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moz-skia
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moz-skia/tests/PictureTest.cpp

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/*
* Copyright 2012 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "SkBitmapDevice.h"
#include "SkCanvas.h"
#include "SkColorPriv.h"
#include "SkData.h"
#include "SkDecodingImageGenerator.h"
#include "SkError.h"
#include "SkImageEncoder.h"
#include "SkImageGenerator.h"
#include "SkPaint.h"
#include "SkPicture.h"
#include "SkPictureUtils.h"
#include "SkRRect.h"
#include "SkRandom.h"
#include "SkShader.h"
#include "SkStream.h"
#include "Test.h"
static const int gColorScale = 30;
static const int gColorOffset = 60;
static void make_bm(SkBitmap* bm, int w, int h, SkColor color, bool immutable) {
bm->allocN32Pixels(w, h);
bm->eraseColor(color);
if (immutable) {
bm->setImmutable();
}
}
static void make_checkerboard(SkBitmap* bm, int w, int h, bool immutable) {
SkASSERT(w % 2 == 0);
SkASSERT(h % 2 == 0);
bm->allocPixels(SkImageInfo::Make(w, h, kAlpha_8_SkColorType,
kPremul_SkAlphaType));
SkAutoLockPixels lock(*bm);
for (int y = 0; y < h; y += 2) {
uint8_t* s = bm->getAddr8(0, y);
for (int x = 0; x < w; x += 2) {
*s++ = 0xFF;
*s++ = 0x00;
}
s = bm->getAddr8(0, y + 1);
for (int x = 0; x < w; x += 2) {
*s++ = 0x00;
*s++ = 0xFF;
}
}
if (immutable) {
bm->setImmutable();
}
}
static void init_paint(SkPaint* paint, const SkBitmap &bm) {
SkShader* shader = SkShader::CreateBitmapShader(bm,
SkShader::kClamp_TileMode,
SkShader::kClamp_TileMode);
paint->setShader(shader)->unref();
}
typedef void (*DrawBitmapProc)(SkCanvas*, const SkBitmap&,
const SkBitmap&, const SkPoint&,
SkTDArray<SkPixelRef*>* usedPixRefs);
static void drawpaint_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
canvas->drawPaint(paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawpoints_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
// draw a rect
SkPoint points[5] = {
{ pos.fX, pos.fY },
{ pos.fX + bm.width() - 1, pos.fY },
{ pos.fX + bm.width() - 1, pos.fY + bm.height() - 1 },
{ pos.fX, pos.fY + bm.height() - 1 },
{ pos.fX, pos.fY },
};
canvas->drawPoints(SkCanvas::kPolygon_PointMode, 5, points, paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawrect_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
r.offset(pos.fX, pos.fY);
canvas->drawRect(r, paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawoval_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
r.offset(pos.fX, pos.fY);
canvas->drawOval(r, paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawrrect_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
r.offset(pos.fX, pos.fY);
SkRRect rr;
rr.setRectXY(r, SkIntToScalar(bm.width())/4, SkIntToScalar(bm.height())/4);
canvas->drawRRect(rr, paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawpath_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
SkPath path;
path.lineTo(bm.width()/2.0f, SkIntToScalar(bm.height()));
path.lineTo(SkIntToScalar(bm.width()), 0);
path.close();
path.offset(pos.fX, pos.fY);
canvas->drawPath(path, paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawbitmap_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
canvas->drawBitmap(bm, pos.fX, pos.fY, NULL);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawbitmap_withshader_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
// The bitmap in the paint is ignored unless we're drawing an A8 bitmap
canvas->drawBitmap(altBM, pos.fX, pos.fY, &paint);
*usedPixRefs->append() = bm.pixelRef();
*usedPixRefs->append() = altBM.pixelRef();
}
static void drawsprite_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
const SkMatrix& ctm = canvas->getTotalMatrix();
SkPoint p(pos);
ctm.mapPoints(&p, 1);
canvas->drawSprite(bm, (int)p.fX, (int)p.fY, NULL);
*usedPixRefs->append() = bm.pixelRef();
}
#if 0
// Although specifiable, this case doesn't seem to make sense (i.e., the
// bitmap in the shader is never used).
static void drawsprite_withshader_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
const SkMatrix& ctm = canvas->getTotalMatrix();
SkPoint p(pos);
ctm.mapPoints(&p, 1);
canvas->drawSprite(altBM, (int)p.fX, (int)p.fY, &paint);
*usedPixRefs->append() = bm.pixelRef();
*usedPixRefs->append() = altBM.pixelRef();
}
#endif
static void drawbitmaprect_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
r.offset(pos.fX, pos.fY);
canvas->drawBitmapRectToRect(bm, NULL, r, NULL);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawbitmaprect_withshader_proc(SkCanvas* canvas,
const SkBitmap& bm,
const SkBitmap& altBM,
const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
SkRect r = { 0, 0, SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) };
r.offset(pos.fX, pos.fY);
// The bitmap in the paint is ignored unless we're drawing an A8 bitmap
canvas->drawBitmapRectToRect(altBM, NULL, r, &paint);
*usedPixRefs->append() = bm.pixelRef();
*usedPixRefs->append() = altBM.pixelRef();
}
static void drawtext_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
paint.setTextSize(SkIntToScalar(1.5*bm.width()));
canvas->drawText("0", 1, pos.fX, pos.fY+bm.width(), paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawpostext_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
paint.setTextSize(SkIntToScalar(1.5*bm.width()));
SkPoint point = { pos.fX, pos.fY + bm.height() };
canvas->drawPosText("O", 1, &point, paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawtextonpath_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
paint.setTextSize(SkIntToScalar(1.5*bm.width()));
SkPath path;
path.lineTo(SkIntToScalar(bm.width()), 0);
path.offset(pos.fX, pos.fY+bm.height());
canvas->drawTextOnPath("O", 1, path, NULL, paint);
*usedPixRefs->append() = bm.pixelRef();
}
static void drawverts_proc(SkCanvas* canvas, const SkBitmap& bm,
const SkBitmap& altBM, const SkPoint& pos,
SkTDArray<SkPixelRef*>* usedPixRefs) {
SkPaint paint;
init_paint(&paint, bm);
SkPoint verts[4] = {
{ pos.fX, pos.fY },
{ pos.fX + bm.width(), pos.fY },
{ pos.fX + bm.width(), pos.fY + bm.height() },
{ pos.fX, pos.fY + bm.height() }
};
SkPoint texs[4] = { { 0, 0 },
{ SkIntToScalar(bm.width()), 0 },
{ SkIntToScalar(bm.width()), SkIntToScalar(bm.height()) },
{ 0, SkIntToScalar(bm.height()) } };
uint16_t indices[6] = { 0, 1, 2, 0, 2, 3 };
canvas->drawVertices(SkCanvas::kTriangles_VertexMode, 4, verts, texs, NULL, NULL,
indices, 6, paint);
*usedPixRefs->append() = bm.pixelRef();
}
// Return a picture with the bitmaps drawn at the specified positions.
static SkPicture* record_bitmaps(const SkBitmap bm[],
const SkPoint pos[],
SkTDArray<SkPixelRef*> analytic[],
int count,
DrawBitmapProc proc) {
SkPicture* pic = new SkPicture;
SkCanvas* canvas = pic->beginRecording(1000, 1000);
for (int i = 0; i < count; ++i) {
analytic[i].rewind();
canvas->save();
SkRect clipRect = SkRect::MakeXYWH(pos[i].fX, pos[i].fY,
SkIntToScalar(bm[i].width()),
SkIntToScalar(bm[i].height()));
canvas->clipRect(clipRect, SkRegion::kIntersect_Op);
proc(canvas, bm[i], bm[count+i], pos[i], &analytic[i]);
canvas->restore();
}
pic->endRecording();
return pic;
}
static void rand_rect(SkRect* rect, SkRandom& rand, SkScalar W, SkScalar H) {
rect->fLeft = rand.nextRangeScalar(-W, 2*W);
rect->fTop = rand.nextRangeScalar(-H, 2*H);
rect->fRight = rect->fLeft + rand.nextRangeScalar(0, W);
rect->fBottom = rect->fTop + rand.nextRangeScalar(0, H);
// we integralize rect to make our tests more predictable, since Gather is
// a little sloppy.
SkIRect ir;
rect->round(&ir);
rect->set(ir);
}
static void draw(SkPicture* pic, int width, int height, SkBitmap* result) {
make_bm(result, width, height, SK_ColorBLACK, false);
SkCanvas canvas(*result);
canvas.drawPicture(*pic);
}
template <typename T> int find_index(const T* array, T elem, int count) {
for (int i = 0; i < count; ++i) {
if (array[i] == elem) {
return i;
}
}
return -1;
}
// Return true if 'ref' is found in array[]
static bool find(SkPixelRef const * const * array, SkPixelRef const * ref, int count) {
return find_index<const SkPixelRef*>(array, ref, count) >= 0;
}
// Look at each pixel that is inside 'subset', and if its color appears in
// colors[], find the corresponding value in refs[] and append that ref into
// array, skipping duplicates of the same value.
// Note that gathering pixelRefs from rendered colors suffers from the problem
// that multiple simultaneous textures (e.g., A8 for alpha and 8888 for color)
// isn't easy to reconstruct.
static void gather_from_image(const SkBitmap& bm, SkPixelRef* const refs[],
int count, SkTDArray<SkPixelRef*>* array,
const SkRect& subset) {
SkIRect ir;
subset.roundOut(&ir);
if (!ir.intersect(0, 0, bm.width()-1, bm.height()-1)) {
return;
}
// Since we only want to return unique values in array, when we scan we just
// set a bit for each index'd color found. In practice we only have a few
// distinct colors, so we just use an int's bits as our array. Hence the
// assert that count <= number-of-bits-in-our-int.
SkASSERT((unsigned)count <= 32);
uint32_t bitarray = 0;
SkAutoLockPixels alp(bm);
for (int y = ir.fTop; y < ir.fBottom; ++y) {
for (int x = ir.fLeft; x < ir.fRight; ++x) {
SkPMColor pmc = *bm.getAddr32(x, y);
// the only good case where the color is not found would be if
// the color is transparent, meaning no bitmap was drawn in that
// pixel.
if (pmc) {
uint32_t index = SkGetPackedR32(pmc);
SkASSERT(SkGetPackedG32(pmc) == index);
SkASSERT(SkGetPackedB32(pmc) == index);
if (0 == index) {
continue; // background color
}
SkASSERT(0 == (index - gColorOffset) % gColorScale);
index = (index - gColorOffset) / gColorScale;
SkASSERT(static_cast<int>(index) < count);
bitarray |= 1 << index;
}
}
}
for (int i = 0; i < count; ++i) {
if (bitarray & (1 << i)) {
*array->append() = refs[i];
}
}
}
static void gather_from_analytic(const SkPoint pos[], SkScalar w, SkScalar h,
const SkTDArray<SkPixelRef*> analytic[],
int count,
SkTDArray<SkPixelRef*>* result,
const SkRect& subset) {
for (int i = 0; i < count; ++i) {
SkRect rect = SkRect::MakeXYWH(pos[i].fX, pos[i].fY, w, h);
if (SkRect::Intersects(subset, rect)) {
result->append(analytic[i].count(), analytic[i].begin());
}
}
}
static const DrawBitmapProc gProcs[] = {
drawpaint_proc,
drawpoints_proc,
drawrect_proc,
drawoval_proc,
drawrrect_proc,
drawpath_proc,
drawbitmap_proc,
drawbitmap_withshader_proc,
drawsprite_proc,
#if 0
drawsprite_withshader_proc,
#endif
drawbitmaprect_proc,
drawbitmaprect_withshader_proc,
drawtext_proc,
drawpostext_proc,
drawtextonpath_proc,
drawverts_proc,
};
static void create_textures(SkBitmap* bm, SkPixelRef** refs, int num, int w, int h) {
// Our convention is that the color components contain an encoding of
// the index of their corresponding bitmap/pixelref. (0,0,0,0) is
// reserved for the background
for (int i = 0; i < num; ++i) {
make_bm(&bm[i], w, h,
SkColorSetARGB(0xFF,
gColorScale*i+gColorOffset,
gColorScale*i+gColorOffset,
gColorScale*i+gColorOffset),
true);
refs[i] = bm[i].pixelRef();
}
// The A8 alternate bitmaps are all BW checkerboards
for (int i = 0; i < num; ++i) {
make_checkerboard(&bm[num+i], w, h, true);
refs[num+i] = bm[num+i].pixelRef();
}
}
static void test_gatherpixelrefs(skiatest::Reporter* reporter) {
const int IW = 32;
const int IH = IW;
const SkScalar W = SkIntToScalar(IW);
const SkScalar H = W;
static const int N = 4;
SkBitmap bm[2*N];
SkPixelRef* refs[2*N];
SkTDArray<SkPixelRef*> analytic[N];
const SkPoint pos[N] = {
{ 0, 0 }, { W, 0 }, { 0, H }, { W, H }
};
create_textures(bm, refs, N, IW, IH);
SkRandom rand;
for (size_t k = 0; k < SK_ARRAY_COUNT(gProcs); ++k) {
SkAutoTUnref<SkPicture> pic(record_bitmaps(bm, pos, analytic, N, gProcs[k]));
REPORTER_ASSERT(reporter, pic->willPlayBackBitmaps() || N == 0);
// quick check for a small piece of each quadrant, which should just
// contain 1 or 2 bitmaps.
for (size_t i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
SkRect r;
r.set(2, 2, W - 2, H - 2);
r.offset(pos[i].fX, pos[i].fY);
SkAutoDataUnref data(SkPictureUtils::GatherPixelRefs(pic, r));
REPORTER_ASSERT(reporter, data);
if (data) {
SkPixelRef** gatheredRefs = (SkPixelRef**)data->data();
int count = static_cast<int>(data->size() / sizeof(SkPixelRef*));
REPORTER_ASSERT(reporter, 1 == count || 2 == count);
if (1 == count) {
REPORTER_ASSERT(reporter, gatheredRefs[0] == refs[i]);
} else if (2 == count) {
REPORTER_ASSERT(reporter,
(gatheredRefs[0] == refs[i] && gatheredRefs[1] == refs[i+N]) ||
(gatheredRefs[1] == refs[i] && gatheredRefs[0] == refs[i+N]));
}
}
}
SkBitmap image;
draw(pic, 2*IW, 2*IH, &image);
// Test a bunch of random (mostly) rects, and compare the gather results
// with a deduced list of refs by looking at the colors drawn.
for (int j = 0; j < 100; ++j) {
SkRect r;
rand_rect(&r, rand, 2*W, 2*H);
SkTDArray<SkPixelRef*> fromImage;
gather_from_image(image, refs, N, &fromImage, r);
SkTDArray<SkPixelRef*> fromAnalytic;
gather_from_analytic(pos, W, H, analytic, N, &fromAnalytic, r);
SkData* data = SkPictureUtils::GatherPixelRefs(pic, r);
size_t dataSize = data ? data->size() : 0;
int gatherCount = static_cast<int>(dataSize / sizeof(SkPixelRef*));
SkASSERT(gatherCount * sizeof(SkPixelRef*) == dataSize);
SkPixelRef** gatherRefs = data ? (SkPixelRef**)(data->data()) : NULL;
SkAutoDataUnref adu(data);
// Everything that we saw drawn should appear in the analytic list
// but the analytic list may contain some pixelRefs that were not
// seen in the image (e.g., A8 textures used as masks)
for (int i = 0; i < fromImage.count(); ++i) {
REPORTER_ASSERT(reporter, -1 != fromAnalytic.find(fromImage[i]));
}
/*
* GatherPixelRefs is conservative, so it can return more bitmaps
* than are strictly required. Thus our check here is only that
* Gather didn't miss any that we actually needed. Even that isn't
* a strict requirement on Gather, which is meant to be quick and
* only mostly-correct, but at the moment this test should work.
*/
for (int i = 0; i < fromAnalytic.count(); ++i) {
bool found = find(gatherRefs, fromAnalytic[i], gatherCount);
REPORTER_ASSERT(reporter, found);
#if 0
// enable this block of code to debug failures, as it will rerun
// the case that failed.
if (!found) {
SkData* data = SkPictureUtils::GatherPixelRefs(pic, r);
size_t dataSize = data ? data->size() : 0;
}
#endif
}
}
}
}
static void test_gatherpixelrefsandrects(skiatest::Reporter* reporter) {
const int IW = 32;
const int IH = IW;
const SkScalar W = SkIntToScalar(IW);
const SkScalar H = W;
static const int N = 4;
SkBitmap bm[2*N];
SkPixelRef* refs[2*N];
SkTDArray<SkPixelRef*> analytic[N];
const SkPoint pos[N] = {
{ 0, 0 }, { W, 0 }, { 0, H }, { W, H }
};
create_textures(bm, refs, N, IW, IH);
SkRandom rand;
for (size_t k = 0; k < SK_ARRAY_COUNT(gProcs); ++k) {
SkAutoTUnref<SkPicture> pic(record_bitmaps(bm, pos, analytic, N, gProcs[k]));
REPORTER_ASSERT(reporter, pic->willPlayBackBitmaps() || N == 0);
SkAutoTUnref<SkPictureUtils::SkPixelRefContainer> prCont(
new SkPictureUtils::SkPixelRefsAndRectsList);
SkPictureUtils::GatherPixelRefsAndRects(pic, prCont);
// quick check for a small piece of each quadrant, which should just
// contain 1 or 2 bitmaps.
for (size_t i = 0; i < SK_ARRAY_COUNT(pos); ++i) {
SkRect r;
r.set(2, 2, W - 2, H - 2);
r.offset(pos[i].fX, pos[i].fY);
SkTDArray<SkPixelRef*> gatheredRefs;
prCont->query(r, &gatheredRefs);
int count = gatheredRefs.count();
REPORTER_ASSERT(reporter, 1 == count || 2 == count);
if (1 == count) {
REPORTER_ASSERT(reporter, gatheredRefs[0] == refs[i]);
} else if (2 == count) {
REPORTER_ASSERT(reporter,
(gatheredRefs[0] == refs[i] && gatheredRefs[1] == refs[i+N]) ||
(gatheredRefs[1] == refs[i] && gatheredRefs[0] == refs[i+N]));
}
}
SkBitmap image;
draw(pic, 2*IW, 2*IH, &image);
// Test a bunch of random (mostly) rects, and compare the gather results
// with the analytic results and the pixel refs seen in a rendering.
for (int j = 0; j < 100; ++j) {
SkRect r;
rand_rect(&r, rand, 2*W, 2*H);
SkTDArray<SkPixelRef*> fromImage;
gather_from_image(image, refs, N, &fromImage, r);
SkTDArray<SkPixelRef*> fromAnalytic;
gather_from_analytic(pos, W, H, analytic, N, &fromAnalytic, r);
SkTDArray<SkPixelRef*> gatheredRefs;
prCont->query(r, &gatheredRefs);
// Everything that we saw drawn should appear in the analytic list
// but the analytic list may contain some pixelRefs that were not
// seen in the image (e.g., A8 textures used as masks)
for (int i = 0; i < fromImage.count(); ++i) {
REPORTER_ASSERT(reporter, -1 != fromAnalytic.find(fromImage[i]));
}
// Everything in the analytic list should appear in the gathered
// list.
for (int i = 0; i < fromAnalytic.count(); ++i) {
REPORTER_ASSERT(reporter, -1 != gatheredRefs.find(fromAnalytic[i]));
}
}
}
}
#ifdef SK_DEBUG
// Ensure that deleting SkPicturePlayback does not assert. Asserts only fire in debug mode, so only
// run in debug mode.
static void test_deleting_empty_playback() {
SkPicture picture;
// Creates an SkPictureRecord
picture.beginRecording(0, 0);
// Turns that into an SkPicturePlayback
picture.endRecording();
// Deletes the old SkPicturePlayback, and creates a new SkPictureRecord
picture.beginRecording(0, 0);
}
// Ensure that serializing an empty picture does not assert. Likewise only runs in debug mode.
static void test_serializing_empty_picture() {
SkPicture picture;
picture.beginRecording(0, 0);
picture.endRecording();
SkDynamicMemoryWStream stream;
picture.serialize(&stream);
}
#endif
static void rand_op(SkCanvas* canvas, SkRandom& rand) {
SkPaint paint;
SkRect rect = SkRect::MakeWH(50, 50);
SkScalar unit = rand.nextUScalar1();
if (unit <= 0.3) {
// SkDebugf("save\n");
canvas->save();
} else if (unit <= 0.6) {
// SkDebugf("restore\n");
canvas->restore();
} else if (unit <= 0.9) {
// SkDebugf("clip\n");
canvas->clipRect(rect);
} else {
// SkDebugf("draw\n");
canvas->drawPaint(paint);
}
}
static void set_canvas_to_save_count_4(SkCanvas* canvas) {
canvas->restoreToCount(1);
canvas->save();
canvas->save();
canvas->save();
}
static void test_unbalanced_save_restores(skiatest::Reporter* reporter) {
SkCanvas testCanvas(100, 100);
set_canvas_to_save_count_4(&testCanvas);
REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
SkPaint paint;
SkRect rect = SkRect::MakeLTRB(-10000000, -10000000, 10000000, 10000000);
SkPicture extra_save_picture;
extra_save_picture.beginRecording(100, 100);
extra_save_picture.getRecordingCanvas()->save();
extra_save_picture.getRecordingCanvas()->translate(10, 10);
extra_save_picture.getRecordingCanvas()->drawRect(rect, paint);
extra_save_picture.getRecordingCanvas()->save();
extra_save_picture.getRecordingCanvas()->translate(10, 10);
extra_save_picture.getRecordingCanvas()->drawRect(rect, paint);
testCanvas.drawPicture(extra_save_picture);
REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
set_canvas_to_save_count_4(&testCanvas);
SkPicture extra_restore_picture;
extra_restore_picture.beginRecording(100, 100);
extra_restore_picture.getRecordingCanvas()->save();
extra_restore_picture.getRecordingCanvas()->translate(10, 10);
extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
extra_restore_picture.getRecordingCanvas()->save();
extra_restore_picture.getRecordingCanvas()->translate(10, 10);
extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
extra_restore_picture.getRecordingCanvas()->restore();
extra_restore_picture.getRecordingCanvas()->restore();
extra_restore_picture.getRecordingCanvas()->restore();
extra_restore_picture.getRecordingCanvas()->restore();
testCanvas.drawPicture(extra_save_picture);
REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
SkPicture no_save_picture;
extra_restore_picture.beginRecording(100, 100);
extra_restore_picture.getRecordingCanvas()->translate(10, 10);
extra_restore_picture.getRecordingCanvas()->drawRect(rect, paint);
testCanvas.drawPicture(extra_save_picture);
REPORTER_ASSERT(reporter, 4 == testCanvas.getSaveCount());
REPORTER_ASSERT(reporter, testCanvas.getTotalMatrix().isIdentity());
}
static void test_peephole() {
SkRandom rand;
for (int j = 0; j < 100; j++) {
SkRandom rand2(rand); // remember the seed
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(100, 100);
for (int i = 0; i < 1000; ++i) {
rand_op(canvas, rand);
}
picture.endRecording();
rand = rand2;
}
{
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(100, 100);
SkRect rect = SkRect::MakeWH(50, 50);
for (int i = 0; i < 100; ++i) {
canvas->save();
}
while (canvas->getSaveCount() > 1) {
canvas->clipRect(rect);
canvas->restore();
}
picture.endRecording();
}
}
#ifndef SK_DEBUG
// Only test this is in release mode. We deliberately crash in debug mode, since a valid caller
// should never do this.
static void test_bad_bitmap() {
// This bitmap has a width and height but no pixels. As a result, attempting to record it will
// fail.
SkBitmap bm;
bm.setConfig(SkImageInfo::MakeN32Premul(100, 100));
SkPicture picture;
SkCanvas* recordingCanvas = picture.beginRecording(100, 100);
recordingCanvas->drawBitmap(bm, 0, 0);
picture.endRecording();
SkCanvas canvas;
canvas.drawPicture(picture);
}
#endif
static SkData* encode_bitmap_to_data(size_t*, const SkBitmap& bm) {
return SkImageEncoder::EncodeData(bm, SkImageEncoder::kPNG_Type, 100);
}
static SkData* serialized_picture_from_bitmap(const SkBitmap& bitmap) {
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(bitmap.width(), bitmap.height());
canvas->drawBitmap(bitmap, 0, 0);
SkDynamicMemoryWStream wStream;
picture.serialize(&wStream, &encode_bitmap_to_data);
return wStream.copyToData();
}
struct ErrorContext {
int fErrors;
skiatest::Reporter* fReporter;
};
static void assert_one_parse_error_cb(SkError error, void* context) {
ErrorContext* errorContext = static_cast<ErrorContext*>(context);
errorContext->fErrors++;
// This test only expects one error, and that is a kParseError. If there are others,
// there is some unknown problem.
REPORTER_ASSERT_MESSAGE(errorContext->fReporter, 1 == errorContext->fErrors,
"This threw more errors than expected.");
REPORTER_ASSERT_MESSAGE(errorContext->fReporter, kParseError_SkError == error,
SkGetLastErrorString());
}
static void test_bitmap_with_encoded_data(skiatest::Reporter* reporter) {
// Create a bitmap that will be encoded.
SkBitmap original;
make_bm(&original, 100, 100, SK_ColorBLUE, true);
SkDynamicMemoryWStream wStream;
if (!SkImageEncoder::EncodeStream(&wStream, original, SkImageEncoder::kPNG_Type, 100)) {
return;
}
SkAutoDataUnref data(wStream.copyToData());
SkBitmap bm;
bool installSuccess = SkInstallDiscardablePixelRef(
SkDecodingImageGenerator::Create(data, SkDecodingImageGenerator::Options()), &bm, NULL);
REPORTER_ASSERT(reporter, installSuccess);
// Write both bitmaps to pictures, and ensure that the resulting data streams are the same.
// Flattening original will follow the old path of performing an encode, while flattening bm
// will use the already encoded data.
SkAutoDataUnref picture1(serialized_picture_from_bitmap(original));
SkAutoDataUnref picture2(serialized_picture_from_bitmap(bm));
REPORTER_ASSERT(reporter, picture1->equals(picture2));
// Now test that a parse error was generated when trying to create a new SkPicture without
// providing a function to decode the bitmap.
ErrorContext context;
context.fErrors = 0;
context.fReporter = reporter;
SkSetErrorCallback(assert_one_parse_error_cb, &context);
SkMemoryStream pictureStream(picture1);
SkClearLastError();
SkAutoUnref pictureFromStream(SkPicture::CreateFromStream(&pictureStream, NULL));
REPORTER_ASSERT(reporter, pictureFromStream.get() != NULL);
SkClearLastError();
SkSetErrorCallback(NULL, NULL);
}
static void test_clone_empty(skiatest::Reporter* reporter) {
// This is a regression test for crbug.com/172062
// Before the fix, we used to crash accessing a null pointer when we
// had a picture with no paints. This test passes by not crashing.
{
SkPicture picture;
picture.beginRecording(1, 1);
picture.endRecording();
SkPicture* destPicture = picture.clone();
REPORTER_ASSERT(reporter, NULL != destPicture);
destPicture->unref();
}
{
// Test without call to endRecording
SkPicture picture;
picture.beginRecording(1, 1);
SkPicture* destPicture = picture.clone();
REPORTER_ASSERT(reporter, NULL != destPicture);
destPicture->unref();
}
}
static void test_clip_bound_opt(skiatest::Reporter* reporter) {
// Test for crbug.com/229011
SkRect rect1 = SkRect::MakeXYWH(SkIntToScalar(4), SkIntToScalar(4),
SkIntToScalar(2), SkIntToScalar(2));
SkRect rect2 = SkRect::MakeXYWH(SkIntToScalar(7), SkIntToScalar(7),
SkIntToScalar(1), SkIntToScalar(1));
SkRect rect3 = SkRect::MakeXYWH(SkIntToScalar(6), SkIntToScalar(6),
SkIntToScalar(1), SkIntToScalar(1));
SkPath invPath;
invPath.addOval(rect1);
invPath.setFillType(SkPath::kInverseEvenOdd_FillType);
SkPath path;
path.addOval(rect2);
SkPath path2;
path2.addOval(rect3);
SkIRect clipBounds;
// Minimalist test set for 100% code coverage of
// SkPictureRecord::updateClipConservativelyUsingBounds
{
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(10, 10,
SkPicture::kUsePathBoundsForClip_RecordingFlag);
canvas->clipPath(invPath, SkRegion::kIntersect_Op);
bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
REPORTER_ASSERT(reporter, true == nonEmpty);
REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
}
{
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(10, 10,
SkPicture::kUsePathBoundsForClip_RecordingFlag);
canvas->clipPath(path, SkRegion::kIntersect_Op);
canvas->clipPath(invPath, SkRegion::kIntersect_Op);
bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
REPORTER_ASSERT(reporter, true == nonEmpty);
REPORTER_ASSERT(reporter, 7 == clipBounds.fLeft);
REPORTER_ASSERT(reporter, 7 == clipBounds.fTop);
REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
}
{
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(10, 10,
SkPicture::kUsePathBoundsForClip_RecordingFlag);
canvas->clipPath(path, SkRegion::kIntersect_Op);
canvas->clipPath(invPath, SkRegion::kUnion_Op);
bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
REPORTER_ASSERT(reporter, true == nonEmpty);
REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
}
{
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(10, 10,
SkPicture::kUsePathBoundsForClip_RecordingFlag);
canvas->clipPath(path, SkRegion::kDifference_Op);
bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
REPORTER_ASSERT(reporter, true == nonEmpty);
REPORTER_ASSERT(reporter, 0 == clipBounds.fLeft);
REPORTER_ASSERT(reporter, 0 == clipBounds.fTop);
REPORTER_ASSERT(reporter, 10 == clipBounds.fBottom);
REPORTER_ASSERT(reporter, 10 == clipBounds.fRight);
}
{
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(10, 10,
SkPicture::kUsePathBoundsForClip_RecordingFlag);
canvas->clipPath(path, SkRegion::kReverseDifference_Op);
bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
// True clip is actually empty in this case, but the best
// determination we can make using only bounds as input is that the
// clip is included in the bounds of 'path'.
REPORTER_ASSERT(reporter, true == nonEmpty);
REPORTER_ASSERT(reporter, 7 == clipBounds.fLeft);
REPORTER_ASSERT(reporter, 7 == clipBounds.fTop);
REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
}
{
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(10, 10,
SkPicture::kUsePathBoundsForClip_RecordingFlag);
canvas->clipPath(path, SkRegion::kIntersect_Op);
canvas->clipPath(path2, SkRegion::kXOR_Op);
bool nonEmpty = canvas->getClipDeviceBounds(&clipBounds);
REPORTER_ASSERT(reporter, true == nonEmpty);
REPORTER_ASSERT(reporter, 6 == clipBounds.fLeft);
REPORTER_ASSERT(reporter, 6 == clipBounds.fTop);
REPORTER_ASSERT(reporter, 8 == clipBounds.fBottom);
REPORTER_ASSERT(reporter, 8 == clipBounds.fRight);
}
}
/**
* A canvas that records the number of clip commands.
*/
class ClipCountingCanvas : public SkCanvas {
public:
explicit ClipCountingCanvas(int width, int height)
: INHERITED(width, height)
, fClipCount(0){
}
virtual bool clipRect(const SkRect& r, SkRegion::Op op, bool doAA)
SK_OVERRIDE {
fClipCount += 1;
return this->INHERITED::clipRect(r, op, doAA);
}
virtual bool clipRRect(const SkRRect& rrect, SkRegion::Op op, bool doAA)
SK_OVERRIDE {
fClipCount += 1;
return this->INHERITED::clipRRect(rrect, op, doAA);
}
virtual bool clipPath(const SkPath& path, SkRegion::Op op, bool doAA)
SK_OVERRIDE {
fClipCount += 1;
return this->INHERITED::clipPath(path, op, doAA);
}
unsigned getClipCount() const { return fClipCount; }
private:
unsigned fClipCount;
typedef SkCanvas INHERITED;
};
static void test_clip_expansion(skiatest::Reporter* reporter) {
SkPicture picture;
SkCanvas* canvas = picture.beginRecording(10, 10, 0);
canvas->clipRect(SkRect::MakeEmpty(), SkRegion::kReplace_Op);
// The following expanding clip should not be skipped.
canvas->clipRect(SkRect::MakeXYWH(4, 4, 3, 3), SkRegion::kUnion_Op);
// Draw something so the optimizer doesn't just fold the world.
SkPaint p;
p.setColor(SK_ColorBLUE);
canvas->drawPaint(p);
ClipCountingCanvas testCanvas(10, 10);
picture.draw(&testCanvas);
// Both clips should be present on playback.
REPORTER_ASSERT(reporter, testCanvas.getClipCount() == 2);
}
static void test_hierarchical(skiatest::Reporter* reporter) {
SkBitmap bm;
make_bm(&bm, 10, 10, SK_ColorRED, true);
SkCanvas* canvas;
SkPicture childPlain;
childPlain.beginRecording(10, 10);
childPlain.endRecording();
REPORTER_ASSERT(reporter, !childPlain.willPlayBackBitmaps()); // 0
SkPicture childWithBitmap;
childWithBitmap.beginRecording(10, 10)->drawBitmap(bm, 0, 0);
childWithBitmap.endRecording();
REPORTER_ASSERT(reporter, childWithBitmap.willPlayBackBitmaps()); // 1
SkPicture parentPP;
canvas = parentPP.beginRecording(10, 10);
canvas->drawPicture(childPlain);
parentPP.endRecording();
REPORTER_ASSERT(reporter, !parentPP.willPlayBackBitmaps()); // 0
SkPicture parentPWB;
canvas = parentPWB.beginRecording(10, 10);
canvas->drawPicture(childWithBitmap);
parentPWB.endRecording();
REPORTER_ASSERT(reporter, parentPWB.willPlayBackBitmaps()); // 1
SkPicture parentWBP;
canvas = parentWBP.beginRecording(10, 10);
canvas->drawBitmap(bm, 0, 0);
canvas->drawPicture(childPlain);
parentWBP.endRecording();
REPORTER_ASSERT(reporter, parentWBP.willPlayBackBitmaps()); // 1
SkPicture parentWBWB;
canvas = parentWBWB.beginRecording(10, 10);
canvas->drawBitmap(bm, 0, 0);
canvas->drawPicture(childWithBitmap);
parentWBWB.endRecording();
REPORTER_ASSERT(reporter, parentWBWB.willPlayBackBitmaps()); // 2
}
DEF_TEST(Picture, reporter) {
#ifdef SK_DEBUG
test_deleting_empty_playback();
test_serializing_empty_picture();
#else
test_bad_bitmap();
#endif
test_unbalanced_save_restores(reporter);
test_peephole();
test_gatherpixelrefs(reporter);
test_gatherpixelrefsandrects(reporter);
test_bitmap_with_encoded_data(reporter);
test_clone_empty(reporter);
test_clip_bound_opt(reporter);
test_clip_expansion(reporter);
test_hierarchical(reporter);
}
static void draw_bitmaps(const SkBitmap bitmap, SkCanvas* canvas) {
const SkPaint paint;
const SkRect rect = { 5.0f, 5.0f, 8.0f, 8.0f };
const SkIRect irect = { 2, 2, 3, 3 };
// Don't care what these record, as long as they're legal.
canvas->drawBitmap(bitmap, 0.0f, 0.0f, &paint);
canvas->drawBitmapRectToRect(bitmap, &rect, rect, &paint, SkCanvas::kNone_DrawBitmapRectFlag);
canvas->drawBitmapMatrix(bitmap, SkMatrix::I(), &paint);
canvas->drawBitmapNine(bitmap, irect, rect, &paint);
canvas->drawSprite(bitmap, 1, 1);
}
static void test_draw_bitmaps(SkCanvas* canvas) {
SkBitmap empty;
draw_bitmaps(empty, canvas);
empty.setConfig(SkImageInfo::MakeN32Premul(10, 10));
draw_bitmaps(empty, canvas);
}
DEF_TEST(Picture_EmptyBitmap, r) {
SkPicture picture;
test_draw_bitmaps(picture.beginRecording(10, 10));
picture.endRecording();
}
DEF_TEST(Canvas_EmptyBitmap, r) {
SkBitmap dst;
dst.allocN32Pixels(10, 10);
SkCanvas canvas(dst);
test_draw_bitmaps(&canvas);
}
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