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comparison src/filters/motionblur.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 extern u32 RGB_LOW_BITS_MASK;
4
5 void MotionBlur(u8 *srcPtr, u32 srcPitch, u8 *deltaPtr,
6 u8 *dstPtr, u32 dstPitch, int width, int height)
7 {
8 u8 *nextLine, *finish;
9 u32 colorMask = ~(RGB_LOW_BITS_MASK | (RGB_LOW_BITS_MASK << 16));
10 u32 lowPixelMask = RGB_LOW_BITS_MASK;
11
12 nextLine = dstPtr + dstPitch;
13
14 do
15 {
16 u32 *bP = (u32 *) srcPtr;
17 u32 *xP = (u32 *) deltaPtr;
18 u32 *dP = (u32 *) dstPtr;
19 u32 *nL = (u32 *) nextLine;
20 u32 currentPixel;
21 u32 nextPixel;
22 u32 currentDelta;
23 u32 nextDelta;
24
25 finish = (u8 *) bP + ((width + 2) << 1);
26 nextPixel = *bP++;
27 nextDelta = *xP++;
28
29 do
30 {
31 currentPixel = nextPixel;
32 currentDelta = nextDelta;
33 nextPixel = *bP++;
34 nextDelta = *xP++;
35
36 if (currentPixel != currentDelta)
37 {
38 u32 colorA, product, colorB;
39
40 *(xP - 2) = currentPixel;
41 #ifdef WORDS_BIGENDIAN
42 colorA = currentPixel >> 16;
43 colorB = currentDelta >> 16;
44 #else
45 colorA = currentPixel & 0xffff;
46 colorB = currentDelta & 0xffff;
47 #endif
48
49 product = ((((colorA & colorMask) >> 1) +
50 ((colorB & colorMask) >> 1) +
51 (colorA & colorB & lowPixelMask)));
52
53 *(dP) = product | product << 16;
54 *(nL) = product | product << 16;
55
56 #ifdef WORDS_BIGENDIAN
57 colorA = (currentPixel & 0xffff);
58 colorB = (currentDelta & 0xffff);
59 #else
60 colorA = currentPixel >> 16;
61 colorB = currentDelta >> 16;
62 #endif
63 product = ((((colorA & colorMask) >> 1) +
64 ((colorB & colorMask) >> 1) +
65 (colorA & colorB & lowPixelMask)));
66
67 *(dP + 1) = product | product << 16;
68 *(nL + 1) = product | product << 16;
69 }
70 else
71 {
72 u32 colorA, product;
73
74 *(xP - 2) = currentPixel;
75 #ifdef WORDS_BIGENDIAN
76 colorA = currentPixel >> 16;
77 #else
78 colorA = currentPixel & 0xffff;
79 #endif
80
81 product = colorA;
82
83 *(dP) = product | product << 16;
84 *(nL) = product | product << 16;
85 #ifdef WORDS_BIGENDIAN
86 colorA = (currentPixel & 0xffff);
87 #else
88 colorA = currentPixel >> 16;
89 #endif
90 product = colorA;
91
92 *(dP + 1) = product | product << 16;
93 *(nL + 1) = product | product << 16;
94 }
95
96 dP += 2;
97 nL += 2;
98 }
99 while ((u8 *) bP < finish);
100
101 deltaPtr += srcPitch;
102 srcPtr += srcPitch;
103 dstPtr += dstPitch << 1;
104 nextLine += dstPitch << 1;
105 }
106 while (--height);
107 }
108
109 void MotionBlur32(u8 *srcPtr, u32 srcPitch, u8 *deltaPtr,
110 u8 *dstPtr, u32 dstPitch, int width, int height)
111 {
112 u8 *nextLine, *finish;
113 u32 colorMask = ~RGB_LOW_BITS_MASK;
114 u32 lowPixelMask = RGB_LOW_BITS_MASK;
115
116 nextLine = dstPtr + dstPitch;
117
118 do
119 {
120 u32 *bP = (u32 *) srcPtr;
121 u32 *xP = (u32 *) deltaPtr;
122 u32 *dP = (u32 *) dstPtr;
123 u32 *nL = (u32 *) nextLine;
124 u32 currentPixel;
125 u32 nextPixel;
126 u32 currentDelta;
127 u32 nextDelta;
128
129 finish = (u8 *) bP + ((width + 1) << 2);
130 nextPixel = *bP++;
131 nextDelta = *xP++;
132
133 do
134 {
135 currentPixel = nextPixel;
136 currentDelta = nextDelta;
137 nextPixel = *bP++;
138 nextDelta = *xP++;
139
140 u32 colorA, product, colorB;
141
142 *(xP - 2) = currentPixel;
143 colorA = currentPixel;
144 colorB = currentDelta;
145
146 product = ((((colorA & colorMask) >> 1) +
147 ((colorB & colorMask) >> 1) +
148 (colorA & colorB & lowPixelMask)));
149
150 *(dP) = product;
151 *(dP + 1) = product;
152 *(nL) = product;
153 *(nL + 1) = product;
154
155 *(xP - 1) = nextPixel;
156
157 colorA = nextPixel;
158 colorB = nextDelta;
159
160 product = ((((colorA & colorMask) >> 1) +
161 ((colorB & colorMask) >> 1) +
162 (colorA & colorB & lowPixelMask)));
163
164 *(dP + 2) = product;
165 *(dP + 3) = product;
166 *(nL + 2) = product;
167 *(nL + 3) = product;
168
169 nextPixel = *bP++;
170 nextDelta = *xP++;
171
172 dP += 4;
173 nL += 4;
174 }
175 while ((u8 *) bP < finish);
176
177 deltaPtr += srcPitch;
178 srcPtr += srcPitch;
179 dstPtr += dstPitch << 1;
180 nextLine += dstPitch << 1;
181 }
182 while (--height);
183 }