145 lines
3.6 KiB
C
145 lines
3.6 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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/* Our globals: */
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Mix_Chunk * smudge_snd;
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// No setup required:
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int smudge_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/smudge.wav",
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api->data_directory);
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smudge_snd = Mix_LoadWAV(fname);
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return(1);
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}
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Uint32 smudge_api_version(void) { return(TP_MAGIC_API_VERSION); }
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// We have multiple tools:
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int smudge_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 icons:
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SDL_Surface * smudge_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/smudge.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 names, localized:
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char * smudge_get_name(magic_api * api, int which)
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{
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return(strdup(gettext("Smudge")));
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}
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// Return our descriptions, localized:
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char * smudge_get_description(magic_api * api, int which)
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{
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return(strdup(gettext(
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"Click and move the mouse around to smudge the picture.")));
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}
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// Do the effect:
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void do_smudge(void * ptr, int which, SDL_Surface * canvas, SDL_Surface * last,
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int x, int y)
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{
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magic_api * api = (magic_api *) ptr;
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static double state[32][32][3];
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unsigned i = 32 * 32;
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double rate = api->button_down() ? 0.5 : 0.0;
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Uint8 r, g, b;
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while (i--)
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{
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int iy = i >> 5;
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int ix = i & 0x1f;
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// is it not on the circle of radius sqrt(120) at location 16,16?
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if ((ix - 16) * (ix - 16) + (iy - 16) * (iy - 16) > 120)
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continue;
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// it is on the circle, so grab it
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SDL_GetRGB(api->getpixel(canvas, x + ix - 16, y + iy - 16),
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last->format, &r, &g, &b);
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state[ix][iy][0] =
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rate * state[ix][iy][0] + (1.0 - rate) * api->sRGB_to_linear(r);
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state[ix][iy][1] =
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rate * state[ix][iy][1] + (1.0 - rate) * api->sRGB_to_linear(g);
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state[ix][iy][2] =
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rate * state[ix][iy][2] + (1.0 - rate) * api->sRGB_to_linear(b);
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// opacity 100% --> new data not blended w/ existing data
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api->putpixel(canvas, x + ix - 16, y + iy - 16,
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SDL_MapRGB(canvas->format, api->linear_to_sRGB(state[ix][iy][0]),
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api->linear_to_sRGB(state[ix][iy][1]),
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api->linear_to_sRGB(state[ix][iy][2])));
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}
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}
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// Affect the canvas on drag:
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void smudge_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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api->line(which, canvas, last, ox, oy, x, y, 1, do_smudge);
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api->playsound(smudge_snd, (x * 255) / canvas->w, 255);
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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 = x - 16;
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update_rect->y = y - 16;
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update_rect->w = (ox + 16) - update_rect->x;
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update_rect->h = (oy + 16) - update_rect->y;
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}
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// Affect the canvas on click:
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void smudge_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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smudge_drag(api, which, canvas, last, x, y, x, y, update_rect);
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}
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// Affect the canvas on click:
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void smudge_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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// No setup happened:
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void smudge_shutdown(magic_api * api)
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{
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if (smudge_snd != NULL)
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Mix_FreeChunk(smudge_snd);
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}
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// Record the color from Tux Paint:
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void smudge_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
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{
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}
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// Use colors:
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int smudge_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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