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      1 /*
      2  * Copyright 2014 Google Inc.
      3  *
      4  * Use of this source code is governed by a BSD-style license that can be
      5  * found in the LICENSE file.
      6  */
      7 
      8 #include "SkTypes.h"
      9 #include "Resources.h"
     10 #include "Test.h"
     11 
     12 #include "GrContext.h"
     13 #include "SkCanvas.h"
     14 #include "SkImage.h"
     15 #include "SkSurface.h"
     16 #include "SkReadBuffer.h"
     17 #include "SkWriteBuffer.h"
     18 
     19 static void check_isopaque(skiatest::Reporter* reporter, const sk_sp<SkSurface>& surface,
     20                            bool expectedOpaque) {
     21     sk_sp<SkImage> image(surface->makeImageSnapshot());
     22     REPORTER_ASSERT(reporter, image->isOpaque() == expectedOpaque);
     23 }
     24 
     25 DEF_TEST(ImageIsOpaqueTest, reporter) {
     26     SkImageInfo infoTransparent = SkImageInfo::MakeN32Premul(5, 5);
     27     auto surfaceTransparent(SkSurface::MakeRaster(infoTransparent));
     28     check_isopaque(reporter, surfaceTransparent, false);
     29 
     30     SkImageInfo infoOpaque = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
     31     auto surfaceOpaque(SkSurface::MakeRaster(infoOpaque));
     32     check_isopaque(reporter, surfaceOpaque, true);
     33 }
     34 
     35 DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ImageIsOpaqueTest_Gpu, reporter, ctxInfo) {
     36     GrContext* context = ctxInfo.grContext();
     37     SkImageInfo infoTransparent = SkImageInfo::MakeN32Premul(5, 5);
     38     auto surfaceTransparent(SkSurface::MakeRenderTarget(context, SkBudgeted::kNo, infoTransparent));
     39     check_isopaque(reporter, surfaceTransparent, false);
     40 
     41     SkImageInfo infoOpaque = SkImageInfo::MakeN32(5, 5, kOpaque_SkAlphaType);
     42     auto surfaceOpaque(SkSurface::MakeRenderTarget(context,SkBudgeted::kNo, infoOpaque));
     43 
     44     check_isopaque(reporter, surfaceOpaque, true);
     45 }
     46 
     47 ///////////////////////////////////////////////////////////////////////////////////////////////////
     48 #include "SkPictureRecorder.h"
     49 
     50 static sk_sp<SkPicture> make_picture() {
     51     SkPictureRecorder recorder;
     52     SkCanvas* canvas = recorder.beginRecording({ 0, 0, 10, 10 });
     53     canvas->drawColor(SK_ColorRED);
     54     return recorder.finishRecordingAsPicture();
     55 }
     56 
     57 DEF_TEST(Image_isAlphaOnly, reporter) {
     58     SkPMColor pmColors = 0;
     59     SkPixmap pmap = {
     60         SkImageInfo::MakeN32Premul(1, 1),
     61         &pmColors,
     62         sizeof(pmColors)
     63     };
     64     for (auto& image : {
     65         SkImage::MakeRasterCopy(pmap),
     66         GetResourceAsImage("images/mandrill_128.png"),
     67         GetResourceAsImage("images/color_wheel.jpg"),
     68         SkImage::MakeFromPicture(make_picture(), { 10, 10 }, nullptr, nullptr,
     69                                  SkImage::BitDepth::kU8,
     70                                  SkColorSpace::MakeSRGB()),
     71     })
     72     {
     73         REPORTER_ASSERT(reporter, image->isAlphaOnly() == false);
     74     }
     75 
     76     REPORTER_ASSERT(reporter, SkImage::MakeRasterCopy({
     77         SkImageInfo::MakeA8(1, 1), (uint8_t*)&pmColors, 1})->isAlphaOnly() == true);
     78 }
     79