reed@android.com | dd0ac28 | 2009-06-20 02:38:16 +0000 | [diff] [blame] | 1 | #include "gm.h" |
| 2 | #include "SkBitmap.h" |
| 3 | #include "SkShader.h" |
| 4 | #include "SkXfermode.h" |
| 5 | |
| 6 | namespace skiagm { |
| 7 | |
| 8 | static void make_bitmaps(int w, int h, SkBitmap* src, SkBitmap* dst) { |
| 9 | src->setConfig(SkBitmap::kARGB_8888_Config, w, h); |
| 10 | src->allocPixels(); |
| 11 | src->eraseColor(0); |
| 12 | |
| 13 | SkCanvas c(*src); |
| 14 | SkPaint p; |
| 15 | SkRect r; |
| 16 | SkScalar ww = SkIntToScalar(w); |
| 17 | SkScalar hh = SkIntToScalar(h); |
| 18 | |
| 19 | p.setAntiAlias(true); |
| 20 | p.setColor(0xFFFFCC44); |
| 21 | r.set(0, 0, ww*3/4, hh*3/4); |
| 22 | c.drawOval(r, p); |
| 23 | |
| 24 | dst->setConfig(SkBitmap::kARGB_8888_Config, w, h); |
| 25 | dst->allocPixels(); |
| 26 | dst->eraseColor(0); |
| 27 | c.setBitmapDevice(*dst); |
| 28 | |
| 29 | p.setColor(0xFF66AAFF); |
| 30 | r.set(ww/3, hh/3, ww*19/20, hh*19/20); |
| 31 | c.drawRect(r, p); |
| 32 | } |
| 33 | |
| 34 | static uint16_t gBG[] = { 0xFFFF, 0xCCCF, 0xCCCF, 0xFFFF }; |
| 35 | |
| 36 | class XfermodesGM : public GM { |
| 37 | SkBitmap fBitmap; |
| 38 | SkBitmap fBG; |
| 39 | SkBitmap fSrcB, fDstB; |
| 40 | |
| 41 | void draw_mode(SkCanvas* canvas, SkXfermode* mode, int alpha) { |
| 42 | SkPaint p; |
| 43 | |
| 44 | canvas->drawBitmap(fSrcB, 0, 0, &p); |
| 45 | p.setAlpha(alpha); |
| 46 | p.setXfermode(mode); |
| 47 | canvas->drawBitmap(fDstB, 0, 0, &p); |
| 48 | } |
| 49 | |
| 50 | public: |
| 51 | XfermodesGM() { |
| 52 | const int W = 64; |
| 53 | const int H = 64; |
| 54 | |
| 55 | fBitmap.setConfig(SkBitmap::kARGB_8888_Config, W, H); |
| 56 | fBitmap.allocPixels(); |
| 57 | |
| 58 | fBG.setConfig(SkBitmap::kARGB_4444_Config, 2, 2, 4); |
| 59 | fBG.setPixels(gBG); |
| 60 | fBG.setIsOpaque(true); |
| 61 | |
| 62 | make_bitmaps(W, H, &fSrcB, &fDstB); |
| 63 | } |
| 64 | |
| 65 | protected: |
reed@android.com | 8015dd8 | 2009-06-21 00:49:18 +0000 | [diff] [blame^] | 66 | SkString onShortName() { |
| 67 | return SkString("xfermodes"); |
| 68 | } |
| 69 | |
reed@android.com | dd0ac28 | 2009-06-20 02:38:16 +0000 | [diff] [blame] | 70 | SkISize onISize() { return make_isize(400, 250); } |
| 71 | |
| 72 | void drawBG(SkCanvas* canvas) { |
| 73 | canvas->drawColor(SK_ColorWHITE); |
| 74 | return; |
| 75 | SkShader* s = SkShader::CreateBitmapShader(fBG, |
| 76 | SkShader::kRepeat_TileMode, |
| 77 | SkShader::kRepeat_TileMode); |
| 78 | SkPaint p; |
| 79 | SkMatrix m; |
| 80 | |
| 81 | p.setShader(s)->unref(); |
| 82 | m.setScale(SkIntToScalar(8), SkIntToScalar(8)); |
| 83 | s->setLocalMatrix(m); |
| 84 | canvas->drawPaint(p); |
| 85 | } |
| 86 | |
| 87 | virtual void onDraw(SkCanvas* canvas) { |
| 88 | this->drawBG(canvas); |
| 89 | |
| 90 | const struct { |
| 91 | SkPorterDuff::Mode fMode; |
| 92 | const char* fLabel; |
| 93 | } gModes[] = { |
| 94 | { SkPorterDuff::kClear_Mode, "Clear" }, |
| 95 | { SkPorterDuff::kSrc_Mode, "Src" }, |
| 96 | { SkPorterDuff::kDst_Mode, "Dst" }, |
| 97 | { SkPorterDuff::kSrcOver_Mode, "SrcOver" }, |
| 98 | { SkPorterDuff::kDstOver_Mode, "DstOver" }, |
| 99 | { SkPorterDuff::kSrcIn_Mode, "SrcIn" }, |
| 100 | { SkPorterDuff::kDstIn_Mode, "DstIn" }, |
| 101 | { SkPorterDuff::kSrcOut_Mode, "SrcOut" }, |
| 102 | { SkPorterDuff::kDstOut_Mode, "DstOut" }, |
| 103 | { SkPorterDuff::kSrcATop_Mode, "SrcATop" }, |
| 104 | { SkPorterDuff::kDstATop_Mode, "DstATop" }, |
| 105 | { SkPorterDuff::kXor_Mode, "Xor" }, |
| 106 | { SkPorterDuff::kDarken_Mode, "Darken" }, |
| 107 | { SkPorterDuff::kLighten_Mode, "Lighten" }, |
| 108 | { SkPorterDuff::kMultiply_Mode, "Multiply" }, |
| 109 | { SkPorterDuff::kScreen_Mode, "Screen" } |
| 110 | }; |
| 111 | |
| 112 | canvas->translate(SkIntToScalar(10), SkIntToScalar(20)); |
| 113 | |
| 114 | SkCanvas c(fBitmap); |
| 115 | const SkScalar w = SkIntToScalar(fBitmap.width()); |
| 116 | const SkScalar h = SkIntToScalar(fBitmap.height()); |
| 117 | SkShader* s = SkShader::CreateBitmapShader(fBG, |
| 118 | SkShader::kRepeat_TileMode, |
| 119 | SkShader::kRepeat_TileMode); |
| 120 | SkMatrix m; |
| 121 | m.setScale(SkIntToScalar(6), SkIntToScalar(6)); |
| 122 | s->setLocalMatrix(m); |
| 123 | |
| 124 | SkPaint labelP; |
| 125 | labelP.setAntiAlias(true); |
| 126 | labelP.setTextAlign(SkPaint::kCenter_Align); |
| 127 | |
| 128 | SkScalar x0 = 0; |
| 129 | for (int twice = 0; twice < 2; twice++) { |
| 130 | SkScalar x = x0, y = 0; |
| 131 | for (size_t i = 0; i < SK_ARRAY_COUNT(gModes); i++) { |
| 132 | SkXfermode* mode = SkPorterDuff::CreateXfermode(gModes[i].fMode); |
| 133 | |
| 134 | fBitmap.eraseColor(0); |
| 135 | draw_mode(&c, mode, twice ? 0x88 : 0xFF); |
| 136 | mode->safeUnref(); |
| 137 | |
| 138 | SkPaint p; |
| 139 | SkRect r; |
| 140 | r.set(x, y, x+w, y+h); |
| 141 | r.inset(-SK_ScalarHalf, -SK_ScalarHalf); |
| 142 | p.setStyle(SkPaint::kStroke_Style); |
| 143 | canvas->drawRect(r, p); |
| 144 | p.setStyle(SkPaint::kFill_Style); |
| 145 | p.setShader(s); |
| 146 | r.inset(SK_ScalarHalf, SK_ScalarHalf); |
| 147 | canvas->drawRect(r, p); |
| 148 | |
| 149 | canvas->drawBitmap(fBitmap, x, y, NULL); |
| 150 | |
| 151 | #if 1 |
| 152 | canvas->drawText(gModes[i].fLabel, strlen(gModes[i].fLabel), |
| 153 | x + w/2, y - labelP.getTextSize()/2, labelP); |
| 154 | #endif |
| 155 | x += w + SkIntToScalar(10); |
| 156 | if ((i & 3) == 3) { |
| 157 | x = x0; |
| 158 | y += h + SkIntToScalar(30); |
| 159 | } |
| 160 | } |
| 161 | x0 += SkIntToScalar(330); |
| 162 | } |
| 163 | s->unref(); |
| 164 | } |
| 165 | |
| 166 | private: |
| 167 | typedef GM INHERITED; |
| 168 | }; |
| 169 | |
| 170 | ////////////////////////////////////////////////////////////////////////////// |
| 171 | |
| 172 | static GM* MyFactory(void*) { return new XfermodesGM; } |
| 173 | static GMRegistry reg(MyFactory); |
| 174 | |
| 175 | } |
| 176 | |