137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
#include <stdio.h>
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#include <string.h>
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#include <libintl.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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Mix_Chunk * negative_snd;
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// No setup required:
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int negative_init(magic_api * api)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%s/sounds/magic/negative.wav",
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api->data_directory);
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negative_snd = Mix_LoadWAV(fname);
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return(1);
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}
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Uint32 negative_api_version(void) { return(TP_MAGIC_API_VERSION); }
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// Only one tool:
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int negative_get_tool_count(magic_api * api)
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{
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return(1);
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}
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// Load our icon:
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SDL_Surface * negative_get_icon(magic_api * api, int which)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname), "%s/images/magic/negative.png",
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api->data_directory);
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return(IMG_Load(fname));
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}
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// Return our name, localized:
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char * negative_get_name(magic_api * api, int which)
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{
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return(strdup(gettext("Negative")));
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}
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// Return our description, localized:
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char * negative_get_description(magic_api * api, int which)
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{
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return(strdup(
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gettext("Click and move the mouse around to draw a negative.")));
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}
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// Callback that does the negative color effect on a circle centered around x,y
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void do_negative(void * ptr, int which,
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SDL_Surface * canvas, SDL_Surface * last,
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int x, int y)
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{
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int xx, yy;
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Uint8 r, g, b;
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magic_api * api = (magic_api *) ptr;
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for (yy = y - 16; yy < y + 16; yy++)
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{
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for (xx = x - 16; xx < x + 16; xx++)
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{
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if (api->in_circle(xx - x, yy - y, 16))
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{
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SDL_GetRGB(api->getpixel(last, xx, yy), last->format, &r, &g, &b);
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r = 0xFF - r;
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g = 0xFF - g;
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b = 0xFF - b;
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api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));
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}
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}
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}
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}
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// Ask Tux Paint to call our 'do_negative()' callback over a line
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void negative_drag(magic_api * api, int which, SDL_Surface * canvas,
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SDL_Surface * last, int ox, int oy, int x, int y,
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SDL_Rect * update_rect)
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{
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SDL_LockSurface(last);
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SDL_LockSurface(canvas);
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api->line(which, canvas, last, ox, oy, x, y, 1, do_negative);
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if (ox > x) { int tmp = ox; ox = x; x = tmp; }
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if (oy > y) { int tmp = oy; oy = y; y = tmp; }
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update_rect->x = ox - 16;
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update_rect->y = oy - 16;
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update_rect->w = (x + 16) - update_rect->x;
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update_rect->h = (y + 16) - update_rect->h;
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api->playsound(negative_snd, (x * 255) / canvas->w, 255);
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SDL_UnlockSurface(canvas);
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SDL_UnlockSurface(last);
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}
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// Ask Tux Paint to call our 'do_negative()' callback at a single point
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void negative_click(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * last,
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int x, int y, SDL_Rect * update_rect)
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{
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negative_drag(api, which, canvas, last, x, y, x, y, update_rect);
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}
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void negative_release(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * last,
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int x, int y, SDL_Rect * update_rect)
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{
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}
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void negative_shutdown(magic_api * api)
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{
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if (negative_snd != NULL)
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Mix_FreeChunk(negative_snd);
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}
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// We don't use colors
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void negative_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
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{
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}
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// We don't use colors
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int negative_requires_colors(magic_api * api, int which)
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{
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return 0;
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}
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