Andrew Corcoran's first three magic tools funded by gsoc.
This commit is contained in:
secretlondon
parent
ae47481914
commit
0524520d07
5 changed files with 669 additions and 0 deletions
|
|
@ -45,6 +45,9 @@ $Id$
|
|||
documentation. This software is provided "as is" without express or
|
||||
implied warranty.
|
||||
|
||||
Some magic tools by:
|
||||
Andrew Corcoran <akanewbie@gmail.com>
|
||||
|
||||
|
||||
* Graphics
|
||||
|
||||
|
|
|
|||
|
|
@ -14,6 +14,11 @@ $Id$
|
|||
* Silver Frame
|
||||
Caroline Ford <caroline.ford.work@googlemail.com>
|
||||
|
||||
* New Magic Tools:
|
||||
----------------
|
||||
* BlurAll, Sharpen and BlackandWhite
|
||||
Andrew Corcoran <akanewbie@gmail.com>
|
||||
|
||||
2008.June.26 (0.9.20)
|
||||
* New translations:
|
||||
-----------------
|
||||
|
|
|
|||
205
magic/src/blackAndWhite.c
Normal file
205
magic/src/blackAndWhite.c
Normal file
|
|
@ -0,0 +1,205 @@
|
|||
/*
|
||||
blackAndWhite.c
|
||||
|
||||
blackAndWhite, Convert the image to greyscale or threshold it into pure black and pure white
|
||||
Tux Paint - A simple drawing program for children.
|
||||
|
||||
Copyright (c) 2002-2007 by Bill Kendrick and others; see AUTHORS.txt
|
||||
bill@newbreedsoftware.com
|
||||
http://www.tuxpaint.org/
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
(See COPYING.txt)
|
||||
|
||||
Last updated: June 6, 2008
|
||||
$Id$
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <libintl.h>
|
||||
#include "tp_magic_api.h"
|
||||
#include "SDL_image.h"
|
||||
#include "SDL_mixer.h"
|
||||
#include <math.h>
|
||||
#include <limits.h>
|
||||
|
||||
#ifndef gettext_noop
|
||||
#define gettext_noop(String) String
|
||||
#endif
|
||||
|
||||
enum {
|
||||
TOOL_BANDW,
|
||||
TOOL_THRESHOLD,
|
||||
bandw_NUM_TOOLS
|
||||
};
|
||||
|
||||
static Mix_Chunk * bandw_snd_effect[bandw_NUM_TOOLS];
|
||||
|
||||
const char * bandw_snd_filenames[bandw_NUM_TOOLS] = {
|
||||
"flip.wav",
|
||||
"flip.wav"
|
||||
};
|
||||
const char * bandw_icon_filenames[bandw_NUM_TOOLS] = {
|
||||
"flip.png",
|
||||
"flip.png"
|
||||
};
|
||||
const char * bandw_names[bandw_NUM_TOOLS] = {
|
||||
gettext_noop("Black & White"),
|
||||
gettext_noop("Threshold")
|
||||
};
|
||||
const char * bandw_descs[bandw_NUM_TOOLS] = {
|
||||
gettext_noop("Click to convert the image to greyscale."),
|
||||
gettext_noop("Click to threshold the image into black and white regions.")
|
||||
};
|
||||
|
||||
Uint32 blackAndWhite_api_version(void) { return(TP_MAGIC_API_VERSION); }
|
||||
|
||||
//Load sounds
|
||||
int blackAndWhite_init(magic_api * api){
|
||||
int i;
|
||||
char fname[1024];
|
||||
|
||||
for (i = 0; i < bandw_NUM_TOOLS; i++){
|
||||
snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, bandw_snd_filenames[i]);
|
||||
bandw_snd_effect[i] = Mix_LoadWAV(fname);
|
||||
}
|
||||
return(1);
|
||||
}
|
||||
|
||||
int blackAndWhite_get_tool_count(magic_api * api){
|
||||
return(bandw_NUM_TOOLS);
|
||||
}
|
||||
|
||||
// Load our icons:
|
||||
SDL_Surface * blackAndWhite_get_icon(magic_api * api, int which){
|
||||
char fname[1024];
|
||||
snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, bandw_icon_filenames[which]);
|
||||
return(IMG_Load(fname));
|
||||
}
|
||||
|
||||
// Return our names, localized:
|
||||
char * blackAndWhite_get_name(magic_api * api, int which){
|
||||
return(strdup(gettext(bandw_names[which])));
|
||||
}
|
||||
|
||||
// Return our descriptions, localized:
|
||||
char * blackAndWhite_get_description(magic_api * api, int which){
|
||||
return(strdup(gettext(bandw_descs[which])));
|
||||
}
|
||||
|
||||
//Calculates the grey scale value for a rgb pixel
|
||||
static int blackAndWhite_grey(Uint8 r1,Uint8 g1,Uint8 b1){
|
||||
return 0.3*r1+.59*g1+0.11*b1;
|
||||
}
|
||||
|
||||
// Do the effect:
|
||||
static void do_blackAndWhite(void * ptr,SDL_Surface * canvas, SDL_Surface * last, int which){
|
||||
|
||||
magic_api * api = (magic_api *) ptr;
|
||||
|
||||
int x,y;
|
||||
Uint8 r1,g1,b1;
|
||||
int min = INT_MAX;
|
||||
int max = 0;
|
||||
int thresholdValue;
|
||||
|
||||
for (y = 0; y < last->h; y++)
|
||||
{
|
||||
for (x=0; x < last->w; x++)
|
||||
{
|
||||
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r1, &g1, &b1);
|
||||
int greyValue = blackAndWhite_grey(r1,g1,b1);
|
||||
if (which == TOOL_BANDW)
|
||||
{
|
||||
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, greyValue, greyValue, greyValue));
|
||||
}else if(which == TOOL_THRESHOLD)
|
||||
{
|
||||
if (greyValue<min)
|
||||
{
|
||||
min=greyValue;
|
||||
}
|
||||
if (greyValue>max)
|
||||
{
|
||||
max=greyValue;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
thresholdValue = (max-min)/2;
|
||||
if (which == TOOL_THRESHOLD){
|
||||
for (y = 0; y < last->h; y++){
|
||||
for (x=0; x < last->w; x++){
|
||||
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r1, &g1, &b1);
|
||||
int greyValue = blackAndWhite_grey(r1,g1,b1);
|
||||
if (greyValue < thresholdValue){
|
||||
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, 0, 0, 0));
|
||||
}else{
|
||||
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, 255, 255, 255));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Affect the canvas on drag:
|
||||
void blackAndWhite_drag(magic_api * api, int which, SDL_Surface * canvas,
|
||||
SDL_Surface * last, int ox, int oy, int x, int y,
|
||||
SDL_Rect * update_rect){
|
||||
// No-op
|
||||
}
|
||||
|
||||
// Affect the canvas on click:
|
||||
void blackAndWhite_click(magic_api * api, int which,
|
||||
SDL_Surface * canvas, SDL_Surface * last,
|
||||
int x, int y, SDL_Rect * update_rect){
|
||||
update_rect->x = 0;
|
||||
update_rect->y = 0;
|
||||
update_rect->w = canvas->w;
|
||||
update_rect->h = canvas->h;
|
||||
do_blackAndWhite(api, canvas, last, which);
|
||||
api->playsound(bandw_snd_effect[which], 128, 255);
|
||||
}
|
||||
|
||||
// Affect the canvas on release:
|
||||
void blackAndWhite_release(magic_api * api, int which,
|
||||
SDL_Surface * canvas, SDL_Surface * last,
|
||||
int x, int y, SDL_Rect * update_rect)
|
||||
{
|
||||
}
|
||||
|
||||
// No setup happened:
|
||||
void blackAndWhite_shutdown(magic_api * api)
|
||||
{
|
||||
//Clean up sounds
|
||||
int i;
|
||||
for(i=0; i<bandw_NUM_TOOLS; i++){
|
||||
if(bandw_snd_effect[i] != NULL){
|
||||
Mix_FreeChunk(bandw_snd_effect[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Record the color from Tux Paint:
|
||||
void blackAndWhite_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
|
||||
{
|
||||
}
|
||||
|
||||
// Use colors:
|
||||
int blackAndWhite_requires_colors(magic_api * api, int which)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
188
magic/src/blurAll.c
Normal file
188
magic/src/blurAll.c
Normal file
|
|
@ -0,0 +1,188 @@
|
|||
/*
|
||||
blurAll.c
|
||||
|
||||
blurAll, Blur the whole image
|
||||
Tux Paint - A simple drawing program for children.
|
||||
|
||||
Copyright (c) 2002-2007 by Bill Kendrick and others; see AUTHORS.txt
|
||||
bill@newbreedsoftware.com
|
||||
http://www.tuxpaint.org/
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
(See COPYING.txt)
|
||||
|
||||
Last updated: June 6, 2008
|
||||
$Id$
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <libintl.h>
|
||||
#include "tp_magic_api.h"
|
||||
#include "SDL_image.h"
|
||||
#include "SDL_mixer.h"
|
||||
#include <math.h>
|
||||
#include <limits.h>
|
||||
|
||||
#ifndef gettext_noop
|
||||
#define gettext_noop(String) String
|
||||
#endif
|
||||
|
||||
enum {
|
||||
TOOL_BLURALL,
|
||||
blurAll_NUM_TOOLS
|
||||
};
|
||||
|
||||
static Mix_Chunk * blurAll_snd_effect[blurAll_NUM_TOOLS];
|
||||
|
||||
const char *blurAll_snd_filenames[blurAll_NUM_TOOLS] = {
|
||||
"flip.wav",
|
||||
};
|
||||
const char * blurAll_icon_filenames[blurAll_NUM_TOOLS] = {
|
||||
"flip.png",
|
||||
};
|
||||
const char * blurAll_names[blurAll_NUM_TOOLS] = {
|
||||
gettext_noop("Blur All"),
|
||||
};
|
||||
const char * blurAll_descs[blurAll_NUM_TOOLS] = {
|
||||
gettext_noop("Click to blur the whole image."),
|
||||
};
|
||||
|
||||
Uint32 blurAll_api_version(void) { return(TP_MAGIC_API_VERSION); }
|
||||
|
||||
//Load sounds
|
||||
int blurAll_init(magic_api * api){
|
||||
|
||||
int i;
|
||||
char fname[1024];
|
||||
|
||||
for (i = 0; i < blurAll_NUM_TOOLS; i++){
|
||||
snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, blurAll_snd_filenames[i]);
|
||||
blurAll_snd_effect[i] = Mix_LoadWAV(fname);
|
||||
}
|
||||
return(1);
|
||||
}
|
||||
|
||||
int blurAll_get_tool_count(magic_api * api){
|
||||
return(blurAll_NUM_TOOLS);
|
||||
}
|
||||
|
||||
// Load our icons:
|
||||
SDL_Surface * blurAll_get_icon(magic_api * api, int which){
|
||||
char fname[1024];
|
||||
snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, blurAll_icon_filenames[which]);
|
||||
return(IMG_Load(fname));
|
||||
}
|
||||
|
||||
// Return our names, localized:
|
||||
char * blurAll_get_name(magic_api * api, int which){
|
||||
return(strdup(gettext(blurAll_names[which])));
|
||||
}
|
||||
|
||||
// Return our descriptions, localized:
|
||||
char * blurAll_get_description(magic_api * api, int which){
|
||||
return(strdup(gettext(blurAll_descs[which])));
|
||||
}
|
||||
|
||||
// Do the effect:
|
||||
static void do_blurAll(void * ptr,SDL_Surface * canvas, SDL_Surface * last, int which){
|
||||
|
||||
magic_api * api = (magic_api *) ptr;
|
||||
|
||||
int x,y;
|
||||
int i,j;
|
||||
Uint8 temp[3];
|
||||
double blurValue[3];
|
||||
|
||||
//5x5 gaussiann weighting window
|
||||
const int weight[5][5] = { {1,4,7,4,1},
|
||||
{4,16,26,16,4},
|
||||
{7,26,41,26,7},
|
||||
{4,16,26,16,4},
|
||||
{1,4,7,4,1}};
|
||||
|
||||
for (y = 0; y < last->h; y++){
|
||||
for (x=0; x < last->w; x++){
|
||||
int k;
|
||||
//zero the holder for the new value
|
||||
for (k =0;k<3;k++){
|
||||
blurValue[k] =0;
|
||||
}
|
||||
for (i=-2;i<3;i++){
|
||||
for (j=-2;j<3;j++){
|
||||
//Add the pixels around the current one wieghted
|
||||
SDL_GetRGB(api->getpixel(last, x + i, y + j), last->format, &temp[0], &temp[1], &temp[2]);
|
||||
for (k =0;k<3;k++){
|
||||
blurValue[k] += temp[k]* weight[i+2][j+2];
|
||||
}
|
||||
}
|
||||
}
|
||||
for (k =0;k<3;k++){
|
||||
blurValue[k] /=273;
|
||||
}
|
||||
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, blurValue[0], blurValue[1], blurValue[2]));
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Affect the canvas on drag:
|
||||
void blurAll_drag(magic_api * api, int which, SDL_Surface * canvas,
|
||||
SDL_Surface * last, int ox, int oy, int x, int y,
|
||||
SDL_Rect * update_rect){
|
||||
// No-op
|
||||
}
|
||||
|
||||
// Affect the canvas on click:
|
||||
void blurAll_click(magic_api * api, int which,
|
||||
SDL_Surface * canvas, SDL_Surface * last,
|
||||
int x, int y, SDL_Rect * update_rect){
|
||||
update_rect->x = 0;
|
||||
update_rect->y = 0;
|
||||
update_rect->w = canvas->w;
|
||||
update_rect->h = canvas->h;
|
||||
do_blurAll(api, canvas, last, which);
|
||||
api->playsound(blurAll_snd_effect[which], 128, 255);
|
||||
}
|
||||
|
||||
// Affect the canvas on release:
|
||||
void blurAll_release(magic_api * api, int which,
|
||||
SDL_Surface * canvas, SDL_Surface * last,
|
||||
int x, int y, SDL_Rect * update_rect)
|
||||
{
|
||||
}
|
||||
|
||||
// No setup happened:
|
||||
void blurAll_shutdown(magic_api * api)
|
||||
{
|
||||
//Clean up sounds
|
||||
int i;
|
||||
for(i=0; i<blurAll_NUM_TOOLS; i++){
|
||||
if(blurAll_snd_effect[i] != NULL){
|
||||
Mix_FreeChunk(blurAll_snd_effect[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Record the color from Tux Paint:
|
||||
void blurAll_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
|
||||
{
|
||||
}
|
||||
|
||||
// Use colors:
|
||||
int blurAll_requires_colors(magic_api * api, int which)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
268
magic/src/sharpen.c
Normal file
268
magic/src/sharpen.c
Normal file
|
|
@ -0,0 +1,268 @@
|
|||
/*
|
||||
sharpen.c
|
||||
|
||||
Sharpen, Trace Contour and Silhouette Magic Tool Plugin
|
||||
Tux Paint - A simple drawing program for children.
|
||||
|
||||
Copyright (c) 2002-2007 by Bill Kendrick and others; see AUTHORS.txt
|
||||
bill@newbreedsoftware.com
|
||||
http://www.tuxpaint.org/
|
||||
|
||||
This program is free software; you can redistribute it and/or modify
|
||||
it under the terms of the GNU General Public License as published by
|
||||
the Free Software Foundation; either version 2 of the License, or
|
||||
(at your option) any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful,
|
||||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
GNU General Public License for more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License
|
||||
along with this program; if not, write to the Free Software
|
||||
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
||||
(See COPYING.txt)
|
||||
|
||||
Last updated: June 6, 2008
|
||||
$Id$
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <string.h>
|
||||
#include <libintl.h>
|
||||
#include "tp_magic_api.h"
|
||||
#include "SDL_image.h"
|
||||
#include "SDL_mixer.h"
|
||||
#include <math.h>
|
||||
#include <limits.h>
|
||||
|
||||
#ifndef gettext_noop
|
||||
#define gettext_noop(String) String
|
||||
#endif
|
||||
|
||||
/* Our globals: */
|
||||
|
||||
enum {
|
||||
TOOL_TRACE,
|
||||
TOOL_SHARPEN,
|
||||
TOOL_SILHOUETTE,
|
||||
sharpen_NUM_TOOLS
|
||||
};
|
||||
|
||||
//Holder for the unnormalised edge values
|
||||
double* sharpen_temp;
|
||||
|
||||
const int THRESHOLD = 50;
|
||||
|
||||
const double SHARPEN = 0.5;
|
||||
|
||||
static Mix_Chunk * sharpen_snd_effect[sharpen_NUM_TOOLS];
|
||||
|
||||
const char * sharpen_snd_filenames[sharpen_NUM_TOOLS] = {
|
||||
"flip.wav",
|
||||
"flip.wav",
|
||||
"flip.wav"
|
||||
};
|
||||
const char * sharpen_icon_filenames[sharpen_NUM_TOOLS] = {
|
||||
"flip.png",
|
||||
"flip.png",
|
||||
"flip.png"
|
||||
};
|
||||
const char * sharpen_names[sharpen_NUM_TOOLS] = {
|
||||
gettext_noop("Trace Contour"),
|
||||
gettext_noop("Sharpen"),
|
||||
gettext_noop("Silhouette")
|
||||
};
|
||||
const char * sharpen_descs[sharpen_NUM_TOOLS] = {
|
||||
gettext_noop("Click to trace the edges of objects in the image."),
|
||||
gettext_noop("Click to sharpen the image."),
|
||||
gettext_noop("Click to create a black and white silhouette of the image.")
|
||||
};
|
||||
|
||||
Uint32 sharpen_api_version(void) { return(TP_MAGIC_API_VERSION); }
|
||||
|
||||
|
||||
// No setup required:
|
||||
int sharpen_init(magic_api * api){
|
||||
|
||||
int i;
|
||||
char fname[1024];
|
||||
|
||||
for (i = 0; i < sharpen_NUM_TOOLS; i++){
|
||||
snprintf(fname, sizeof(fname), "%s/sounds/magic/%s", api->data_directory, sharpen_snd_filenames[i]);
|
||||
sharpen_snd_effect[i] = Mix_LoadWAV(fname);
|
||||
}
|
||||
return(1);
|
||||
}
|
||||
|
||||
// We have multiple tools:
|
||||
int sharpen_get_tool_count(magic_api * api)
|
||||
{
|
||||
return(sharpen_NUM_TOOLS);
|
||||
}
|
||||
|
||||
// Load our icons:
|
||||
SDL_Surface * sharpen_get_icon(magic_api * api, int which){
|
||||
char fname[1024];
|
||||
snprintf(fname, sizeof(fname), "%simages/magic/%s", api->data_directory, sharpen_icon_filenames[which]);
|
||||
return(IMG_Load(fname));
|
||||
}
|
||||
|
||||
// Return our names, localized:
|
||||
char * sharpen_get_name(magic_api * api, int which){
|
||||
return(strdup(gettext(sharpen_names[which])));
|
||||
}
|
||||
|
||||
// Return our descriptions, localized:
|
||||
char * sharpen_get_description(magic_api * api, int which){
|
||||
return(strdup(gettext(sharpen_descs[which])));
|
||||
}
|
||||
|
||||
//Calculates the grey scale value for a rgb pixel
|
||||
static int sharpen_grey(Uint8 r1,Uint8 g1,Uint8 b1){
|
||||
return 0.3*r1+.59*g1+0.11*b1;
|
||||
}
|
||||
|
||||
// Do the effect:
|
||||
static void do_sharpen(void * ptr,SDL_Surface * canvas, SDL_Surface * last, int which)
|
||||
{
|
||||
magic_api * api = (magic_api *) ptr;
|
||||
sharpen_temp = (double*)malloc(api->canvas_w*api->canvas_h*sizeof(double));
|
||||
int x, y;
|
||||
int grey;
|
||||
Uint8 r1, g1, b1;
|
||||
|
||||
//For sobel calculation
|
||||
int i,j;
|
||||
int sobel_1,sobel_2;
|
||||
|
||||
//For normalisation
|
||||
double min=INT_MAX;
|
||||
double max=0;
|
||||
|
||||
|
||||
//Sobel weighting masks
|
||||
const int sobel_weights_1[3][3] = { {1,2,1},
|
||||
{0,0,0},
|
||||
{-1,-2,-1}};
|
||||
const int sobel_weights_2[3][3] = { {-1,0,1},
|
||||
{-2,0,2},
|
||||
{-1,0,1}};
|
||||
|
||||
for (y = 0; y < canvas->h; y++){
|
||||
for (x=0; x < canvas->w; x++){
|
||||
//Calculate Sobel edge values
|
||||
|
||||
sobel_1=0;
|
||||
sobel_2=0;
|
||||
for (i=-1;i<2;i++){
|
||||
for(j=-1; j<2; j++){
|
||||
//No need to check if inside canvas, getpixel does it for us.
|
||||
SDL_GetRGB(api->getpixel(last, x+i, y+j), last->format, &r1, &g1, &b1);
|
||||
grey = sharpen_grey(r1,g1,b1);
|
||||
sobel_1 += grey * sobel_weights_1[i+1][j+1];
|
||||
sobel_2 += grey * sobel_weights_2[i+1][j+1];
|
||||
}
|
||||
}
|
||||
|
||||
//And store in temp variable
|
||||
//Cant just write to surface as they may not be 0-255 and surface will clamp them and lose data
|
||||
sharpen_temp[x*(canvas->h-1) + y] = sqrt(sobel_1*sobel_1 + sobel_2*sobel_2);
|
||||
|
||||
//Calculate normalisation
|
||||
if (sharpen_temp[x*(canvas->h-1) + y]<min){
|
||||
min=sharpen_temp[x*(canvas->h-1) + y];
|
||||
}
|
||||
if(sharpen_temp[x*(canvas->h-1) + y]>max){
|
||||
max=sharpen_temp[x*(canvas->h-1) + y];
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (y = 0; y < canvas->h; y++){
|
||||
for (x=0; x < canvas->w; x++){
|
||||
|
||||
//apply normalisation
|
||||
sharpen_temp[x*(canvas->h-1) + y]= ((sharpen_temp[x*(canvas->h-1) + y]-min)/(max-min))*255.0;
|
||||
|
||||
// set image to white where edge value is below THRESHOLD
|
||||
if (which == TOOL_TRACE){
|
||||
if (sharpen_temp[x*(canvas->h-1) + y]<THRESHOLD)
|
||||
{
|
||||
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, 255, 255, 255));
|
||||
}
|
||||
|
||||
}
|
||||
//Simply display the edge values - provides a nice black and white silhouette image
|
||||
else if (which == TOOL_SILHOUETTE){
|
||||
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, sharpen_temp[x*(canvas->h-1) + y],
|
||||
sharpen_temp[x*(canvas->h-1) + y],
|
||||
sharpen_temp[x*(canvas->h-1) + y]));
|
||||
}
|
||||
//Add the edge values to the original image, creating a more distinct jump in contrast at edges
|
||||
else if(which == TOOL_SHARPEN){
|
||||
SDL_GetRGB(api->getpixel(last, x, y), last->format, &r1, &g1, &b1);
|
||||
api->putpixel(canvas, x, y, SDL_MapRGB(canvas->format, clamp(0.0, r1 + SHARPEN * sharpen_temp[x*(canvas->h-1) + y], 255.0),
|
||||
clamp(0.0, g1 + SHARPEN * sharpen_temp[x*(canvas->h-1) + y], 255.0),
|
||||
clamp(0.0, b1 + SHARPEN * sharpen_temp[x*(canvas->h-1) + y], 255.0)));
|
||||
}
|
||||
}
|
||||
}
|
||||
//Clean up temp variable
|
||||
if (sharpen_temp != NULL){
|
||||
free(sharpen_temp);
|
||||
}
|
||||
}
|
||||
|
||||
// Affect the canvas on drag:
|
||||
void sharpen_drag(magic_api * api, int which, SDL_Surface * canvas,
|
||||
SDL_Surface * last, int ox, int oy, int x, int y,
|
||||
SDL_Rect * update_rect)
|
||||
{
|
||||
// No-op
|
||||
}
|
||||
|
||||
// Affect the canvas on click:
|
||||
void sharpen_click(magic_api * api, int which,
|
||||
SDL_Surface * canvas, SDL_Surface * last,
|
||||
int x, int y, SDL_Rect * update_rect)
|
||||
{
|
||||
update_rect->x = 0;
|
||||
update_rect->y = 0;
|
||||
update_rect->w = canvas->w;
|
||||
update_rect->h = canvas->h;
|
||||
do_sharpen(api, canvas, last, which);
|
||||
//play sound
|
||||
api->playsound(sharpen_snd_effect[which], 128, 255);
|
||||
}
|
||||
|
||||
// Affect the canvas on release:
|
||||
void sharpen_release(magic_api * api, int which,
|
||||
SDL_Surface * canvas, SDL_Surface * last,
|
||||
int x, int y, SDL_Rect * update_rect)
|
||||
{
|
||||
}
|
||||
|
||||
// No setup happened:
|
||||
void sharpen_shutdown(magic_api * api)
|
||||
{
|
||||
//Clean up sounds
|
||||
int i;
|
||||
for(i=0; i<sharpen_NUM_TOOLS; i++){
|
||||
if(sharpen_snd_effect[i] != NULL){
|
||||
Mix_FreeChunk(sharpen_snd_effect[i]);
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Record the color from Tux Paint:
|
||||
void sharpen_set_color(magic_api * api, Uint8 r, Uint8 g, Uint8 b)
|
||||
{
|
||||
}
|
||||
|
||||
// Use colors:
|
||||
int sharpen_requires_colors(magic_api * api, int which)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue