Created a "Distortion" magic tooll
This commit is contained in:
William Kendrick
parent
fa99f6cbd0
commit
a440a0969b
3 changed files with 238 additions and 2 deletions
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@ -126,6 +126,7 @@ $Id$
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* New Magic tools:
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----------------
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* Calligraphy
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* Distortion
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* Emboss
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* Flower
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* Foam
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@ -6,7 +6,7 @@
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# bill@newbreedsoftware.com
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# http://www.tuxpaint.org/
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# July 2007 - August 9, 2007
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# July 2007 - October 24, 2007
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SO_TYPE=so
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@ -47,7 +47,8 @@ all: negative.$(SO_TYPE) \
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ripples.$(SO_TYPE) \
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light.$(SO_TYPE) \
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shift.$(SO_TYPE) \
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calligraphy.$(SO_TYPE)
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calligraphy.$(SO_TYPE) \
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distortion.$(SO_TYPE)
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@strip *.$(SO_TYPE)
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install:
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@ -163,3 +164,8 @@ shift.$(SO_TYPE): src/shift.c
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calligraphy.$(SO_TYPE): src/calligraphy.c
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@echo "Building Calligraphy magic tool"
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@$(CC) $(CFLAGS) -shared -o $@ $< $(PLUGIN_LIBS)
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distortion.$(SO_TYPE): src/distortion.c
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@echo "Building Distortion magic tool"
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@$(CC) $(CFLAGS) -shared -o $@ $< $(PLUGIN_LIBS)
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229
magic/src/distortion.c
Normal file
229
magic/src/distortion.c
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@ -0,0 +1,229 @@
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/*
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distortion.c
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Distortion Magic Tool Plugin
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Tux Paint - A simple drawing program for children.
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Copyright (c) 2002-2007 by Bill Kendrick and others; see AUTHORS.txt
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bill@newbreedsoftware.com
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http://www.tuxpaint.org/
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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(See COPYING.txt)
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Last updated: October 24, 2007
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$Id$
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*/
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/* Inclusion of header files: */
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/* -------------------------- */
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#include <stdio.h>
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#include <string.h> // For "strdup()"
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#include <libintl.h> // For "gettext()"
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#include "tp_magic_api.h" // Tux Paint "Magic" tool API header
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#include "SDL_image.h" // For IMG_Load(), to load our PNG icon
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#include "SDL_mixer.h" // For Mix_LoadWAV(), to load our sound effects
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/* Our global variables: */
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/* --------------------- */
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/* Sound effects: */
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Mix_Chunk * snd_effect;
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/* Our local function prototypes: */
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/* ------------------------------ */
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// These functions are called by other functions within our plugin,
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// so we provide a 'prototype' of them, so the compiler knows what
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// they accept and return. This lets us use them in other functions
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// that are declared _before_ them.
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void distortion_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 distortion_line_callback(void * ptr, int which,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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int x, int y);
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/* Setup Functions: */
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/* ---------------- */
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Uint32 distortion_api_version(void)
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{
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return(TP_MAGIC_API_VERSION);
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}
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// Initialization
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int distortion_init(magic_api * api)
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{
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char fname[1024];
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snprintf(fname, sizeof(fname),
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"%s/sounds/magic/distortion.ogg",
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api->data_directory);
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// Try to load the file!
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snd_effect = Mix_LoadWAV(fname);
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return(1);
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}
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// Report our tool count
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int distortion_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 icons
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SDL_Surface * distortion_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/distortion.png",
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api->data_directory);
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// Try to load the image, and return the results to Tux Paint:
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return(IMG_Load(fname));
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}
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// Report our "Magic" tool names
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char * distortion_get_name(magic_api * api, int which)
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{
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return(strdup(gettext("Distortion")));
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}
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// Report our "Magic" tool descriptions
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char * distortion_get_description(magic_api * api, int which)
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{
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return(strdup(gettext("Click and drag the mouse to cause a distortion in your picture.")));
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}
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// Report whether we accept colors
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int distortion_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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// Shut down
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void distortion_shutdown(magic_api * api)
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{
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Mix_FreeChunk(snd_effect);
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}
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/* Functions that respond to events in Tux Paint: */
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/* ---------------------------------------------- */
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// Affect the canvas on click:
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void distortion_click(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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int x, int y, SDL_Rect * update_rect)
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{
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distortion_drag(api, which, canvas, snapshot, x, y, x, y, update_rect);
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}
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// Affect the canvas on drag:
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void distortion_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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{
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api->line((void *) api, which, canvas, snapshot,
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ox, oy, x, y, 1, distortion_line_callback);
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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 - 8;
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update_rect->y = oy - 8;
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update_rect->w = (x + 8) - update_rect->x;
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update_rect->h = (y + 8) - update_rect->h;
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api->playsound(snd_effect,
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(x * 255) / canvas->w, // pan
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255); // distance
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}
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// Affect the canvas on release:
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void distortion_release(magic_api * api, int which,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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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 distortion_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
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{
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}
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// Our "callback" function
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void distortion_line_callback(void * ptr, int which,
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SDL_Surface * canvas, SDL_Surface * snapshot,
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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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int xx, yy;
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// This function handles both of our tools, so we need to check which
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// is being used right now. We compare the 'which' argument that
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// Tux Paint sends to us with the values we enumerated above.
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for (yy = -8; yy < 8; yy++)
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{
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for (xx = -8; xx < 8; xx++)
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{
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if (api->in_circle(xx, yy, 8))
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{
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api->putpixel(canvas, x + xx, y + yy,
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api->getpixel(snapshot,
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x + xx / 2, y + yy));
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}
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}
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}
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}
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