4 imgdouble.c - implements double per sample images
8 i_img *im = i_img_double_new(int x, int y, int channels);
9 # use like a normal image
13 Implements double/sample images.
15 This basic implementation is required so that we have some larger
16 sample image type to work with.
26 static int i_ppix_ddoub(i_img *im, int x, int y, i_color *val);
27 static int i_gpix_ddoub(i_img *im, int x, int y, i_color *val);
28 static int i_glin_ddoub(i_img *im, int l, int r, int y, i_color *vals);
29 static int i_plin_ddoub(i_img *im, int l, int r, int y, i_color *vals);
30 static int i_ppixf_ddoub(i_img *im, int x, int y, i_fcolor *val);
31 static int i_gpixf_ddoub(i_img *im, int x, int y, i_fcolor *val);
32 static int i_glinf_ddoub(i_img *im, int l, int r, int y, i_fcolor *vals);
33 static int i_plinf_ddoub(i_img *im, int l, int r, int y, i_fcolor *vals);
34 static int i_gsamp_ddoub(i_img *im, int l, int r, int y, i_sample_t *samps,
35 int const *chans, int chan_count);
36 static int i_gsampf_ddoub(i_img *im, int l, int r, int y, i_fsample_t *samps,
37 int const *chans, int chan_count);
40 =item IIM_base_16bit_direct
42 Base structure used to initialize a 16-bit/sample image.
48 static i_img IIM_base_double_direct =
51 0, 0, 0, /* xsize, ysize, bytes */
53 i_double_bits, /* bits */
54 i_direct_type, /* type */
57 { 0, 0, NULL }, /* tags */
60 i_ppix_ddoub, /* i_f_ppix */
61 i_ppixf_ddoub, /* i_f_ppixf */
62 i_plin_ddoub, /* i_f_plin */
63 i_plinf_ddoub, /* i_f_plinf */
64 i_gpix_ddoub, /* i_f_gpix */
65 i_gpixf_ddoub, /* i_f_gpixf */
66 i_glin_ddoub, /* i_f_glin */
67 i_glinf_ddoub, /* i_f_glinf */
68 i_gsamp_ddoub, /* i_f_gsamp */
69 i_gsampf_ddoub, /* i_f_gsampf */
73 NULL, /* i_f_addcolor */
74 NULL, /* i_f_getcolor */
75 NULL, /* i_f_colorcount */
76 NULL, /* i_f_findcolor */
78 NULL, /* i_f_destroy */
82 =item i_img_double_new(int x, int y, int ch)
84 Creates a new double per sample image.
88 i_img *i_img_double_new_low(i_img *im, int x, int y, int ch) {
91 mm_log((1,"i_img_double_new(x %d, y %d, ch %d)\n", x, y, ch));
94 i_push_error(0, "Image sizes must be positive");
97 if (ch < 1 || ch > MAXCHANNELS) {
98 i_push_errorf(0, "channels must be between 1 and %d", MAXCHANNELS);
101 bytes = x * y * ch * sizeof(double);
102 if (bytes / y / ch / sizeof(double) != x) {
103 i_push_errorf(0, "integer overflow calculating image allocation");
107 *im = IIM_base_double_direct;
108 i_tags_new(&im->tags);
114 im->idata = mymalloc(im->bytes);
116 memset(im->idata, 0, im->bytes);
119 i_tags_destroy(&im->tags);
126 i_img *i_img_double_new(int x, int y, int ch) {
131 im = mymalloc(sizeof(i_img));
133 if (!i_img_double_new_low(im, x, y, ch)) {
139 mm_log((1, "(%p) <- i_img_double_new\n", im));
144 static int i_ppix_ddoub(i_img *im, int x, int y, i_color *val) {
147 if (x < 0 || x >= im->xsize || y < 0 || y > im->ysize)
150 off = (x + y * im->xsize) * im->channels;
151 for (ch = 0; ch < im->channels; ++ch)
152 ((double*)im->idata)[off+ch] = Sample8ToF(val->channel[ch]);
157 static int i_gpix_ddoub(i_img *im, int x, int y, i_color *val) {
160 if (x < 0 || x >= im->xsize || y < 0 || y > im->ysize)
163 off = (x + y * im->xsize) * im->channels;
164 for (ch = 0; ch < im->channels; ++ch)
165 val->channel[ch] = SampleFTo8(((double *)im->idata)[off+ch]);
170 static int i_ppixf_ddoub(i_img *im, int x, int y, i_fcolor *val) {
173 if (x < 0 || x >= im->xsize || y < 0 || y > im->ysize)
176 off = (x + y * im->xsize) * im->channels;
177 for (ch = 0; ch < im->channels; ++ch)
178 ((double *)im->idata)[off+ch] = val->channel[ch];;
183 static int i_gpixf_ddoub(i_img *im, int x, int y, i_fcolor *val) {
186 if (x < 0 || x >= im->xsize || y < 0 || y > im->ysize)
189 off = (x + y * im->xsize) * im->channels;
190 for (ch = 0; ch < im->channels; ++ch)
191 val->channel[ch] = ((double *)im->idata)[off+ch];
196 static int i_glin_ddoub(i_img *im, int l, int r, int y, i_color *vals) {
199 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
202 off = (l+y*im->xsize) * im->channels;
204 for (i = 0; i < count; ++i) {
205 for (ch = 0; ch < im->channels; ++ch) {
206 vals[i].channel[ch] = SampleFTo8(((double *)im->idata)[off]);
217 static int i_plin_ddoub(i_img *im, int l, int r, int y, i_color *vals) {
220 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
223 off = (l+y*im->xsize) * im->channels;
225 for (i = 0; i < count; ++i) {
226 for (ch = 0; ch < im->channels; ++ch) {
227 ((double *)im->idata)[off] = Sample8ToF(vals[i].channel[ch]);
238 static int i_glinf_ddoub(i_img *im, int l, int r, int y, i_fcolor *vals) {
241 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
244 off = (l+y*im->xsize) * im->channels;
246 for (i = 0; i < count; ++i) {
247 for (ch = 0; ch < im->channels; ++ch) {
248 vals[i].channel[ch] = ((double *)im->idata)[off];
259 static int i_plinf_ddoub(i_img *im, int l, int r, int y, i_fcolor *vals) {
262 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
265 off = (l+y*im->xsize) * im->channels;
267 for (i = 0; i < count; ++i) {
268 for (ch = 0; ch < im->channels; ++ch) {
269 ((double *)im->idata)[off] = vals[i].channel[ch];
280 static int i_gsamp_ddoub(i_img *im, int l, int r, int y, i_sample_t *samps,
281 int const *chans, int chan_count) {
285 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
288 off = (l+y*im->xsize) * im->channels;
293 /* make sure we have good channel numbers */
294 for (ch = 0; ch < chan_count; ++ch) {
295 if (chans[ch] < 0 || chans[ch] >= im->channels) {
296 i_push_errorf(0, "No channel %d in this image", chans[ch]);
300 for (i = 0; i < w; ++i) {
301 for (ch = 0; ch < chan_count; ++ch) {
302 *samps++ = SampleFTo8(((double *)im->idata)[off+chans[ch]]);
309 for (i = 0; i < w; ++i) {
310 for (ch = 0; ch < chan_count; ++ch) {
311 *samps++ = SampleFTo8(((double *)im->idata)[off+ch]);
325 static int i_gsampf_ddoub(i_img *im, int l, int r, int y, i_fsample_t *samps,
326 int const *chans, int chan_count) {
330 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
333 off = (l+y*im->xsize) * im->channels;
338 /* make sure we have good channel numbers */
339 for (ch = 0; ch < chan_count; ++ch) {
340 if (chans[ch] < 0 || chans[ch] >= im->channels) {
341 i_push_errorf(0, "No channel %d in this image", chans[ch]);
345 for (i = 0; i < w; ++i) {
346 for (ch = 0; ch < chan_count; ++ch) {
347 *samps++ = ((double *)im->idata)[off+chans[ch]];
354 for (i = 0; i < w; ++i) {
355 for (ch = 0; ch < chan_count; ++ch) {
356 *samps++ = ((double *)im->idata)[off+ch];
376 Tony Cook <tony@develop-help.com>