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| <h1>include/core/SkDither.h</h1><a href="_sk_dither_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span> |
| <a name="l00002"></a>00002 <span class="comment"> * Copyright (C) 2008 The Android Open Source Project</span> |
| <a name="l00003"></a>00003 <span class="comment"> *</span> |
| <a name="l00004"></a>00004 <span class="comment"> * Licensed under the Apache License, Version 2.0 (the "License");</span> |
| <a name="l00005"></a>00005 <span class="comment"> * you may not use this file except in compliance with the License.</span> |
| <a name="l00006"></a>00006 <span class="comment"> * You may obtain a copy of the License at</span> |
| <a name="l00007"></a>00007 <span class="comment"> *</span> |
| <a name="l00008"></a>00008 <span class="comment"> * http://www.apache.org/licenses/LICENSE-2.0</span> |
| <a name="l00009"></a>00009 <span class="comment"> *</span> |
| <a name="l00010"></a>00010 <span class="comment"> * Unless required by applicable law or agreed to in writing, software</span> |
| <a name="l00011"></a>00011 <span class="comment"> * distributed under the License is distributed on an "AS IS" BASIS,</span> |
| <a name="l00012"></a>00012 <span class="comment"> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span> |
| <a name="l00013"></a>00013 <span class="comment"> * See the License for the specific language governing permissions and</span> |
| <a name="l00014"></a>00014 <span class="comment"> * limitations under the License.</span> |
| <a name="l00015"></a>00015 <span class="comment"> */</span> |
| <a name="l00016"></a>00016 |
| <a name="l00017"></a>00017 <span class="preprocessor">#ifndef SkDither_DEFINED</span> |
| <a name="l00018"></a>00018 <span class="preprocessor"></span><span class="preprocessor">#define SkDither_DEFINED</span> |
| <a name="l00019"></a>00019 <span class="preprocessor"></span> |
| <a name="l00020"></a>00020 <span class="preprocessor">#include "<a class="code" href="_sk_color_priv_8h.html">SkColorPriv.h</a>"</span> |
| <a name="l00021"></a>00021 |
| <a name="l00022"></a><a class="code" href="_sk_dither_8h.html#a0655b8d600b7ef09c2010a4c8e99a82a">00022</a> <span class="preprocessor">#define SK_DitherValueMax4444 15</span> |
| <a name="l00023"></a><a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">00023</a> <span class="preprocessor"></span><span class="preprocessor">#define SK_DitherValueMax565 7</span> |
| <a name="l00024"></a>00024 <span class="preprocessor"></span> |
| <a name="l00025"></a>00025 <span class="comment">/* need to use macros for bit-counts for each component, and then</span> |
| <a name="l00026"></a>00026 <span class="comment"> move these into SkColorPriv.h</span> |
| <a name="l00027"></a>00027 <span class="comment">*/</span> |
| <a name="l00028"></a>00028 |
| <a name="l00029"></a><a class="code" href="_sk_dither_8h.html#a8e99fe2ed417b22de427e826b5ca9d04">00029</a> <span class="preprocessor">#define SkDITHER_R32_FOR_565_MACRO(r, d) (r + d - (r >> 5))</span> |
| <a name="l00030"></a><a class="code" href="_sk_dither_8h.html#a77e0bc44a5e5da9a26c471d3816c83c1">00030</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_G32_FOR_565_MACRO(g, d) (g + (d >> 1) - (g >> 6))</span> |
| <a name="l00031"></a><a class="code" href="_sk_dither_8h.html#a94588409815e65378f3cc98e4169f802">00031</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_B32_FOR_565_MACRO(b, d) (b + d - (b >> 5))</span> |
| <a name="l00032"></a>00032 <span class="preprocessor"></span> |
| <a name="l00033"></a><a class="code" href="_sk_dither_8h.html#a3f548b6f084d0806e0ae766d89ed440f">00033</a> <span class="preprocessor">#define SkDITHER_A32_FOR_4444_MACRO(a, d) (a + 15 - (a >> 4))</span> |
| <a name="l00034"></a><a class="code" href="_sk_dither_8h.html#a161db2ccf416441e3ddb45a1d0c2deef">00034</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_R32_FOR_4444_MACRO(r, d) (r + d - (r >> 4))</span> |
| <a name="l00035"></a><a class="code" href="_sk_dither_8h.html#a098aed9a122361e2fb019fe81701aec0">00035</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_G32_FOR_4444_MACRO(g, d) (g + d - (g >> 4))</span> |
| <a name="l00036"></a><a class="code" href="_sk_dither_8h.html#ac3e6c029efa983b5defdfc2e8badf9f5">00036</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_B32_FOR_4444_MACRO(b, d) (b + d - (b >> 4))</span> |
| <a name="l00037"></a>00037 <span class="preprocessor"></span> |
| <a name="l00038"></a>00038 <span class="preprocessor">#ifdef SK_DEBUG</span> |
| <a name="l00039"></a>00039 <span class="preprocessor"></span> <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <a class="code" href="_sk_dither_8h.html#a4d8ac8e3f899581bb4adcbdc2fffd39d">SkDITHER_R32_FOR_565</a>(<span class="keywordtype">unsigned</span> r, <span class="keywordtype">unsigned</span> d) |
| <a name="l00040"></a>00040 { |
| <a name="l00041"></a>00041 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(d <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00042"></a>00042 <a class="code" href="_sk_color_priv_8h.html#a65ca55d525f84afb21a2f74a6002914d">SkA32Assert</a>(r); |
| <a name="l00043"></a>00043 r = <a class="code" href="_sk_dither_8h.html#a8e99fe2ed417b22de427e826b5ca9d04">SkDITHER_R32_FOR_565_MACRO</a>(r, d); |
| <a name="l00044"></a>00044 <a class="code" href="_sk_color_priv_8h.html#a65ca55d525f84afb21a2f74a6002914d">SkA32Assert</a>(r); |
| <a name="l00045"></a>00045 <span class="keywordflow">return</span> r; |
| <a name="l00046"></a>00046 } |
| <a name="l00047"></a>00047 <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <a class="code" href="_sk_dither_8h.html#aa92d393b96e2fa905fd41aadb51a8f4d">SkDITHER_G32_FOR_565</a>(<span class="keywordtype">unsigned</span> g, <span class="keywordtype">unsigned</span> d) |
| <a name="l00048"></a>00048 { |
| <a name="l00049"></a>00049 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(d <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00050"></a>00050 <a class="code" href="_sk_color_priv_8h.html#a7bb9afd3a06bdccd7a40f9cb61862e52">SkG32Assert</a>(g); |
| <a name="l00051"></a>00051 g = <a class="code" href="_sk_dither_8h.html#a77e0bc44a5e5da9a26c471d3816c83c1">SkDITHER_G32_FOR_565_MACRO</a>(g, d); |
| <a name="l00052"></a>00052 <a class="code" href="_sk_color_priv_8h.html#a7bb9afd3a06bdccd7a40f9cb61862e52">SkG32Assert</a>(g); |
| <a name="l00053"></a>00053 <span class="keywordflow">return</span> g; |
| <a name="l00054"></a>00054 } |
| <a name="l00055"></a>00055 <span class="keyword">inline</span> <span class="keywordtype">unsigned</span> <a class="code" href="_sk_dither_8h.html#a282fc87ce041e62ea04b447658e971ab">SkDITHER_B32_FOR_565</a>(<span class="keywordtype">unsigned</span> b, <span class="keywordtype">unsigned</span> d) |
| <a name="l00056"></a>00056 { |
| <a name="l00057"></a>00057 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(d <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00058"></a>00058 <a class="code" href="_sk_color_priv_8h.html#a042222d1a49ae6244bf8c77c8bc4c510">SkB32Assert</a>(b); |
| <a name="l00059"></a>00059 b = <a class="code" href="_sk_dither_8h.html#a94588409815e65378f3cc98e4169f802">SkDITHER_B32_FOR_565_MACRO</a>(b, d); |
| <a name="l00060"></a>00060 <a class="code" href="_sk_color_priv_8h.html#a042222d1a49ae6244bf8c77c8bc4c510">SkB32Assert</a>(b); |
| <a name="l00061"></a>00061 <span class="keywordflow">return</span> b; |
| <a name="l00062"></a>00062 } |
| <a name="l00063"></a>00063 <span class="preprocessor">#else</span> |
| <a name="l00064"></a><a class="code" href="_sk_dither_8h.html#a4d8ac8e3f899581bb4adcbdc2fffd39d">00064</a> <span class="preprocessor"></span><span class="preprocessor"> #define SkDITHER_R32_FOR_565(r, d) SkDITHER_R32_FOR_565_MACRO(r, d)</span> |
| <a name="l00065"></a><a class="code" href="_sk_dither_8h.html#aa92d393b96e2fa905fd41aadb51a8f4d">00065</a> <span class="preprocessor"></span><span class="preprocessor"> #define SkDITHER_G32_FOR_565(g, d) SkDITHER_G32_FOR_565_MACRO(g, d)</span> |
| <a name="l00066"></a><a class="code" href="_sk_dither_8h.html#a282fc87ce041e62ea04b447658e971ab">00066</a> <span class="preprocessor"></span><span class="preprocessor"> #define SkDITHER_B32_FOR_565(b, d) SkDITHER_B32_FOR_565_MACRO(b, d)</span> |
| <a name="l00067"></a>00067 <span class="preprocessor"></span><span class="preprocessor">#endif</span> |
| <a name="l00068"></a>00068 <span class="preprocessor"></span> |
| <a name="l00069"></a><a class="code" href="_sk_dither_8h.html#ad3f8644141223921975676f6fa0c5d36">00069</a> <span class="preprocessor">#define SkDITHER_R32To565(r, d) SkR32ToR16(SkDITHER_R32_FOR_565(r, d))</span> |
| <a name="l00070"></a><a class="code" href="_sk_dither_8h.html#aba3299dcf19cb534096c081e78926e31">00070</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_G32To565(g, d) SkG32ToG16(SkDITHER_G32_FOR_565(g, d))</span> |
| <a name="l00071"></a><a class="code" href="_sk_dither_8h.html#a02af0e529a744c30639ff38491c98d37">00071</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_B32To565(b, d) SkB32ToB16(SkDITHER_B32_FOR_565(b, d))</span> |
| <a name="l00072"></a>00072 <span class="preprocessor"></span> |
| <a name="l00073"></a><a class="code" href="_sk_dither_8h.html#acf4a2347a1f10cef5128d037700a3639">00073</a> <span class="preprocessor">#define SkDITHER_A32To4444(a, d) SkA32To4444(SkDITHER_A32_FOR_4444_MACRO(a, d))</span> |
| <a name="l00074"></a><a class="code" href="_sk_dither_8h.html#a56c3230758dad83db140e15ed634acf8">00074</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_R32To4444(r, d) SkR32To4444(SkDITHER_R32_FOR_4444_MACRO(r, d))</span> |
| <a name="l00075"></a><a class="code" href="_sk_dither_8h.html#a75430dd054fd7894ec87f8229b5dd5f6">00075</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_G32To4444(g, d) SkG32To4444(SkDITHER_G32_FOR_4444_MACRO(g, d))</span> |
| <a name="l00076"></a><a class="code" href="_sk_dither_8h.html#a092d3c97866846adae22c6de665fb1f7">00076</a> <span class="preprocessor"></span><span class="preprocessor">#define SkDITHER_B32To4444(b, d) SkB32To4444(SkDITHER_B32_FOR_4444_MACRO(b, d))</span> |
| <a name="l00077"></a>00077 <span class="preprocessor"></span> |
| <a name="l00078"></a>00078 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="_sk_color_8h.html#a9ec12bd74c4b63b5da802b419106b8ea">SkPMColor</a> SkDitherARGB32For565(<a class="code" href="_sk_color_8h.html#a9ec12bd74c4b63b5da802b419106b8ea">SkPMColor</a> c, <span class="keywordtype">unsigned</span> dither) |
| <a name="l00079"></a>00079 { |
| <a name="l00080"></a>00080 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(dither <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00081"></a>00081 |
| <a name="l00082"></a>00082 <span class="keywordtype">unsigned</span> sa = <a class="code" href="_sk_color_priv_8h.html#a876879a4f82e1ce0dd5783f65916e52d">SkGetPackedA32</a>(c); |
| <a name="l00083"></a>00083 dither = <a class="code" href="_sk_color_priv_8h.html#a667bfec98d457a5b88d70e9b4545fb4d">SkAlphaMul</a>(dither, SkAlpha255To256(sa)); |
| <a name="l00084"></a>00084 |
| <a name="l00085"></a>00085 <span class="keywordtype">unsigned</span> sr = <a class="code" href="_sk_color_priv_8h.html#a357259bace39e529e6f9467ab7de2a3b">SkGetPackedR32</a>(c); |
| <a name="l00086"></a>00086 <span class="keywordtype">unsigned</span> sg = <a class="code" href="_sk_color_priv_8h.html#a974c43f2a3277521e560dc9405c2487a">SkGetPackedG32</a>(c); |
| <a name="l00087"></a>00087 <span class="keywordtype">unsigned</span> sb = <a class="code" href="_sk_color_priv_8h.html#a2859981067b62e358f4db39f515b789f">SkGetPackedB32</a>(c); |
| <a name="l00088"></a>00088 sr = <a class="code" href="_sk_dither_8h.html#a4d8ac8e3f899581bb4adcbdc2fffd39d">SkDITHER_R32_FOR_565</a>(sr, dither); |
| <a name="l00089"></a>00089 sg = <a class="code" href="_sk_dither_8h.html#aa92d393b96e2fa905fd41aadb51a8f4d">SkDITHER_G32_FOR_565</a>(sg, dither); |
| <a name="l00090"></a>00090 sb = <a class="code" href="_sk_dither_8h.html#a282fc87ce041e62ea04b447658e971ab">SkDITHER_B32_FOR_565</a>(sb, dither); |
| <a name="l00091"></a>00091 |
| <a name="l00092"></a>00092 <span class="keywordflow">return</span> <a class="code" href="_sk_color_priv_8h.html#aba00d43af138a39690d543bef56574ce">SkPackARGB32</a>(sa, sr, sg, sb); |
| <a name="l00093"></a>00093 } |
| <a name="l00094"></a>00094 |
| <a name="l00095"></a>00095 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="_sk_color_8h.html#a9ec12bd74c4b63b5da802b419106b8ea">SkPMColor</a> SkDitherRGB32For565(<a class="code" href="_sk_color_8h.html#a9ec12bd74c4b63b5da802b419106b8ea">SkPMColor</a> c, <span class="keywordtype">unsigned</span> dither) |
| <a name="l00096"></a>00096 { |
| <a name="l00097"></a>00097 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(dither <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00098"></a>00098 |
| <a name="l00099"></a>00099 <span class="keywordtype">unsigned</span> sr = <a class="code" href="_sk_color_priv_8h.html#a357259bace39e529e6f9467ab7de2a3b">SkGetPackedR32</a>(c); |
| <a name="l00100"></a>00100 <span class="keywordtype">unsigned</span> sg = <a class="code" href="_sk_color_priv_8h.html#a974c43f2a3277521e560dc9405c2487a">SkGetPackedG32</a>(c); |
| <a name="l00101"></a>00101 <span class="keywordtype">unsigned</span> sb = <a class="code" href="_sk_color_priv_8h.html#a2859981067b62e358f4db39f515b789f">SkGetPackedB32</a>(c); |
| <a name="l00102"></a>00102 sr = <a class="code" href="_sk_dither_8h.html#a4d8ac8e3f899581bb4adcbdc2fffd39d">SkDITHER_R32_FOR_565</a>(sr, dither); |
| <a name="l00103"></a>00103 sg = <a class="code" href="_sk_dither_8h.html#aa92d393b96e2fa905fd41aadb51a8f4d">SkDITHER_G32_FOR_565</a>(sg, dither); |
| <a name="l00104"></a>00104 sb = <a class="code" href="_sk_dither_8h.html#a282fc87ce041e62ea04b447658e971ab">SkDITHER_B32_FOR_565</a>(sb, dither); |
| <a name="l00105"></a>00105 |
| <a name="l00106"></a>00106 <span class="keywordflow">return</span> <a class="code" href="_sk_color_priv_8h.html#aba00d43af138a39690d543bef56574ce">SkPackARGB32</a>(0xFF, sr, sg, sb); |
| <a name="l00107"></a>00107 } |
| <a name="l00108"></a>00108 |
| <a name="l00109"></a>00109 <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t SkDitherRGBTo565(<a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> r, <a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> g, <a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> b, |
| <a name="l00110"></a>00110 <span class="keywordtype">unsigned</span> dither) |
| <a name="l00111"></a>00111 { |
| <a name="l00112"></a>00112 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(dither <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00113"></a>00113 r = <a class="code" href="_sk_dither_8h.html#ad3f8644141223921975676f6fa0c5d36">SkDITHER_R32To565</a>(r, dither); |
| <a name="l00114"></a>00114 g = <a class="code" href="_sk_dither_8h.html#aba3299dcf19cb534096c081e78926e31">SkDITHER_G32To565</a>(g, dither); |
| <a name="l00115"></a>00115 b = <a class="code" href="_sk_dither_8h.html#a02af0e529a744c30639ff38491c98d37">SkDITHER_B32To565</a>(b, dither); |
| <a name="l00116"></a>00116 <span class="keywordflow">return</span> SkPackRGB16(r, g, b); |
| <a name="l00117"></a>00117 } |
| <a name="l00118"></a>00118 |
| <a name="l00119"></a>00119 <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t SkDitherRGB32To565(<a class="code" href="_sk_color_8h.html#a9ec12bd74c4b63b5da802b419106b8ea">SkPMColor</a> c, <span class="keywordtype">unsigned</span> dither) |
| <a name="l00120"></a>00120 { |
| <a name="l00121"></a>00121 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(dither <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00122"></a>00122 |
| <a name="l00123"></a>00123 <span class="keywordtype">unsigned</span> sr = <a class="code" href="_sk_color_priv_8h.html#a357259bace39e529e6f9467ab7de2a3b">SkGetPackedR32</a>(c); |
| <a name="l00124"></a>00124 <span class="keywordtype">unsigned</span> sg = <a class="code" href="_sk_color_priv_8h.html#a974c43f2a3277521e560dc9405c2487a">SkGetPackedG32</a>(c); |
| <a name="l00125"></a>00125 <span class="keywordtype">unsigned</span> sb = <a class="code" href="_sk_color_priv_8h.html#a2859981067b62e358f4db39f515b789f">SkGetPackedB32</a>(c); |
| <a name="l00126"></a>00126 sr = <a class="code" href="_sk_dither_8h.html#ad3f8644141223921975676f6fa0c5d36">SkDITHER_R32To565</a>(sr, dither); |
| <a name="l00127"></a>00127 sg = <a class="code" href="_sk_dither_8h.html#aba3299dcf19cb534096c081e78926e31">SkDITHER_G32To565</a>(sg, dither); |
| <a name="l00128"></a>00128 sb = <a class="code" href="_sk_dither_8h.html#a02af0e529a744c30639ff38491c98d37">SkDITHER_B32To565</a>(sb, dither); |
| <a name="l00129"></a>00129 |
| <a name="l00130"></a>00130 <span class="keywordflow">return</span> SkPackRGB16(sr, sg, sb); |
| <a name="l00131"></a>00131 } |
| <a name="l00132"></a>00132 |
| <a name="l00133"></a>00133 <span class="keyword">static</span> <span class="keyword">inline</span> uint16_t SkDitherARGB32To565(<a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> sa, <a class="code" href="_sk_color_8h.html#a9ec12bd74c4b63b5da802b419106b8ea">SkPMColor</a> c, <span class="keywordtype">unsigned</span> dither) |
| <a name="l00134"></a>00134 { |
| <a name="l00135"></a>00135 <a class="code" href="_sk_types_8h.html#acc82ca88a67ae7ce95a107a9a4b81123">SkASSERT</a>(dither <= <a class="code" href="_sk_dither_8h.html#a17e8549485804de992f4ad07a5d6b53a">SK_DitherValueMax565</a>); |
| <a name="l00136"></a>00136 dither = <a class="code" href="_sk_color_priv_8h.html#a667bfec98d457a5b88d70e9b4545fb4d">SkAlphaMul</a>(dither, SkAlpha255To256(sa)); |
| <a name="l00137"></a>00137 |
| <a name="l00138"></a>00138 <span class="keywordtype">unsigned</span> sr = <a class="code" href="_sk_color_priv_8h.html#a357259bace39e529e6f9467ab7de2a3b">SkGetPackedR32</a>(c); |
| <a name="l00139"></a>00139 <span class="keywordtype">unsigned</span> sg = <a class="code" href="_sk_color_priv_8h.html#a974c43f2a3277521e560dc9405c2487a">SkGetPackedG32</a>(c); |
| <a name="l00140"></a>00140 <span class="keywordtype">unsigned</span> sb = <a class="code" href="_sk_color_priv_8h.html#a2859981067b62e358f4db39f515b789f">SkGetPackedB32</a>(c); |
| <a name="l00141"></a>00141 sr = <a class="code" href="_sk_dither_8h.html#ad3f8644141223921975676f6fa0c5d36">SkDITHER_R32To565</a>(sr, dither); |
| <a name="l00142"></a>00142 sg = <a class="code" href="_sk_dither_8h.html#aba3299dcf19cb534096c081e78926e31">SkDITHER_G32To565</a>(sg, dither); |
| <a name="l00143"></a>00143 sb = <a class="code" href="_sk_dither_8h.html#a02af0e529a744c30639ff38491c98d37">SkDITHER_B32To565</a>(sb, dither); |
| <a name="l00144"></a>00144 |
| <a name="l00145"></a>00145 <span class="keywordflow">return</span> SkPackRGB16(sr, sg, sb); |
| <a name="l00146"></a>00146 } |
| <a name="l00147"></a>00147 |
| <a name="l00149"></a>00149 |
| <a name="l00150"></a>00150 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="_sk_color_priv_8h.html#a7bf7cae47acf40afc4e11ccc12a06085">SkPMColor16</a> SkDitherARGB32To4444(<a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> a, <a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> r, <a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> g, |
| <a name="l00151"></a>00151 <a class="code" href="_sk_types_8h.html#a6882636f582abdb2a130b7e5ff38aa83">U8CPU</a> b, <span class="keywordtype">unsigned</span> dither) |
| <a name="l00152"></a>00152 { |
| <a name="l00153"></a>00153 dither = <a class="code" href="_sk_color_priv_8h.html#a667bfec98d457a5b88d70e9b4545fb4d">SkAlphaMul</a>(dither, SkAlpha255To256(a)); |
| <a name="l00154"></a>00154 |
| <a name="l00155"></a>00155 a = <a class="code" href="_sk_dither_8h.html#acf4a2347a1f10cef5128d037700a3639">SkDITHER_A32To4444</a>(a, dither); |
| <a name="l00156"></a>00156 r = <a class="code" href="_sk_dither_8h.html#a56c3230758dad83db140e15ed634acf8">SkDITHER_R32To4444</a>(r, dither); |
| <a name="l00157"></a>00157 g = <a class="code" href="_sk_dither_8h.html#a75430dd054fd7894ec87f8229b5dd5f6">SkDITHER_G32To4444</a>(g, dither); |
| <a name="l00158"></a>00158 b = <a class="code" href="_sk_dither_8h.html#a092d3c97866846adae22c6de665fb1f7">SkDITHER_B32To4444</a>(b, dither); |
| <a name="l00159"></a>00159 |
| <a name="l00160"></a>00160 <span class="keywordflow">return</span> SkPackARGB4444(a, r, g, b); |
| <a name="l00161"></a>00161 } |
| <a name="l00162"></a>00162 |
| <a name="l00163"></a>00163 <span class="keyword">static</span> <span class="keyword">inline</span> <a class="code" href="_sk_color_priv_8h.html#a7bf7cae47acf40afc4e11ccc12a06085">SkPMColor16</a> SkDitherARGB32To4444(<a class="code" href="_sk_color_8h.html#a9ec12bd74c4b63b5da802b419106b8ea">SkPMColor</a> c, <span class="keywordtype">unsigned</span> dither) |
| <a name="l00164"></a>00164 { |
| <a name="l00165"></a>00165 <span class="keywordtype">unsigned</span> a = <a class="code" href="_sk_color_priv_8h.html#a876879a4f82e1ce0dd5783f65916e52d">SkGetPackedA32</a>(c); |
| <a name="l00166"></a>00166 <span class="keywordtype">unsigned</span> r = <a class="code" href="_sk_color_priv_8h.html#a357259bace39e529e6f9467ab7de2a3b">SkGetPackedR32</a>(c); |
| <a name="l00167"></a>00167 <span class="keywordtype">unsigned</span> g = <a class="code" href="_sk_color_priv_8h.html#a974c43f2a3277521e560dc9405c2487a">SkGetPackedG32</a>(c); |
| <a name="l00168"></a>00168 <span class="keywordtype">unsigned</span> b = <a class="code" href="_sk_color_priv_8h.html#a2859981067b62e358f4db39f515b789f">SkGetPackedB32</a>(c); |
| <a name="l00169"></a>00169 |
| <a name="l00170"></a>00170 dither = <a class="code" href="_sk_color_priv_8h.html#a667bfec98d457a5b88d70e9b4545fb4d">SkAlphaMul</a>(dither, SkAlpha255To256(a)); |
| <a name="l00171"></a>00171 |
| <a name="l00172"></a>00172 a = <a class="code" href="_sk_dither_8h.html#acf4a2347a1f10cef5128d037700a3639">SkDITHER_A32To4444</a>(a, dither); |
| <a name="l00173"></a>00173 r = <a class="code" href="_sk_dither_8h.html#a56c3230758dad83db140e15ed634acf8">SkDITHER_R32To4444</a>(r, dither); |
| <a name="l00174"></a>00174 g = <a class="code" href="_sk_dither_8h.html#a75430dd054fd7894ec87f8229b5dd5f6">SkDITHER_G32To4444</a>(g, dither); |
| <a name="l00175"></a>00175 b = <a class="code" href="_sk_dither_8h.html#a092d3c97866846adae22c6de665fb1f7">SkDITHER_B32To4444</a>(b, dither); |
| <a name="l00176"></a>00176 |
| <a name="l00177"></a>00177 <span class="keywordflow">return</span> SkPackARGB4444(a, r, g, b); |
| <a name="l00178"></a>00178 } |
| <a name="l00179"></a>00179 |
| <a name="l00180"></a>00180 <span class="comment">// TODO: need dither routines for 565 -> 4444</span> |
| <a name="l00181"></a>00181 |
| <a name="l00182"></a>00182 <span class="comment">// this toggles between a 4x4 and a 1x4 array</span> |
| <a name="l00183"></a>00183 <span class="comment">//#define ENABLE_DITHER_MATRIX_4X4</span> |
| <a name="l00184"></a>00184 |
| <a name="l00185"></a>00185 <span class="preprocessor">#ifdef ENABLE_DITHER_MATRIX_4X4</span> |
| <a name="l00186"></a>00186 <span class="preprocessor"></span> <span class="keyword">extern</span> <span class="keyword">const</span> uint8_t gDitherMatrix_4Bit_4X4[4][4]; |
| <a name="l00187"></a>00187 <span class="keyword">extern</span> <span class="keyword">const</span> uint8_t gDitherMatrix_3Bit_4X4[4][4]; |
| <a name="l00188"></a>00188 |
| <a name="l00189"></a>00189 <span class="preprocessor"> #define DITHER_4444_SCAN(y) const uint8_t* dither_scan = gDitherMatrix_4Bit_4X4[(y) & 3]</span> |
| <a name="l00190"></a>00190 <span class="preprocessor"></span><span class="preprocessor"> #define DITHER_565_SCAN(y) const uint8_t* dither_scan = gDitherMatrix_3Bit_4X4[(y) & 3]</span> |
| <a name="l00191"></a>00191 <span class="preprocessor"></span> |
| <a name="l00192"></a>00192 <span class="preprocessor"> #define DITHER_VALUE(x) dither_scan[(x) & 3]</span> |
| <a name="l00193"></a>00193 <span class="preprocessor"></span><span class="preprocessor">#else</span> |
| <a name="l00194"></a>00194 <span class="preprocessor"></span> <span class="keyword">extern</span> <span class="keyword">const</span> uint16_t <a class="code" href="_sk_dither_8h.html#aea38366e53dfc6f45f6ec245e883b06f">gDitherMatrix_4Bit_16</a>[4]; |
| <a name="l00195"></a>00195 <span class="keyword">extern</span> <span class="keyword">const</span> uint16_t <a class="code" href="_sk_dither_8h.html#a52c23d51604aa48fd0a1c0982069d91e">gDitherMatrix_3Bit_16</a>[4]; |
| <a name="l00196"></a>00196 |
| <a name="l00197"></a><a class="code" href="_sk_dither_8h.html#aeaa1869b82f6e8816731ff47a2ae71e5">00197</a> <span class="preprocessor"> #define DITHER_4444_SCAN(y) const uint16_t dither_scan = gDitherMatrix_4Bit_16[(y) & 3]</span> |
| <a name="l00198"></a><a class="code" href="_sk_dither_8h.html#a862b4c4ee79bf4e66b42c15c6d4a18d1">00198</a> <span class="preprocessor"></span><span class="preprocessor"> #define DITHER_565_SCAN(y) const uint16_t dither_scan = gDitherMatrix_3Bit_16[(y) & 3]</span> |
| <a name="l00199"></a>00199 <span class="preprocessor"></span> |
| <a name="l00200"></a><a class="code" href="_sk_dither_8h.html#a660bf6b8ee86253f57a631284256187d">00200</a> <span class="preprocessor"> #define DITHER_VALUE(x) ((dither_scan >> (((x) & 3) << 2)) & 0xF)</span> |
| <a name="l00201"></a>00201 <span class="preprocessor"></span><span class="preprocessor">#endif</span> |
| <a name="l00202"></a>00202 <span class="preprocessor"></span> |
| <a name="l00203"></a><a class="code" href="_sk_dither_8h.html#a292125160f4c8d1fa2cfd45a12511b44">00203</a> <span class="preprocessor">#define DITHER_INC_X(x) ++(x)</span> |
| <a name="l00204"></a>00204 <span class="preprocessor"></span> |
| <a name="l00205"></a>00205 <span class="preprocessor">#endif</span> |
| </pre></div></div> |
| <hr size="1"/><address style="text-align: right;"><small>Generated on Tue Oct 20 11:03:40 2009 for Skia by |
| <a href="http://www.doxygen.org/index.html"> |
| <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.1 </small></address> |
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