4 imgdouble.c - implements double per sample images
8 i_img *im = i_img_double_new(width, height, 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, i_img_dim x, i_img_dim y, const i_color *val);
27 static int i_gpix_ddoub(i_img *im, i_img_dim x, i_img_dim y, i_color *val);
28 static i_img_dim i_glin_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, i_color *vals);
29 static i_img_dim i_plin_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, const i_color *vals);
30 static int i_ppixf_ddoub(i_img *im, i_img_dim x, i_img_dim y, const i_fcolor *val);
31 static int i_gpixf_ddoub(i_img *im, i_img_dim x, i_img_dim y, i_fcolor *val);
32 static i_img_dim i_glinf_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, i_fcolor *vals);
33 static i_img_dim i_plinf_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, const i_fcolor *vals);
34 static i_img_dim i_gsamp_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, i_sample_t *samps,
35 int const *chans, int chan_count);
36 static i_img_dim i_gsampf_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim 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_addcolors */
74 NULL, /* i_f_getcolors */
75 NULL, /* i_f_colorcount */
76 NULL, /* i_f_maxcolors */
77 NULL, /* i_f_findcolor */
78 NULL, /* i_f_setcolors */
80 NULL, /* i_f_destroy */
83 NULL, /* i_f_psamp_bits */
87 =item i_img_double_new(i_img_dim x, i_img_dim y, int ch)
88 =category Image creation/destruction
89 =synopsis i_img *img = i_img_double_new(width, height, channels);
91 Creates a new double per sample image.
95 i_img *i_img_double_new(i_img_dim x, i_img_dim y, int ch) {
99 mm_log((1,"i_img_double_new(x %" i_DF ", y %" i_DF ", ch %d)\n",
100 i_DFc(x), i_DFc(y), ch));
102 if (x < 1 || y < 1) {
103 i_push_error(0, "Image sizes must be positive");
106 if (ch < 1 || ch > MAXCHANNELS) {
107 i_push_errorf(0, "channels must be between 1 and %d", MAXCHANNELS);
110 bytes = x * y * ch * sizeof(double);
111 if (bytes / y / ch / sizeof(double) != x) {
112 i_push_errorf(0, "integer overflow calculating image allocation");
117 *im = IIM_base_double_direct;
118 i_tags_new(&im->tags);
124 im->idata = mymalloc(im->bytes);
125 memset(im->idata, 0, im->bytes);
131 static int i_ppix_ddoub(i_img *im, i_img_dim x, i_img_dim y, const i_color *val) {
135 if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize)
138 off = (x + y * im->xsize) * im->channels;
139 if (I_ALL_CHANNELS_WRITABLE(im)) {
140 for (ch = 0; ch < im->channels; ++ch)
141 ((double*)im->idata)[off+ch] = Sample8ToF(val->channel[ch]);
144 for (ch = 0; ch < im->channels; ++ch)
145 if (im->ch_mask & (1<<ch))
146 ((double*)im->idata)[off+ch] = Sample8ToF(val->channel[ch]);
152 static int i_gpix_ddoub(i_img *im, i_img_dim x, i_img_dim y, i_color *val) {
156 if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize)
159 off = (x + y * im->xsize) * im->channels;
160 for (ch = 0; ch < im->channels; ++ch)
161 val->channel[ch] = SampleFTo8(((double *)im->idata)[off+ch]);
166 static int i_ppixf_ddoub(i_img *im, i_img_dim x, i_img_dim y, const i_fcolor *val) {
170 if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize)
173 off = (x + y * im->xsize) * im->channels;
174 if (I_ALL_CHANNELS_WRITABLE(im)) {
175 for (ch = 0; ch < im->channels; ++ch)
176 ((double *)im->idata)[off+ch] = val->channel[ch];
179 for (ch = 0; ch < im->channels; ++ch)
180 if (im->ch_mask & (1 << ch))
181 ((double *)im->idata)[off+ch] = val->channel[ch];
187 static int i_gpixf_ddoub(i_img *im, i_img_dim x, i_img_dim y, i_fcolor *val) {
191 if (x < 0 || x >= im->xsize || y < 0 || y >= im->ysize)
194 off = (x + y * im->xsize) * im->channels;
195 for (ch = 0; ch < im->channels; ++ch)
196 val->channel[ch] = ((double *)im->idata)[off+ch];
201 static i_img_dim i_glin_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, i_color *vals) {
205 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
208 off = (l+y*im->xsize) * im->channels;
210 for (i = 0; i < count; ++i) {
211 for (ch = 0; ch < im->channels; ++ch) {
212 vals[i].channel[ch] = SampleFTo8(((double *)im->idata)[off]);
223 static i_img_dim i_plin_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, const i_color *vals) {
227 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
230 off = (l+y*im->xsize) * im->channels;
232 if (I_ALL_CHANNELS_WRITABLE(im)) {
233 for (i = 0; i < count; ++i) {
234 for (ch = 0; ch < im->channels; ++ch) {
235 ((double *)im->idata)[off] = Sample8ToF(vals[i].channel[ch]);
241 for (i = 0; i < count; ++i) {
242 for (ch = 0; ch < im->channels; ++ch) {
243 if (im->ch_mask & (1 << ch))
244 ((double *)im->idata)[off] = Sample8ToF(vals[i].channel[ch]);
256 static i_img_dim i_glinf_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, i_fcolor *vals) {
260 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
263 off = (l+y*im->xsize) * im->channels;
265 for (i = 0; i < count; ++i) {
266 for (ch = 0; ch < im->channels; ++ch) {
267 vals[i].channel[ch] = ((double *)im->idata)[off];
278 static i_img_dim i_plinf_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, const i_fcolor *vals) {
282 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
285 off = (l+y*im->xsize) * im->channels;
287 if (I_ALL_CHANNELS_WRITABLE(im)) {
288 for (i = 0; i < count; ++i) {
289 for (ch = 0; ch < im->channels; ++ch) {
290 ((double *)im->idata)[off] = vals[i].channel[ch];
296 for (i = 0; i < count; ++i) {
297 for (ch = 0; ch < im->channels; ++ch) {
298 if (im->ch_mask & (1 << ch))
299 ((double *)im->idata)[off] = vals[i].channel[ch];
311 static i_img_dim i_gsamp_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, i_sample_t *samps,
312 int const *chans, int chan_count) {
314 i_img_dim count, i, w;
317 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
320 off = (l+y*im->xsize) * im->channels;
325 /* make sure we have good channel numbers */
326 for (ch = 0; ch < chan_count; ++ch) {
327 if (chans[ch] < 0 || chans[ch] >= im->channels) {
328 i_push_errorf(0, "No channel %d in this image", chans[ch]);
332 for (i = 0; i < w; ++i) {
333 for (ch = 0; ch < chan_count; ++ch) {
334 *samps++ = SampleFTo8(((double *)im->idata)[off+chans[ch]]);
341 if (chan_count <= 0 || chan_count > im->channels) {
342 i_push_errorf(0, "chan_count %d out of range, must be >0, <= channels",
346 for (i = 0; i < w; ++i) {
347 for (ch = 0; ch < chan_count; ++ch) {
348 *samps++ = SampleFTo8(((double *)im->idata)[off+ch]);
362 static i_img_dim i_gsampf_ddoub(i_img *im, i_img_dim l, i_img_dim r, i_img_dim y, i_fsample_t *samps,
363 int const *chans, int chan_count) {
365 i_img_dim count, i, w;
368 if (y >=0 && y < im->ysize && l < im->xsize && l >= 0) {
371 off = (l+y*im->xsize) * im->channels;
376 /* make sure we have good channel numbers */
377 for (ch = 0; ch < chan_count; ++ch) {
378 if (chans[ch] < 0 || chans[ch] >= im->channels) {
379 i_push_errorf(0, "No channel %d in this image", chans[ch]);
383 for (i = 0; i < w; ++i) {
384 for (ch = 0; ch < chan_count; ++ch) {
385 *samps++ = ((double *)im->idata)[off+chans[ch]];
392 if (chan_count <= 0 || chan_count > im->channels) {
393 i_push_errorf(0, "chan_count %d out of range, must be >0, <= channels",
397 for (i = 0; i < w; ++i) {
398 for (ch = 0; ch < chan_count; ++ch) {
399 *samps++ = ((double *)im->idata)[off+ch];
414 =item i_img_to_drgb(im)
416 =category Image creation
418 Returns a double/sample version of the supplied image.
420 Returns the image on success, or NULL on failure.
426 i_img_to_drgb(i_img *im) {
431 targ = i_img_double_new(im->xsize, im->ysize, im->channels);
434 line = mymalloc(sizeof(i_fcolor) * im->xsize);
435 for (y = 0; y < im->ysize; ++y) {
436 i_glinf(im, 0, im->xsize, y, line);
437 i_plinf(targ, 0, im->xsize, y, line);
450 Tony Cook <tony@develop-help.com>