145 lines
2.5 KiB
C
145 lines
2.5 KiB
C
/*
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* ANAMORPHOSES
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*
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* new 18 octobre 2003
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include "tthimage.h"
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/*::------------------------------------------------------------------::*/
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int
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Image_anmo_X(Image_Desc *src, Image_Desc *dst)
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{
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int x, y;
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double dnormx, dnormy;
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fprintf(stderr, "%s : %p -> %p\n", __func__, src, dst);
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/*
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* we scan the destination picture
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*/
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for (y=0; y<dst->height; y++)
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{
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dnormy = (double)y/(double)dst->height;
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for (x=0; x<dst->width; x++)
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{
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dnormx = (double)x/(double)dst->width;
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}
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}
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return FUNC_NOT_FINISH;
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}
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/*::------------------------------------------------------------------::*/
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/*
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* warning: this is a test function. prototype may change
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* in a near futur.
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*/
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int
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Image_anmo_grille(Image_Desc *dst)
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{
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int x, y;
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if (dst->magic != MAGIC_OF_IMAGE)
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{
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fprintf(stderr, "Grille Anamorphose: need Dead Beef!\n");
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return NOT_AN_IMAGE_DESC;
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}
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return FUNC_NOT_FINISH;
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}
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/*::------------------------------------------------------------------::*/
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/*
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* warning: this is a test function. prototype may change
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* in a not so near futur.
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*/
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#define STAT 1
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int
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Image_anmo_essai_0(char *nomtga, int w, int h, int flgtxt)
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{
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Image_Desc *image;
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int x, y, x2, y2;
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double dx, dy;
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double angle;
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int xorg, yorg;
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double xamp, yamp;
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#if STAT
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long nb_in, nb_out;
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#endif
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image = Image_alloc(w, h, 3);
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if (image==NULL)
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{
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fprintf(stderr, "%s: Abend: no mem\n", __FILE__);
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exit(5);
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}
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fprintf(stderr, "--> %s %s %s\n", __FILE__, __DATE__, __TIME__);
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/* déterminer les parametres de la deformation */
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xorg = w / 2; yorg = h - 10;
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xamp = 1.0; yamp = 1.0;
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#if STAT
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nb_in = nb_out = 0L;
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#endif
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/*
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* we scan all the destination picture...
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*/
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for (x=0; x<w; x++)
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{
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dx = (double)x;
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angle = (dx/(double)w * (M_PI/1)) + M_PI;
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for (y=0; y<h; y++)
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{
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dy = (double)y;
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x2 = (int)(cos(angle) * (dy*xamp)) + xorg;
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y2 = (int)(sin(angle) * (dy*yamp)) + yorg;
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if (x2>=0 && y2>=0 && x2<w-1 && y2<h-1)
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{
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/* Image_plotRGB(image, x2, y2, x*2, 200, y*2); */
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(image->Rpix[y])[x] = x2*2;
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(image->Gpix[y])[x] = 200;
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(image->Bpix[y])[x] = y2*2;
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#if STAT
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nb_in++;
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#endif
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}
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#if STAT
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else
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{
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nb_out++;
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}
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#endif
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}
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}
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#if STAT
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fprintf(stderr, " %ld in, %ld out\n", nb_in, nb_out);
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#endif
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Image_cadre_A(image);
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if (flgtxt)
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{
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Image_marque_timestamp(image, "essai anamorphose", NULL, 1);
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}
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Image_TGA_save(nomtga, image, 0);
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Image_DeAllocate(image); free(image);
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return FUNC_NOT_FINISH;
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}
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/*::------------------------------------------------------------------::*/
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