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skia2/gm/lattice.cpp
Mike Reed 46596ae505 use tool_utils to encapsulate checking for recording canvas and makeSurface 
Bug: skia:
Change-Id: Ia93ee09dd213b8d6ad5c18e887add5ff3448c824
Reviewed-on: https://skia-review.googlesource.com/90243
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
2018-01-02 21:06:41 +00:00

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/*
* Copyright 2016 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 "SkSurface.h"
#include "sk_tool_utils.h"
static sk_sp<SkSurface> make_surface(SkCanvas* root, int N, int padLeft, int padTop,
int padRight, int padBottom) {
SkImageInfo info = SkImageInfo::MakeN32Premul(N + padLeft + padRight, N + padTop + padBottom);
return sk_tool_utils::makeSurface(root, info);
}
static sk_sp<SkImage> make_image(SkCanvas* root, int* xDivs, int* yDivs, int padLeft, int padTop,
int padRight, int padBottom) {
const int kCap = 28;
const int kMid = 8;
const int kSize = 2*kCap + 3*kMid;
auto surface(make_surface(root, kSize, padLeft, padTop, padRight, padBottom));
SkCanvas* canvas = surface->getCanvas();
canvas->translate((float) padLeft, (float) padTop);
SkRect r = SkRect::MakeWH(SkIntToScalar(kSize), SkIntToScalar(kSize));
const SkScalar strokeWidth = SkIntToScalar(6);
const SkScalar radius = SkIntToScalar(kCap) - strokeWidth/2;
xDivs[0] = kCap + padLeft;
yDivs[0] = kCap + padTop;
xDivs[1] = kCap + kMid + padLeft;
yDivs[1] = kCap + kMid + padTop;
xDivs[2] = kCap + 2 * kMid + padLeft;
yDivs[2] = kCap + 2 * kMid + padTop;
xDivs[3] = kCap + 3 * kMid + padLeft;
yDivs[3] = kCap + 3 * kMid + padTop;
SkPaint paint;
paint.setAntiAlias(true);
paint.setColor(0xFFFFFF00);
canvas->drawRoundRect(r, radius, radius, paint);
r.setXYWH(SkIntToScalar(kCap), 0, SkIntToScalar(kMid), SkIntToScalar(kSize));
paint.setColor(0x8800FF00);
canvas->drawRect(r, paint);
r.setXYWH(SkIntToScalar(kCap + kMid), 0, SkIntToScalar(kMid), SkIntToScalar(kSize));
paint.setColor(0x880000FF);
canvas->drawRect(r, paint);
r.setXYWH(SkIntToScalar(kCap + 2*kMid), 0, SkIntToScalar(kMid), SkIntToScalar(kSize));
paint.setColor(0x88FF00FF);
canvas->drawRect(r, paint);
r.setXYWH(0, SkIntToScalar(kCap), SkIntToScalar(kSize), SkIntToScalar(kMid));
paint.setColor(0x8800FF00);
canvas->drawRect(r, paint);
r.setXYWH(0, SkIntToScalar(kCap + kMid), SkIntToScalar(kSize), SkIntToScalar(kMid));
paint.setColor(0x880000FF);
canvas->drawRect(r, paint);
r.setXYWH(0, SkIntToScalar(kCap + 2*kMid), SkIntToScalar(kSize), SkIntToScalar(kMid));
paint.setColor(0x88FF00FF);
canvas->drawRect(r, paint);
return surface->makeImageSnapshot();
}
static void image_to_bitmap(const SkImage* image, SkBitmap* bm) {
SkImageInfo info = SkImageInfo::MakeN32Premul(image->width(), image->height());
bm->allocPixels(info);
image->readPixels(info, bm->getPixels(), bm->rowBytes(), 0, 0);
}
/**
* This is similar to NinePatchStretchGM, but it also tests "ninepatch" images with more
* than nine patches.
*/
class LatticeGM : public skiagm::GM {
public:
LatticeGM() {}
protected:
SkString onShortName() override {
return SkString("lattice");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
void onDrawHelper(SkCanvas* canvas, int padLeft, int padTop, int padRight, int padBottom) {
canvas->save();
int xDivs[5];
int yDivs[5];
xDivs[0] = padLeft;
yDivs[0] = padTop;
SkBitmap bitmap;
sk_sp<SkImage> image = make_image(canvas, xDivs + 1, yDivs + 1, padLeft, padTop,
padRight, padBottom);
image_to_bitmap(image.get(), &bitmap);
const SkSize size[] = {
{ 50, 50, }, // shrink in both axes
{ 50, 200, }, // shrink in X
{ 200, 50, }, // shrink in Y
{ 200, 200, },
};
canvas->drawImage(image, 10, 10, nullptr);
SkScalar x = SkIntToScalar(100);
SkScalar y = SkIntToScalar(100);
SkCanvas::Lattice lattice;
lattice.fXCount = 4;
lattice.fXDivs = xDivs + 1;
lattice.fYCount = 4;
lattice.fYDivs = yDivs + 1;
lattice.fRectTypes = nullptr;
lattice.fColors = nullptr;
SkIRect bounds = SkIRect::MakeLTRB(padLeft, padTop,
image->width() - padRight, image->height() - padBottom);
lattice.fBounds = (bounds == SkIRect::MakeWH(image->width(), image->height())) ?
nullptr : &bounds;
for (int iy = 0; iy < 2; ++iy) {
for (int ix = 0; ix < 2; ++ix) {
int i = ix * 2 + iy;
SkRect r = SkRect::MakeXYWH(x + ix * 60, y + iy * 60,
size[i].width(), size[i].height());
canvas->drawBitmapLattice(bitmap, lattice, r);
}
}
// Provide hints about 3 solid color rects. These colors match
// what was already in the bitmap.
int fixedColorX[3] = {2, 4, 1};
int fixedColorY[3] = {1, 1, 2};
SkColor fixedColor[3] = {SK_ColorBLACK, SK_ColorBLACK, SK_ColorBLACK};
const SkImageInfo info = SkImageInfo::Make(1, 1, kBGRA_8888_SkColorType,
kUnpremul_SkAlphaType);
for (int rectNum = 0; rectNum < 3; rectNum++) {
int srcX = xDivs[fixedColorX[rectNum]-1];
int srcY = yDivs[fixedColorY[rectNum]-1];
image->readPixels(info, &fixedColor[rectNum], 4, srcX, srcY);
}
// Include the degenerate first div. While normally the first patch is "scalable",
// this will mean that the first non-degenerate patch is "fixed".
lattice.fXCount = 5;
lattice.fXDivs = xDivs;
lattice.fYCount = 5;
lattice.fYDivs = yDivs;
// Let's skip a few rects.
SkCanvas::Lattice::RectType flags[36];
sk_bzero(flags, 36 * sizeof(SkCanvas::Lattice::RectType));
flags[4] = SkCanvas::Lattice::kTransparent;
flags[9] = SkCanvas::Lattice::kTransparent;
flags[12] = SkCanvas::Lattice::kTransparent;
flags[19] = SkCanvas::Lattice::kTransparent;
for (int rectNum = 0; rectNum < 3; rectNum++) {
flags[fixedColorY[rectNum]*6 + fixedColorX[rectNum]]
= SkCanvas::Lattice::kFixedColor;
}
lattice.fRectTypes = flags;
SkColor colors[36];
sk_bzero(colors, 36 * sizeof(SkColor));
for (int rectNum = 0; rectNum < 3; rectNum++) {
colors[fixedColorY[rectNum]*6 + fixedColorX[rectNum]]
= fixedColor[rectNum];
}
lattice.fColors = colors;
canvas->translate(400, 0);
for (int iy = 0; iy < 2; ++iy) {
for (int ix = 0; ix < 2; ++ix) {
int i = ix * 2 + iy;
SkRect r = SkRect::MakeXYWH(x + ix * 60, y + iy * 60,
size[i].width(), size[i].height());
canvas->drawImageLattice(image.get(), lattice, r);
}
}
canvas->restore();
}
void onDraw(SkCanvas* canvas) override {
this->onDrawHelper(canvas, 0, 0, 0, 0);
canvas->translate(0.0f, 400.0f);
this->onDrawHelper(canvas, 3, 7, 4, 11);
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new LatticeGM; )
// LatticeGM2 exercises code paths that draw fixed color and 1x1 rectangles.
class LatticeGM2 : public skiagm::GM {
public:
LatticeGM2() {}
SkString onShortName() override {
return SkString("lattice2");
}
SkISize onISize() override {
return SkISize::Make(800, 800);
}
sk_sp<SkImage> makeImage(SkCanvas* root, int padLeft, int padTop, int padRight, int padBottom) {
const int kSize = 80;
auto surface(make_surface(root, kSize, padLeft, padTop, padRight, padBottom));
SkCanvas* canvas = surface->getCanvas();;
SkPaint paint;
paint.setAntiAlias(false);
SkRect r;
//first line
r.setXYWH(0, 0, 4, 1); //4x1 green rect
paint.setColor(0xFF00FF00);
canvas->drawRect(r, paint);
r.setXYWH(4, 0, 1, 1); //1x1 blue pixel -> draws as rectangle
paint.setColor(0xFF0000FF);
canvas->drawRect(r, paint);
r.setXYWH(5, 0, kSize-5, 1); //the rest of the line is red
paint.setColor(0xFFFF0000);
canvas->drawRect(r, paint);
//second line -> draws as fixed color rectangles
r.setXYWH(0, 1, 4, 1); //4x1 red rect
paint.setColor(0xFFFF0000);
canvas->drawRect(r, paint);
r.setXYWH(4, 1, 1, 1); //1x1 blue pixel with alpha
paint.setColor(0x880000FF);
canvas->drawRect(r, paint);
r.setXYWH(5, 1, kSize-5, 1); //the rest of the line is green
paint.setColor(0xFF00FF00);
canvas->drawRect(r, paint);
//third line - does not draw, because it is transparent
r.setXYWH(0, 2, 4, kSize-2); //4x78 green rect
paint.setColor(0xFF00FF00);
canvas->drawRect(r, paint);
r.setXYWH(4, 2, 1, kSize-2); //1x78 red pixel with alpha
paint.setColor(0x88FF0000);
canvas->drawRect(r, paint);
r.setXYWH(5, 2, kSize-5, kSize-2); //the rest of the image is blue
paint.setColor(0xFF0000FF);
canvas->drawRect(r, paint);
return surface->makeImageSnapshot();
}
void onDrawHelper(SkCanvas* canvas, int padLeft, int padTop, int padRight, int padBottom,
SkPaint& paint) {
int xDivs[2] = {4, 5};
int yDivs[2] = {1, 2};
canvas->save();
sk_sp<SkImage> image = makeImage(canvas, padLeft, padTop, padRight, padBottom);
canvas->drawImage(image, 10, 10, nullptr);
SkCanvas::Lattice lattice;
lattice.fXCount = 2;
lattice.fXDivs = xDivs;
lattice.fYCount = 2;
lattice.fYDivs = yDivs;
lattice.fBounds = nullptr;
SkCanvas::Lattice::RectType flags[9];
sk_bzero(flags, 9 * sizeof(SkCanvas::Lattice::RectType));
flags[3] = SkCanvas::Lattice::kFixedColor;
flags[4] = SkCanvas::Lattice::kFixedColor;
flags[5] = SkCanvas::Lattice::kFixedColor;
flags[6] = SkCanvas::Lattice::kTransparent;
flags[7] = SkCanvas::Lattice::kTransparent;
flags[8] = SkCanvas::Lattice::kTransparent;
lattice.fRectTypes = flags;
SkColor colors[9] = {SK_ColorBLACK, SK_ColorBLACK, SK_ColorBLACK,
0xFFFF0000, 0x880000FF, 0xFF00FF00,
SK_ColorBLACK, SK_ColorBLACK, SK_ColorBLACK};
lattice.fColors = colors;
paint.setColor(0xFFFFFFFF);
canvas->drawImageLattice(image.get(), lattice,
SkRect::MakeXYWH(100, 100, 200, 200), &paint);
//draw the same content with alpha
canvas->translate(400, 0);
paint.setColor(0x80000FFF);
canvas->drawImageLattice(image.get(), lattice,
SkRect::MakeXYWH(100, 100, 200, 200), &paint);
canvas->restore();
}
void onDraw(SkCanvas* canvas) override {
//draw a rectangle in the background with transparent pixels
SkPaint paint;
paint.setColor(0x7F123456);
paint.setBlendMode(SkBlendMode::kSrc);
canvas->drawRect( SkRect::MakeXYWH(300, 0, 300, 800), paint);
//draw image lattice with kSrcOver blending
paint.setBlendMode(SkBlendMode::kSrcOver);
this->onDrawHelper(canvas, 0, 0, 0, 0, paint);
//draw image lattice with kSrcATop blending
canvas->translate(0.0f, 400.0f);
paint.setBlendMode(SkBlendMode::kSrcATop);
this->onDrawHelper(canvas, 0, 0, 0, 0, paint);
}
private:
typedef skiagm::GM INHERITED;
};
DEF_GM( return new LatticeGM2; )
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