text: /*
   * Copyright 2016 Google Inc.
   *
   * Use of this source code is governed by a BSD-style license that can be
   * found in the LICENSE file.
   */
  
  #include "Test.h"
  
  #if SK_SUPPORT_GPU
  #include "GrContext.h"
  #include "GrDrawContext.h"
  #include "GrGpu.h"
  #include "GrRenderTarget.h"
  #include "GrTexture.h"
  #include "GrTextureProvider.h"
  
  static bool check_rect(GrDrawContext* dc, const SkIRect& rect, uint32_t expectedValue,
                         uint32_t* actualValue, int* failX, int* failY) {
      GrRenderTarget* rt = dc->accessRenderTarget();
      int w = rect.width();
      int h = rect.height();
      SkAutoTDeleteArray<uint32_t> pixels(new uint32_t[w * h]);
      memset(pixels.get(), ~expectedValue, sizeof(uint32_t) * w * h);
      rt->readPixels(rect.fLeft, rect.fTop, w, h, kRGBA_8888_GrPixelConfig, pixels.get());
      for (int y = 0; y < h; ++y) {
          for (int x = 0; x < w; ++x) {
              uint32_t pixel = pixels.get()[y * w + x];
              if (pixel != expectedValue) {
                  *actualValue = pixel;
                  *failX = x + rect.fLeft;
                  *failY = y + rect.fTop;
                  return false;
              }
          }
      }
      return true;
  }
  
  static bool reset_dc(sk_sp<GrDrawContext>* dc, GrContext* context, int w, int h) {
      SkDEBUGCODE(uint32_t oldID = 0;)
      if (*dc) {
          SkDEBUGCODE(oldID = (*dc)->accessRenderTarget()->getUniqueID();)
          dc->reset(nullptr);
      }
      context->freeGpuResources();
  
      *dc = context->newDrawContext(SkBackingFit::kExact, w, h, kRGBA_8888_GrPixelConfig);
  
      SkASSERT((*dc)->accessRenderTarget()->getUniqueID() != oldID);
  
      return *dc != nullptr;
  }
  
  DEF_GPUTEST_FOR_RENDERING_CONTEXTS(ClearBatch, reporter, ctxInfo) {
      GrContext* context = ctxInfo.fGrContext;
      static const int kW = 10;
      static const int kH = 10;
  
      SkIRect fullRect = SkIRect::MakeWH(kW, kH);
      sk_sp<GrDrawContext> drawContext;
  
      // A rectangle that is inset by one on all sides and the 1-pixel wide rectangles that surround
      // it.
      SkIRect mid1Rect = SkIRect::MakeXYWH(1, 1, kW-2, kH-2);
      SkIRect outerLeftEdge = SkIRect::MakeXYWH(0, 0, 1, kH);
      SkIRect outerTopEdge = SkIRect::MakeXYWH(0, 0, kW, 1);
      SkIRect outerRightEdge = SkIRect::MakeXYWH(kW-1, 0, 1, kH);
      SkIRect outerBottomEdge = SkIRect::MakeXYWH(0, kH-1, kW, 1);
  
      // A rectangle that is inset by two on all sides and the 1-pixel wide rectangles that surround
      // it.
      SkIRect mid2Rect = SkIRect::MakeXYWH(2, 2, kW-4, kH-4);
      SkIRect innerLeftEdge = SkIRect::MakeXYWH(1, 1, 1, kH-2);
      SkIRect innerTopEdge = SkIRect::MakeXYWH(1, 1, kW-2, 1);
      SkIRect innerRightEdge = SkIRect::MakeXYWH(kW-2, 1, 1, kH-2);
      SkIRect innerBottomEdge = SkIRect::MakeXYWH(1, kH-2, kW-2, 1);
  
      uint32_t actualValue;
      int failX, failY;
  
      static const GrColor kColor1 = 0xABCDEF01;
      static const GrColor kColor2 = ~kColor1;
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Check a full clear
      drawContext->clear(&fullRect, kColor1, false);
      if (!check_rect(drawContext.get(), fullRect, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Check two full clears, same color
      drawContext->clear(&fullRect, kColor1, false);
      drawContext->clear(&fullRect, kColor1, false);
      if (!check_rect(drawContext.get(), fullRect, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Check two full clears, different colors
      drawContext->clear(&fullRect, kColor1, false);
      drawContext->clear(&fullRect, kColor2, false);
      if (!check_rect(drawContext.get(), fullRect, kColor2, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor2, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Test a full clear followed by a same color inset clear
      drawContext->clear(&fullRect, kColor1, false);
      drawContext->clear(&mid1Rect, kColor1, false);
      if (!check_rect(drawContext.get(), fullRect, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Test a inset clear followed by same color full clear
      drawContext->clear(&mid1Rect, kColor1, false);
      drawContext->clear(&fullRect, kColor1, false);
      if (!check_rect(drawContext.get(), fullRect, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Test a full clear followed by a different color inset clear
      drawContext->clear(&fullRect, kColor1, false);
      drawContext->clear(&mid1Rect, kColor2, false);
      if (!check_rect(drawContext.get(), mid1Rect, kColor2, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor2, actualValue,
                 failX, failY);
      }
      if (!check_rect(drawContext.get(), outerLeftEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerTopEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerRightEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerBottomEdge, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Test a inset clear followed by a different full clear
      drawContext->clear(&mid1Rect, kColor2, false);
      drawContext->clear(&fullRect, kColor1, false);
      if (!check_rect(drawContext.get(), fullRect, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Check three nested clears from largest to smallest where outermost and innermost are same
      // color.
      drawContext->clear(&fullRect, kColor1, false);
      drawContext->clear(&mid1Rect, kColor2, false);
      drawContext->clear(&mid2Rect, kColor1, false);
      if (!check_rect(drawContext.get(), mid2Rect, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
      if (!check_rect(drawContext.get(), innerLeftEdge, kColor2, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), innerTopEdge, kColor2, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), innerRightEdge, kColor2, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), innerBottomEdge, kColor2, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor2, actualValue,
                 failX, failY);
      }
      if (!check_rect(drawContext.get(), outerLeftEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerTopEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerRightEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerBottomEdge, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  
      if (!reset_dc(&drawContext, context, kW, kH)) {
          ERRORF(reporter, "Could not create draw context.");
          return;
      }
      // Swap the order of the second two clears in the above test.
      drawContext->clear(&fullRect, kColor1, false);
      drawContext->clear(&mid2Rect, kColor1, false);
      drawContext->clear(&mid1Rect, kColor2, false);
      if (!check_rect(drawContext.get(), mid1Rect, kColor2, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor2, actualValue,
                 failX, failY);
      }
      if (!check_rect(drawContext.get(), outerLeftEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerTopEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerRightEdge, kColor1, &actualValue, &failX, &failY) ||
          !check_rect(drawContext.get(), outerBottomEdge, kColor1, &actualValue, &failX, &failY)) {
          ERRORF(reporter, "Expected 0x%08x but got 0x%08x at (%d, %d).", kColor1, actualValue,
                 failX, failY);
      }
  }
  #endif
  