1 /* 2 * Copyright 2020 Google LLC. 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/SkPoint.h" 10 #include "include/core/SkRect.h" 11 #include "include/private/SkColorData.h" 12 #include "src/core/SkCanvasPriv.h" 13 #include "src/gpu/GrRecordingContextPriv.h" 14 #include "src/gpu/GrSwizzle.h" 15 #include "src/gpu/SurfaceFillContext.h" 16 17 namespace skiagm { 18 19 // Size of each clear 20 static constexpr int kSize = 64; 21 22 DEF_SIMPLE_GPU_GM_CAN_FAIL(clear_swizzle, rContext, canvas, errorMsg, 6*kSize, 2*kSize) { 23 if (rContext->abandoned()) { 24 *errorMsg = GM::kErrorMsg_DrawSkippedGpuOnly; 25 return DrawResult::kSkip; 26 } 27 28 auto sfc = SkCanvasPriv::TopDeviceSurfaceFillContext(canvas); 29 if (!sfc) { 30 *errorMsg = GM::kErrorMsg_DrawSkippedGpuOnly; 31 return DrawResult::kSkip; 32 } 33 __anon2ce2630c0102(const SkISize dimensions) 34 auto make_offscreen = [&](const SkISize dimensions) { 35 GrSwizzle readSwizzle = GrSwizzle::Concat(sfc->readSwizzle(), GrSwizzle{"bgra"}); 36 GrSwizzle writeSwizzle = GrSwizzle::Concat(sfc->readSwizzle(), GrSwizzle{"bgra"}); 37 return rContext->priv().makeSFC(kPremul_SkAlphaType, 38 sfc->colorInfo().refColorSpace(), 39 dimensions, 40 SkBackingFit::kExact, 41 sfc->asSurfaceProxy()->backendFormat(), 42 /* sample count*/ 1, 43 GrMipmapped::kNo, 44 sfc->asSurfaceProxy()->isProtected(), 45 readSwizzle, 46 writeSwizzle, 47 kTopLeft_GrSurfaceOrigin, 48 SkBudgeted::kYes); 49 }; 50 51 struct { 52 SkIRect rect; 53 SkPMColor4f color; 54 } clears[] { 55 {{ 0, 0, kSize, kSize}, {1, 0, 0, 1}}, 56 {{kSize, 0, 2*kSize, kSize}, {0, 1, 0, 1}}, 57 {{ 0, kSize, kSize, 2*kSize}, {0, 0, 1, 1}}, 58 {{kSize, kSize, 2*kSize, 2*kSize}, {1, 0, 1, 1}}, 59 }; 60 61 // onscreen for reference 62 for (const auto& c : clears) { 63 sfc->clear(c.rect, c.color); 64 } 65 66 // partial clear offscreen 67 auto offscreen = make_offscreen({2*kSize, 2*kSize}); 68 for (const auto& c : clears) { 69 offscreen->clear(c.rect, c.color); 70 } 71 sfc->blitTexture(offscreen->readSurfaceView(), 72 SkIRect::MakeSize({2*kSize, 2*kSize}), 73 SkIPoint{2*kSize, 0}); 74 75 // full offscreen clears 76 for (const auto& c : clears) { 77 offscreen = make_offscreen(c.rect.size()); 78 offscreen->clear(SkIRect::MakeSize(c.rect.size()), c.color); 79 sfc->blitTexture(offscreen->readSurfaceView(), 80 SkIRect::MakeSize(offscreen->dimensions()), 81 c.rect.topLeft() + SkIPoint{4*kSize, 0}); 82 } 83 84 return DrawResult::kOk; 85 } 86 87 } // namespace skiagm 88