120 lines
3.2 KiB
C++
120 lines
3.2 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 "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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const char* gFamilyNames[] = {
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"sans-serif", "serif", "monospace"
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};
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const SkTypeface::Style gStyles[] = {
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SkTypeface::kNormal, SkTypeface::kItalic
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};
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const SkScalar gTextSizes[] = {
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12, 14, 16, 18, 20, 22, 24, 26, 28, 30
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};
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#define TYPEFACE_COUNT (SK_ARRAY_COUNT(gFamilyNames)*SK_ARRAY_COUNT(gStyles))
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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->drawText(text.c_str(), text.size(), 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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for (size_t i = 0; i < TYPEFACE_COUNT; ++i) {
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fTypefaces[i] = NULL;
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}
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}
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virtual ~FontCacheGM() {
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for (size_t i = 0; i < TYPEFACE_COUNT; ++i) {
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SkSafeUnref(fTypefaces[i]);
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}
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}
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protected:
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virtual SkString onShortName() SK_OVERRIDE {
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return SkString("fontcache");
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}
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virtual SkISize onISize() SK_OVERRIDE {
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return SkISize::Make(640, 320);
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}
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virtual void onOnceBeforeDraw() SK_OVERRIDE {
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int typefaceCount = 0;
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for (size_t i = 0; i < SK_ARRAY_COUNT(gFamilyNames); ++i) {
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for (size_t j = 0; j < SK_ARRAY_COUNT(gStyles); ++j) {
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fTypefaces[typefaceCount++] = sk_tool_utils::create_portable_typeface(gFamilyNames[i],
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gStyles[j]);
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}
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}
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}
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virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
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SkScalar y = 32;
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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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SkString text("Ham");
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// draw some initial text to partially fill the GPU cache
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for (size_t i = 0; i < 2; ++i) {
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paint.setTypeface(fTypefaces[i]);
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SkScalar x = 20;
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for (size_t j = 0; j < SK_ARRAY_COUNT(gTextSizes); ++j) {
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paint.setTextSize(gTextSizes[j]);
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x = draw_string(canvas, text, x, y, paint) + 19;
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}
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y += 32;
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}
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// force a flush
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canvas->flush();
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// draw again, and more to overflow the cache
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for (size_t i = 0; i < TYPEFACE_COUNT; ++i) {
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paint.setTypeface(fTypefaces[i]);
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SkScalar x = 20;
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for (size_t j = 0; j < SK_ARRAY_COUNT(gTextSizes); ++j) {
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paint.setTextSize(gTextSizes[j]);
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x = draw_string(canvas, text, x, y, paint) + 19;
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}
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y += 32;
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}
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}
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virtual uint32_t onGetFlags() const SK_OVERRIDE {
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// this GM is meant only for the GPU
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return kGPUOnly_Flag;
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}
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private:
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SkTypeface* fTypefaces[TYPEFACE_COUNT];
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typedef GM INHERITED;
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};
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//////////////////////////////////////////////////////////////////////////////
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DEF_GM( return SkNEW(FontCacheGM); )
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