epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2006 The Android Open Source Project |
| 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 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 8 | |
| 9 | #include "SkCoreBlitters.h" |
| 10 | #include "SkColorPriv.h" |
| 11 | #include "SkShader.h" |
Mike Reed | d470673 | 2016-11-15 16:44:34 -0500 | [diff] [blame^] | 12 | #include "SkXfermodePriv.h" |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 13 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 14 | SkA8_Blitter::SkA8_Blitter(const SkPixmap& device, const SkPaint& paint) : INHERITED(device) { |
mike@reedtribe.org | eadc807 | 2011-04-09 19:28:43 +0000 | [diff] [blame] | 15 | fSrcA = paint.getAlpha(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 16 | } |
| 17 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 18 | const SkPixmap* SkA8_Blitter::justAnOpaqueColor(uint32_t* value) { |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 19 | if (255 == fSrcA) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 20 | *value = 255; |
| 21 | return &fDevice; |
| 22 | } |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 23 | return nullptr; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 24 | } |
| 25 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 26 | void SkA8_Blitter::blitH(int x, int y, int width) { |
| 27 | SkASSERT(x >= 0 && y >= 0 && |
| 28 | (unsigned)(x + width) <= (unsigned)fDevice.width()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 29 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 30 | if (fSrcA == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 31 | return; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 32 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 33 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 34 | uint8_t* device = fDevice.writable_addr8(x, y); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 35 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 36 | if (fSrcA == 255) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 37 | memset(device, 0xFF, width); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 38 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 39 | unsigned scale = 256 - SkAlpha255To256(fSrcA); |
| 40 | unsigned srcA = fSrcA; |
| 41 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 42 | for (int i = 0; i < width; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 43 | device[i] = SkToU8(srcA + SkAlphaMul(device[i], scale)); |
| 44 | } |
| 45 | } |
| 46 | } |
| 47 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 48 | void SkA8_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], |
| 49 | const int16_t runs[]) { |
| 50 | if (fSrcA == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 51 | return; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 52 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 53 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 54 | uint8_t* device = fDevice.writable_addr8(x, y); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 55 | unsigned srcA = fSrcA; |
| 56 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 57 | for (;;) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 58 | int count = runs[0]; |
| 59 | SkASSERT(count >= 0); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 60 | if (count == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 61 | return; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 62 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 63 | unsigned aa = antialias[0]; |
| 64 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 65 | if (aa == 255 && srcA == 255) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 66 | memset(device, 0xFF, count); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 67 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 68 | unsigned sa = SkAlphaMul(srcA, SkAlpha255To256(aa)); |
| 69 | unsigned scale = 256 - sa; |
| 70 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 71 | for (int i = 0; i < count; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 72 | device[i] = SkToU8(sa + SkAlphaMul(device[i], scale)); |
| 73 | } |
| 74 | } |
| 75 | runs += count; |
| 76 | antialias += count; |
| 77 | device += count; |
| 78 | } |
| 79 | } |
| 80 | |
| 81 | ///////////////////////////////////////////////////////////////////////////////////// |
| 82 | |
| 83 | #define solid_8_pixels(mask, dst) \ |
| 84 | do { \ |
| 85 | if (mask & 0x80) dst[0] = 0xFF; \ |
| 86 | if (mask & 0x40) dst[1] = 0xFF; \ |
| 87 | if (mask & 0x20) dst[2] = 0xFF; \ |
| 88 | if (mask & 0x10) dst[3] = 0xFF; \ |
| 89 | if (mask & 0x08) dst[4] = 0xFF; \ |
| 90 | if (mask & 0x04) dst[5] = 0xFF; \ |
| 91 | if (mask & 0x02) dst[6] = 0xFF; \ |
| 92 | if (mask & 0x01) dst[7] = 0xFF; \ |
| 93 | } while (0) |
| 94 | |
| 95 | #define SK_BLITBWMASK_NAME SkA8_BlitBW |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 96 | #define SK_BLITBWMASK_ARGS |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 97 | #define SK_BLITBWMASK_BLIT8(mask, dst) solid_8_pixels(mask, dst) |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 98 | #define SK_BLITBWMASK_GETADDR writable_addr8 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 99 | #define SK_BLITBWMASK_DEVTYPE uint8_t |
| 100 | #include "SkBlitBWMaskTemplate.h" |
| 101 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 102 | static inline void blend_8_pixels(U8CPU bw, uint8_t dst[], U8CPU sa, |
| 103 | unsigned dst_scale) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 104 | if (bw & 0x80) dst[0] = SkToU8(sa + SkAlphaMul(dst[0], dst_scale)); |
| 105 | if (bw & 0x40) dst[1] = SkToU8(sa + SkAlphaMul(dst[1], dst_scale)); |
| 106 | if (bw & 0x20) dst[2] = SkToU8(sa + SkAlphaMul(dst[2], dst_scale)); |
| 107 | if (bw & 0x10) dst[3] = SkToU8(sa + SkAlphaMul(dst[3], dst_scale)); |
| 108 | if (bw & 0x08) dst[4] = SkToU8(sa + SkAlphaMul(dst[4], dst_scale)); |
| 109 | if (bw & 0x04) dst[5] = SkToU8(sa + SkAlphaMul(dst[5], dst_scale)); |
| 110 | if (bw & 0x02) dst[6] = SkToU8(sa + SkAlphaMul(dst[6], dst_scale)); |
| 111 | if (bw & 0x01) dst[7] = SkToU8(sa + SkAlphaMul(dst[7], dst_scale)); |
| 112 | } |
| 113 | |
| 114 | #define SK_BLITBWMASK_NAME SkA8_BlendBW |
| 115 | #define SK_BLITBWMASK_ARGS , U8CPU sa, unsigned dst_scale |
| 116 | #define SK_BLITBWMASK_BLIT8(mask, dst) blend_8_pixels(mask, dst, sa, dst_scale) |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 117 | #define SK_BLITBWMASK_GETADDR writable_addr8 |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 118 | #define SK_BLITBWMASK_DEVTYPE uint8_t |
| 119 | #include "SkBlitBWMaskTemplate.h" |
| 120 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 121 | void SkA8_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| 122 | if (fSrcA == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 123 | return; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 124 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 125 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 126 | if (mask.fFormat == SkMask::kBW_Format) { |
| 127 | if (fSrcA == 0xFF) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 128 | SkA8_BlitBW(fDevice, mask, clip); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 129 | } else { |
| 130 | SkA8_BlendBW(fDevice, mask, clip, fSrcA, |
| 131 | SkAlpha255To256(255 - fSrcA)); |
| 132 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 133 | return; |
| 134 | } |
| 135 | |
| 136 | int x = clip.fLeft; |
| 137 | int y = clip.fTop; |
| 138 | int width = clip.width(); |
| 139 | int height = clip.height(); |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 140 | uint8_t* device = fDevice.writable_addr8(x, y); |
reed@google.com | 7989186 | 2011-10-18 15:44:57 +0000 | [diff] [blame] | 141 | const uint8_t* alpha = mask.getAddr8(x, y); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 142 | unsigned srcA = fSrcA; |
| 143 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 144 | while (--height >= 0) { |
| 145 | for (int i = width - 1; i >= 0; --i) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 146 | unsigned sa; |
| 147 | // scale our src by the alpha value |
| 148 | { |
| 149 | int aa = alpha[i]; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 150 | if (aa == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 151 | continue; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 152 | } |
| 153 | if (aa == 255) { |
| 154 | if (srcA == 255) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 155 | device[i] = 0xFF; |
| 156 | continue; |
| 157 | } |
| 158 | sa = srcA; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 159 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 160 | sa = SkAlphaMul(srcA, SkAlpha255To256(aa)); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 161 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | int scale = 256 - SkAlpha255To256(sa); |
| 165 | device[i] = SkToU8(sa + SkAlphaMul(device[i], scale)); |
| 166 | } |
| 167 | device += fDevice.rowBytes(); |
| 168 | alpha += mask.fRowBytes; |
| 169 | } |
| 170 | } |
| 171 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 172 | /////////////////////////////////////////////////////////////////////////////// |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 173 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 174 | void SkA8_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { |
| 175 | if (fSrcA == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 176 | return; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 177 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 178 | |
| 179 | unsigned sa = SkAlphaMul(fSrcA, SkAlpha255To256(alpha)); |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 180 | uint8_t* device = fDevice.writable_addr8(x, y); |
scroggo@google.com | e5f4824 | 2013-02-25 21:47:41 +0000 | [diff] [blame] | 181 | size_t rowBytes = fDevice.rowBytes(); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 182 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 183 | if (sa == 0xFF) { |
| 184 | for (int i = 0; i < height; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 185 | *device = SkToU8(sa); |
| 186 | device += rowBytes; |
| 187 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 188 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 189 | unsigned scale = 256 - SkAlpha255To256(sa); |
| 190 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 191 | for (int i = 0; i < height; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 192 | *device = SkToU8(sa + SkAlphaMul(*device, scale)); |
| 193 | device += rowBytes; |
| 194 | } |
| 195 | } |
| 196 | } |
| 197 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 198 | void SkA8_Blitter::blitRect(int x, int y, int width, int height) { |
| 199 | SkASSERT(x >= 0 && y >= 0 && |
| 200 | (unsigned)(x + width) <= (unsigned)fDevice.width() && |
| 201 | (unsigned)(y + height) <= (unsigned)fDevice.height()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 202 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 203 | if (fSrcA == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 204 | return; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 205 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 206 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 207 | uint8_t* device = fDevice.writable_addr8(x, y); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 208 | unsigned srcA = fSrcA; |
| 209 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 210 | if (srcA == 255) { |
| 211 | while (--height >= 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 212 | memset(device, 0xFF, width); |
| 213 | device += fDevice.rowBytes(); |
| 214 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 215 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 216 | unsigned scale = 256 - SkAlpha255To256(srcA); |
| 217 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 218 | while (--height >= 0) { |
| 219 | for (int i = 0; i < width; i++) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 220 | device[i] = SkToU8(srcA + SkAlphaMul(device[i], scale)); |
| 221 | } |
| 222 | device += fDevice.rowBytes(); |
| 223 | } |
| 224 | } |
| 225 | } |
| 226 | |
| 227 | /////////////////////////////////////////////////////////////////////// |
| 228 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 229 | SkA8_Shader_Blitter::SkA8_Shader_Blitter(const SkPixmap& device, const SkPaint& paint, |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 230 | SkShader::Context* shaderContext) |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 231 | : INHERITED(device, paint, shaderContext) |
| 232 | { |
reed | 374772b | 2016-10-05 17:33:02 -0700 | [diff] [blame] | 233 | fXfermode = SkXfermode::Peek(paint.getBlendMode()); |
| 234 | SkASSERT(!fXfermode || fShaderContext); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 235 | |
| 236 | int width = device.width(); |
| 237 | fBuffer = (SkPMColor*)sk_malloc_throw(sizeof(SkPMColor) * (width + (SkAlign4(width) >> 2))); |
| 238 | fAAExpand = (uint8_t*)(fBuffer + width); |
| 239 | } |
| 240 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 241 | SkA8_Shader_Blitter::~SkA8_Shader_Blitter() { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 242 | sk_free(fBuffer); |
| 243 | } |
| 244 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 245 | void SkA8_Shader_Blitter::blitH(int x, int y, int width) { |
| 246 | SkASSERT(x >= 0 && y >= 0 && |
| 247 | (unsigned)(x + width) <= (unsigned)fDevice.width()); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 248 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 249 | uint8_t* device = fDevice.writable_addr8(x, y); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 250 | SkShader::Context* shaderContext = fShaderContext; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 251 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 252 | if ((shaderContext->getFlags() & SkShader::kOpaqueAlpha_Flag) && !fXfermode) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 253 | memset(device, 0xFF, width); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 254 | } else { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 255 | SkPMColor* span = fBuffer; |
| 256 | |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 257 | shaderContext->shadeSpan(x, y, span, width); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 258 | if (fXfermode) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 259 | fXfermode->xferA8(device, span, width, nullptr); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 260 | } else { |
| 261 | for (int i = width - 1; i >= 0; --i) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 262 | unsigned srcA = SkGetPackedA32(span[i]); |
| 263 | unsigned scale = 256 - SkAlpha255To256(srcA); |
| 264 | |
| 265 | device[i] = SkToU8(srcA + SkAlphaMul(device[i], scale)); |
| 266 | } |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 271 | static inline uint8_t aa_blend8(SkPMColor src, U8CPU da, int aa) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 272 | SkASSERT((unsigned)aa <= 255); |
| 273 | |
| 274 | int src_scale = SkAlpha255To256(aa); |
| 275 | int sa = SkGetPackedA32(src); |
lsalzman | 40254c2 | 2016-08-05 11:48:45 -0700 | [diff] [blame] | 276 | int dst_scale = SkAlphaMulInv256(sa, src_scale); |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 277 | |
| 278 | return SkToU8((sa * src_scale + da * dst_scale) >> 8); |
| 279 | } |
| 280 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 281 | void SkA8_Shader_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], |
| 282 | const int16_t runs[]) { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 283 | SkShader::Context* shaderContext = fShaderContext; |
| 284 | SkXfermode* mode = fXfermode; |
| 285 | uint8_t* aaExpand = fAAExpand; |
| 286 | SkPMColor* span = fBuffer; |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 287 | uint8_t* device = fDevice.writable_addr8(x, y); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 288 | int opaque = shaderContext->getFlags() & SkShader::kOpaqueAlpha_Flag; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 289 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 290 | for (;;) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 291 | int count = *runs; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 292 | if (count == 0) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 293 | break; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 294 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 295 | int aa = *antialias; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 296 | if (aa) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 297 | if (opaque && aa == 255 && mode == nullptr) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 298 | memset(device, 0xFF, count); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 299 | } else { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 300 | shaderContext->shadeSpan(x, y, span, count); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 301 | if (mode) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 302 | memset(aaExpand, aa, count); |
| 303 | mode->xferA8(device, span, count, aaExpand); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 304 | } else { |
| 305 | for (int i = count - 1; i >= 0; --i) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 306 | device[i] = aa_blend8(span[i], device[i], aa); |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 307 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 308 | } |
| 309 | } |
| 310 | } |
| 311 | device += count; |
| 312 | runs += count; |
| 313 | antialias += count; |
| 314 | x += count; |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 315 | } |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 316 | } |
| 317 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 318 | void SkA8_Shader_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| 319 | if (mask.fFormat == SkMask::kBW_Format) { |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 320 | this->INHERITED::blitMask(mask, clip); |
| 321 | return; |
| 322 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 323 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 324 | int x = clip.fLeft; |
| 325 | int y = clip.fTop; |
| 326 | int width = clip.width(); |
| 327 | int height = clip.height(); |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 328 | uint8_t* device = fDevice.writable_addr8(x, y); |
reed@google.com | 7989186 | 2011-10-18 15:44:57 +0000 | [diff] [blame] | 329 | const uint8_t* alpha = mask.getAddr8(x, y); |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 330 | SkShader::Context* shaderContext = fShaderContext; |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 331 | |
| 332 | SkPMColor* span = fBuffer; |
| 333 | |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 334 | while (--height >= 0) { |
commit-bot@chromium.org | 87fcd95 | 2014-04-23 19:10:51 +0000 | [diff] [blame] | 335 | shaderContext->shadeSpan(x, y, span, width); |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 336 | if (fXfermode) { |
| 337 | fXfermode->xferA8(device, span, width, alpha); |
commit-bot@chromium.org | 96583db | 2013-08-15 18:16:07 +0000 | [diff] [blame] | 338 | } else { |
| 339 | for (int i = width - 1; i >= 0; --i) { |
| 340 | device[i] = aa_blend8(span[i], device[i], alpha[i]); |
| 341 | } |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 342 | } |
reed@google.com | 82065d6 | 2011-02-07 15:30:46 +0000 | [diff] [blame] | 343 | |
reed@android.com | 8a1c16f | 2008-12-17 15:59:43 +0000 | [diff] [blame] | 344 | y += 1; |
| 345 | device += fDevice.rowBytes(); |
| 346 | alpha += mask.fRowBytes; |
| 347 | } |
| 348 | } |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 349 | |
| 350 | /////////////////////////////////////////////////////////////////////////////// |
| 351 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 352 | SkA8_Coverage_Blitter::SkA8_Coverage_Blitter(const SkPixmap& device, |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 353 | const SkPaint& paint) : SkRasterBlitter(device) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 354 | SkASSERT(nullptr == paint.getShader()); |
reed | 374772b | 2016-10-05 17:33:02 -0700 | [diff] [blame] | 355 | SkASSERT(paint.isSrcOver()); |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 356 | SkASSERT(nullptr == paint.getColorFilter()); |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 357 | } |
| 358 | |
| 359 | void SkA8_Coverage_Blitter::blitAntiH(int x, int y, const SkAlpha antialias[], |
| 360 | const int16_t runs[]) { |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 361 | uint8_t* device = fDevice.writable_addr8(x, y); |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 362 | SkDEBUGCODE(int totalCount = 0;) |
skia.committer@gmail.com | ab7442c | 2013-11-08 07:01:56 +0000 | [diff] [blame] | 363 | |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 364 | for (;;) { |
| 365 | int count = runs[0]; |
| 366 | SkASSERT(count >= 0); |
| 367 | if (count == 0) { |
| 368 | return; |
| 369 | } |
reed@google.com | b95d9f5 | 2013-11-08 17:50:14 +0000 | [diff] [blame] | 370 | if (antialias[0]) { |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 371 | memset(device, antialias[0], count); |
| 372 | } |
| 373 | runs += count; |
| 374 | antialias += count; |
| 375 | device += count; |
| 376 | |
| 377 | SkDEBUGCODE(totalCount += count;) |
| 378 | } |
| 379 | SkASSERT(fDevice.width() == totalCount); |
| 380 | } |
| 381 | |
| 382 | void SkA8_Coverage_Blitter::blitH(int x, int y, int width) { |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 383 | memset(fDevice.writable_addr8(x, y), 0xFF, width); |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | void SkA8_Coverage_Blitter::blitV(int x, int y, int height, SkAlpha alpha) { |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 387 | if (0 == alpha) { |
| 388 | return; |
| 389 | } |
reed@google.com | b95d9f5 | 2013-11-08 17:50:14 +0000 | [diff] [blame] | 390 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 391 | uint8_t* dst = fDevice.writable_addr8(x, y); |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 392 | const size_t dstRB = fDevice.rowBytes(); |
| 393 | while (--height >= 0) { |
| 394 | *dst = alpha; |
| 395 | dst += dstRB; |
| 396 | } |
| 397 | } |
| 398 | |
| 399 | void SkA8_Coverage_Blitter::blitRect(int x, int y, int width, int height) { |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 400 | uint8_t* dst = fDevice.writable_addr8(x, y); |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 401 | const size_t dstRB = fDevice.rowBytes(); |
| 402 | while (--height >= 0) { |
| 403 | memset(dst, 0xFF, width); |
| 404 | dst += dstRB; |
| 405 | } |
| 406 | } |
| 407 | |
| 408 | void SkA8_Coverage_Blitter::blitMask(const SkMask& mask, const SkIRect& clip) { |
| 409 | SkASSERT(SkMask::kA8_Format == mask.fFormat); |
| 410 | |
| 411 | int x = clip.fLeft; |
| 412 | int y = clip.fTop; |
| 413 | int width = clip.width(); |
| 414 | int height = clip.height(); |
| 415 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 416 | uint8_t* dst = fDevice.writable_addr8(x, y); |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 417 | const uint8_t* src = mask.getAddr8(x, y); |
| 418 | const size_t srcRB = mask.fRowBytes; |
| 419 | const size_t dstRB = fDevice.rowBytes(); |
skia.committer@gmail.com | ab7442c | 2013-11-08 07:01:56 +0000 | [diff] [blame] | 420 | |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 421 | while (--height >= 0) { |
| 422 | memcpy(dst, src, width); |
| 423 | dst += dstRB; |
| 424 | src += srcRB; |
| 425 | } |
| 426 | } |
| 427 | |
reed | 41e010c | 2015-06-09 12:16:53 -0700 | [diff] [blame] | 428 | const SkPixmap* SkA8_Coverage_Blitter::justAnOpaqueColor(uint32_t*) { |
halcanary | 96fcdcc | 2015-08-27 07:41:13 -0700 | [diff] [blame] | 429 | return nullptr; |
reed@google.com | 126f7f5 | 2013-11-07 16:06:53 +0000 | [diff] [blame] | 430 | } |