47e44cb80f
Created Mirror and Flip Magic tools as plugins (except sound); hooks added to Magic plugin API to allow starter and starter-undo mirror/flip. Created Fade and Darken Magic tools as plugins. Moved magic tool sounds to 'magic'. Added flip and mirror icons to main Tux Paint UI (used to share magic tools') Created 'tp-magic-config.sh' to get CFLAGS for compiling magic tool plugins. Improved magic tool plugin API. Committed some documentation on magic tool plugin API.
144 lines
3.1 KiB
C
144 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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enum {
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TOOL_FADE,
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TOOL_DARKEN,
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NUM_TOOLS
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};
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#define min(a,b) ((a) < (b) ? (a) : (b))
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#define max(a,b) ((a) > (b) ? (a) : (b))
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// No setup required:
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int fade_darken_init(magic_api * api)
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{
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return(1);
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}
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// Multiple tools:
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int fade_darken_get_tool_count(magic_api * api)
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{
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return(NUM_TOOLS);
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}
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// Load our icon:
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SDL_Surface * fade_darken_get_icon(magic_api * api, int which)
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{
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char fname[1024];
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if (which == TOOL_FADE)
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{
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snprintf(fname, sizeof(fname), "%s/images/magic/fade.png",
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api->data_directory);
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}
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else if (which == TOOL_DARKEN)
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{
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snprintf(fname, sizeof(fname), "%s/images/magic/darken.png",
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api->data_directory);
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}
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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 * fade_darken_get_name(magic_api * api, int which)
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{
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if (which == TOOL_FADE)
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return(strdup(gettext("Lighten")));
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else if (which == TOOL_DARKEN)
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return(strdup(gettext("Darken")));
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return(NULL);
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}
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// Return our description, localized:
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char * fade_darken_get_description(magic_api * api, int which)
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{
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if (which == TOOL_FADE)
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return(strdup(
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gettext("Click and move to fade the colors.")));
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else if (which == TOOL_DARKEN)
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return(strdup(
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gettext("Click and move to darken the colors.")));
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return(NULL);
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}
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// Callback that does the fade_darken color effect on a circle centered around x,y
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void do_fade_darken(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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if (which == TOOL_FADE)
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{
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r = min(r + 48, 255);
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g = min(g + 48, 255);
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b = min(b + 48, 255);
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}
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else if (which == TOOL_DARKEN)
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{
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r = max(r - 48, 0);
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g = max(g - 48, 0);
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b = max(b - 48, 0);
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}
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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_fade_darken()' callback over a line
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void fade_darken_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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{
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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_fade_darken);
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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_fade_darken()' callback at a single point
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void fade_darken_click(magic_api * api, 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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fade_darken_drag(api, which, canvas, last, x, y, x, y);
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}
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// No setup happened:
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void fade_darken_shutdown(magic_api * api)
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{
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}
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// We don't use colors
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void fade_darken_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 fade_darken_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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