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Completed Negative Magic tool as a plugin (except sound).

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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.
This commit is contained in:
William Kendrick 2007-07-05 19:20:58 +00:00
parent c6aa0af0a9
commit 47e44cb80f
32 changed files with 917 additions and 729 deletions
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117
magic/src/negative.c
View file

@ -1,111 +1,106 @@
#include <stdio.h>
#include <string.h>
#include <libintl.h>
#include "tp_magic_api.h"
#include "SDL_image.h"
#include "magic_helpers.h"
void init()
// No setup required:
int negative_init(magic_api * api)
{
printf("negative plugin initializing\n");
}
int get_tool_count(void)
{
printf("negative tool reporting tool count: 1\n");
return(1);
}
SDL_Surface * get_icon(int which)
// Only one tool:
int negative_get_tool_count(magic_api * api)
{
printf("Loading icon: " DATA_PREFIX "/images/magic/negative.png\n");
return(IMG_Load(DATA_PREFIX "/images/magic/negative.png"));
return(1);
}
char * get_name(int which)
// Load our icon:
SDL_Surface * negative_get_icon(magic_api * api, int which)
{
/* Only 1 tool; ignoring 'which' */
char fname[1024];
snprintf(fname, sizeof(fname), "%s/images/magic/negative.png",
api->data_directory);
return(IMG_Load(fname));
}
// Return our name, localized:
char * negative_get_name(magic_api * api, int which)
{
return(strdup(gettext("Negative")));
}
char * get_description(int which)
// Return our description, localized:
char * negative_get_description(magic_api * api, int which)
{
/* Only 1 tool; ignoring 'which' */
return(strdup(gettext("Click and move the mouse around to draw a negative.")));
return(strdup(
gettext("Click and move the mouse around to draw a negative.")));
}
void drag(int which, SDL_Surface * canvas, SDL_Surface * last, int ox, int oy, int x, int y);
void click(int which, SDL_Surface * canvas, SDL_Surface * last, int x, int y)
{
/*
SDL_Rect src, dest;
src.x = x - 12;
src.y = y - 12;
src.w = 16;
src.h = 16;
dest.x = x - 8;
dest.y = y - 8;
dest.w = 16;
dest.h = 16;
SDL_BlitSurface(last, &src, canvas, &dest);
*/
drag(which, canvas, last, x, y, x, y);
}
void drag(int which, SDL_Surface * canvas, SDL_Surface * last, int ox, int oy, int x, int y)
// Callback that does the negative color effect on a circle centered around x,y
void do_negative(void * ptr, int which,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y)
{
int xx, yy;
Uint8 r, g, b;
void (*putpixel) (SDL_Surface *, int, int, Uint32) =
MAGIC_putpixels[canvas->format->BytesPerPixel];
Uint32(*getpixel_last) (SDL_Surface *, int, int);
getpixel_last = MAGIC_getpixels[last->format->BytesPerPixel];
SDL_LockSurface(last);
SDL_LockSurface(canvas);
magic_api * api = (magic_api *) ptr;
for (yy = y - 16; yy < y + 16; yy++)
{
for (xx = x - 16; xx < x + 16; xx++)
{
if (MAGIC_in_circle(xx - x, yy - y, 16))
if (api->in_circle(xx - x, yy - y, 16))
{
SDL_GetRGB(getpixel_last(last, xx, yy), last->format, &r, &g, &b);
SDL_GetRGB(api->getpixel(last, xx, yy), last->format, &r, &g, &b);
r = 0xFF - r;
g = 0xFF - g;
b = 0xFF - b;
putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));
api->putpixel(canvas, xx, yy, SDL_MapRGB(canvas->format, r, g, b));
}
}
}
}
// Ask Tux Paint to call our 'do_negative()' callback over a line
void negative_drag(magic_api * api, int which, SDL_Surface * canvas,
SDL_Surface * last, int ox, int oy, int x, int y)
{
SDL_LockSurface(last);
SDL_LockSurface(canvas);
api->line(which, canvas, last, ox, oy, x, y, 1, do_negative);
SDL_UnlockSurface(canvas);
SDL_UnlockSurface(last);
}
void shutdown()
// Ask Tux Paint to call our 'do_negative()' callback at a single point
void negative_click(magic_api * api, int which,
SDL_Surface * canvas, SDL_Surface * last,
int x, int y)
{
printf("negative plugin shutting down\n");
negative_drag(api, which, canvas, last, x, y, x, y);
}
void set_color(Uint8 r, Uint8 g, Uint8 b)
// No setup happened:
void negative_shutdown(magic_api * api)
{
/* Doesn't use color; ignoring */
}
int requires_colors(int which)
// We don't use colors
void negative_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
{
/* (Only 1 tool; ignoring 'which') */
return 0; // Don't need a color palette
}
// We don't use colors
int negative_requires_colors(magic_api * api, int which)
{
return 0;
}