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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 "gm.h"
      9 #include "sk_tool_utils.h"
     10 #include "SkImage.h"
     11 #include "SkRandom.h"
     12 
     13 #if SK_SUPPORT_GPU && !defined(SK_BUILD_FOR_GOOGLE3)
     14 #include "etc1.h"
     15 
     16 #include "GrContext.h"
     17 #include "GrGpu.h"
     18 #include "GrRenderTargetContext.h"
     19 #include "GrRenderTargetContextPriv.h"
     20 #include "GrTextureProxy.h"
     21 #include "effects/GrSimpleTextureEffect.h"
     22 #include "ops/GrFillRectOp.h"
     23 
     24 // Basic test of Ganesh's ETC1 support
     25 class ETC1GM : public skiagm::GpuGM {
     26 public:
     27     ETC1GM() {
     28         this->setBGColor(0xFFCCCCCC);
     29     }
     30 
     31 protected:
     32     SkString onShortName() override {
     33         return SkString("etc1");
     34     }
     35 
     36     SkISize onISize() override {
     37         return SkISize::Make(kTexWidth + 2*kPad, kTexHeight + 2*kPad);
     38     }
     39 
     40     void onOnceBeforeDraw() override {
     41         SkBitmap bm;
     42         SkImageInfo ii = SkImageInfo::Make(kTexWidth, kTexHeight, kRGB_565_SkColorType,
     43                                            kOpaque_SkAlphaType);
     44         bm.allocPixels(ii);
     45 
     46         bm.erase(SK_ColorBLUE, SkIRect::MakeWH(kTexWidth, kTexHeight));
     47 
     48         for (int y = 0; y < kTexHeight; y += 4) {
     49             for (int x = 0; x < kTexWidth; x += 4) {
     50                 bm.erase((x+y) % 8 ? SK_ColorRED : SK_ColorGREEN, SkIRect::MakeXYWH(x, y, 4, 4));
     51             }
     52         }
     53 
     54         int size = etc1_get_encoded_data_size(bm.width(), bm.height());
     55         fETC1Data = SkData::MakeUninitialized(size);
     56 
     57         unsigned char* pixels = (unsigned char*) fETC1Data->writable_data();
     58 
     59         if (etc1_encode_image((unsigned char*) bm.getAddr16(0, 0),
     60                               bm.width(), bm.height(), 2, bm.rowBytes(), pixels)) {
     61             fETC1Data = nullptr;
     62         }
     63     }
     64 
     65     void onDraw(GrContext* context, GrRenderTargetContext*, SkCanvas* canvas) override {
     66         sk_sp<SkImage> image = SkImage::MakeFromCompressed(context, fETC1Data,
     67                                                            kTexWidth, kTexHeight,
     68                                                            SkImage::kETC1_CompressionType);
     69 
     70         canvas->drawImage(image, 0, 0);
     71     }
     72 
     73 private:
     74     static const int kPad = 8;
     75     static const int kTexWidth = 16;
     76     static const int kTexHeight = 20;
     77 
     78     sk_sp<SkData> fETC1Data;
     79 
     80     typedef GM INHERITED;
     81 };
     82 
     83 //////////////////////////////////////////////////////////////////////////////
     84 
     85 DEF_GM(return new ETC1GM;)
     86 
     87 #endif
     88