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      1 
      2 /*
      3  * Copyright 2011 Google Inc.
      4  *
      5  * Use of this source code is governed by a BSD-style license that can be
      6  * found in the LICENSE file.
      7  */
      8 #include "gm.h"
      9 #include "SkCanvas.h"
     10 #include "SkGradientShader.h"
     11 #include "SkGraphics.h"
     12 #include "SkPath.h"
     13 #include "SkRegion.h"
     14 #include "SkShader.h"
     15 
     16 static void make_bitmap(SkBitmap* bitmap) {
     17     bitmap->allocN32Pixels(64, 64);
     18 
     19     SkCanvas canvas(*bitmap);
     20 
     21     canvas.drawColor(SK_ColorRED);
     22     SkPaint paint;
     23     paint.setAntiAlias(true);
     24     const SkPoint pts[] = { { 0, 0 }, { 64, 64 } };
     25     const SkColor colors[] = { SK_ColorWHITE, SK_ColorBLUE };
     26     paint.setShader(SkGradientShader::CreateLinear(pts, colors, NULL, 2,
     27                                                    SkShader::kClamp_TileMode))->unref();
     28     canvas.drawCircle(32, 32, 32, paint);
     29 }
     30 
     31 class DrawBitmapRect2 : public skiagm::GM {
     32     bool fUseIRect;
     33 public:
     34     DrawBitmapRect2(bool useIRect) : fUseIRect(useIRect) {
     35     }
     36 
     37 protected:
     38     virtual SkString onShortName() SK_OVERRIDE {
     39         SkString str;
     40         str.printf("bitmaprect_%s", fUseIRect ? "i" : "s");
     41         return str;
     42     }
     43 
     44     virtual SkISize onISize() SK_OVERRIDE {
     45         return SkISize::Make(640, 480);
     46     }
     47 
     48     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
     49         canvas->drawColor(0xFFCCCCCC);
     50 
     51         const SkIRect src[] = {
     52             { 0, 0, 32, 32 },
     53             { 0, 0, 80, 80 },
     54             { 32, 32, 96, 96 },
     55             { -32, -32, 32, 32, }
     56         };
     57 
     58         SkPaint paint;
     59         paint.setStyle(SkPaint::kStroke_Style);
     60 
     61         SkBitmap bitmap;
     62         make_bitmap(&bitmap);
     63 
     64         SkRect dstR = { 0, 200, 128, 380 };
     65 
     66         canvas->translate(16, 40);
     67         for (size_t i = 0; i < SK_ARRAY_COUNT(src); i++) {
     68             SkRect srcR;
     69             srcR.set(src[i]);
     70 
     71             canvas->drawBitmap(bitmap, 0, 0, &paint);
     72             if (!fUseIRect) {
     73                 canvas->drawBitmapRectToRect(bitmap, &srcR, dstR, &paint);
     74             } else {
     75                 canvas->drawBitmapRect(bitmap, &src[i], dstR, &paint);
     76             }
     77 
     78             canvas->drawRect(dstR, paint);
     79             canvas->drawRect(srcR, paint);
     80 
     81             canvas->translate(160, 0);
     82         }
     83     }
     84 
     85 private:
     86     typedef skiagm::GM INHERITED;
     87 };
     88 
     89 //////////////////////////////////////////////////////////////////////////////
     90 static void make_3x3_bitmap(SkBitmap* bitmap) {
     91 
     92     static const int gXSize = 3;
     93     static const int gYSize = 3;
     94 
     95     SkColor textureData[gXSize][gYSize] = {
     96         { SK_ColorRED,    SK_ColorWHITE, SK_ColorBLUE },
     97         { SK_ColorGREEN,  SK_ColorBLACK, SK_ColorCYAN },
     98         { SK_ColorYELLOW, SK_ColorGRAY,  SK_ColorMAGENTA }
     99     };
    100 
    101 
    102     bitmap->allocN32Pixels(gXSize, gYSize);
    103     for (int y = 0; y < gYSize; y++) {
    104         for (int x = 0; x < gXSize; x++) {
    105             *bitmap->getAddr32(x, y) = textureData[x][y];
    106         }
    107     }
    108 }
    109 
    110 // This GM attempts to make visible any issues drawBitmapRectToRect may have
    111 // with partial source rects. In this case the eight pixels on the border
    112 // should be half the width/height of the central pixel, i.e.:
    113 //                         __|____|__
    114 //                           |    |
    115 //                         __|____|__
    116 //                           |    |
    117 class DrawBitmapRect3 : public skiagm::GM {
    118 public:
    119     DrawBitmapRect3() {
    120         this->setBGColor(SK_ColorBLACK);
    121     }
    122 
    123 protected:
    124     virtual SkString onShortName() SK_OVERRIDE {
    125         SkString str;
    126         str.printf("3x3bitmaprect");
    127         return str;
    128     }
    129 
    130     virtual SkISize onISize() SK_OVERRIDE {
    131         return SkISize::Make(640, 480);
    132     }
    133 
    134     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
    135 
    136         SkBitmap bitmap;
    137         make_3x3_bitmap(&bitmap);
    138 
    139         SkRect srcR = { 0.5f, 0.5f, 2.5f, 2.5f };
    140         SkRect dstR = { 100, 100, 300, 200 };
    141 
    142         canvas->drawBitmapRectToRect(bitmap, &srcR, dstR, NULL);
    143     }
    144 
    145 private:
    146     typedef skiagm::GM INHERITED;
    147 };
    148 
    149 //////////////////////////////////////////////////////////////////////////////
    150 static void make_big_bitmap(SkBitmap* bitmap) {
    151 
    152     static const int gXSize = 4096;
    153     static const int gYSize = 4096;
    154     static const int gBorderWidth = 10;
    155 
    156     bitmap->allocN32Pixels(gXSize, gYSize);
    157     for (int y = 0; y < gYSize; ++y) {
    158         for (int x = 0; x < gXSize; ++x) {
    159             if (x <= gBorderWidth || x >= gXSize-gBorderWidth ||
    160                 y <= gBorderWidth || y >= gYSize-gBorderWidth) {
    161                 *bitmap->getAddr32(x, y) = 0x88FFFFFF;
    162             } else {
    163                 *bitmap->getAddr32(x, y) = 0x88FF0000;
    164             }
    165         }
    166     }
    167 }
    168 
    169 // This GM attempts to reveal any issues we may have when the GPU has to
    170 // break up a large texture in order to draw it. The XOR transfer mode will
    171 // create stripes in the image if there is imprecision in the destination
    172 // tile placement.
    173 class DrawBitmapRect4 : public skiagm::GM {
    174     bool fUseIRect;
    175     SkBitmap fBigBitmap;
    176 
    177 public:
    178     DrawBitmapRect4(bool useIRect) : fUseIRect(useIRect) {
    179         this->setBGColor(0x88444444);
    180     }
    181 
    182 protected:
    183     virtual SkString onShortName() SK_OVERRIDE {
    184         SkString str;
    185         str.printf("bigbitmaprect_%s", fUseIRect ? "i" : "s");
    186         return str;
    187     }
    188 
    189     virtual SkISize onISize() SK_OVERRIDE {
    190         return SkISize::Make(640, 480);
    191     }
    192 
    193     virtual void onOnceBeforeDraw() SK_OVERRIDE {
    194         make_big_bitmap(&fBigBitmap);
    195     }
    196 
    197     virtual void onDraw(SkCanvas* canvas) SK_OVERRIDE {
    198 
    199         SkXfermode* mode = SkXfermode::Create(SkXfermode::kXor_Mode);
    200 
    201         SkPaint paint;
    202         paint.setAlpha(128);
    203         paint.setXfermode(mode)->unref();
    204 
    205         SkRect srcR1 = { 0.0f, 0.0f, 4096.0f, 2040.0f };
    206         SkRect dstR1 = { 10.1f, 10.1f, 629.9f, 400.9f };
    207 
    208         SkRect srcR2 = { 4085.0f, 10.0f, 4087.0f, 12.0f };
    209         SkRect dstR2 = { 10, 410, 30, 430 };
    210 
    211         if (!fUseIRect) {
    212             canvas->drawBitmapRectToRect(fBigBitmap, &srcR1, dstR1, &paint);
    213             canvas->drawBitmapRectToRect(fBigBitmap, &srcR2, dstR2, &paint);
    214         } else {
    215             SkIRect iSrcR1, iSrcR2;
    216 
    217             srcR1.roundOut(&iSrcR1);
    218             srcR2.roundOut(&iSrcR2);
    219 
    220             canvas->drawBitmapRect(fBigBitmap, &iSrcR1, dstR1, &paint);
    221             canvas->drawBitmapRect(fBigBitmap, &iSrcR2, dstR2, &paint);
    222         }
    223     }
    224 
    225 private:
    226     typedef skiagm::GM INHERITED;
    227 };
    228 
    229 //////////////////////////////////////////////////////////////////////////////
    230 
    231 static skiagm::GM* MyFactory0(void*) { return new DrawBitmapRect2(false); }
    232 static skiagm::GM* MyFactory1(void*) { return new DrawBitmapRect2(true); }
    233 
    234 static skiagm::GM* MyFactory2(void*) { return new DrawBitmapRect3(); }
    235 
    236 #ifndef SK_BUILD_FOR_ANDROID
    237 static skiagm::GM* MyFactory3(void*) { return new DrawBitmapRect4(false); }
    238 static skiagm::GM* MyFactory4(void*) { return new DrawBitmapRect4(true); }
    239 #endif
    240 
    241 static skiagm::GMRegistry reg0(MyFactory0);
    242 static skiagm::GMRegistry reg1(MyFactory1);
    243 
    244 static skiagm::GMRegistry reg2(MyFactory2);
    245 
    246 #ifndef SK_BUILD_FOR_ANDROID
    247 static skiagm::GMRegistry reg3(MyFactory3);
    248 static skiagm::GMRegistry reg4(MyFactory4);
    249 #endif
    250