skia2/gm/bleed.cpp
reed a5517e2b19 add src-rect-constraint to drawImageRect
Follow-on work
- unify around SrcRectConstraint (i.e. drawBitmapRect)
- remove silly drawBitmapRectToRect alias
- clean-up (possibly remove) alias problems around drawBitmapRect + IRect parameter

BUG=skia:

Review URL: https://codereview.chromium.org/1228083004
2015-07-14 10:54:12 -07:00

290 lines
12 KiB
C++

/*
* Copyright 2013 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "gm.h"
#include "SkBlurMask.h"
#include "SkBlurMaskFilter.h"
#include "SkCanvas.h"
#include "SkImage.h"
#if SK_SUPPORT_GPU
#include "GrContext.h"
#include "GrContextOptions.h"
#endif
static void draw_bitmap_rect(SkCanvas* canvas, const SkBitmap& bitmap, const SkImage*,
const SkRect* src, const SkRect& dst,
const SkPaint* paint, SkCanvas::SrcRectConstraint constraint) {
canvas->drawBitmapRect(bitmap, src, dst, paint, constraint);
}
static void draw_image_rect(SkCanvas* canvas, const SkBitmap&, const SkImage* image,
const SkRect* src, const SkRect& dst,
const SkPaint* paint, SkCanvas::SrcRectConstraint constraint) {
canvas->drawImageRect(image, src, dst, paint, constraint);
}
enum BleedTest {
kUseBitmap_BleedTest,
kUseImage_BleedTest,
};
const struct {
const char* fName;
void (*fDraw)(SkCanvas*, const SkBitmap&, const SkImage*, const SkRect*, const SkRect&,
const SkPaint*, SkCanvas::SrcRectConstraint);
} gBleedRec[] = {
{ "bleed", draw_bitmap_rect },
{ "bleed_image", draw_image_rect },
};
// Create a black&white checked texture with 2 1-pixel rings
// around the outside edge. The inner ring is red and the outer ring is blue.
static void make_ringed_bitmap(SkBitmap* result, int width, int height) {
SkASSERT(0 == width % 2 && 0 == height % 2);
static const SkPMColor kRed = SkPreMultiplyColor(SK_ColorRED);
static const SkPMColor kBlue = SkPreMultiplyColor(SK_ColorBLUE);
static const SkPMColor kBlack = SkPreMultiplyColor(SK_ColorBLACK);
static const SkPMColor kWhite = SkPreMultiplyColor(SK_ColorWHITE);
result->allocN32Pixels(width, height, true);
SkPMColor* scanline = result->getAddr32(0, 0);
for (int x = 0; x < width; ++x) {
scanline[x] = kBlue;
}
scanline = result->getAddr32(0, 1);
scanline[0] = kBlue;
for (int x = 1; x < width - 1; ++x) {
scanline[x] = kRed;
}
scanline[width-1] = kBlue;
for (int y = 2; y < height/2; ++y) {
scanline = result->getAddr32(0, y);
scanline[0] = kBlue;
scanline[1] = kRed;
for (int x = 2; x < width/2; ++x) {
scanline[x] = kBlack;
}
for (int x = width/2; x < width-2; ++x) {
scanline[x] = kWhite;
}
scanline[width-2] = kRed;
scanline[width-1] = kBlue;
}
for (int y = height/2; y < height-2; ++y) {
scanline = result->getAddr32(0, y);
scanline[0] = kBlue;
scanline[1] = kRed;
for (int x = 2; x < width/2; ++x) {
scanline[x] = kWhite;
}
for (int x = width/2; x < width-2; ++x) {
scanline[x] = kBlack;
}
scanline[width-2] = kRed;
scanline[width-1] = kBlue;
}
scanline = result->getAddr32(0, height-2);
scanline[0] = kBlue;
for (int x = 1; x < width - 1; ++x) {
scanline[x] = kRed;
}
scanline[width-1] = kBlue;
scanline = result->getAddr32(0, height-1);
for (int x = 0; x < width; ++x) {
scanline[x] = kBlue;
}
result->setImmutable();
}
// This GM exercises the drawBitmapRect constraints
class BleedGM : public skiagm::GM {
public:
BleedGM(BleedTest bt) : fBT(bt) {}
protected:
SkString onShortName() override {
return SkString(gBleedRec[fBT].fName);
}
SkISize onISize() override {
return SkISize::Make(kWidth, 780);
}
void onOnceBeforeDraw() override {
make_ringed_bitmap(&fBitmapSmall, kSmallTextureSize, kSmallTextureSize);
fImageSmall.reset(SkImage::NewFromBitmap(fBitmapSmall));
// To exercise the GPU's tiling path we need a texture
// too big for the GPU to handle in one go
make_ringed_bitmap(&fBitmapBig, 2*kMaxTextureSize, 2*kMaxTextureSize);
fImageBig.reset(SkImage::NewFromBitmap(fBitmapBig));
}
// Draw only the center of the small bitmap
void drawCase1(SkCanvas* canvas, int transX, int transY,
SkCanvas::SrcRectConstraint constraint, SkFilterQuality filter) {
SkRect src = SkRect::MakeXYWH(2, 2,
SkIntToScalar(kSmallTextureSize-4),
SkIntToScalar(kSmallTextureSize-4));
SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
SkPaint paint;
paint.setFilterQuality(filter);
gBleedRec[fBT].fDraw(canvas, fBitmapSmall, fImageSmall, &src, dst, &paint, constraint);
}
// Draw almost all of the large bitmap
void drawCase2(SkCanvas* canvas, int transX, int transY,
SkCanvas::SrcRectConstraint constraint, SkFilterQuality filter) {
SkRect src = SkRect::MakeXYWH(2, 2,
SkIntToScalar(fBitmapBig.width()-4),
SkIntToScalar(fBitmapBig.height()-4));
SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
SkPaint paint;
paint.setFilterQuality(filter);
gBleedRec[fBT].fDraw(canvas, fBitmapBig, fImageBig, &src, dst, &paint, constraint);
}
// Draw ~1/4 of the large bitmap
void drawCase3(SkCanvas* canvas, int transX, int transY,
SkCanvas::SrcRectConstraint constraint, SkFilterQuality filter) {
SkRect src = SkRect::MakeXYWH(2, 2,
SkIntToScalar(fBitmapBig.width()/2-2),
SkIntToScalar(fBitmapBig.height()/2-2));
SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
SkPaint paint;
paint.setFilterQuality(filter);
gBleedRec[fBT].fDraw(canvas, fBitmapBig, fImageBig, &src, dst, &paint, constraint);
}
// Draw the center of the small bitmap with a mask filter
void drawCase4(SkCanvas* canvas, int transX, int transY,
SkCanvas::SrcRectConstraint constraint, SkFilterQuality filter) {
SkRect src = SkRect::MakeXYWH(2, 2,
SkIntToScalar(kSmallTextureSize-4),
SkIntToScalar(kSmallTextureSize-4));
SkRect dst = SkRect::MakeXYWH(SkIntToScalar(transX), SkIntToScalar(transY),
SkIntToScalar(kBlockSize), SkIntToScalar(kBlockSize));
SkPaint paint;
paint.setFilterQuality(filter);
SkMaskFilter* mf = SkBlurMaskFilter::Create(kNormal_SkBlurStyle,
SkBlurMask::ConvertRadiusToSigma(3));
paint.setMaskFilter(mf)->unref();
gBleedRec[fBT].fDraw(canvas, fBitmapSmall, fImageSmall, &src, dst, &paint, constraint);
}
void onDraw(SkCanvas* canvas) override {
canvas->clear(SK_ColorGRAY);
for (int m = 0; m < 2; ++m) {
canvas->save();
if (m) {
static const SkScalar kBottom = SkIntToScalar(kRow3Y + kBlockSize + kBlockSpacing);
canvas->translate(0, kBottom);
SkMatrix rotate;
rotate.setRotate(15.f, 0, kBottom + kBlockSpacing);
canvas->concat(rotate);
canvas->scale(0.71f, 1.22f);
}
// First draw a column with no bleeding and no filtering
this->drawCase1(canvas, kCol0X, kRow0Y, SkCanvas::kStrict_SrcRectConstraint, kNone_SkFilterQuality);
this->drawCase2(canvas, kCol0X, kRow1Y, SkCanvas::kStrict_SrcRectConstraint, kNone_SkFilterQuality);
this->drawCase3(canvas, kCol0X, kRow2Y, SkCanvas::kStrict_SrcRectConstraint, kNone_SkFilterQuality);
this->drawCase4(canvas, kCol0X, kRow3Y, SkCanvas::kStrict_SrcRectConstraint, kNone_SkFilterQuality);
// Then draw a column with no bleeding and low filtering
this->drawCase1(canvas, kCol1X, kRow0Y, SkCanvas::kStrict_SrcRectConstraint, kLow_SkFilterQuality);
this->drawCase2(canvas, kCol1X, kRow1Y, SkCanvas::kStrict_SrcRectConstraint, kLow_SkFilterQuality);
this->drawCase3(canvas, kCol1X, kRow2Y, SkCanvas::kStrict_SrcRectConstraint, kLow_SkFilterQuality);
this->drawCase4(canvas, kCol1X, kRow3Y, SkCanvas::kStrict_SrcRectConstraint, kLow_SkFilterQuality);
// Then draw a column with no bleeding and high filtering
this->drawCase1(canvas, kCol2X, kRow0Y, SkCanvas::kStrict_SrcRectConstraint, kHigh_SkFilterQuality);
this->drawCase2(canvas, kCol2X, kRow1Y, SkCanvas::kStrict_SrcRectConstraint, kHigh_SkFilterQuality);
this->drawCase3(canvas, kCol2X, kRow2Y, SkCanvas::kStrict_SrcRectConstraint, kHigh_SkFilterQuality);
this->drawCase4(canvas, kCol2X, kRow3Y, SkCanvas::kStrict_SrcRectConstraint, kHigh_SkFilterQuality);
// Then draw a column with bleeding and no filtering (bleed should have no effect w/out blur)
this->drawCase1(canvas, kCol3X, kRow0Y, SkCanvas::kFast_SrcRectConstraint, kNone_SkFilterQuality);
this->drawCase2(canvas, kCol3X, kRow1Y, SkCanvas::kFast_SrcRectConstraint, kNone_SkFilterQuality);
this->drawCase3(canvas, kCol3X, kRow2Y, SkCanvas::kFast_SrcRectConstraint, kNone_SkFilterQuality);
this->drawCase4(canvas, kCol3X, kRow3Y, SkCanvas::kFast_SrcRectConstraint, kNone_SkFilterQuality);
// Then draw a column with bleeding and low filtering
this->drawCase1(canvas, kCol4X, kRow0Y, SkCanvas::kFast_SrcRectConstraint, kLow_SkFilterQuality);
this->drawCase2(canvas, kCol4X, kRow1Y, SkCanvas::kFast_SrcRectConstraint, kLow_SkFilterQuality);
this->drawCase3(canvas, kCol4X, kRow2Y, SkCanvas::kFast_SrcRectConstraint, kLow_SkFilterQuality);
this->drawCase4(canvas, kCol4X, kRow3Y, SkCanvas::kFast_SrcRectConstraint, kLow_SkFilterQuality);
// Finally draw a column with bleeding and high filtering
this->drawCase1(canvas, kCol5X, kRow0Y, SkCanvas::kFast_SrcRectConstraint, kHigh_SkFilterQuality);
this->drawCase2(canvas, kCol5X, kRow1Y, SkCanvas::kFast_SrcRectConstraint, kHigh_SkFilterQuality);
this->drawCase3(canvas, kCol5X, kRow2Y, SkCanvas::kFast_SrcRectConstraint, kHigh_SkFilterQuality);
this->drawCase4(canvas, kCol5X, kRow3Y, SkCanvas::kFast_SrcRectConstraint, kHigh_SkFilterQuality);
canvas->restore();
}
}
#if SK_SUPPORT_GPU
void modifyGrContextOptions(GrContextOptions* options) override {
options->fMaxTextureSizeOverride = kMaxTextureSize;
}
#endif
private:
static const int kBlockSize = 70;
static const int kBlockSpacing = 5;
static const int kCol0X = kBlockSpacing;
static const int kCol1X = 2*kBlockSpacing + kBlockSize;
static const int kCol2X = 3*kBlockSpacing + 2*kBlockSize;
static const int kCol3X = 4*kBlockSpacing + 3*kBlockSize;
static const int kCol4X = 5*kBlockSpacing + 4*kBlockSize;
static const int kCol5X = 6*kBlockSpacing + 5*kBlockSize;
static const int kWidth = 7*kBlockSpacing + 6*kBlockSize;
static const int kRow0Y = kBlockSpacing;
static const int kRow1Y = 2*kBlockSpacing + kBlockSize;
static const int kRow2Y = 3*kBlockSpacing + 2*kBlockSize;
static const int kRow3Y = 4*kBlockSpacing + 3*kBlockSize;
static const int kSmallTextureSize = 6;
static const int kMaxTextureSize = 32;
SkBitmap fBitmapSmall;
SkBitmap fBitmapBig;
SkAutoTUnref<SkImage> fImageSmall;
SkAutoTUnref<SkImage> fImageBig;
const BleedTest fBT;
typedef GM INHERITED;
};
DEF_GM( return new BleedGM(kUseBitmap_BleedTest); )
DEF_GM( return new BleedGM(kUseImage_BleedTest); )