkScalar y = SkIntToScalar(10);
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canvas->translate(x, y);
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y = draw_row(canvas, fBM8);
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canvas->translate(0, y);
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y = draw_row(canvas, fBM4444);
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canvas->translate(0, y);
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y = draw_row(canvas, fBM16);
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canvas->translate(0, y);
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draw_row(canvas, fBM32);
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}
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private:
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typedef SampleView INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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static SkView* MyFactory() { return new FilterView; }
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static SkViewRegister reg(MyFactory);
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