7b8400dad2
This is much more explicit about what that type represents (are we in legacy mode or not), which also makes it suitable for other (upcoming) usage. BUG=skia: GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4529 Change-Id: Iacb397c34e7765f1ca86c0195bc622b2be4d9acf Reviewed-on: https://skia-review.googlesource.com/4529 Commit-Queue: Brian Osman <brianosman@google.com> Reviewed-by: Brian Salomon <bsalomon@google.com>
384 lines
12 KiB
C++
384 lines
12 KiB
C++
/*
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* Copyright 2015 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 "SkImage.h"
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#include "SkImageCacherator.h"
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#include "SkPictureRecorder.h"
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#include "SkSurface.h"
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#if SK_SUPPORT_GPU
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#include "GrContext.h"
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#include "GrTexture.h"
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#include "../src/image/SkImage_Gpu.h"
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#endif
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static void draw_something(SkCanvas* canvas, const SkRect& bounds) {
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SkPaint paint;
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paint.setAntiAlias(true);
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paint.setColor(SK_ColorRED);
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paint.setStyle(SkPaint::kStroke_Style);
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paint.setStrokeWidth(10);
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canvas->drawRect(bounds, paint);
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paint.setStyle(SkPaint::kFill_Style);
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paint.setColor(SK_ColorBLUE);
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canvas->drawOval(bounds, paint);
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}
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/*
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* Exercise drawing pictures inside an image, showing that the image version is pixelated
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* (correctly) when it is inside an image.
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*/
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class ImagePictGM : public skiagm::GM {
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sk_sp<SkPicture> fPicture;
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sk_sp<SkImage> fImage0;
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sk_sp<SkImage> fImage1;
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public:
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ImagePictGM() {}
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protected:
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SkString onShortName() override {
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return SkString("image-picture");
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}
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SkISize onISize() override {
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return SkISize::Make(850, 450);
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}
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void onOnceBeforeDraw() override {
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const SkRect bounds = SkRect::MakeXYWH(100, 100, 100, 100);
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SkPictureRecorder recorder;
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draw_something(recorder.beginRecording(bounds), bounds);
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fPicture = recorder.finishRecordingAsPicture();
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// extract enough just for the oval.
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const SkISize size = SkISize::Make(100, 100);
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SkMatrix matrix;
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matrix.setTranslate(-100, -100);
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fImage0 = SkImage::MakeFromPicture(fPicture, size, &matrix, nullptr);
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matrix.postTranslate(-50, -50);
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matrix.postRotate(45);
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matrix.postTranslate(50, 50);
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fImage1 = SkImage::MakeFromPicture(fPicture, size, &matrix, nullptr);
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}
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void drawSet(SkCanvas* canvas) const {
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SkMatrix matrix = SkMatrix::MakeTrans(-100, -100);
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canvas->drawPicture(fPicture, &matrix, nullptr);
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canvas->drawImage(fImage0.get(), 150, 0);
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canvas->drawImage(fImage1.get(), 300, 0);
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}
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void onDraw(SkCanvas* canvas) override {
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canvas->translate(20, 20);
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this->drawSet(canvas);
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canvas->save();
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canvas->translate(0, 130);
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canvas->scale(0.25f, 0.25f);
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this->drawSet(canvas);
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canvas->restore();
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canvas->save();
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canvas->translate(0, 200);
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canvas->scale(2, 2);
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this->drawSet(canvas);
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canvas->restore();
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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DEF_GM( return new ImagePictGM; )
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///////////////////////////////////////////////////////////////////////////////////////////////////
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static SkImageGenerator* make_pic_generator(GrContext*, SkPicture* pic) {
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SkMatrix matrix;
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matrix.setTranslate(-100, -100);
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return SkImageGenerator::NewFromPicture(SkISize::Make(100, 100), pic, &matrix, nullptr);
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}
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class RasterGenerator : public SkImageGenerator {
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public:
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RasterGenerator(const SkBitmap& bm) : SkImageGenerator(bm.info()), fBM(bm) {
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fBM.lockPixels();
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}
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protected:
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bool onGetPixels(const SkImageInfo& info, void* pixels, size_t rowBytes,
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SkPMColor* ctable, int* ctableCount) override {
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SkASSERT(fBM.width() == info.width());
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SkASSERT(fBM.height() == info.height());
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if (info.colorType() == kIndex_8_SkColorType) {
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if (SkColorTable* ct = fBM.getColorTable()) {
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if (ctable) {
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memcpy(ctable, ct->readColors(), ct->count() * sizeof(SkPMColor));
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}
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if (ctableCount) {
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*ctableCount = ct->count();
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}
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for (int y = 0; y < info.height(); ++y) {
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memcpy(pixels, fBM.getAddr8(0, y), fBM.width());
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pixels = (char*)pixels + rowBytes;
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}
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return true;
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} else {
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return false;
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}
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} else {
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return fBM.readPixels(info, pixels, rowBytes, 0, 0);
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}
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}
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private:
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SkBitmap fBM;
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};
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static SkImageGenerator* make_ras_generator(GrContext*, SkPicture* pic) {
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SkBitmap bm;
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bm.allocN32Pixels(100, 100);
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SkCanvas canvas(bm);
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canvas.clear(0);
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canvas.translate(-100, -100);
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canvas.drawPicture(pic);
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return new RasterGenerator(bm);
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}
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// so we can create a color-table
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static int find_closest(SkPMColor c, const SkPMColor table[], int count) {
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const int cr = SkGetPackedR32(c);
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const int cg = SkGetPackedG32(c);
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const int cb = SkGetPackedB32(c);
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int minDist = 999999999;
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int index = 0;
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for (int i = 0; i < count; ++i) {
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int dr = SkAbs32((int)SkGetPackedR32(table[i]) - cr);
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int dg = SkAbs32((int)SkGetPackedG32(table[i]) - cg);
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int db = SkAbs32((int)SkGetPackedB32(table[i]) - cb);
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int dist = dr + dg + db;
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if (dist < minDist) {
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minDist = dist;
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index = i;
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}
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}
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return index;
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}
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static SkImageGenerator* make_ctable_generator(GrContext*, SkPicture* pic) {
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SkBitmap bm;
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bm.allocN32Pixels(100, 100);
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SkCanvas canvas(bm);
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canvas.clear(0);
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canvas.translate(-100, -100);
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canvas.drawPicture(pic);
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const SkPMColor colors[] = {
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SkPreMultiplyColor(SK_ColorRED),
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SkPreMultiplyColor(0),
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SkPreMultiplyColor(SK_ColorBLUE),
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};
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const int count = SK_ARRAY_COUNT(colors);
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SkImageInfo info = SkImageInfo::Make(100, 100, kIndex_8_SkColorType, kPremul_SkAlphaType);
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SkBitmap bm2;
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sk_sp<SkColorTable> ct(new SkColorTable(colors, count));
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bm2.allocPixels(info, nullptr, ct.get());
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for (int y = 0; y < info.height(); ++y) {
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for (int x = 0; x < info.width(); ++x) {
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*bm2.getAddr8(x, y) = find_closest(*bm.getAddr32(x, y), colors, count);
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}
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}
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return new RasterGenerator(bm2);
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}
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class EmptyGenerator : public SkImageGenerator {
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public:
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EmptyGenerator(const SkImageInfo& info) : SkImageGenerator(info) {}
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};
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#if SK_SUPPORT_GPU
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class TextureGenerator : public SkImageGenerator {
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public:
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TextureGenerator(GrContext* ctx, const SkImageInfo& info, SkPicture* pic)
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: SkImageGenerator(info)
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, fCtx(SkRef(ctx))
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{
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auto surface(SkSurface::MakeRenderTarget(ctx, SkBudgeted::kNo, info));
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if (surface) {
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surface->getCanvas()->clear(0);
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surface->getCanvas()->translate(-100, -100);
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surface->getCanvas()->drawPicture(pic);
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sk_sp<SkImage> image(surface->makeImageSnapshot());
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fTexture.reset(SkRef(as_IB(image)->peekTexture()));
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}
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}
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protected:
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GrTexture* onGenerateTexture(GrContext* ctx, const SkIRect* subset) override {
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if (ctx) {
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SkASSERT(ctx == fCtx.get());
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}
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if (!fTexture) {
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return nullptr;
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}
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if (!subset) {
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return SkRef(fTexture.get());
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}
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// need to copy the subset into a new texture
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GrSurfaceDesc desc = fTexture->desc();
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desc.fWidth = subset->width();
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desc.fHeight = subset->height();
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GrTexture* dst = fCtx->textureProvider()->createTexture(desc, SkBudgeted::kNo);
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fCtx->copySurface(dst, fTexture.get(), *subset, SkIPoint::Make(0, 0));
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return dst;
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}
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private:
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sk_sp<GrContext> fCtx;
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sk_sp<GrTexture> fTexture;
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};
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static SkImageGenerator* make_tex_generator(GrContext* ctx, SkPicture* pic) {
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const SkImageInfo info = SkImageInfo::MakeN32Premul(100, 100);
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if (!ctx) {
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return new EmptyGenerator(info);
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}
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return new TextureGenerator(ctx, info, pic);
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}
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#endif
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class ImageCacheratorGM : public skiagm::GM {
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SkString fName;
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SkImageGenerator* (*fFactory)(GrContext*, SkPicture*);
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sk_sp<SkPicture> fPicture;
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std::unique_ptr<SkImageCacherator> fCache;
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std::unique_ptr<SkImageCacherator> fCacheSubset;
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public:
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ImageCacheratorGM(const char suffix[], SkImageGenerator* (*factory)(GrContext*, SkPicture*))
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: fFactory(factory)
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{
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fName.printf("image-cacherator-from-%s", suffix);
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}
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protected:
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SkString onShortName() override {
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return fName;
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}
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SkISize onISize() override {
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return SkISize::Make(960, 450);
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}
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void onOnceBeforeDraw() override {
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const SkRect bounds = SkRect::MakeXYWH(100, 100, 100, 100);
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SkPictureRecorder recorder;
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draw_something(recorder.beginRecording(bounds), bounds);
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fPicture = recorder.finishRecordingAsPicture();
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}
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void makeCaches(GrContext* ctx) {
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auto gen = fFactory(ctx, fPicture.get());
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SkDEBUGCODE(const uint32_t genID = gen->uniqueID();)
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fCache.reset(SkImageCacherator::NewFromGenerator(gen));
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const SkIRect subset = SkIRect::MakeLTRB(50, 50, 100, 100);
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gen = fFactory(ctx, fPicture.get());
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SkDEBUGCODE(const uint32_t genSubsetID = gen->uniqueID();)
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fCacheSubset.reset(SkImageCacherator::NewFromGenerator(gen, &subset));
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// whole caches should have the same ID as the generator. Subsets should be diff
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SkASSERT(fCache->uniqueID() == genID);
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SkASSERT(fCacheSubset->uniqueID() != genID);
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SkASSERT(fCacheSubset->uniqueID() != genSubsetID);
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SkASSERT(fCache->info().dimensions() == SkISize::Make(100, 100));
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SkASSERT(fCacheSubset->info().dimensions() == SkISize::Make(50, 50));
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}
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static void draw_as_bitmap(SkCanvas* canvas, SkImageCacherator* cache, SkScalar x, SkScalar y) {
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SkBitmap bitmap;
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cache->lockAsBitmap(&bitmap, nullptr);
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canvas->drawBitmap(bitmap, x, y);
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}
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static void draw_as_tex(SkCanvas* canvas, SkImageCacherator* cache, SkScalar x, SkScalar y) {
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#if SK_SUPPORT_GPU
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sk_sp<GrTexture> texture(
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cache->lockAsTexture(canvas->getGrContext(), GrTextureParams::ClampBilerp(),
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SkDestinationSurfaceColorMode::kGammaAndColorSpaceAware, nullptr));
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if (!texture) {
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// show placeholder if we have no texture
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SkPaint paint;
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paint.setStyle(SkPaint::kStroke_Style);
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SkRect r = SkRect::MakeXYWH(x, y, SkIntToScalar(cache->info().width()),
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SkIntToScalar(cache->info().width()));
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canvas->drawRect(r, paint);
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canvas->drawLine(r.left(), r.top(), r.right(), r.bottom(), paint);
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canvas->drawLine(r.left(), r.bottom(), r.right(), r.top(), paint);
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return;
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}
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// No API to draw a GrTexture directly, so we cheat and create a private image subclass
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sk_sp<SkImage> image(new SkImage_Gpu(cache->info().width(), cache->info().height(),
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cache->uniqueID(), kPremul_SkAlphaType,
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std::move(texture),
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sk_ref_sp(cache->info().colorSpace()),
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SkBudgeted::kNo));
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canvas->drawImage(image.get(), x, y);
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#endif
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}
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void drawSet(SkCanvas* canvas) const {
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SkMatrix matrix = SkMatrix::MakeTrans(-100, -100);
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canvas->drawPicture(fPicture, &matrix, nullptr);
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// Draw the tex first, so it doesn't hit a lucky cache from the raster version. This
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// way we also can force the generateTexture call.
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draw_as_tex(canvas, fCache.get(), 310, 0);
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draw_as_tex(canvas, fCacheSubset.get(), 310+101, 0);
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draw_as_bitmap(canvas, fCache.get(), 150, 0);
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draw_as_bitmap(canvas, fCacheSubset.get(), 150+101, 0);
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}
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void onDraw(SkCanvas* canvas) override {
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this->makeCaches(canvas->getGrContext());
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canvas->translate(20, 20);
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this->drawSet(canvas);
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canvas->save();
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canvas->translate(0, 130);
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canvas->scale(0.25f, 0.25f);
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this->drawSet(canvas);
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canvas->restore();
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canvas->save();
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canvas->translate(0, 200);
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canvas->scale(2, 2);
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this->drawSet(canvas);
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canvas->restore();
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}
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private:
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typedef skiagm::GM INHERITED;
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};
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DEF_GM( return new ImageCacheratorGM("picture", make_pic_generator); )
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DEF_GM( return new ImageCacheratorGM("raster", make_ras_generator); )
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DEF_GM( return new ImageCacheratorGM("ctable", make_ctable_generator); )
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#if SK_SUPPORT_GPU
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DEF_GM( return new ImageCacheratorGM("texture", make_tex_generator); )
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#endif
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