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| 1 /* |
| 2 * Copyright 2016 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 "SkCanvas.h" |
| 10 #include "SkImageInfo.h" |
| 11 #include "SkXfermode.h" |
| 12 #include "SkHalf.h" |
| 13 #include "SkImage.h" |
| 14 |
| 15 static SkPMColor f16_to_pmcolor(uint64_t src) { |
| 16 SkPMColor dst; |
| 17 const SkHalf* sptr = reinterpret_cast<const SkHalf*>(&src); |
| 18 uint8_t* dptr = reinterpret_cast<uint8_t*>(&dst); |
| 19 for (int i = 0; i < 4; ++i) { |
| 20 float f = SkHalfToFloat(sptr[i]); |
| 21 dptr[i] = SkToU8((int)(f * 255 + 0.5f)); |
| 22 } |
| 23 return dst; |
| 24 } |
| 25 |
| 26 static SkPMColor u16_to_pmcolor(uint64_t src) { |
| 27 SkPMColor dst; |
| 28 const uint16_t* sptr = reinterpret_cast<const uint16_t*>(&src); |
| 29 uint8_t* dptr = reinterpret_cast<uint8_t*>(&dst); |
| 30 for (int i = 0; i < 4; ++i) { |
| 31 dptr[i] = sptr[i] >> 8; |
| 32 } |
| 33 return dst; |
| 34 } |
| 35 |
| 36 static SkImage* new_u64_image(const SkBitmap& src, uint32_t flags) { |
| 37 SkBitmap dst; |
| 38 dst.allocN32Pixels(src.width(), src.height()); |
| 39 SkPixmap srcPM, dstPM; |
| 40 src.peekPixels(&srcPM); |
| 41 dst.peekPixels(&dstPM); |
| 42 |
| 43 for (int y = 0; y < srcPM.height(); ++y) { |
| 44 for (int x = 0; x < srcPM.width(); ++x) { |
| 45 uint64_t srcP = *srcPM.addr64(x, y); |
| 46 uint32_t* dstP = dstPM.writable_addr32(x, y); |
| 47 |
| 48 if (flags & SkXfermode::kDstIsFloat16_U64Flag) { |
| 49 *dstP = f16_to_pmcolor(srcP); |
| 50 } else { |
| 51 *dstP = u16_to_pmcolor(srcP); |
| 52 } |
| 53 } |
| 54 } |
| 55 return SkImage::NewRasterCopy(dstPM.info(), dstPM.addr(), dstPM.rowBytes()); |
| 56 } |
| 57 |
| 58 static void draw_rect(SkCanvas* canvas, const SkRect& r, SkColor c, uint32_t u64
_flags, |
| 59 const SkAlpha aa[]) { |
| 60 const SkIRect ir = r.round(); |
| 61 const SkImageInfo info = SkImageInfo::Make(ir.width(), ir.height(), |
| 62 kRGBA_F16_SkColorType, kPremul_Sk
AlphaType); |
| 63 |
| 64 SkBitmap bm; |
| 65 bm.allocPixels(info); |
| 66 SkPixmap pm; |
| 67 bm.peekPixels(&pm); |
| 68 memset(pm.writable_addr(), 0, pm.getSafeSize()); |
| 69 |
| 70 if (SkColorGetA(c) == 0xFF) { |
| 71 u64_flags |= SkXfermode::kSrcIsOpaque_PM4fFlag; |
| 72 } |
| 73 |
| 74 const SkXfermode::U64State state { nullptr, u64_flags }; |
| 75 |
| 76 const SkPM4f src = SkColor4f::FromColor(c).premul(); |
| 77 auto proc1 = SkXfermode::GetU64Proc1(SkXfermode::kSrcOver_Mode, u64_flags); |
| 78 for (int y = 0; y < ir.height()/2; ++y) { |
| 79 proc1(state, pm.writable_addr64(0, y), src, ir.width(), aa); |
| 80 } |
| 81 |
| 82 SkPM4f buffer[1000]; |
| 83 for (int i = 0; i < ir.width(); ++i) { |
| 84 buffer[i] = src; |
| 85 } |
| 86 auto procN = SkXfermode::GetU64ProcN(SkXfermode::kSrcOver_Mode, u64_flags); |
| 87 for (int y = ir.height()/2 + 1; y < ir.height(); ++y) { |
| 88 procN(state, pm.writable_addr64(0, y), buffer, ir.width(), aa); |
| 89 } |
| 90 |
| 91 SkAutoTUnref<SkImage> image(new_u64_image(bm, u64_flags)); |
| 92 canvas->drawImage(image, r.left(), r.top(), nullptr); |
| 93 } |
| 94 |
| 95 /* |
| 96 * Test SkXfer4fProcs directly for src-over, comparing them to current SkColor
blits. |
| 97 */ |
| 98 DEF_SIMPLE_GM(xfer_u64_srcover, canvas, 580, 760) { |
| 99 const int IW = 50; |
| 100 const SkScalar W = IW; |
| 101 const SkScalar H = 100; |
| 102 |
| 103 const int32_t flags[] = { |
| 104 -1, // normal |
| 105 0, // U16 components |
| 106 SkXfermode::kDstIsFloat16_U64Flag, // F16 components |
| 107 }; |
| 108 const SkColor colors[] = { |
| 109 SK_ColorBLACK, SK_ColorRED, SK_ColorGREEN, SK_ColorBLUE, |
| 110 0x88000000, 0x88FF0000, 0x8800FF00, 0x880000FF |
| 111 }; |
| 112 |
| 113 uint8_t aa_scanline[IW]; |
| 114 for (int i = 0; i < IW; ++i) { |
| 115 aa_scanline[i] = i * 255 / (IW - 1); |
| 116 } |
| 117 uint8_t const* aa_table[] = { nullptr, aa_scanline }; |
| 118 |
| 119 SkBitmap mask; |
| 120 mask.installPixels(SkImageInfo::MakeA8(IW, 1), aa_scanline, IW); |
| 121 |
| 122 canvas->translate(20, 20); |
| 123 |
| 124 const SkRect r = SkRect::MakeWH(W, H); |
| 125 for (const uint8_t* aa : aa_table) { |
| 126 canvas->save(); |
| 127 for (auto flag : flags) { |
| 128 canvas->save(); |
| 129 for (SkColor c : colors) { |
| 130 if (flag < 0) { |
| 131 SkPaint p; |
| 132 p.setColor(c); |
| 133 if (aa) { |
| 134 canvas->drawBitmapRect(mask, r, &p); |
| 135 } else { |
| 136 canvas->drawRect(r, p); |
| 137 } |
| 138 } else { |
| 139 draw_rect(canvas, r, c, flag, aa); |
| 140 } |
| 141 canvas->translate(W + 20, 0); |
| 142 } |
| 143 canvas->restore(); |
| 144 canvas->translate(0, H + 20); |
| 145 } |
| 146 canvas->restore(); |
| 147 canvas->translate(0, (H + 20) * SK_ARRAY_COUNT(flags) + 20); |
| 148 } |
| 149 } |
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