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Working sobel & working image highlight
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Marcelo Politzer Couto committed Sep 3, 2011
1 parent 02fae53 commit 9e26677
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Showing 4 changed files with 109 additions and 66 deletions.
2 changes: 1 addition & 1 deletion Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -5,7 +5,7 @@ OUT=tmp
CC=gcc
RM=rm
MV=mv
CFLAGS=-O2 -Wshadow -Wall `pkg-config gl --cflags` -I /usr/include/iup
CFLAGS=-O2 -Wshadow -Wall `pkg-config gl --cflags` -I /usr/include/iup -ggdb
LIBS=-l iup -l iupgl -l iupimglib

MAKEFILE=Makefile
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2 changes: 1 addition & 1 deletion image.h
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Expand Up @@ -210,7 +210,7 @@ int imgWriteTGA(char *filename, Image* image);
*
* @return retorna 1 caso nao haja erros.
*/
imgWriteBMP(char *filename, Image* bmp);
int imgWriteBMP(char *filename, Image* bmp);

/**
* Le a imagem a partir do arquivo especificado.
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Binary file added papai_noel.bmp
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171 changes: 107 additions & 64 deletions t0.c
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Original file line number Diff line number Diff line change
Expand Up @@ -27,6 +27,7 @@
#include <stdlib.h>
#include <iup.h> /* IUP functions*/
#include <iupgl.h> /* IUP functions related to OpenGL (IupGLCanvasOpen,IupGLMakeCurrent and IupGLSwapBuffers) */
#include "image.h"

#ifdef WIN32
#include <windows.h> /* includes only in MSWindows not in UNIX */
Expand All @@ -38,10 +39,69 @@
#endif

/*- Program context: -------------------------------------------------*/
Ihandle *canvas; /* canvas handle */
Ihandle *msgbar; /* message bar handle */
int width=640,height=480; /* width and height of the canvas */
float blue=0.3f; /* current blue level */
static Image* cur_img;
static Image* old_img;
static Image* sobel_img;
static Image* high_img;

static int img_idx;
static Ihandle *canvas; /* canvas handle */
static Ihandle *msgbar; /* message bar handle */
static int width=640,height=480; /* width and height of the canvas */

#define ARRAY_SZ(x) sizeof(x)/sizeof(*x)
Image *do_highlight(Image *orig, Image *sobel, float threshold)
{
int x,y;
float ro,go,bo;
float rs,gs,bs;
Image *high;
high = imgCopy(orig);

for(y=0; y<imgGetHeight(orig); y++){
for(x=0; x<imgGetWidth(orig); x++){
imgGetPixel3f(orig, x, y, &ro, &go, &bo);
imgGetPixel3f(sobel, x, y, &rs, &gs, &bs);

rs = ro - threshold*rs;
gs = go - threshold*gs;
bs = bo - threshold*bs;
imgSetPixel3f(high, x, y, rs, gs, bs);
}
}

return high;
}

char * get_file_name( void )
{
Ihandle* getfile = IupFileDlg();
char* filename = NULL;

IupSetAttribute(getfile, IUP_TITLE, "Abertura de arquivo" );
IupSetAttribute(getfile, IUP_DIALOGTYPE, IUP_OPEN);
IupSetAttribute(getfile, IUP_FILTER, "*.bmp");
IupSetAttribute(getfile, IUP_FILTERINFO, "Arquivo de imagem (*.bmp)");
IupPopup(getfile, IUP_CENTER, IUP_CENTER);

filename = IupGetAttribute(getfile, IUP_VALUE);
return filename;
}

char* get_new_file_name( void )
{
Ihandle* getfile = IupFileDlg();
char* filename = NULL;

IupSetAttribute(getfile, IUP_TITLE, "Salva arquivo" );
IupSetAttribute(getfile, IUP_DIALOGTYPE, IUP_SAVE);
IupSetAttribute(getfile, IUP_FILTER, "*.bmp");
IupSetAttribute(getfile, IUP_FILTERINFO, "Arquivo de imagem (*.bmp)");
IupPopup(getfile, IUP_CENTER, IUP_CENTER);

filename = IupGetAttribute(getfile, IUP_VALUE);
return filename;
}

/*------------------------------------------*/
/* IUP Callbacks */
Expand All @@ -56,12 +116,14 @@ int repaint_cb(Ihandle *self)
glClear(GL_COLOR_BUFFER_BIT); /* clear the color buffer */

/* assing to each pixel of the canvas a red-green color in a given blue value (global variable) */
if (!cur_img) return IUP_DEFAULT;

glBegin(GL_POINTS);
for (y=0;y<height;y++) {
for (x=0; x<width; x++) {
float red = ((float)x)/width;
float green = ((float)y)/height;
glColor3f(red,green,blue); /* define a current color */
for (y=0; y < imgGetHeight(cur_img); y++) {
for (x=0; x < imgGetWidth(cur_img); x++) {
float r,g,b;
imgGetPixel3f(cur_img, x, y, &r, &g, &b);
glColor3f(r,g,b); /* define a current color */
glVertex2i(x,y); /* paint a point in the position (x,y,0) */
}
}
Expand Down Expand Up @@ -98,63 +160,54 @@ int resize_cb(Ihandle *self, int new_width, int new_height)
return IUP_DEFAULT; /* return to the IUP main loop */
}

int first_cb(void)
{
blue=0;
/* print the blue level in the msg bar */
IupSetfAttribute(msgbar, "TITLE", "Red [0,1] x Green [0,1] with Blue: %3.2f",blue);
repaint_cb(canvas); /* repaint with new values of blue */
return IUP_DEFAULT;
}

int previous_cb(void)
int open_file_cb(void)
{
blue-=0.1f;
if (blue<0.0f) blue=0.0f;
/* print the blue level in the msg bar */
IupSetfAttribute(msgbar, "TITLE", "Red [0,1] x Green [0,1] with Blue: %3.2f",blue);
char *fname = get_file_name();
if (!fname) /*TODO show dialog de erro. */
printf ("invalid file name: %s\n", fname);
old_img = imgReadBMP(fname);
// sobel_img = cur_img = do_sobel(old_img);
sobel_img = cur_img = imgEdges(old_img);
high_img = do_highlight(old_img, sobel_img, 0.1);
resize_cb(canvas, imgGetWidth(cur_img), imgGetHeight(cur_img));
repaint_cb(canvas); /* repaint with new values of blue */
return IUP_DEFAULT;
}

int next_cb(void)
int toggle_cb(Ihandle *ih, int state)
{
blue+=0.1f;
if (blue>1.0f) blue=1.0f;
/* print the blue level in the msg bar */
IupSetfAttribute(msgbar, "TITLE", "Red [0,1] x Green [0,1] with Blue: %3.2f",blue);
repaint_cb(canvas); /* repaint with new values of blue */
return IUP_DEFAULT;
}
if (cur_img == high_img) cur_img = sobel_img;
else cur_img = high_img;

int last_cb(void)
{
blue=1;
/* print the blue level in the msg bar */
IupSetfAttribute(msgbar, "TITLE", "Red [0,1] x Green [0,1] with Blue: %3.2f",blue);
repaint_cb(canvas); /* repaint with new values of blue */
printf ("%p\n", cur_img);
repaint_cb(canvas);
return IUP_DEFAULT;
}

int motion_cb(Ihandle *self, int xm, int ym, char *status){
int x=xm;
int y=height-ym;
IupSetfAttribute(msgbar, "TITLE", "Motion: x = %d, y=%d and status=%s",x,y,status);
IupSetfAttribute(msgbar, "TITLE", "Motion: x = %d, y=%d - %s",x,y,
cur_img == sobel_img ? "old" : "cur");
return IUP_DEFAULT;
}

int button_cb(Ihandle* self, int button, int pressed, int xm, int ym, char* status){
int x=xm;
int y=height-ym;
IupSetfAttribute(msgbar, "TITLE", "Button: pressed=%d, x=%d, y=%d and status=%s",pressed,x,y,status);
IupSetfAttribute(msgbar, "TITLE", "pressed=%d, x=%d, y=%d, status=%s",
pressed, x, y, status);
return IUP_DEFAULT;
}


int exit_cb(void)
{
printf("Function to free memory and do finalizations...\n");
imgDestroy(sobel_img);
imgDestroy(old_img);

old_img = sobel_img = cur_img = NULL;
return IUP_CLOSE;
}

Expand All @@ -168,30 +221,20 @@ Ihandle* InitToolbar(void)
Ihandle* toolbar;

/* Create four buttons */
Ihandle* first = IupButton("first", "first_action");
Ihandle* previous = IupButton("previous", "previous_action");
Ihandle* next = IupButton("next", "next_action");
Ihandle* last = IupButton("last", "last_action");
Ihandle* open_file = IupButton("open", "open_file_action");
Ihandle* toggle_img = IupButton("toggle", "toggle_img_action");

/* Associate images with this buttons */
IupSetAttribute(first,"IMAGE","IUP_MediaGotoBegin");
IupSetAttribute(previous,"IMAGE","IUP_MediaReverse");
IupSetAttribute(next,"IMAGE","IUP_MediaPlay");
IupSetAttribute(last,"IMAGE","IUP_MediaGoToEnd");
IupSetAttribute(open_file,"IMAGE","IUP_FileOpen");

/* Associate tip's (text that appear when the mouse is over) */
IupSetAttribute(first,"TIP","go to first");
IupSetAttribute(previous,"TIP","previous");
IupSetAttribute(next,"TIP","next");
IupSetAttribute(last,"TIP","go to last");
IupSetAttribute(open_file,"TIP","go to open_file");

/* Associate function callbacks to the button actions */
IupSetFunction("first_action", (Icallback)first_cb);
IupSetFunction("previous_action", (Icallback)previous_cb);
IupSetFunction("next_action", (Icallback)next_cb);
IupSetFunction("last_action", (Icallback)last_cb);
IupSetFunction("open_file_action", (Icallback)open_file_cb);
IupSetFunction("toggle_img_action", (Icallback)toggle_cb);

toolbar=IupHbox(first,previous,next,last, IupFill(),NULL);
toolbar=IupHbox(open_file, toggle_img, IupFill(),NULL);

return toolbar;
}
Expand Down Expand Up @@ -239,14 +282,14 @@ Ihandle* InitDialog(void)
int main(int argc, char* argv[])
{
Ihandle* dialog;
IupOpen(&argc, &argv); /* opens the IUP lib */
IupImageLibOpen(); /* enable iup_image manipulation (for buttons) */
IupGLCanvasOpen(); /* enable the use of OpenGL to draw in canvas */

dialog = InitDialog(); /* local function to create a dialog with buttons and canvas */
IupShowXY(dialog, IUP_CENTER, IUP_CENTER); /* shows dialog in the center of screen */
IupOpen(&argc, &argv);
IupImageLibOpen();
IupGLCanvasOpen();

IupMainLoop(); /* handle the program control to the IUP lib until a return IUP_CLOSE */
dialog = InitDialog();
IupShowXY(dialog, IUP_CENTER, IUP_CENTER);

IupClose(); /* closes the IUP lib */
IupMainLoop();
IupClose();
return 0;
}

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