151 lines
5.0 KiB
C++
151 lines
5.0 KiB
C++
/*
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* Copyright 2016 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 "SkBitmap.h"
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#include "SkCanvas.h"
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#include "SkImage.h"
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#include "SkSpecialImage.h"
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#include "SkSpecialSurface.h"
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#include "Test.h"
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#if SK_SUPPORT_GPU
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#include "GrContext.h"
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#endif
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class TestingSpecialImageAccess {
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public:
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static const SkIRect& Subset(const SkSpecialImage* img) {
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return img->subset();
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}
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static bool PeekPixels(const SkSpecialImage* img, SkPixmap* pixmap) {
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return img->peekPixels(pixmap);
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}
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static GrTexture* PeekTexture(const SkSpecialImage* img) {
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return img->peekTexture();
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}
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};
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// This test creates backing resources exactly sized to [kFullSize x kFullSize].
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// It then wraps them in an SkSpecialImage with only the center (red) region being active.
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// It then draws the SkSpecialImage to a full sized (all blue) canvas and checks that none
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// of the inactive (green) region leaked out.
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static const int kSmallerSize = 10;
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static const int kPad = 3;
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static const int kFullSize = kSmallerSize + 2 * kPad;
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// Create a bitmap with red in the center and green around it
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static SkBitmap create_bm() {
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SkBitmap bm;
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bm.allocN32Pixels(kFullSize, kFullSize, true);
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SkCanvas temp(bm);
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temp.clear(SK_ColorGREEN);
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SkPaint p;
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p.setColor(SK_ColorRED);
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p.setAntiAlias(false);
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temp.drawRect(SkRect::MakeXYWH(SkIntToScalar(kPad), SkIntToScalar(kPad),
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SkIntToScalar(kSmallerSize), SkIntToScalar(kSmallerSize)),
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p);
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return bm;
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}
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// Basic test of the SkSpecialImage public API (e.g., peekTexture, peekPixels & draw)
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static void test_image(SkSpecialImage* img, skiatest::Reporter* reporter,
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bool peekPixelsSucceeds, bool peekTextureSucceeds) {
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const SkIRect subset = TestingSpecialImageAccess::Subset(img);
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REPORTER_ASSERT(reporter, kPad == subset.left());
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REPORTER_ASSERT(reporter, kPad == subset.top());
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REPORTER_ASSERT(reporter, kSmallerSize == subset.width());
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REPORTER_ASSERT(reporter, kSmallerSize == subset.height());
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//--------------
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REPORTER_ASSERT(reporter, peekTextureSucceeds == !!TestingSpecialImageAccess::PeekTexture(img));
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//--------------
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SkPixmap pixmap;
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REPORTER_ASSERT(reporter, peekPixelsSucceeds ==
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!!TestingSpecialImageAccess::PeekPixels(img, &pixmap));
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if (peekPixelsSucceeds) {
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REPORTER_ASSERT(reporter, kFullSize == pixmap.width());
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REPORTER_ASSERT(reporter, kFullSize == pixmap.height());
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}
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//--------------
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SkImageInfo info = SkImageInfo::MakeN32(kFullSize, kFullSize, kOpaque_SkAlphaType);
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SkAutoTUnref<SkSpecialSurface> surf(img->newSurface(info));
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SkCanvas* canvas = surf->getCanvas();
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canvas->clear(SK_ColorBLUE);
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img->draw(canvas, SkIntToScalar(kPad), SkIntToScalar(kPad), nullptr);
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SkBitmap bm;
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bm.allocN32Pixels(kFullSize, kFullSize, true);
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bool result = canvas->readPixels(bm.info(), bm.getPixels(), bm.rowBytes(), 0, 0);
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SkASSERT_RELEASE(result);
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// Only the center (red) portion should've been drawn into the canvas
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REPORTER_ASSERT(reporter, SK_ColorBLUE == bm.getColor(kPad-1, kPad-1));
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REPORTER_ASSERT(reporter, SK_ColorRED == bm.getColor(kPad, kPad));
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REPORTER_ASSERT(reporter, SK_ColorRED == bm.getColor(kSmallerSize+kPad-1,
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kSmallerSize+kPad-1));
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REPORTER_ASSERT(reporter, SK_ColorBLUE == bm.getColor(kSmallerSize+kPad,
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kSmallerSize+kPad));
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}
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DEF_TEST(SpecialImage_Raster, reporter) {
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SkBitmap bm = create_bm();
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const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
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SkAutoTUnref<SkSpecialImage> img(SkSpecialImage::NewFromRaster(subset, bm));
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test_image(img, reporter, true, false);
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}
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DEF_TEST(SpecialImage_Image, reporter) {
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SkBitmap bm = create_bm();
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SkAutoTUnref<SkImage> fullImage(SkImage::NewFromBitmap(bm));
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const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
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SkAutoTUnref<SkSpecialImage> img(SkSpecialImage::NewFromImage(subset, fullImage));
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test_image(img, reporter, true, false);
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}
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#if SK_SUPPORT_GPU
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DEF_GPUTEST_FOR_RENDERING_CONTEXTS(SpecialImage_Gpu, reporter, context) {
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SkBitmap bm = create_bm();
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GrSurfaceDesc desc;
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desc.fConfig = kSkia8888_GrPixelConfig;
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desc.fFlags = kNone_GrSurfaceFlags;
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desc.fWidth = kFullSize;
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desc.fHeight = kFullSize;
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SkAutoTUnref<GrTexture> texture(context->textureProvider()->createTexture(desc, false,
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bm.getPixels(), 0));
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if (!texture) {
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return;
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}
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const SkIRect& subset = SkIRect::MakeXYWH(kPad, kPad, kSmallerSize, kSmallerSize);
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SkAutoTUnref<SkSpecialImage> img(SkSpecialImage::NewFromGpu(subset, texture));
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test_image(img, reporter, false, true);
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}
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#endif
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