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comparison src/filters/simple2x.cpp @ 1:f9f4f1b99eed

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importing src directory
author Robert McIntyre <rlm@mit.edu>
date Sat, 03 Mar 2012 10:31:27 -0600
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0:8ced16adf2e1 1:f9f4f1b99eed
1 #include "../Port.h"
2
3 void Simple2x16(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
4 u8 *dstPtr, u32 dstPitch, int width, int height)
5 {
6 u8 *nextLine, *finish;
7
8 nextLine = dstPtr + dstPitch;
9
10 do
11 {
12 u32 *bP = (u32 *) srcPtr;
13 u32 *dP = (u32 *) dstPtr;
14 u32 *nL = (u32 *) nextLine;
15 u32 currentPixel;
16
17 finish = (u8 *) bP + ((width + 2) << 1);
18 currentPixel = *bP++;
19
20 do
21 {
22 #ifdef WORDS_BIGENDIAN
23 u32 color = currentPixel >> 16;
24 #else
25 u32 color = currentPixel & 0xffff;
26 #endif
27
28 color = color | (color << 16);
29
30 *(dP) = color;
31 *(nL) = color;
32
33 #ifdef WORDS_BIGENDIAN
34 color = currentPixel & 0xffff;
35 #else
36 color = currentPixel >> 16;
37 #endif
38 color = color | (color << 16);
39 *(dP + 1) = color;
40 *(nL + 1) = color;
41
42 currentPixel = *bP++;
43
44 dP += 2;
45 nL += 2;
46 }
47 while ((u8 *) bP < finish);
48
49 srcPtr += srcPitch;
50 dstPtr += dstPitch << 1;
51 nextLine += dstPitch << 1;
52 }
53 while (--height);
54 }
55
56 void Simple2x32(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
57 u8 *dstPtr, u32 dstPitch, int width, int height)
58 {
59 u8 *nextLine, *finish;
60
61 nextLine = dstPtr + dstPitch;
62
63 do
64 {
65 u32 *bP = (u32 *) srcPtr;
66 u32 *dP = (u32 *) dstPtr;
67 u32 *nL = (u32 *) nextLine;
68 u32 currentPixel;
69
70 finish = (u8 *) bP + ((width + 1) << 2);
71 currentPixel = *bP++;
72
73 do
74 {
75 u32 color = currentPixel;
76
77 *(dP) = color;
78 *(dP + 1) = color;
79 *(nL) = color;
80 *(nL + 1) = color;
81
82 currentPixel = *bP++;
83
84 dP += 2;
85 nL += 2;
86 }
87 while ((u8 *) bP < finish);
88
89 srcPtr += srcPitch;
90 dstPtr += dstPitch << 1;
91 nextLine += dstPitch << 1;
92 }
93 while (--height);
94 }
95
96 #if 0
97 // generic Simple Nx magnification filter
98 template <int magnification, typename ColorType>
99 void SimpleNx(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
100 u8 *dstPtr, u32 dstPitch, int width, int height)
101 {
102 srcPitch = srcPitch / sizeof(ColorType) - width;
103 u32 dstNextP = dstPitch / sizeof(ColorType);
104 u32 dstNextL = (dstNextP - width) * magnification; // skip to the next magnificated 'line'
105 dstNextP -= magnification;
106
107 u32 offset = (dstPitch + sizeof(ColorType)) * magnification - dstPitch;
108
109 ColorType *src = (ColorType *)srcPtr;
110 ColorType *dst = (ColorType *)dstPtr;
111
112 do // per src line
113 {
114 u8 *finishP = (u8 *)dst + offset;
115 for (int x = 0; x < width; ++x) // per pixel in line
116 {
117 ColorType col = *src;
118 ColorType *dst2 = dst;
119 u8 * finishM = (u8 *)(dst + magnification);
120 do // dst magnificated pixel
121 {
122 do
123 {
124 *dst2 = col;
125 }
126 while ((u8 *)++dst2 < finishM);
127 dst2 += dstNextP;
128 finishM += dstPitch;
129 }
130 while ((u8 *)dst2 < finishP);
131
132 ++src;
133 dst += magnification;
134 finishP += magnification * sizeof(ColorType);
135 }
136 src += srcPitch;
137 dst += dstNextL;
138 }
139 while (--height);
140 }
141
142 #else
143
144 // generic Simple Nx magnification filter
145 template <int magnification, typename ColorType>
146 void SimpleNx(u8 *srcPtr, u32 srcPitch, u8 * /* deltaPtr */,
147 u8 *dstPtr, u32 dstPitch, int width, int height)
148 {
149 srcPitch = srcPitch / sizeof(ColorType) - width;
150 dstPitch /= sizeof(ColorType);
151 u32 dstBlank = (dstPitch - width) * magnification; // skip to the next magnificated 'line'
152 dstPitch -= magnification;
153
154 ColorType *src = (ColorType *)srcPtr;
155 ColorType *dst = (ColorType *)dstPtr;
156
157 do // per src line
158 {
159 for (int x = 0; x < width; ++x) // per pixel in src line
160 {
161 ColorType col = *src;
162 ColorType *dst2 = dst;
163 for (int dy = 0; dy < magnification; ++dy) // dst magnificated pixel
164 {
165 for (int dx = 0; dx < magnification; ++dx)
166 {
167 *dst2 = col;
168 ++dst2;
169 }
170 dst2 += dstPitch;
171 }
172
173 ++src;
174 dst += magnification;
175 }
176 src += srcPitch;
177 dst += dstBlank;
178 }
179 while (--height);
180 }
181
182 #endif
183
184 typedef void (*SimpleNxFP)(u8 *, u32, u8 *, u8 *, u32, int, int);
185
186 SimpleNxFP Simple3x16 = SimpleNx<3, u16>;
187 SimpleNxFP Simple3x32 = SimpleNx<3, u32>;
188 SimpleNxFP Simple4x16 = SimpleNx<4, u16>;
189 SimpleNxFP Simple4x32 = SimpleNx<4, u32>;