line |
stmt |
bran |
cond |
sub |
pod |
time |
code |
1
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#include "imager.h" |
2
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3
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static int |
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15
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rubthru_targ_noalpha(i_img *im, i_img *src, |
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i_img_dim tx, i_img_dim ty, |
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i_img_dim src_minx, i_img_dim src_miny, |
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i_img_dim src_maxx, i_img_dim src_maxy) { |
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i_img_dim x, y, tty; |
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int alphachan; |
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int ch; |
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15
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i_img_dim width = src_maxx - src_minx; |
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int want_channels; |
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14
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15
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i_clear_error(); |
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16
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15
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100
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if (im->channels == 3 && (src->channels == 4 || src->channels == 2)) { |
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100
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100
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17
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8
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want_channels = 4; |
18
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8
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alphachan = 3; |
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} |
20
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7
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100
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else if (im->channels == 1 && (src->channels == 4 || src->channels == 2)) { |
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100
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100
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21
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3
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want_channels = 2; |
22
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3
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alphachan = 1; |
23
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} |
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else { |
25
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4
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i_copyto(im, src, src_minx, src_miny, src_maxx, src_maxy, tx, ty); |
26
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4
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return 1; |
27
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} |
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29
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100
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#code im->bits <= 8 && src->bits <= 8 |
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100
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30
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IM_WORK_T alpha; |
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IM_COLOR *src_line, *dest_line; |
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33
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11
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src_line = mymalloc(sizeof(IM_COLOR) * width); |
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11
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dest_line = mymalloc(sizeof(IM_COLOR) * width); |
35
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36
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11
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tty = ty; |
37
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691
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100
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for(y = src_miny; y < src_maxy; y++) { |
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100
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38
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680
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IM_COLOR *srcp = src_line; |
39
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680
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IM_COLOR *destp = dest_line; |
40
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680
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IM_GLIN(src, src_minx, src_maxx, y, src_line); |
41
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680
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IM_GLIN(im, tx, tx + width, tty, dest_line); |
42
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680
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if (src->channels != want_channels) |
43
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180
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IM_ADAPT_COLORS(want_channels, src->channels, src_line, width); |
44
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45
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45880
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100
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for(x = src_minx; x < src_maxx; x++) { |
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100
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46
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45200
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alpha = srcp->channel[alphachan]; |
47
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158000
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100
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for (ch = 0; ch < im->channels; ++ch) { |
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100
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48
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225600
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IM_WORK_T samp = (alpha * srcp->channel[ch] |
49
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112800
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+ (IM_SAMPLE_MAX - alpha) * destp->channel[ch])/IM_SAMPLE_MAX; |
50
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112800
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50
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destp->channel[ch] = IM_LIMIT(samp); |
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50
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50
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51
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} |
52
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45200
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++srcp; |
53
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45200
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++destp; |
54
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} |
55
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680
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IM_PLIN(im, tx, tx + width, tty, dest_line); |
56
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680
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tty++; |
57
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} |
58
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11
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myfree(src_line); |
59
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11
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myfree(dest_line); |
60
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#/code |
61
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62
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11
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return 1; |
63
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} |
64
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65
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static int |
66
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9
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rubthru_targ_alpha(i_img *im, i_img *src, i_img_dim tx, i_img_dim ty, |
67
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i_img_dim src_minx, i_img_dim src_miny, |
68
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i_img_dim src_maxx, i_img_dim src_maxy) { |
69
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i_img_dim x, y, ttx, tty; |
70
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int want_channels; |
71
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int alphachan; |
72
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int ch; |
73
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int targ_alpha_chan; |
74
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9
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i_img_dim width = src_maxx - src_minx; |
75
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76
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9
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100
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if (im->channels == 4 && (src->channels == 4 || src->channels == 2)) { |
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100
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100
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77
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3
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alphachan = 3; |
78
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3
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want_channels = 4; |
79
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} |
80
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6
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100
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else if (im->channels == 2 && (src->channels == 4 || src->channels == 2)) { |
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100
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100
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81
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2
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alphachan = 1; |
82
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2
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want_channels = 2; |
83
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} |
84
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else { |
85
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4
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i_copyto(im, src, src_minx, src_miny, src_maxx, src_maxy, tx, ty); |
86
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4
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return 1; |
87
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} |
88
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89
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5
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targ_alpha_chan = im->channels - 1; |
90
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91
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10
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50
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#code im->bits <= 8 && src->bits <= 8 |
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50
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92
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IM_WORK_T src_alpha, orig_alpha, dest_alpha, remains; |
93
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IM_COLOR *src_line, *dest_line; |
94
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95
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5
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src_line = mymalloc(sizeof(IM_COLOR) * width); |
96
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5
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dest_line = mymalloc(sizeof(IM_COLOR) * width); |
97
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98
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5
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tty = ty; |
99
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206
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100
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for(y = src_miny; y < src_maxy; y++) { |
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0
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100
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i_img_dim min_x, max_x; |
101
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201
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IM_COLOR *srcp = src_line; |
102
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201
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IM_COLOR *destp = dest_line; |
103
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201
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IM_GLIN(src, src_minx, src_maxx, y, src_line); |
104
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201
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if (src->channels != want_channels) |
105
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100
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IM_ADAPT_COLORS(want_channels, src->channels, src_line, width); |
106
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201
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min_x = src_minx; |
107
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201
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max_x = src_maxx; |
108
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109
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204
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50
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while (min_x < max_x && srcp->channel[alphachan] == 0) { |
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100
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0
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0
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110
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3
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++min_x; |
111
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3
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++srcp; |
112
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} |
113
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202
|
50
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while (max_x > min_x && src_line[max_x-1 - src_minx].channel[alphachan] == 0) { |
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100
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0
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0
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114
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1
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--max_x; |
115
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} |
116
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117
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201
|
50
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if (max_x > min_x) { |
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0
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118
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201
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i_img_dim work_left = tx + min_x - src_minx; |
119
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201
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i_img_dim work_width = max_x - min_x; |
120
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201
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ttx = work_left; |
121
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201
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IM_GLIN(im, work_left, work_left + work_width, tty, dest_line); |
122
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123
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10207
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100
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for(x = min_x; x < max_x; x++) { |
|
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0
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124
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10006
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src_alpha = srcp->channel[alphachan]; |
125
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10006
|
50
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if (src_alpha) { |
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0
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126
|
10006
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remains = IM_SAMPLE_MAX - src_alpha; |
127
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10006
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orig_alpha = destp->channel[targ_alpha_chan]; |
128
|
10006
|
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dest_alpha = src_alpha + (remains * orig_alpha) / IM_SAMPLE_MAX; |
129
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130
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30024
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100
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for (ch = 0; ch < im->channels-1; ++ch) { |
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0
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131
|
20018
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IM_WORK_T samp = |
132
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20018
|
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( src_alpha * srcp->channel[ch] |
133
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20018
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+ remains * destp->channel[ch] * orig_alpha / IM_SAMPLE_MAX |
134
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) / dest_alpha; |
135
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20018
|
50
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destp->channel[ch] = IM_LIMIT(samp); |
|
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0
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0
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136
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} |
137
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/* dest's alpha */ |
138
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10006
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destp->channel[targ_alpha_chan] = dest_alpha; |
139
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} |
140
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10006
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++srcp; |
141
|
10006
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++destp; |
142
|
10006
|
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ttx++; |
143
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} |
144
|
201
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IM_PLIN(im, work_left, work_left + work_width, tty, dest_line); |
145
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|
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} |
146
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201
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tty++; |
147
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} |
148
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5
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myfree(dest_line); |
149
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5
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myfree(src_line); |
150
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|
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#/code |
151
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5
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return 1; |
152
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} |
153
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154
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/* |
155
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=item i_rubthru(C, C, C, C, C, C, C, C) |
156
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157
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=category Image |
158
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159
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Takes the sub image C[C, C)[C, C)> and |
160
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|
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overlays it at (C,C) on the image object. |
161
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|
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162
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The alpha channel of each pixel in C is used to control how much |
163
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|
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the existing color in C is replaced, if it is 255 then the color |
164
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|
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is completely replaced, if it is 0 then the original color is left |
165
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|
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unmodified. |
166
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|
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167
|
|
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=cut |
168
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|
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*/ |
169
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|
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|
|
|
170
|
|
|
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int |
171
|
24
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|
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|
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i_rubthru(i_img *im, i_img *src, i_img_dim tx, i_img_dim ty, i_img_dim src_minx, i_img_dim src_miny, |
172
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|
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i_img_dim src_maxx, i_img_dim src_maxy) { |
173
|
24
|
50
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|
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if (src_minx < 0) { |
174
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0
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|
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tx -= src_minx; |
175
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0
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|
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src_minx = 0; |
176
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|
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|
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} |
177
|
24
|
50
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|
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if (src_miny < 0) { |
178
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0
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|
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ty -= src_miny; |
179
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0
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|
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src_miny = 0; |
180
|
|
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|
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} |
181
|
24
|
50
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|
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if (tx < 0) { |
182
|
0
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|
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src_minx -= tx; |
183
|
0
|
|
|
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tx = 0; |
184
|
|
|
|
|
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} |
185
|
24
|
50
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|
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|
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if (ty < 0) { |
186
|
0
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|
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src_miny -= ty; |
187
|
0
|
|
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ty = 0; |
188
|
|
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} |
189
|
24
|
50
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|
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|
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if (src_maxx > src->xsize) { |
190
|
0
|
|
|
|
|
|
src_maxx = src->xsize; |
191
|
|
|
|
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|
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} |
192
|
24
|
50
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|
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|
|
if (src_maxy > src->ysize) { |
193
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0
|
|
|
|
|
|
src_maxy = src->ysize; |
194
|
|
|
|
|
|
|
} |
195
|
24
|
50
|
|
|
|
|
if (tx >= im->xsize || ty >= im->ysize |
|
|
50
|
|
|
|
|
|
196
|
24
|
50
|
|
|
|
|
|| src_minx >= src_maxx || src_miny >= src_maxy) { |
|
|
50
|
|
|
|
|
|
197
|
0
|
|
|
|
|
|
i_clear_error(); |
198
|
|
|
|
|
|
|
/* just do nothing, attempting to rubthrough outside the target isn't |
199
|
|
|
|
|
|
|
worth being an error */ |
200
|
0
|
|
|
|
|
|
return 1; |
201
|
|
|
|
|
|
|
} |
202
|
|
|
|
|
|
|
|
203
|
24
|
100
|
|
|
|
|
if (im->channels == 1 || im->channels == 3) |
|
|
100
|
|
|
|
|
|
204
|
15
|
|
|
|
|
|
return rubthru_targ_noalpha(im, src, tx, ty, src_minx, src_miny, |
205
|
|
|
|
|
|
|
src_maxx, src_maxy); |
206
|
|
|
|
|
|
|
else |
207
|
9
|
|
|
|
|
|
return rubthru_targ_alpha(im, src, tx, ty, src_minx, src_miny, |
208
|
|
|
|
|
|
|
src_maxx, src_maxy); |
209
|
|
|
|
|
|
|
} |