1 /* 2 * Copyright 2019 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 "gm/gm.h" 9 #include "include/core/SkCanvas.h" 10 #include "include/core/SkFilterQuality.h" 11 #include "include/core/SkImage.h" 12 #include "include/core/SkPaint.h" 13 #include "include/core/SkRect.h" 14 #include "include/core/SkRefCnt.h" 15 #include "include/core/SkScalar.h" 16 #include "tools/Resources.h" 17 18 DEF_SIMPLE_GM(skbug_8664, canvas, 830, 550) { 19 const struct { 20 SkScalar fSx, fSy, fTx, fTy; 21 } xforms[] = { 22 { 1, 1, 0, 0 }, 23 { 0.5f, 0.5f, 530, 0 }, 24 { 0.25f, 0.25f, 530, 275 }, 25 { 0.125f, 0.125f, 530, 420 }, 26 }; 27 28 SkPaint imagePaint; 29 // Must be at least medium to require mipmaps when we downscale the image 30 imagePaint.setFilterQuality(kMedium_SkFilterQuality); 31 sk_sp<SkImage> image(GetResourceAsImage("images/mandrill_512.png")); 32 33 SkPaint overlayPaint; 34 overlayPaint.setColor(0x80FFFFFF); 35 36 // Make the overlay visible even when the downscaled images fail to render 37 canvas->clear(0xFF888888); 38 39 canvas->translate(20, 20); 40 for (const auto& xform : xforms) { 41 canvas->save(); 42 canvas->translate(xform.fTx, xform.fTy); 43 canvas->scale(xform.fSx, xform.fSy); 44 45 // Draw an image, possibly down sampled, which forces us to generate mipmaps inline 46 // on the second iteration. 47 canvas->drawImage(image, 0, 0, &imagePaint); 48 49 // Draw an overlay that requires the scissor test for its clipping, so that the mipmap 50 // generation + scissor interference bug is highlighted in Adreno 330 devices. 51 SkRect inner = SkRect::MakeLTRB(32.f, 32.f, 480.f, 480.f); 52 SkRect outer = inner.makeOutset(16.f, 16.f); 53 54 // Clip to smaller rectangle 55 canvas->save(); 56 canvas->clipRect(inner); 57 // Then apply a rotation and draw a larger rectangle to ensure the clip cannot be dropped 58 canvas->rotate(20.f); 59 canvas->drawRect(outer, overlayPaint); 60 canvas->restore(); 61 62 canvas->restore(); 63 } 64 } 65
