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      1 /*
      2  * Copyright 2017 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 "TestUtils.h"
      9 
     10 #if SK_SUPPORT_GPU
     11 
     12 #include "GrProxyProvider.h"
     13 #include "GrSurfaceContext.h"
     14 #include "GrSurfaceProxy.h"
     15 #include "GrTextureProxy.h"
     16 
     17 void test_read_pixels(skiatest::Reporter* reporter,
     18                       GrSurfaceContext* srcContext, uint32_t expectedPixelValues[],
     19                       const char* testName) {
     20     int pixelCnt = srcContext->width() * srcContext->height();
     21     SkAutoTMalloc<uint32_t> pixels(pixelCnt);
     22     memset(pixels.get(), 0, sizeof(uint32_t)*pixelCnt);
     23 
     24     SkImageInfo ii = SkImageInfo::Make(srcContext->width(), srcContext->height(),
     25                                        kRGBA_8888_SkColorType, kPremul_SkAlphaType);
     26     bool read = srcContext->readPixels(ii, pixels.get(), 0, 0, 0);
     27     if (!read) {
     28         ERRORF(reporter, "%s: Error reading from texture.", testName);
     29     }
     30 
     31     for (int i = 0; i < pixelCnt; ++i) {
     32         if (pixels.get()[i] != expectedPixelValues[i]) {
     33             ERRORF(reporter, "%s: Error, pixel value %d should be 0x%08x, got 0x%08x.",
     34                    testName, i, expectedPixelValues[i], pixels.get()[i]);
     35             break;
     36         }
     37     }
     38 }
     39 
     40 void test_write_pixels(skiatest::Reporter* reporter,
     41                        GrSurfaceContext* dstContext, bool expectedToWork,
     42                        const char* testName) {
     43     int pixelCnt = dstContext->width() * dstContext->height();
     44     SkAutoTMalloc<uint32_t> pixels(pixelCnt);
     45     for (int y = 0; y < dstContext->width(); ++y) {
     46         for (int x = 0; x < dstContext->height(); ++x) {
     47             pixels.get()[y * dstContext->width() + x] =
     48                 GrPremulColor(GrColorPackRGBA(x, y, x + y, 2*y));
     49         }
     50     }
     51 
     52     SkImageInfo ii = SkImageInfo::Make(dstContext->width(), dstContext->height(),
     53                                        kRGBA_8888_SkColorType, kPremul_SkAlphaType);
     54     bool write = dstContext->writePixels(ii, pixels.get(), 0, 0, 0);
     55     if (!write) {
     56         if (expectedToWork) {
     57             ERRORF(reporter, "%s: Error writing to texture.", testName);
     58         }
     59         return;
     60     }
     61 
     62     if (write && !expectedToWork) {
     63         ERRORF(reporter, "%s: writePixels succeeded when it wasn't supposed to.", testName);
     64         return;
     65     }
     66 
     67     test_read_pixels(reporter, dstContext, pixels.get(), testName);
     68 }
     69 
     70 void test_copy_from_surface(skiatest::Reporter* reporter, GrContext* context,
     71                             GrSurfaceProxy* proxy, uint32_t expectedPixelValues[],
     72                             bool onlyTestRTConfig, const char* testName) {
     73     GrSurfaceDesc copyDstDesc;
     74     copyDstDesc.fWidth = proxy->width();
     75     copyDstDesc.fHeight = proxy->height();
     76     copyDstDesc.fConfig = kRGBA_8888_GrPixelConfig;
     77 
     78     for (auto flags : { kNone_GrSurfaceFlags, kRenderTarget_GrSurfaceFlag }) {
     79         if (kNone_GrSurfaceFlags == flags && onlyTestRTConfig) {
     80             continue;
     81         }
     82 
     83         copyDstDesc.fFlags = flags;
     84         copyDstDesc.fOrigin = (kNone_GrSurfaceFlags == flags) ? kTopLeft_GrSurfaceOrigin
     85                                                               : kBottomLeft_GrSurfaceOrigin;
     86 
     87         sk_sp<GrSurfaceContext> dstContext(GrSurfaceProxy::TestCopy(context, copyDstDesc, proxy));
     88 
     89         test_read_pixels(reporter, dstContext.get(), expectedPixelValues, testName);
     90     }
     91 }
     92 
     93 void test_copy_to_surface(skiatest::Reporter* reporter, GrProxyProvider* proxyProvider,
     94                           GrSurfaceContext* dstContext, const char* testName) {
     95 
     96     int pixelCnt = dstContext->width() * dstContext->height();
     97     SkAutoTMalloc<uint32_t> pixels(pixelCnt);
     98     for (int y = 0; y < dstContext->width(); ++y) {
     99         for (int x = 0; x < dstContext->height(); ++x) {
    100             pixels.get()[y * dstContext->width() + x] =
    101                 GrPremulColor(GrColorPackRGBA(y, x, x * y, 2*y));
    102         }
    103     }
    104 
    105     GrSurfaceDesc copySrcDesc;
    106     copySrcDesc.fWidth = dstContext->width();
    107     copySrcDesc.fHeight = dstContext->height();
    108     copySrcDesc.fConfig = kRGBA_8888_GrPixelConfig;
    109 
    110     for (auto flags : { kNone_GrSurfaceFlags, kRenderTarget_GrSurfaceFlag }) {
    111         copySrcDesc.fFlags = flags;
    112         copySrcDesc.fOrigin = (kNone_GrSurfaceFlags == flags) ? kTopLeft_GrSurfaceOrigin
    113                                                               : kBottomLeft_GrSurfaceOrigin;
    114 
    115         sk_sp<GrTextureProxy> src = proxyProvider->createTextureProxy(copySrcDesc, SkBudgeted::kYes,
    116                                                                       pixels.get(), 0);
    117 
    118         dstContext->copy(src.get());
    119 
    120         test_read_pixels(reporter, dstContext, pixels.get(), testName);
    121     }
    122 }
    123 
    124 #endif
    125