176 lines
3.5 KiB
C
176 lines
3.5 KiB
C
/*
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patterns.c
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------------------
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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_pattern_000(Image_Desc *img, int foo)
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{
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int x, y, xx, yy, r, g, b;
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#if DEBUG_LEVEL
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fprintf(stderr, "%s : foo = %d\n", __func__, foo);
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#endif
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for (x=0; x<img->width; x++)
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{
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xx = (x * 256) / img->width;
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for (y=0; y<img->height; y++)
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{
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yy = (y * 256) / img->height;
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r = xx & yy & foo;
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g = ((xx * yy) & 0xf8 );
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b = xx ^ yy;
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Image_plotRGB(img, x, y, r, g, b);
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}
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}
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/*
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sometime, a newbie ask me: "why use intermediate vars: r, g, and b ?"
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my answer was: "clarity of code, small scarabée".
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*/
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return FUNC_IS_BETA;
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}
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/*::------------------------------------------------------------------::*/
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int
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Image_pattern_001(Image_Desc *img, int foo)
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{
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int x, y;
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#if DEBUG_LEVEL
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fprintf(stderr, "%s : foo is %d\n", __func__, foo);
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#endif
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for (x=0; x<img->width; x++)
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for (y=0; y<img->height; y++)
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Image_plotRGB(img, x, y, x^y^foo, (x*y)>>4, x&y);
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return FUNC_NOT_FINISH;
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}
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/*::------------------------------------------------------------------::*/
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int
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Image_pattern_002(Image_Desc *img, int foo)
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{
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int x, y, x2, y2;
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#if DEBUG_LEVEL
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fprintf(stderr, "Pattern 002: %d\n", foo);
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#endif
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for (x=0; x<img->width; x++)
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{
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x2 = (x * 256) / img->width;
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for (y=0; y<img->height; y++)
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{
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y2 = (y * 256) / img->height;
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Image_plotRGB(img, x, y, (x2/2)&(y2/2)&foo, (x2*y2)>>3, x2^y2);
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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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int
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Image_pattern_003(Image_Desc *img, int foo)
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{
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int x, x2, y, y2;
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#if DEBUG_LEVEL
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fprintf(stderr, "Pattern 003: foo is %d\n", foo);
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#endif
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/* added some ugly code the 28 february 2008 */
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for (x=0; x<img->width; x++)
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{
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x2 = (x * 256) / img->width;
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for (y=0; y<img->height; y++)
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{
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y2 = (y * 256) / img->height;
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Image_plotRGB(img, x, y, (x2/4)&(y2/4)&foo, (x2*y2)>>5, x2^y2);
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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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int
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Image_pattern_004(Image_Desc *img, int a, int b, int c, int d)
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{
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#if DEBUG_LEVEL
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fprintf(stderr, "Pattern 004: %d, %d, %d, %d\n", a, b, c, d);
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#endif
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fprintf(stderr, "NO CODE HERE\n");
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return FUNC_NOT_FINISH;
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}
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/*::------------------------------------------------------------------::*/
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int Image_pattern_005(Image_Desc *img, RGB_map *map)
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{
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int x, y;
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double fx, fy;
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int idx;
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if (NULL == map) {
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fprintf(stderr, "in %s:%s, map is NULL\n",
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__FILE__, __func__);
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return NULL_POINTER;
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}
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for (y=0; y<img->height; y++)
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{
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fy = (double)y;
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for (x=0; x<img->width; x++)
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{
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fx = (double)x;
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idx = (int)(127.0+(sin(fx)*cos(fy)*254.99));
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idx &= 0xff;
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(img->Gpix[y])[x] = map->green[idx];
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(img->Bpix[y])[x] = map->blue[idx];
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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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int
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Image_pattern_042(Image_Desc *img, int foo)
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{
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int x, y, r, g, b;
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#if DEBUG_LEVEL
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fprintf(stderr, "Pattern 042: threshold level is %d\n", foo);
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#endif
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r = g = b = 42;
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for (x=0; x<img->width; x++)
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{
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for (y=0; y<img->height; y++)
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{
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r += rand() % 4;
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if (r > foo) r = 0;
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g += rand() % 4;
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if (g > foo) g = 0;
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b += rand() % 4;
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if (b > foo) b = 0;
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/* Image_plotRGB(img, x, y, r, g, b); */
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(img->Rpix[y])[x] = r;
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(img->Gpix[y])[x] = g;
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(img->Bpix[y])[x] = b;
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}
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}
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return OLL_KORRECT;
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}
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/*::------------------------------------------------------------------::*/
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