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