New Magic tool: Color Sep. (aka 3D Glasses)
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Bill Kendrick
parent
1277ad5cf6
commit
71ea0358c2
5 changed files with 232 additions and 2 deletions
218
magic/src/colorsep.c
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218
magic/src/colorsep.c
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/* colorsep.c
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Color separation effect (a la red/cyan aka red/blue 3D glasses).
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Bill Kendrick
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Last updated: February 21, 2023
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*/
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#include <stdio.h>
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#include <string.h>
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#include <libintl.h>
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#include <math.h>
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#include "tp_magic_api.h"
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#include "SDL_image.h"
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#include "SDL_mixer.h"
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enum {
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COLORSEP_MODE_RED_CYAN,
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COLORSEP_MODE_GREEN_PURPLE,
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COLORSEP_MODE_BLUE_YELLOW
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};
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Mix_Chunk *snd_effect = NULL;
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int colorsep_click_x, colorsep_click_y;
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int colorsep_mode = COLORSEP_MODE_RED_CYAN;
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Uint32 colorsep_api_version(void);
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int colorsep_init(magic_api * api);
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int colorsep_get_tool_count(magic_api * api);
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SDL_Surface *colorsep_get_icon(magic_api * api, int which);
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char *colorsep_get_name(magic_api * api, int which);
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int colorsep_get_group(magic_api * api, int which);
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char *colorsep_get_description(magic_api * api, int which, int mode);
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int colorsep_requires_colors(magic_api * api, int which);
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int colorsep_modes(magic_api * api, int which);
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void colorsep_shutdown(magic_api * api);
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void colorsep_click(magic_api * api, int which, int mode,
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SDL_Surface * canvas, SDL_Surface * snapshot, int x,
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int y, SDL_Rect * update_rect);
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void colorsep_set_color(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, Uint8 r, Uint8 g, Uint8 b, SDL_Rect * update_rect);
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void colorsep_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int ox, int oy, int x, int y,
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SDL_Rect * update_rect);
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void colorsep_release(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * snapshot, int x, int y,
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SDL_Rect * update_rect);
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void colorsep_switchin(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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void colorsep_switchout(magic_api * api, int which, int mode,
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SDL_Surface * canvas);
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Uint32 colorsep_api_version(void)
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{
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return (TP_MAGIC_API_VERSION);
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}
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int colorsep_init(magic_api * api)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%ssounds/magic/colorsep.ogg",
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api->data_directory);
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snd_effect = Mix_LoadWAV(fname);
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return (1);
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}
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int colorsep_get_tool_count(magic_api * api ATTRIBUTE_UNUSED)
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{
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return (1);
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}
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SDL_Surface *colorsep_get_icon(magic_api * api, int which ATTRIBUTE_UNUSED)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%simages/magic/colorsep.png",
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api->data_directory);
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return (IMG_Load(fname));
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}
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char *colorsep_get_name(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return strdup(gettext("Color Sep."));
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}
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int colorsep_get_group(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return MAGIC_TYPE_COLOR_FILTERS;
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}
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char *colorsep_get_description(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED)
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{
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return strdup(gettext("Click and drag to separate your picture's colors (based on your color choice: red from cyan, green from purple, or blue from yellow)."));
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}
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int colorsep_requires_colors(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return 1;
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}
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int colorsep_modes(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED)
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{
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return MODE_PAINT;
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}
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void colorsep_shutdown(magic_api * api ATTRIBUTE_UNUSED)
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{
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if (snd_effect != NULL)
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Mix_FreeChunk(snd_effect);
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}
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void
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colorsep_click(magic_api * api, int which, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas, SDL_Surface * snapshot, int x, int y,
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SDL_Rect * update_rect)
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{
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if (snd_effect != NULL)
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api->stopsound();
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/* (Start off as if they clicked off to the side a little, so that
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* quick click+release will split the image bit by bit */
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colorsep_click_x = x;
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colorsep_click_y = y;
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colorsep_drag(api, which, canvas, snapshot, x, y, x - 10, y, update_rect);
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}
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void
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colorsep_drag(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED, SDL_Surface * canvas,
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SDL_Surface * snapshot, int ox ATTRIBUTE_UNUSED, int oy ATTRIBUTE_UNUSED,
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int x, int y, SDL_Rect * update_rect)
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{
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int xx, yy, offset_x, offset_y;
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Uint8 r1, g1, b1, r2, g2, b2;
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offset_x = colorsep_click_x - x;
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offset_y = colorsep_click_y - y;
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api->playsound(snd_effect, (((-offset_x * 255) / canvas->w) + 128), 255);
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for (yy = 0; yy < canvas->h; yy++) {
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for (xx = 0; xx < canvas->w; xx++) {
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SDL_GetRGB(api->getpixel(snapshot, xx + offset_x / 2, yy + offset_y / 2), snapshot->format, &r1, &g1, &b1);
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SDL_GetRGB(api->getpixel(snapshot, xx - offset_x / 2, yy - offset_y / 2), snapshot->format, &r2, &g2, &b2);
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if (colorsep_mode == COLORSEP_MODE_RED_CYAN) {
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api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r1, g2, b2));
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} else if (colorsep_mode == COLORSEP_MODE_GREEN_PURPLE) {
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api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r2, g1, b2));
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} else if (colorsep_mode == COLORSEP_MODE_BLUE_YELLOW) {
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api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r2, g2, b1));
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}
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}
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}
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update_rect->x = 0;
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update_rect->y = 0;
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update_rect->w = canvas->w;
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update_rect->h = canvas->h;
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}
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void colorsep_release(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * snapshot ATTRIBUTE_UNUSED,
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int x ATTRIBUTE_UNUSED, int y ATTRIBUTE_UNUSED,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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}
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void colorsep_set_color(magic_api * api ATTRIBUTE_UNUSED, int which ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED,
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SDL_Surface * last ATTRIBUTE_UNUSED,
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Uint8 r, Uint8 g, Uint8 b,
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SDL_Rect * update_rect ATTRIBUTE_UNUSED)
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{
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r >>= 4;
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g >>= 4;
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b >>= 4;
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/* If the color chosen is very strong in some colors, separate it */
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if ((r > g && r > b) || (b > r && g > r)) {
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colorsep_mode = COLORSEP_MODE_RED_CYAN;
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} else if ((g > r && g > b) || (r > g && b > g)) {
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colorsep_mode = COLORSEP_MODE_GREEN_PURPLE;
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} else if ((b > r && b > g) || (r > b && g > b)) {
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colorsep_mode = COLORSEP_MODE_BLUE_YELLOW;
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} else {
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/* No winner? Default to the most comment, red/cyan */
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colorsep_mode = COLORSEP_MODE_RED_CYAN;
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}
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}
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void colorsep_switchin(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED, int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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}
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void colorsep_switchout(magic_api * api ATTRIBUTE_UNUSED,
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int which ATTRIBUTE_UNUSED,
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int mode ATTRIBUTE_UNUSED,
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SDL_Surface * canvas ATTRIBUTE_UNUSED)
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{
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}
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