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skia2/tests/TextBlobCacheTest.cpp
Robert Phillips e19babf996 Remove GrAtlasManager.h from all other .h files 
Having GrAtlasManager.h in GrContextPriv.h was needlessly propagating dependence on that header.

Change-Id: Idf5836f1e217ecd2da91f751b488a63a884c02ce
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/281739
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
2020-04-07 12:43:46 +00:00

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/*
* 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 "tools/ToolUtils.h"
#include <string>
#include "include/core/SkCanvas.h"
#include "include/core/SkFontMgr.h"
#include "include/core/SkGraphics.h"
#include "include/core/SkPaint.h"
#include "include/core/SkPoint.h"
#include "include/core/SkSurface.h"
#include "include/core/SkTextBlob.h"
#include "include/core/SkTypeface.h"
#include "src/core/SkGlyphRun.h"
#include "tools/fonts/RandomScalerContext.h"
#ifdef SK_BUILD_FOR_WIN
#include "include/ports/SkTypeface_win.h"
#endif
#include "tests/Test.h"
#include "include/gpu/GrContext.h"
#include "src/gpu/GrContextPriv.h"
#include "src/gpu/text/GrAtlasManager.h"
static void draw(SkCanvas* canvas, int redraw, const SkTArray<sk_sp<SkTextBlob>>& blobs) {
int yOffset = 0;
for (int r = 0; r < redraw; r++) {
for (int i = 0; i < blobs.count(); i++) {
const auto& blob = blobs[i];
const SkRect& bounds = blob->bounds();
yOffset += SkScalarCeilToInt(bounds.height());
SkPaint paint;
canvas->drawTextBlob(blob, 0, SkIntToScalar(yOffset), paint);
}
}
}
static const int kWidth = 1024;
static const int kHeight = 768;
static void setup_always_evict_atlas(GrContext* context) {
context->priv().getAtlasManager()->setAtlasDimensionsToMinimum_ForTesting();
}
// This test hammers the GPU textblobcache and font atlas
static void text_blob_cache_inner(skiatest::Reporter* reporter, GrContext* context,
int maxTotalText, int maxGlyphID, int maxFamilies, bool normal,
bool stressTest) {
// setup surface
uint32_t flags = 0;
SkSurfaceProps props(flags, SkSurfaceProps::kLegacyFontHost_InitType);
// configure our context for maximum stressing of cache and atlas
if (stressTest) {
setup_always_evict_atlas(context);
context->priv().testingOnly_setTextBlobCacheLimit(0);
}
SkImageInfo info = SkImageInfo::Make(kWidth, kHeight, kRGBA_8888_SkColorType,
kPremul_SkAlphaType);
auto surface(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, info, 0, &props));
REPORTER_ASSERT(reporter, surface);
if (!surface) {
return;
}
SkCanvas* canvas = surface->getCanvas();
sk_sp<SkFontMgr> fm(SkFontMgr::RefDefault());
int count = std::min(fm->countFamilies(), maxFamilies);
// make a ton of text
SkAutoTArray<uint16_t> text(maxTotalText);
for (int i = 0; i < maxTotalText; i++) {
text[i] = i % maxGlyphID;
}
// generate textblobs
SkTArray<sk_sp<SkTextBlob>> blobs;
for (int i = 0; i < count; i++) {
SkFont font;
font.setSize(48); // draw big glyphs to really stress the atlas
SkString familyName;
fm->getFamilyName(i, &familyName);
sk_sp<SkFontStyleSet> set(fm->createStyleSet(i));
for (int j = 0; j < set->count(); ++j) {
SkFontStyle fs;
set->getStyle(j, &fs, nullptr);
// We use a typeface which randomy returns unexpected mask formats to fuzz
sk_sp<SkTypeface> orig(set->createTypeface(j));
if (normal) {
font.setTypeface(orig);
} else {
font.setTypeface(sk_make_sp<SkRandomTypeface>(orig, SkPaint(), true));
}
SkTextBlobBuilder builder;
for (int aa = 0; aa < 2; aa++) {
for (int subpixel = 0; subpixel < 2; subpixel++) {
for (int lcd = 0; lcd < 2; lcd++) {
font.setEdging(SkFont::Edging::kAlias);
if (aa) {
font.setEdging(SkFont::Edging::kAntiAlias);
if (lcd) {
font.setEdging(SkFont::Edging::kSubpixelAntiAlias);
}
}
font.setSubpixel(SkToBool(subpixel));
if (!SkToBool(lcd)) {
font.setSize(160);
}
const SkTextBlobBuilder::RunBuffer& run = builder.allocRun(font,
maxTotalText,
0, 0,
nullptr);
memcpy(run.glyphs, text.get(), maxTotalText * sizeof(uint16_t));
}
}
}
blobs.emplace_back(builder.make());
}
}
// create surface where LCD is impossible
info = SkImageInfo::Make(kWidth, kHeight, kRGBA_8888_SkColorType, kPremul_SkAlphaType);
SkSurfaceProps propsNoLCD(0, kUnknown_SkPixelGeometry);
auto surfaceNoLCD(canvas->makeSurface(info, &propsNoLCD));
REPORTER_ASSERT(reporter, surface);
if (!surface) {
return;
}
SkCanvas* canvasNoLCD = surfaceNoLCD->getCanvas();
// test redraw
draw(canvas, 2, blobs);
draw(canvasNoLCD, 2, blobs);
// test draw after free
context->freeGpuResources();
draw(canvas, 1, blobs);
context->freeGpuResources();
draw(canvasNoLCD, 1, blobs);
// test draw after abandon
context->abandonContext();
draw(canvas, 1, blobs);
}
DEF_GPUTEST_FOR_MOCK_CONTEXT(TextBlobCache, reporter, ctxInfo) {
text_blob_cache_inner(reporter, ctxInfo.grContext(), 1024, 256, 30, true, false);
}
DEF_GPUTEST_FOR_MOCK_CONTEXT(TextBlobStressCache, reporter, ctxInfo) {
text_blob_cache_inner(reporter, ctxInfo.grContext(), 256, 256, 10, true, true);
}
DEF_GPUTEST_FOR_MOCK_CONTEXT(TextBlobAbnormal, reporter, ctxInfo) {
text_blob_cache_inner(reporter, ctxInfo.grContext(), 256, 256, 10, false, false);
}
DEF_GPUTEST_FOR_MOCK_CONTEXT(TextBlobStressAbnormal, reporter, ctxInfo) {
text_blob_cache_inner(reporter, ctxInfo.grContext(), 256, 256, 10, false, true);
}
static const int kScreenDim = 160;
static SkBitmap draw_blob(SkTextBlob* blob, SkSurface* surface, SkPoint offset) {
SkPaint paint;
SkCanvas* canvas = surface->getCanvas();
canvas->save();
canvas->drawColor(SK_ColorWHITE, SkBlendMode::kSrc);
canvas->translate(offset.fX, offset.fY);
canvas->drawTextBlob(blob, 0, 0, paint);
SkBitmap bitmap;
bitmap.allocN32Pixels(kScreenDim, kScreenDim);
surface->readPixels(bitmap, 0, 0);
canvas->restore();
return bitmap;
}
static bool compare_bitmaps(const SkBitmap& expected, const SkBitmap& actual) {
SkASSERT(expected.width() == actual.width());
SkASSERT(expected.height() == actual.height());
for (int i = 0; i < expected.width(); ++i) {
for (int j = 0; j < expected.height(); ++j) {
SkColor expectedColor = expected.getColor(i, j);
SkColor actualColor = actual.getColor(i, j);
if (expectedColor != actualColor) {
return false;
}
}
}
return true;
}
static sk_sp<SkTextBlob> make_blob() {
auto tf = SkTypeface::MakeFromName("Roboto2-Regular", SkFontStyle());
SkFont font;
font.setTypeface(tf);
font.setSubpixel(false);
font.setEdging(SkFont::Edging::kAlias);
font.setSize(24);
static char text[] = "HekpqB";
static const int maxGlyphLen = sizeof(text) * 4;
SkGlyphID glyphs[maxGlyphLen];
int glyphCount =
font.textToGlyphs(text, sizeof(text), SkTextEncoding::kUTF8, glyphs, maxGlyphLen);
SkTextBlobBuilder builder;
const auto& runBuffer = builder.allocRun(font, glyphCount, 0, 0);
for (int i = 0; i < glyphCount; i++) {
runBuffer.glyphs[i] = glyphs[i];
}
return builder.make();
}
static const bool kDumpPngs = true;
// dump pngs needs a "good" and a "bad" directory to put the results in. This allows the use of the
// skdiff tool to visualize the differences.
void write_png(const std::string& filename, const SkBitmap& bitmap) {
auto data = SkEncodeBitmap(bitmap, SkEncodedImageFormat::kPNG, 0);
SkFILEWStream w{filename.c_str()};
w.write(data->data(), data->size());
w.fsync();
}
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(TextBlobJaggedGlyph, reporter, ctxInfo) {
auto grContext = ctxInfo.grContext();
const SkImageInfo info =
SkImageInfo::Make(kScreenDim, kScreenDim, kN32_SkColorType, kPremul_SkAlphaType);
auto surface = SkSurface::MakeRenderTarget(grContext, SkBudgeted::kNo, info);
auto blob = make_blob();
for (int y = 40; y < kScreenDim - 40; y++) {
SkBitmap base = draw_blob(blob.get(), surface.get(), {40, y + 0.0f});
SkBitmap half = draw_blob(blob.get(), surface.get(), {40, y + 0.5f});
SkBitmap unit = draw_blob(blob.get(), surface.get(), {40, y + 1.0f});
bool isOk = compare_bitmaps(base, half) || compare_bitmaps(unit, half);
REPORTER_ASSERT(reporter, isOk);
if (!isOk) {
if (kDumpPngs) {
{
std::string filename = "bad/half-y" + std::to_string(y) + ".png";
write_png(filename, half);
}
{
std::string filename = "good/half-y" + std::to_string(y) + ".png";
write_png(filename, base);
}
}
break;
}
}
// Testing the x direction across all platforms does not workout, because letter spacing can
// change based on non-integer advance widths, but this has been useful for diagnosing problems.
#if 0
blob = make_blob();
for (int x = 40; x < kScreenDim - 40; x++) {
SkBitmap base = draw_blob(blob.get(), surface.get(), {x + 0.0f, 40});
SkBitmap half = draw_blob(blob.get(), surface.get(), {x + 0.5f, 40});
SkBitmap unit = draw_blob(blob.get(), surface.get(), {x + 1.0f, 40});
bool isOk = compare_bitmaps(base, half) || compare_bitmaps(unit, half);
REPORTER_ASSERT(reporter, isOk);
if (!isOk) {
if (kDumpPngs) {
{
std::string filename = "bad/half-x" + std::to_string(x) + ".png";
write_png(filename, half);
}
{
std::string filename = "good/half-x" + std::to_string(x) + ".png";
write_png(filename, base);
}
}
break;
}
}
#endif
}
DEF_GPUTEST_FOR_RENDERING_CONTEXTS(TextBlobSmoothScroll, reporter, ctxInfo) {
auto grContext = ctxInfo.grContext();
const SkImageInfo info =
SkImageInfo::Make(kScreenDim, kScreenDim, kN32_SkColorType, kPremul_SkAlphaType);
auto surface = SkSurface::MakeRenderTarget(grContext, SkBudgeted::kNo, info);
auto movingBlob = make_blob();
for (SkScalar y = 40; y < 50; y += 1.0/8.0) {
auto expectedBlob = make_blob();
auto expectedBitMap = draw_blob(expectedBlob.get(), surface.get(), {40, y});
auto movingBitmap = draw_blob(movingBlob.get(), surface.get(), {40, y});
bool isOk = compare_bitmaps(expectedBitMap, movingBitmap);
REPORTER_ASSERT(reporter, isOk);
if (!isOk) {
if (kDumpPngs) {
{
std::string filename = "bad/scroll-y" + std::to_string(y) + ".png";
write_png(filename, movingBitmap);
}
{
std::string filename = "good/scroll-y" + std::to_string(y) + ".png";
write_png(filename, expectedBitMap);
}
}
break;
}
}
}
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