epoger@google.com | ec3ed6a | 2011-07-28 14:26:00 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright 2011 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 | */ |
reed@google.com | 58af9a6 | 2011-10-12 13:43:52 +0000 | [diff] [blame] | 7 | |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 8 | #include "SkBlitRow.h" |
reed@google.com | 58af9a6 | 2011-10-12 13:43:52 +0000 | [diff] [blame] | 9 | #include "SkBlitMask.h" |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 10 | #include "SkColorPriv.h" |
| 11 | #include "SkUtils.h" |
| 12 | |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 13 | #define UNROLL |
| 14 | |
tomhudson@google.com | 8dd90a9 | 2012-03-19 13:49:50 +0000 | [diff] [blame] | 15 | SkBlitRow::ColorRectProc PlatformColorRectProcFactory(); |
| 16 | |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 17 | static void S32_Opaque_BlitRow32(SkPMColor* SK_RESTRICT dst, |
| 18 | const SkPMColor* SK_RESTRICT src, |
| 19 | int count, U8CPU alpha) { |
| 20 | SkASSERT(255 == alpha); |
| 21 | memcpy(dst, src, count * sizeof(SkPMColor)); |
| 22 | } |
| 23 | |
| 24 | static void S32_Blend_BlitRow32(SkPMColor* SK_RESTRICT dst, |
| 25 | const SkPMColor* SK_RESTRICT src, |
| 26 | int count, U8CPU alpha) { |
| 27 | SkASSERT(alpha <= 255); |
| 28 | if (count > 0) { |
| 29 | unsigned src_scale = SkAlpha255To256(alpha); |
| 30 | unsigned dst_scale = 256 - src_scale; |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 31 | |
| 32 | #ifdef UNROLL |
| 33 | if (count & 1) { |
| 34 | *dst = SkAlphaMulQ(*(src++), src_scale) + SkAlphaMulQ(*dst, dst_scale); |
| 35 | dst += 1; |
| 36 | count -= 1; |
| 37 | } |
| 38 | |
| 39 | const SkPMColor* SK_RESTRICT srcEnd = src + count; |
| 40 | while (src != srcEnd) { |
| 41 | *dst = SkAlphaMulQ(*(src++), src_scale) + SkAlphaMulQ(*dst, dst_scale); |
| 42 | dst += 1; |
| 43 | *dst = SkAlphaMulQ(*(src++), src_scale) + SkAlphaMulQ(*dst, dst_scale); |
| 44 | dst += 1; |
| 45 | } |
| 46 | #else |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 47 | do { |
| 48 | *dst = SkAlphaMulQ(*src, src_scale) + SkAlphaMulQ(*dst, dst_scale); |
| 49 | src += 1; |
| 50 | dst += 1; |
| 51 | } while (--count > 0); |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 52 | #endif |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 53 | } |
| 54 | } |
| 55 | |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 56 | static void S32A_Opaque_BlitRow32(SkPMColor* SK_RESTRICT dst, |
| 57 | const SkPMColor* SK_RESTRICT src, |
| 58 | int count, U8CPU alpha) { |
| 59 | SkASSERT(255 == alpha); |
| 60 | if (count > 0) { |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 61 | #ifdef UNROLL |
| 62 | if (count & 1) { |
| 63 | *dst = SkPMSrcOver(*(src++), *dst); |
| 64 | dst += 1; |
| 65 | count -= 1; |
| 66 | } |
| 67 | |
| 68 | const SkPMColor* SK_RESTRICT srcEnd = src + count; |
| 69 | while (src != srcEnd) { |
| 70 | *dst = SkPMSrcOver(*(src++), *dst); |
| 71 | dst += 1; |
| 72 | *dst = SkPMSrcOver(*(src++), *dst); |
| 73 | dst += 1; |
| 74 | } |
| 75 | #else |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 76 | do { |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 77 | *dst = SkPMSrcOver(*src, *dst); |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 78 | src += 1; |
| 79 | dst += 1; |
| 80 | } while (--count > 0); |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 81 | #endif |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 82 | } |
| 83 | } |
| 84 | |
| 85 | static void S32A_Blend_BlitRow32(SkPMColor* SK_RESTRICT dst, |
| 86 | const SkPMColor* SK_RESTRICT src, |
| 87 | int count, U8CPU alpha) { |
| 88 | SkASSERT(alpha <= 255); |
| 89 | if (count > 0) { |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 90 | #ifdef UNROLL |
| 91 | if (count & 1) { |
| 92 | *dst = SkBlendARGB32(*(src++), *dst, alpha); |
| 93 | dst += 1; |
| 94 | count -= 1; |
| 95 | } |
| 96 | |
| 97 | const SkPMColor* SK_RESTRICT srcEnd = src + count; |
| 98 | while (src != srcEnd) { |
| 99 | *dst = SkBlendARGB32(*(src++), *dst, alpha); |
| 100 | dst += 1; |
| 101 | *dst = SkBlendARGB32(*(src++), *dst, alpha); |
| 102 | dst += 1; |
| 103 | } |
| 104 | #else |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 105 | do { |
| 106 | *dst = SkBlendARGB32(*src, *dst, alpha); |
| 107 | src += 1; |
| 108 | dst += 1; |
| 109 | } while (--count > 0); |
djsollen@google.com | 57f4969 | 2011-02-23 20:46:31 +0000 | [diff] [blame] | 110 | #endif |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 111 | } |
| 112 | } |
| 113 | |
| 114 | /////////////////////////////////////////////////////////////////////////////// |
| 115 | |
| 116 | static const SkBlitRow::Proc32 gDefault_Procs32[] = { |
| 117 | S32_Opaque_BlitRow32, |
| 118 | S32_Blend_BlitRow32, |
| 119 | S32A_Opaque_BlitRow32, |
| 120 | S32A_Blend_BlitRow32 |
| 121 | }; |
| 122 | |
| 123 | SkBlitRow::Proc32 SkBlitRow::Factory32(unsigned flags) { |
| 124 | SkASSERT(flags < SK_ARRAY_COUNT(gDefault_Procs32)); |
| 125 | // just so we don't crash |
| 126 | flags &= kFlags32_Mask; |
reed@google.com | 981d479 | 2011-03-09 12:55:47 +0000 | [diff] [blame] | 127 | |
senorblanco@chromium.org | 9272761 | 2009-11-04 20:51:06 +0000 | [diff] [blame] | 128 | SkBlitRow::Proc32 proc = PlatformProcs32(flags); |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 129 | if (NULL == proc) { |
| 130 | proc = gDefault_Procs32[flags]; |
| 131 | } |
| 132 | SkASSERT(proc); |
| 133 | return proc; |
| 134 | } |
| 135 | |
senorblanco@chromium.org | 29e5054 | 2010-12-16 19:07:45 +0000 | [diff] [blame] | 136 | SkBlitRow::Proc32 SkBlitRow::ColorProcFactory() { |
senorblanco@chromium.org | c385638 | 2010-12-13 15:27:20 +0000 | [diff] [blame] | 137 | SkBlitRow::ColorProc proc = PlatformColorProc(); |
| 138 | if (NULL == proc) { |
senorblanco@chromium.org | 29e5054 | 2010-12-16 19:07:45 +0000 | [diff] [blame] | 139 | proc = Color32; |
senorblanco@chromium.org | c385638 | 2010-12-13 15:27:20 +0000 | [diff] [blame] | 140 | } |
senorblanco@chromium.org | 29e5054 | 2010-12-16 19:07:45 +0000 | [diff] [blame] | 141 | SkASSERT(proc); |
| 142 | return proc; |
senorblanco@chromium.org | c385638 | 2010-12-13 15:27:20 +0000 | [diff] [blame] | 143 | } |
| 144 | |
reed@google.com | f2068ad | 2011-09-13 13:56:57 +0000 | [diff] [blame] | 145 | void SkBlitRow::Color32(SkPMColor* SK_RESTRICT dst, |
| 146 | const SkPMColor* SK_RESTRICT src, |
senorblanco@chromium.org | 29e5054 | 2010-12-16 19:07:45 +0000 | [diff] [blame] | 147 | int count, SkPMColor color) { |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 148 | if (count > 0) { |
| 149 | if (0 == color) { |
| 150 | if (src != dst) { |
| 151 | memcpy(dst, src, count * sizeof(SkPMColor)); |
| 152 | } |
reed@google.com | c909a1e | 2011-10-25 19:07:23 +0000 | [diff] [blame] | 153 | return; |
reed@android.com | c4cae85 | 2009-09-23 15:06:10 +0000 | [diff] [blame] | 154 | } |
| 155 | unsigned colorA = SkGetPackedA32(color); |
| 156 | if (255 == colorA) { |
| 157 | sk_memset32(dst, color, count); |
| 158 | } else { |
| 159 | unsigned scale = 256 - SkAlpha255To256(colorA); |
| 160 | do { |
| 161 | *dst = color + SkAlphaMulQ(*src, scale); |
| 162 | src += 1; |
| 163 | dst += 1; |
| 164 | } while (--count); |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | |
reed@google.com | 9f63667 | 2012-05-15 13:07:48 +0000 | [diff] [blame] | 169 | template <size_t N> void assignLoop(SkPMColor* dst, SkPMColor color) { |
| 170 | for (size_t i = 0; i < N; ++i) { |
| 171 | *dst++ = color; |
| 172 | } |
| 173 | } |
| 174 | |
| 175 | static inline void assignLoop(SkPMColor dst[], SkPMColor color, int count) { |
| 176 | while (count >= 4) { |
| 177 | *dst++ = color; |
| 178 | *dst++ = color; |
| 179 | *dst++ = color; |
| 180 | *dst++ = color; |
| 181 | count -= 4; |
| 182 | } |
| 183 | if (count >= 2) { |
| 184 | *dst++ = color; |
| 185 | *dst++ = color; |
| 186 | count -= 2; |
| 187 | } |
| 188 | if (count > 0) { |
| 189 | *dst++ = color; |
| 190 | } |
| 191 | } |
| 192 | |
tomhudson@google.com | 8dd90a9 | 2012-03-19 13:49:50 +0000 | [diff] [blame] | 193 | void SkBlitRow::ColorRect32(SkPMColor* dst, int width, int height, |
| 194 | size_t rowBytes, SkPMColor color) { |
reed@google.com | 9f63667 | 2012-05-15 13:07:48 +0000 | [diff] [blame] | 195 | if (width <= 0 || height <= 0 || 0 == color) { |
| 196 | return; |
| 197 | } |
| 198 | |
| 199 | // Just made up this value, since I saw it once in a SSE2 file. |
| 200 | // We should consider writing some tests to find the optimimal break-point |
| 201 | // (or query the Platform proc?) |
| 202 | static const int MIN_WIDTH_FOR_SCANLINE_PROC = 32; |
| 203 | |
| 204 | bool isOpaque = (0xFF == SkGetPackedA32(color)); |
| 205 | |
| 206 | if (!isOpaque || width >= MIN_WIDTH_FOR_SCANLINE_PROC) { |
| 207 | SkBlitRow::ColorProc proc = SkBlitRow::ColorProcFactory(); |
| 208 | while (--height >= 0) { |
| 209 | (*proc)(dst, dst, width, color); |
| 210 | dst = (SkPMColor*) ((char*)dst + rowBytes); |
| 211 | } |
| 212 | } else { |
| 213 | switch (width) { |
| 214 | case 1: |
| 215 | while (--height >= 0) { |
| 216 | assignLoop<1>(dst, color); |
| 217 | dst = (SkPMColor*) ((char*)dst + rowBytes); |
| 218 | } |
| 219 | break; |
| 220 | case 2: |
| 221 | while (--height >= 0) { |
| 222 | assignLoop<2>(dst, color); |
| 223 | dst = (SkPMColor*) ((char*)dst + rowBytes); |
| 224 | } |
| 225 | break; |
| 226 | case 3: |
| 227 | while (--height >= 0) { |
| 228 | assignLoop<3>(dst, color); |
| 229 | dst = (SkPMColor*) ((char*)dst + rowBytes); |
| 230 | } |
| 231 | break; |
| 232 | default: |
| 233 | while (--height >= 0) { |
| 234 | assignLoop(dst, color, width); |
| 235 | dst = (SkPMColor*) ((char*)dst + rowBytes); |
| 236 | } |
| 237 | break; |
| 238 | } |
tomhudson@google.com | 8dd90a9 | 2012-03-19 13:49:50 +0000 | [diff] [blame] | 239 | } |
| 240 | } |
| 241 | |
| 242 | SkBlitRow::ColorRectProc SkBlitRow::ColorRectProcFactory() { |
| 243 | SkBlitRow::ColorRectProc proc = PlatformColorRectProcFactory(); |
| 244 | if (NULL == proc) { |
| 245 | proc = ColorRect32; |
| 246 | } |
| 247 | SkASSERT(proc); |
| 248 | return proc; |
| 249 | } |