refactoring zoom code
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tTh
parent
f70037a143
commit
2c4612411b
134
Lib/zoom.c
134
Lib/zoom.c
@ -26,35 +26,37 @@ long hit, mess;
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#endif
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#if DEBUG_LEVEL
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fprintf(stderr, "%s : %p -> %p %f %f 0x%x\n", __func__,
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fprintf(stderr, ">>> %s ( %p %p %f %f 0x%x )\n", __func__,
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src, dst, kx, ky, flags);
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#endif
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/* initilaisation de variables de debug/comptage */
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if (flags) {
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fprintf(stderr, "in %s, flags muste be 0x0000\n", __func__);
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return WRONG_FLAG;
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}
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/* initialisation de variables de debug/comptage */
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#if DEBUG_LEVEL
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hit = mess = 0L;
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#endif
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for (xd=0; xd<dst->width; xd++)
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{
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for (xd=0; xd<dst->width; xd++) {
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dxs = (double)xd * kx;
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for (yd=0; yd<dst->height; yd++)
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{
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for (yd=0; yd<dst->height; yd++) {
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rd = gd = bd = 42;
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dys = (double)yd * ky; /* kikoo lol */
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xs = (int)dxs;
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ys = (int)dys;
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if ( Image_xy_inside(src, xs, ys) )
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{
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if ( Image_xy_inside(src, xs, ys) ) {
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Image_getRGB(src, xs, ys, &rd, &gd, &bd);
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#if DEBUG_LEVEL
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hit++;
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#endif
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}
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#if DEBUG_LEVEL
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else mess++;
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else { mess++; }
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#endif
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Image_plotRGB(dst, xd, yd, rd, gd, bd);
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}
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@ -67,25 +69,117 @@ fprintf(stderr, "%s -> hit=%ld mess=%ld\n", __func__, hit, mess);
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return BAD_ZOOM;
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}
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/*::------------------------------------------------------------------::*/
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int Image_zoom_000(Image_Desc *src, Image_Desc *dst, Image_Rect *rect)
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/*
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* Very old non-working code get an update on Thu 24 Sep 2022
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*
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* We have two versions:
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* zoom_000 without interpolation
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* zoom_001 with a pseudo bi-linear interpolation
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* Public intercace:
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* Image_zoom_extract(src, dst, rect, flags)
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*/
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/* this is a semi-private function */
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int Image_zoom_000(Image_Desc *src, Image_Desc *dst, Image_Rect *rect,
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float kx, float ky)
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{
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int xd, yd, r, g, b;
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double fxd, fyd;
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int xd, yd, xs, ys, r, g, b;
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float ftmp;
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#if DEBUG_LEVEL
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fprintf(stderr, "%s ( %p %p %p )\n", __func__, src, dst, rect);
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fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, src, dst, rect);
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#endif
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for (yd=0; yd<dst->height; yd++)
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{
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fyd = (double)yd;
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for (xd=0; xd<dst->height; xd++)
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{
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fxd = (double)xd;
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for (yd=0; yd<dst->height; yd++) {
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ftmp = ((float)yd) / ky;
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ys = (int) (ftmp);
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ys += rect->y;
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/*
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fprintf(stderr, " yd %5d -> %8.3f ys %5d\n", yd, ftmp, ys);
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*/
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for (xd=0; xd<dst->width; xd++) {
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xs = (int) ((float)xd / kx);
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xs += rect->x;
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if ( Image_xy_inside(src, xs, ys) )
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{ Image_getRGB(src, xs, ys, &r, &g, &b); }
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else
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{ r = g = b = 127; }
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Image_plotRGB(dst, xd, yd, r, g, b);
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}
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}
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return FULL_NUCKED;
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return FUNC_IS_BETA;
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}
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/*::------------------------------------------------------------------::*/
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/* */
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/* nouveau Fri 23 Sep 2022 02:27:00 PM CEST */
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/* this is a semi-private function */
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/* */
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int Image_zoom_001(Image_Desc *src, Image_Desc *dst, Image_Rect *rect,
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float kx, float ky)
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{
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int xd, yd, xs, ys, r, g, b;
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double dxs, dys;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %p %.3f %.3f)\n", __func__,
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src, dst, rect, kx, ky);
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#endif
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for (yd=0; yd<dst->height; yd++) {
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dys = (double)rect->y + (((double)yd) / ky);
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ys = (int)dys;
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for (xd=0; xd<dst->width; xd++) {
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dxs = (double)rect->x + ((double)xd / kx);
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xs = (int)dxs;
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if ( Image_xy_inside(src, xs, ys) )
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{
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/* see 'scale.c' for this func */
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Image_getpix_bilin(src, dxs, dys, &r, &g, &b);
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}
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else
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{ r = g = b = 127; }
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Image_plotRGB(dst, xd, yd, r, g, b);
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}
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}
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return FUNC_IS_BETA;
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}
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/*::------------------------------------------------------------------::*/
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/* */
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/* nouveau Fri 23 Sep 2022 02:16:55 PM CEST */
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/* */
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int Image_zoom_extract(Image_Desc *src, Image_Desc *dst, Image_Rect *rect,
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int flags)
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{
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int foo;
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float kx, ky;
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#if DEBUG_LEVEL
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fprintf(stderr, ">>> %s ( %p %p %p 0x%x)\n", __func__, src, dst, rect, flags);
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#endif
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kx = (float)dst->width / (float)rect->w;
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ky = (float)dst->height / (float)rect->h;
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#if DEBUG_LEVEL
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fprintf(stderr, " kx %8.3f ky %8.3f\n", kx, ky);
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#endif
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/* this is ugly code ! */
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if (flags)
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{ foo = Image_zoom_001(src, dst, rect, kx, ky); }
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else
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{ foo = Image_zoom_000(src, dst, rect, kx, ky); }
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if (foo) {
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fprintf(stderr, "got %d in %s\n", foo, __func__);
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return foo;
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}
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return FUNC_IS_ALPHA;
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}
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/*::------------------------------------------------------------------::*/
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@ -4,7 +4,7 @@
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http:///la.buvette.org/devel/libimage/
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*/
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#ifndef IMAGE_VERSION_STRING
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#define IMAGE_VERSION_STRING "0.4.51 pl 38"
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#define IMAGE_VERSION_STRING "0.4.51 pl 39"
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/*::------------------------------------------------------------------::*/
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/*
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