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Almost ready image view OpenGL module

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This commit is contained in:
Eddy 2015-03-01 14:37:23 +03:00
parent bf7a247678
commit 4e5d015e53
14 changed files with 806 additions and 335 deletions
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60
Bresenham_circle.c Normal file
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@ -0,0 +1,60 @@
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
char *drawCircle(int R, int geom){
if(R > 200 || R < 1) return NULL;
int S, i, Y = 2 * R + 2;
if(geom)
S = Y * (R + 1);
else
S = Y * (Y - 1);
char *buf = malloc(S+1);
if(!buf) return NULL;
memset(buf, ' ', S);
buf[S] = 0;
for(i = Y-1; i < S; i+=Y) buf[i] = '\n';
inline void DrawPixel(int x, int y){
if(geom){
if(y%2==0) buf[Y * y/2 + x] = '*';
}else{
buf[Y * y + x] = '*';
}
}
// Bresenham's circle algorithm
int x = R;
int y = 0;
int radiusError = 1-x;
while(x >= y){
DrawPixel(x + R, y + R);
DrawPixel(y + R, x + R);
DrawPixel(-x + R, y + R);
DrawPixel(-y + R, x + R);
DrawPixel(-x + R, -y + R);
DrawPixel(-y + R, -x + R);
DrawPixel(x + R, -y + R);
DrawPixel(y + R, -x + R);
y++;
if (radiusError < 0){
radiusError += 2 * y + 1;
}else{
x--;
radiusError += 2 * (y - x) + 1;
}
}
return buf;
}
int main(int argc, char **argv){
int i, R;
char *buf;
for(i = 1; i < argc; i++){
if(!(buf = drawCircle(R = atoi(argv[i]), 1))){
printf("Wrong parameter %s\n", argv[i]);
continue;
}
printf("\nCircle with R = %d:\n%s\n", R, buf);
free(buf); buf = NULL;
}
return 0;
}

189
image_view_module/bmpview.c
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@ -1,189 +0,0 @@
// bmpview.c
//
// Copyright 2010 Edward V. Emelianoff <eddy@sao.ru>
//
// 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., 51 Franklin Street, Fifth Floor, Boston,
// MA 02110-1301, USA.
//-lglut
#include "bmpview.h"
#include "macros.h"
#include <pthread.h>
int totWindows = 0; // total number of opened windows
/*
void *GLloop(){
FNAME();
glutMainLoop();
return NULL;
}*/
/**
* create window & run main loop
*/
void createWindow(windowData *win){
FNAME();
if(!win) return;
int w = win->w, h = win->h;
/*
char *argv[] = {PROJNAME, NULL};
int argc = 1;
glutInit(&argc, argv);
*/
glGenTextures(1, &(win->Tex));
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(w, h);
win->GL_ID = glutCreateWindow(win->title);
DBG("created GL_ID=%d", win->GL_ID);
glutIdleFunc(Redraw);
glutReshapeFunc(Resize);
glutDisplayFunc(RedrawWindow);
glutKeyboardFunc(keyPressed);
glutSpecialFunc(keySpPressed);
glutMouseFunc(mousePressed);
glutMotionFunc(mouseMove);
win->z = 0.;
createMenu(win->ID);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, win->Tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, win->rawdata);
glDisable(GL_TEXTURE_2D);
totWindows++;
}
/*
void showid(int id){
printf("ID: %d\n", id);
}
*/
/**
* destroy window with OpenGL or inner identificator "window"
* @param window inner or OpenGL id
* @param idtype = INNER or OPENGL
* @return 1 in case of OK, 0 if fault
*/
int destroyWindow(int window, winIdType type){
windowData *win;
int canceled = 1;
if(type == OPENGL)
win = searchWindow_byGLID(window);
else
win = searchWindow(window);
if(!win) return 0;
//forEachWindow(showid);
pthread_mutex_lock(&win->mutex);
if(!pthread_cancel(win->thread)){ // cancel thread changing data
canceled = 0;
}
pthread_join(win->thread, NULL);
glDeleteTextures(1, &win->Tex);
glFinish();
glutDestroyWindow(win->GL_ID);
win->GL_ID = 0; // reset for forEachWindow()
pthread_mutex_unlock(&win->mutex);
if(!canceled && !pthread_cancel(win->thread)){ // cancel thread changing data
WARN(_("can't cancel a thread!"));
}
pthread_join(win->thread, NULL);
if(!removeWindow(win->ID)) WARNX(_("Error removing from list"));
totWindows--;
//forEachWindow(showid);
return 1;
}
void renderBitmapString(float x, float y, void *font, char *string, GLubyte *color){
char *c;
int x1=x, W=0;
for(c = string; *c; c++){
W += glutBitmapWidth(font,*c);// + 1;
}
x1 -= W/2;
glColor3ubv(color);
glLoadIdentity();
glTranslatef(0.,0., -150);
//glTranslatef(x,y, -4000.);
for (c = string; *c != '\0'; c++){
glColor3ubv(color);
glRasterPos2f(x1,y);
glutBitmapCharacter(font, *c);
//glutStrokeCharacter(GLUT_STROKE_ROMAN, *c);
x1 = x1 + glutBitmapWidth(font,*c);// + 1;
}
}
void redisplay(int GL_ID){
glutSetWindow(GL_ID);
glutPostRedisplay();
}
void Redraw(){
forEachWindow(redisplay);
usleep(10000);
}
void RedrawWindow(){
int window;
window = glutGetWindow();
windowData *win = searchWindow_byGLID(window);
if(!win) return;
if(pthread_mutex_trylock(&win->mutex) != 0) return;
/* Clear the windwindowDataow to black */
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
glTranslatef(-win->w/2.,-win->h/2., win->z);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, win->Tex);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, win->w, win->h, GL_RGB, GL_UNSIGNED_BYTE, win->rawdata);
glBegin(GL_QUADS);
glTexCoord2f(0., 1.); glVertex3f(0., 0., 0.);
glTexCoord2f(0., 0.); glVertex3f(0., win->h, 0.);
glTexCoord2f(1., 0.); glVertex3f(win->w, win->h, 0.);
glTexCoord2f(1., 1.); glVertex3f(win->w, 0., 0.);
glEnd();
glDisable(GL_TEXTURE_2D);
glFinish();
glutSwapBuffers();
pthread_mutex_unlock(&win->mutex);
}
void Resize(int width, int height){
FNAME();
int window = glutGetWindow();
windowData *win = searchWindow_byGLID(window);
if(!win) return;
int GRAB_WIDTH = win->w, GRAB_HEIGHT = win->h;
float _U_ tmp, wd = (float) width/GRAB_WIDTH, ht = (float)height/GRAB_HEIGHT;
tmp = (wd + ht) / 2.;
width = (int)(tmp * GRAB_WIDTH); height = (int)(tmp * GRAB_HEIGHT);
glutReshapeWindow(width, height);
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
GLfloat W = (GLfloat)GRAB_WIDTH; GLfloat H = (GLfloat)GRAB_HEIGHT;
//glOrtho(-W,W, -H,H, -1., 1.);
gluPerspective(90., W/H, 0., 100.0);
gluLookAt(0., 0., H/2., 0., 0., 0., 0., 1., 0.);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}

77
image_view_module/events.c
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@ -19,7 +19,7 @@
* MA 02110-1301, USA. * MA 02110-1301, USA.
*/ */
#include "events.h" #include "events.h"
#include "bmpview.h" #include "imageview.h"
#include "macros.h" #include "macros.h"
/* /*
* æÕÎËÃÉÉ ÄÌÑ ÒÁÂÏÔÙ Ó OpenGL'ÎÙÍÉ ÓÏÂÙÔÉÑÍÉ * æÕÎËÃÉÉ ÄÌÑ ÒÁÂÏÔÙ Ó OpenGL'ÎÙÍÉ ÓÏÂÙÔÉÑÍÉ
@ -35,21 +35,29 @@ void keyPressed(unsigned char key, //
//DBG("Key pressed. mod=%d, keycode=%d, point=(%d,%d)\n", mod, key, x,y); //DBG("Key pressed. mod=%d, keycode=%d, point=(%d,%d)\n", mod, key, x,y);
if((mod == GLUT_ACTIVE_CTRL) && (key == 'q' || key == 17)) exit(0); // ctrl + q if((mod == GLUT_ACTIVE_CTRL) && (key == 'q' || key == 17)) exit(0); // ctrl + q
switch(key){ switch(key){
case '1': // return zoom to 1 & image to 0
win->zoom = 1;
win->x = 0; win->y = 0;
break;
// case 'i': more_info = !more_info; // case 'i': more_info = !more_info;
// break; // break;
case 27: destroyWindow(window, OPENGL); case 27: destroyWindow(window, OPENGL);
break; break;
case 'p': case 'p':
printf("z = %f\n", win->z); printf("zoom = %f\n", win->zoom);
break; break;
// case 'm': createWindow(&mainWindow); // case 'm': createWindow(&mainWindow);
// break; // break;
// case 'w': createWindow(&WaveWindow); // case 'w': createWindow(&WaveWindow);
// break; // break;
case 'Z': win->z += 1.0; case 'Z':
break; win->zoom *= 1.1;
case 'z': win->z -= 1.0; calc_win_props(win, NULL, NULL);
break; break;
case 'z':
win->zoom /= 1.1;
calc_win_props(win, NULL, NULL);
break;
// case 'h': createWindow(&SubWindow); // case 'h': createWindow(&SubWindow);
// break; // break;
} }
@ -60,10 +68,28 @@ void keySpPressed(_U_ int key, _U_ int x, _U_ int y){
DBG("Sp. key pressed. mod=%d, keycode=%d, point=(%d,%d)\n", glutGetModifiers(), key, x,y); DBG("Sp. key pressed. mod=%d, keycode=%d, point=(%d,%d)\n", glutGetModifiers(), key, x,y);
} }
void mousePressed(int _U_ key, int _U_ state, _U_ int x, _U_ int y){ int oldx, oldy; // coordinates when mouse was pressed
// GLUT_LEFT_BUTTON, GLUT_MIDDLE_BUTTON, GLUT_RIGHT_BUTTON int movingwin = 0; // ==1 when user moves image by middle button
DBG("Mouse button %s. point=(%d, %d); mod=%d, button=%d\n", void mousePressed(_U_ int key, _U_ int state, _U_ int x, _U_ int y){
(state == GLUT_DOWN)? "pressed":"released", x, y, glutGetModifiers(), key); // key: GLUT_LEFT_BUTTON, GLUT_MIDDLE_BUTTON, GLUT_RIGHT_BUTTON
// state: GLUT_UP, GLUT_DOWN
int window = glutGetWindow();
windowData *win = searchWindow_byGLID(window);
if(!win) return;
if(state == GLUT_DOWN){
oldx = x; oldy = y;
float X,Y;
conv_mouse_to_image_coords(x,y,&X,&Y,win);
DBG("press in (%d, %d) == (%f, %f) on image", x,y,X,Y);
if(key == GLUT_MIDDLE_BUTTON) movingwin = 1;
if(key == 3){ // wheel UP
}else if(key == 4){ // wheel DOWN
}
}else{
movingwin = 0;
}
/* DBG("Mouse button %s. point=(%d, %d); mod=%d, button=%d\n",
(state == GLUT_DOWN)? "pressed":"released", x, y, glutGetModifiers(), key);*/
/* int window = glutGetWindow(); /* int window = glutGetWindow();
if(window == WaveWindow){ // ÝÅÌËÎÕÌÉ × ÏËÎÅ Ó ×ÅÊ×ÌÅÔÏÍ if(window == WaveWindow){ // ÝÅÌËÎÕÌÉ × ÏËÎÅ Ó ×ÅÊ×ÌÅÔÏÍ
@ -76,9 +102,36 @@ void mousePressed(int _U_ key, int _U_ state, _U_ int x, _U_ int y){
} }
*/ */
} }
/* this doesn't work
void mouseWheel(int button, int dir, int x, int y){
int window = glutGetWindow();
windowData *win = searchWindow_byGLID(window);
if(!win) return;
DBG("Mouse wheel, dir: %d. point=(%d, %d); mod=%d, button=%d\n",
dir, x, y, glutGetModifiers(), button);
}
*/
void mouseMove(_U_ int x, _U_ int y){ void mouseMove(_U_ int x, _U_ int y){
DBG("Mouse moved to (%d, %d)\n", x, y); int window = glutGetWindow();
windowData *win = searchWindow_byGLID(window);
if(!win) return;
//DBG("Mouse moved to (%d, %d)\n", x, y);
if(movingwin){
float X, Y, nx, ny, w2, h2;
float a = win->Daspect;
X = (x - oldx) * a; Y = (y - oldy) * a;
nx = win->x + X;
ny = win->y - Y;
w2 = win->image->w / 2. * win->zoom;
h2 = win->image->h / 2. * win->zoom;
if(nx < w2 && nx > -w2)
win->x = nx;
if(ny < h2 && ny > -h2)
win->y = ny;
oldx = x;
oldy = y;
calc_win_props(win, NULL, NULL);
}
} }
/** /**

3
image_view_module/events.h
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@ -27,6 +27,7 @@
#include <stdio.h> #include <stdio.h>
#include <GL/glut.h> #include <GL/glut.h>
#include <GL/glext.h> #include <GL/glext.h>
#include <GL/freeglut.h>
extern float Z; // ËÏÏÒÄÉÎÁÔÁ Z (zoom) extern float Z; // ËÏÏÒÄÉÎÁÔÁ Z (zoom)
@ -36,6 +37,6 @@ void mousePressed(int key, int state, int x, int y);
void mouseMove(int x, int y); void mouseMove(int x, int y);
void createMenu(int window); void createMenu(int window);
void menuEvents(int opt); void menuEvents(int opt);
//void mouseWheel(int button, int dir, int x, int y);
#endif // __EVENTS_H__ #endif // __EVENTS_H__

398
image_view_module/imageview.c Normal file
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@ -0,0 +1,398 @@
// bmpview.c
//
// Copyright 2010 Edward V. Emelianoff <eddy@sao.ru>
//
// 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., 51 Franklin Street, Fifth Floor, Boston,
// MA 02110-1301, USA.
//-lglut
#include "imageview.h"
#include "macros.h"
#include <pthread.h>
#include <X11/Xlib.h> // XInitThreads();
int totWindows = 0; // total number of opened windows
pthread_t GLUTthread; // main GLUT thread
pthread_mutex_t winini_mutex = PTHREAD_MUTEX_INITIALIZER; // mutex for windows initialization
volatile int wannacreate = 0; // flag: ==1 if someone wants to create window
windowData *wininiptr = NULL;
int initialized = 0; // ==1 if GLUT is initialized; ==0 after clear_GL_context
void createWindow(windowData *win);
void RedrawWindow();
void Resize(int width, int height);
/**
* calculate window properties on creating & resizing
*/
void calc_win_props(windowData *win, GLfloat *Wortho, GLfloat *Hortho){
if(!win || ! win->image) return;
double a, A, w, h, W, H;
double Zoom = win->zoom;
w = (double)win->image->w / 2.;
h = (double)win->image->h / 2.;
W = (double)win->w;
H = (double)win->h;
A = W / H;
a = w / h;
if(A > a){ // now W & H are parameters for glOrtho
win->Daspect = h / H * 2.;
W = h * A; H = h;
}else{
win->Daspect = w / W * 2.;
H = w / A; W = w;
}
if(Wortho) *Wortho = W;
if(Hortho) *Hortho = H;
// calculate coordinates of center
win->x0 = W/Zoom - w + win->x / Zoom;
win->y0 = H / Zoom + h - win->y / Zoom;
}
/**
* create window & run main loop
*/
void createWindow(windowData *win){
FNAME();
if(!initialized) return;
if(!win) return;
int w = win->w, h = win->h;
DBG("create window with title %s", win->title);
glutInitDisplayMode(GLUT_RGB | GLUT_DOUBLE | GLUT_DEPTH);
glutInitWindowSize(w, h);
win->GL_ID = glutCreateWindow(win->title);
DBG("created GL_ID=%d", win->GL_ID);
glutReshapeFunc(Resize);
glutDisplayFunc(RedrawWindow);
glutKeyboardFunc(keyPressed);
glutSpecialFunc(keySpPressed);
//glutMouseWheelFunc(mouseWheel);
glutMouseFunc(mousePressed);
glutMotionFunc(mouseMove);
//glutIdleFunc(glutPostRedisplay);
glutIdleFunc(NULL);
DBG("init textures");
glGenTextures(1, &(win->Tex));
calc_win_props(win, NULL, NULL);
win->zoom = 1. / win->Daspect;
// createMenu(win->ID);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, win->Tex);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
//glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, w, h, 0, GL_RGB, GL_UNSIGNED_BYTE, NULL);
glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB, win->image->w, win->image->h, 0,
GL_RGB, GL_UNSIGNED_BYTE, win->image->rawdata);
glDisable(GL_TEXTURE_2D);
totWindows++;
DBG("OK, total opened windows: %d", totWindows);
}
int killwindow(int GL_ID){
DBG("try to kill win GL_ID=%d", GL_ID);
windowData *win;
int canceled = 1;
win = searchWindow_byGLID(GL_ID);
if(!win) return 0;
if(!pthread_cancel(win->thread)){ // cancel thread changing data
canceled = 0;
}
// pthread_join(win->thread, NULL);
glDeleteTextures(1, &win->Tex);
glFinish();
glutDestroyWindow(win->GL_ID);
win->GL_ID = 0; // reset for forEachWindow()
pthread_mutex_unlock(&win->mutex);
if(!canceled && !pthread_cancel(win->thread)){ // cancel thread changing data
WARN(_("can't cancel a thread!"));
}
pthread_join(win->thread, NULL);
if(!removeWindow(win->ID)) WARNX(_("Error removing from list"));
totWindows--;
return 1;
}
/**
* destroy window with OpenGL or inner identificator "window"
* @param window inner or OpenGL id
* @param idtype = INNER or OPENGL
* @return 1 in case of OK, 0 if fault
*/
int destroyWindow(int window, winIdType type){
if(!initialized) return 0;
int r = 0;
pthread_mutex_lock(&winini_mutex);
if(type == INNER){
windowData *win = searchWindow(window);
if(win) r = killwindow(win->GL_ID);
}else
r = killwindow(window);
pthread_mutex_unlock(&winini_mutex);
return r;
}
void renderBitmapString(float x, float y, void *font, char *string, GLubyte *color){
if(!initialized) return;
char *c;
int x1=x, W=0;
for(c = string; *c; c++){
W += glutBitmapWidth(font,*c);// + 1;
}
x1 -= W/2;
glColor3ubv(color);
glLoadIdentity();
glTranslatef(0.,0., -150);
//glTranslatef(x,y, -4000.);
for (c = string; *c != '\0'; c++){
glColor3ubv(color);
glRasterPos2f(x1,y);
glutBitmapCharacter(font, *c);
//glutStrokeCharacter(GLUT_STROKE_ROMAN, *c);
x1 = x1 + glutBitmapWidth(font,*c);// + 1;
}
}
void redisplay(int GL_ID){
if(!initialized) return;
glutSetWindow(GL_ID);
glutPostRedisplay();
}
/*
if(redraw)
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h,
GL_LUMINANCE, GL_FLOAT, ptro); // s/image->data/tex/
else
glTexImage2D(GL_TEXTURE_2D, 0, GL_INTENSITY, w, h,
0, GL_LUMINANCE, GL_FLOAT, ptro);
//glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
//glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
*/
void RedrawWindow(){
if(!initialized) return;
int window;
window = glutGetWindow();
windowData *win = searchWindow_byGLID(window);
if(!win) return;
if(pthread_mutex_trylock(&win->mutex) != 0) return;
int w = win->image->w, h = win->image->h;
glClearColor(0.0, 0.0, 0.0, 1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
glLoadIdentity();
//glTranslatef(win->x-w/2., win->y-h/2., win->z);
glTranslatef(win->x, win->y, 0.);
glScalef(-win->zoom, -win->zoom, 1.);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D, win->Tex);
if(win->image->changed){
glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE);
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, w, h, GL_RGB, GL_UNSIGNED_BYTE, win->image->rawdata);
win->image->changed = 0;
}
/*
glBegin(GL_QUADS);
glTexCoord2f(0., 1.); glVertex3f(0., 0., 0.);
glTexCoord2f(0., 0.); glVertex3f(0.,h, 0.);
glTexCoord2f(1., 0.); glVertex3f(w, h, 0.);
glTexCoord2f(1., 1.); glVertex3f(w, 0., 0.);
glEnd();
*/
w /= 2.; h /= 2.;
glBegin(GL_QUADS);
glTexCoord2f(0.0f, 0.0f); glVertex2f(-w, -h );
glTexCoord2f(1.0f, 0.0f); glVertex2f( w, -h );
glTexCoord2f(1.0f, 1.0f); glVertex2f( w, h );
glTexCoord2f(0.0f, 1.0f); glVertex2f(-w, h );
glEnd();
glDisable(GL_TEXTURE_2D);
glFinish();
glutSwapBuffers();
pthread_mutex_unlock(&win->mutex);
}
/**
* main freeGLUT loop
* waits for global signals to create windows & make other actions
*/
void *Redraw(_U_ void *arg){
while(1){
pthread_mutex_lock(&winini_mutex);
if(!initialized) return NULL;
if(wannacreate){ // someone asks to create window
DBG("call for window creating, id: %d", wininiptr->ID);
createWindow(wininiptr);
DBG("done!");
wininiptr = NULL;
wannacreate = 0;
}
forEachWindow(redisplay);
pthread_mutex_unlock(&winini_mutex);
if(totWindows) glutMainLoopEvent(); // process actions if there are windows
usleep(10000);
}
return NULL;
}
void Resize(int width, int height){
if(!initialized) return;
int window = glutGetWindow();
windowData *win = searchWindow_byGLID(window);
if(!win) return;
/* int GRAB_WIDTH = win->w, GRAB_HEIGHT = win->h;
float _U_ tmp, wd = (float) width/GRAB_WIDTH, ht = (float)height/GRAB_HEIGHT;
tmp = (wd + ht) / 2.;
width = (int)(tmp * GRAB_WIDTH); height = (int)(tmp * GRAB_HEIGHT);*/
glutReshapeWindow(width, height);
win->w = width;
win->h = height;
glViewport(0, 0, width, height);
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
//GLfloat W = (GLfloat)GRAB_WIDTH; GLfloat H = (GLfloat)GRAB_HEIGHT;
GLfloat W, H;
calc_win_props(win, &W, &H);
glOrtho(-W,W, -H,H, -1., 1.);
// gluPerspective(90., W/H, 0., 100.0);
// gluLookAt(0., 0., H/2., 0., 0., 0., 0., 1., 0.);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
}
/**
* create new window, run thread & return pointer to its structure or NULL
* asynchroneous call from outside
* wait for window creating & return its data
* @param title - header (copyed inside this function)
* @param w,h - image size
* @param rawdata - NULL (then the memory will be allocated here with size w x h)
* or allocated outside data
*/
windowData *createGLwin(char *title, int w, int h, rawimage *rawdata){
FNAME();
if(!initialized) return NULL;
windowData *win = MALLOC(windowData, 1);
if(!addWindow(win)){
FREE(win);
return NULL;
}
rawimage *raw;
if(rawdata){
raw = rawdata;
}else{
raw = MALLOC(rawimage, 1);
if(raw){
raw->rawdata = MALLOC(GLubyte, w*h*3);
raw->w = w;
raw->h = h;
raw->changed = 1;
// raw->protected is zero automatically
}
}
if(!raw || !raw->rawdata){
free(raw);
return NULL;
}
win->title = strdup(title);
win->image = raw;
if(pthread_mutex_init(&win->mutex, NULL)){
WARN(_("Can't init mutex!"));
removeWindow(win->ID);
return NULL;
}
win->w = w;
win->h = h;
while(wannacreate); // wait if there was another creating
pthread_mutex_lock(&winini_mutex);
wininiptr = win;
wannacreate = 1;
pthread_mutex_unlock(&winini_mutex);
DBG("wait for creatin");
while(wannacreate); // wait until window created from main thread
DBG("window created");
return win;
}
/**
* Init freeGLUT
*/
void imageview_init(){
FNAME();
char *v[] = {PROJNAME, NULL};
int c = 1;
static int glutnotinited = 1;
if(initialized){
// "Уже инициализировано!"
WARNX(_("Already initialized!"));
return;
}
if(glutnotinited){
XInitThreads(); // we need it for threaded windows
glutInit(&c, v);
glutnotinited = 0;
}
glutSetOption(GLUT_ACTION_ON_WINDOW_CLOSE, GLUT_ACTION_CONTINUE_EXECUTION);
pthread_create(&GLUTthread, NULL, &Redraw, NULL);
initialized = 1;
}
void killwindow_v(int GL_ID){
DBG("GL_ID: %d", GL_ID);
killwindow(GL_ID);
}
/**
* Close all opened windows and terminate main GLUT thread
*/
void clear_GL_context(){
FNAME();
if(!initialized) return;
pthread_mutex_lock(&winini_mutex);
forEachWindow(killwindow_v);
pthread_cancel(GLUTthread); // kill main GLUT thread
pthread_join(GLUTthread, NULL);
initialized = 0;
pthread_mutex_unlock(&winini_mutex);
}
/*
* Coordinates transformation from CS of drawingArea into CS of picture
* x,y - pointer coordinates
* X,Y - coordinates of appropriate point at picture
*/
void conv_mouse_to_image_coords(int x, int y,
float *X, float *Y,
windowData *window){
float a = window->Daspect / window->zoom;
*X = x * a - window->x0;
*Y = window->y0 - y * a;
}
void conv_image_to_mouse_coords(float X, float Y,
int *x, int *y,
windowData *window){
float a = window->zoom / window->Daspect;
*x = (X + window->x0) * a;
*y = (window->y0 - Y) * a;
}

15
image_view_module/bmpview.h → image_view_module/imageview.h
View File

@ -1,5 +1,5 @@
/* /*
* bmpview.h * imageview.h
* *
* Copyright 2015 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com> * Copyright 2015 Edward V. Emelianov <eddy@sao.ru, edward.emelianoff@gmail.com>
* *
@ -33,11 +33,16 @@ typedef enum{
OPENGL OPENGL
} winIdType; } winIdType;
void createWindow(windowData *win); void imageview_init();
windowData *createGLwin(char *title, int w, int h, rawimage *rawdata);
//void window_redraw(windowData *win);
int destroyWindow(int window, winIdType type); int destroyWindow(int window, winIdType type);
void renderBitmapString(float x, float y, void *font, char *string, GLubyte *color); void renderBitmapString(float x, float y, void *font, char *string, GLubyte *color);
void Redraw(); void clear_GL_context();
void RedrawWindow();
void Resize(int width, int height); void calc_win_props(windowData *win, GLfloat *Wortho, GLfloat *Hortho);
void conv_mouse_to_image_coords(int x, int y, float *X, float *Y, windowData *window);
void conv_image_to_mouse_coords(float X, float Y, int *x, int *y, windowData *window);
#endif // __BMPVIEW_H__ #endif // __BMPVIEW_H__

8
image_view_module/list.c
View File

@ -119,7 +119,7 @@ windowData *searchWindow_byGLID(int GL_ID){
/** /**
* free() all data for node of list * free() all data for node of list
* !!! data for raw pixels (rawdata) doesn't removed as it should be used * !!! data for raw pixels (win->image) will be removed only if image->protected == 0
* only for initialisation and free() by user !!! * only for initialisation and free() by user !!!
*/ */
void WinList_freeNode(WinList **node){ void WinList_freeNode(WinList **node){
@ -128,7 +128,10 @@ void WinList_freeNode(WinList **node){
windowData *win = cur->data; windowData *win = cur->data;
if(root == cur) root = next; if(root == cur) root = next;
FREE(win->title); FREE(win->title);
FREE(win->rawdata); if(win->image->protected == 0){
FREE(win->image->rawdata);
FREE(win->image);
}
pthread_mutex_destroy(&win->mutex); pthread_mutex_destroy(&win->mutex);
FREE(*node); FREE(*node);
if(prev) if(prev)
@ -154,7 +157,6 @@ int removeWindow(int winID){
/** /**
* remove all nodes in list * remove all nodes in list
* @param root - pointer to root node
*/ */
void freeWinList(){ void freeWinList(){
WinList *node = root, *next; WinList *node = root, *next;

17
image_view_module/list.h
View File

@ -29,14 +29,25 @@
#include "events.h" #include "events.h"
typedef struct{
GLubyte *rawdata; // raw image data
int protected; // don't delete this memory with window
int w; // size of image
int h;
int changed; // == 1 if data was changed outside (to redraw)
} rawimage;
typedef struct{ typedef struct{
int ID; // identificator int ID; // identificator
char *title; // title of window char *title; // title of window
GLuint Tex; // texture for image inside window GLuint Tex; // texture for image inside window
int GL_ID; // identificator of OpenGL window int GL_ID; // identificator of OpenGL window
GLubyte *rawdata; // raw image data rawimage *image; // raw image data
int w; int h; // image size int w; int h; // window size
float z; // z-coordinate (zoom) float x; float y; // image offset coordinates
float x0; float y0;// center of window for coords conversion
float zoom; // zoom aspect
float Daspect; // aspect ratio between image & window sizes
pthread_t thread; // identificator of thread that changes window data pthread_t thread; // identificator of thread that changes window data
pthread_mutex_t mutex;// mutex for operations with image pthread_mutex_t mutex;// mutex for operations with image
} windowData; } windowData;

BIN
image_view_module/locale/ru/LC_MESSAGES/openglview.mo
View File

Binary file not shown.

47
image_view_module/locale/ru/messages.po
View File

@ -8,7 +8,7 @@ msgid ""
msgstr "" msgstr ""
"Project-Id-Version: PACKAGE VERSION\n" "Project-Id-Version: PACKAGE VERSION\n"
"Report-Msgid-Bugs-To: \n" "Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2015-02-18 18:46+0300\n" "POT-Creation-Date: 2015-02-28 19:36+0300\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n" "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n" "Language-Team: LANGUAGE <LL@li.org>\n"
@ -17,41 +17,46 @@ msgstr ""
"Content-Type: text/plain; charset=koi8-r\n" "Content-Type: text/plain; charset=koi8-r\n"
"Content-Transfer-Encoding: 8bit\n" "Content-Transfer-Encoding: 8bit\n"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:175 #: /home/eddy/tmp/image_view_module/macros.c:175
msgid "No filename given!" msgid "No filename given!"
msgstr "îÅ ÕËÁÚÁÎÏ ÉÍÑ ÆÁÊÌÁ!" msgstr ""
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:177 #: /home/eddy/tmp/image_view_module/macros.c:177
#, c-format #, c-format
msgid "Can't open %s for reading" msgid "Can't open %s for reading"
msgstr "îÅ ÍÏÇÕ ÏÔËÒÙÔØ %s ÄÌÑ ÞÔÅÎÉÑ" msgstr ""
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:179 #: /home/eddy/tmp/image_view_module/macros.c:179
#, c-format #, c-format
msgid "Can't stat %s" msgid "Can't stat %s"
msgstr "îÅ ÍÏÇÕ ×ÙÐÏÌÎÉÔØ stat ÄÌÑ %s" msgstr ""
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:182 #: /home/eddy/tmp/image_view_module/macros.c:182
msgid "Mmap error for input" msgid "Mmap error for input"
msgstr "ïÛÉÂËÁ mmap ÄÌÑ ×ÈÏÄÎÙÈ ÄÁÎÎÙÈ" msgstr ""
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:183 #: /home/eddy/tmp/image_view_module/macros.c:183
msgid "Can't close mmap'ed file" msgid "Can't close mmap'ed file"
msgstr "îÅ ÍÏÇÕ ÚÁËÒÙÔØ mmap'ÎÕÔÙÊ ÆÁÊÌ" msgstr ""
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:192 #: /home/eddy/tmp/image_view_module/macros.c:192
msgid "Can't munmap" msgid "Can't munmap"
msgstr "îÅ ÍÏÇÕ ×ÙÚÙ×ÁÔØ munmap" msgstr ""
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/main.c:106
msgid "Can't init mutex!"
msgstr "îÅ ÍÏÇÕ ÉÎÉÃÉÉÒÏ×ÁÔØ ×ÚÁÉÍÎÏÅ ÉÓËÌÀÞÅÎÉÅ!"
#. cancel thread changing data #. cancel thread changing data
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/bmpview.c:102 #: /home/eddy/tmp/image_view_module/imageview.c:124
msgid "can't cancel a thread!" msgid "can't cancel a thread!"
msgstr "îÅ ÍÏÇÕ ÏÔÍÅÎÉÔØ ×ÙÐÏÌÎÅÎÉÅ ÐÏÔÏËÁ!" msgstr ""
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/bmpview.c:105 #: /home/eddy/tmp/image_view_module/imageview.c:127
msgid "Error removing from list" msgid "Error removing from list"
msgstr "ïÛÉÂËÁ ÕÄÁÌÅÎÉÑ ÉÚ ÓÐÉÓËÁ" msgstr ""
#: /home/eddy/tmp/image_view_module/imageview.c:318
msgid "Can't init mutex!"
msgstr ""
#. "õÖÅ ÉÎÉÃÉÁÌÉÚÉÒÏ×ÁÎÏ!"
#: /home/eddy/tmp/image_view_module/imageview.c:345
msgid "Already initialized!"
msgstr ""

29
image_view_module/locale/ru/ru.po
View File

@ -7,7 +7,7 @@
msgid "" msgid ""
msgstr "Project-Id-Version: PACKAGE VERSION\n" msgstr "Project-Id-Version: PACKAGE VERSION\n"
"Report-Msgid-Bugs-To: \n" "Report-Msgid-Bugs-To: \n"
"POT-Creation-Date: 2015-02-18 18:46+0300\n" "POT-Creation-Date: 2015-02-28 19:32+0300\n"
"PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n" "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
"Last-Translator: FULL NAME <EMAIL@ADDRESS>\n" "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
"Language-Team: LANGUAGE <LL@li.org>\n" "Language-Team: LANGUAGE <LL@li.org>\n"
@ -16,41 +16,50 @@ msgstr "Project-Id-Version: PACKAGE VERSION\n"
"Content-Type: text/plain; charset=koi8-r\n" "Content-Type: text/plain; charset=koi8-r\n"
"Content-Transfer-Encoding: 8bit\n" "Content-Transfer-Encoding: 8bit\n"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:183 #. "õÖÅ ÉÎÉÃÉÁÌÉÚÉÒÏ×ÁÎÏ!"
#: /home/eddy/tmp/image_view_module/imageview.c:345
msgid "Already initialized!"
msgstr ""
#: /home/eddy/tmp/image_view_module/macros.c:183
msgid "Can't close mmap'ed file" msgid "Can't close mmap'ed file"
msgstr "îÅ ÍÏÇÕ ÚÁËÒÙÔØ mmap'ÎÕÔÙÊ ÆÁÊÌ" msgstr "îÅ ÍÏÇÕ ÚÁËÒÙÔØ mmap'ÎÕÔÙÊ ÆÁÊÌ"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/main.c:106 #: /home/eddy/tmp/image_view_module/imageview.c:318
msgid "Can't init mutex!" msgid "Can't init mutex!"
msgstr "îÅ ÍÏÇÕ ÉÎÉÃÉÉÒÏ×ÁÔØ ×ÚÁÉÍÎÏÅ ÉÓËÌÀÞÅÎÉÅ!" msgstr "îÅ ÍÏÇÕ ÉÎÉÃÉÉÒÏ×ÁÔØ ×ÚÁÉÍÎÏÅ ÉÓËÌÀÞÅÎÉÅ!"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:192 #: /home/eddy/tmp/image_view_module/macros.c:192
msgid "Can't munmap" msgid "Can't munmap"
msgstr "îÅ ÍÏÇÕ ×ÙÚÙ×ÁÔØ munmap" msgstr "îÅ ÍÏÇÕ ×ÙÚÙ×ÁÔØ munmap"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:177 #: /home/eddy/tmp/image_view_module/macros.c:177
#, c-format #, c-format
msgid "Can't open %s for reading" msgid "Can't open %s for reading"
msgstr "îÅ ÍÏÇÕ ÏÔËÒÙÔØ %s ÄÌÑ ÞÔÅÎÉÑ" msgstr "îÅ ÍÏÇÕ ÏÔËÒÙÔØ %s ÄÌÑ ÞÔÅÎÉÑ"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:179 #: /home/eddy/tmp/image_view_module/macros.c:179
#, c-format #, c-format
msgid "Can't stat %s" msgid "Can't stat %s"
msgstr "îÅ ÍÏÇÕ ×ÙÐÏÌÎÉÔØ stat ÄÌÑ %s" msgstr "îÅ ÍÏÇÕ ×ÙÐÏÌÎÉÔØ stat ÄÌÑ %s"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/bmpview.c:105 #: /home/eddy/tmp/image_view_module/imageview.c:127
msgid "Error removing from list" msgid "Error removing from list"
msgstr "ïÛÉÂËÁ ÕÄÁÌÅÎÉÑ ÉÚ ÓÐÉÓËÁ" msgstr "ïÛÉÂËÁ ÕÄÁÌÅÎÉÑ ÉÚ ÓÐÉÓËÁ"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:182 #: /home/eddy/tmp/image_view_module/macros.c:182
msgid "Mmap error for input" msgid "Mmap error for input"
msgstr "ïÛÉÂËÁ mmap ÄÌÑ ×ÈÏÄÎÙÈ ÄÁÎÎÙÈ" msgstr "ïÛÉÂËÁ mmap ÄÌÑ ×ÈÏÄÎÙÈ ÄÁÎÎÙÈ"
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/macros.c:175 #: /home/eddy/tmp/image_view_module/macros.c:175
msgid "No filename given!" msgid "No filename given!"
msgstr "îÅ ÕËÁÚÁÎÏ ÉÍÑ ÆÁÊÌÁ!" msgstr "îÅ ÕËÁÚÁÎÏ ÉÍÑ ÆÁÊÌÁ!"
#. cancel thread changing data #. cancel thread changing data
#: /home/eddy/tmp/wavelets-hough-and-so-on/image_view_module/bmpview.c:102 #: /home/eddy/tmp/image_view_module/imageview.c:124
msgid "can't cancel a thread!" msgid "can't cancel a thread!"
msgstr "îÅ ÍÏÇÕ ÏÔÍÅÎÉÔØ ×ÙÐÏÌÎÅÎÉÅ ÐÏÔÏËÁ!" msgstr "îÅ ÍÏÇÕ ÏÔÍÅÎÉÔØ ×ÙÐÏÌÎÅÎÉÅ ÐÏÔÏËÁ!"
#, fuzzy
#~ msgid "Can't init main GLUT mutex!"
#~ msgstr "îÅ ÍÏÇÕ ÉÎÉÃÉÉÒÏ×ÁÔØ ×ÚÁÉÍÎÏÅ ÉÓËÌÀÞÅÎÉÅ!"

132
image_view_module/main.c
View File

@ -18,48 +18,28 @@
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
* MA 02110-1301, USA. * MA 02110-1301, USA.
*/ */
#include <sys/time.h> #include <sys/time.h>
#include <stdio.h> #include <stdio.h>
#include <getopt.h> #include <getopt.h>
#include <stdbool.h> #include <stdbool.h>
#include <X11/Xlib.h> // XInitThreads();
#include "main.h" #include "main.h"
#include "macros.h" #include "macros.h"
#include "bmpview.h" #include "imageview.h"
//GLubyte *BitmapBits = NULL;
/*
pthread_mutex_t m_ima = PTHREAD_MUTEX_INITIALIZER, m_wvlt = PTHREAD_MUTEX_INITIALIZER,
m_hist = PTHREAD_MUTEX_INITIALIZER;
*/
unsigned int bufsize;
void help(char *s){
fprintf(stderr, "\n\n%s, simple interface for LOMO's webcam \"microscope\"\n", s);
fprintf(stderr, "Usage: %s [-h] [-d videodev] [-c channel]\n\n", s);
fprintf(stderr,
"-h, --help:\tthis help\n"
"-d, --device:\tcapture from <videodev>\n"
"-c, --channel:\tset channel <channel> (0..3)\n"
);
fprintf(stderr, "\n\n");
}
void* change_image(void *data){ void* change_image(void *data){
FNAME(); FNAME();
windowData *win = (windowData*) data; windowData *win = (windowData*) data;
int w = win->w, h = win->h, x,y, id = win->ID; int w = win->image->w, h = win->image->h, x,y, id = win->ID;
GLubyte i; GLubyte i;
DBG("w=%d, h=%d",w,h); DBG("w=%d, h=%d",w,h);
for(i = 1; ;i++){ for(i = 1; ;i++){
// DBG("search to refresh %d", id);
if(!searchWindow(id)) pthread_exit(NULL); if(!searchWindow(id)) pthread_exit(NULL);
// DBG("found, lock mutex");
pthread_mutex_lock(&win->mutex); pthread_mutex_lock(&win->mutex);
GLubyte *raw = win->rawdata; // DBG("refresh");
GLubyte *raw = win->image->rawdata;
for(y = 0; y < h; y++){ for(y = 0; y < h; y++){
if(y%20 == 19){ if(y%20 == 19){
raw += w*3; raw += w*3;
@ -74,79 +54,49 @@ void* change_image(void *data){
raw += 3; raw += 3;
} }
} }
win->image->changed = 1;
pthread_mutex_unlock(&win->mutex); pthread_mutex_unlock(&win->mutex);
usleep(10000); usleep(10000);
//sleep(1);
} }
} }
/* void *main_thread(_U_ void *none){
void *GLloop(void *data){ // while(1){};
FNAME(); rawimage im;
windowData *win = (windowData *)data; windowData *mainwin, *win, *third;
createWindow(win); int w = 640, h = 480;
im.protected = 1;
im.rawdata = MALLOC(GLubyte, w*h*3);
im.w = w; im.h = h;
mainwin = createGLwin("Sample window", w, h, &im);
DBG("ok");
if(!mainwin) ERRX("can't create main");
pthread_create(&mainwin->thread, NULL, &change_image, (void*)mainwin);
win = createGLwin("Second window", w/2, h/2, NULL);
if(!win) ERRX("can't create second");
pthread_create(&win->thread, NULL, &change_image, (void*)win);
pthread_join(mainwin->thread, NULL);
pthread_join(win->thread, NULL);
clear_GL_context();
WARNX("Two windows closed, create another one");
imageview_init(); // init after killing
third = createGLwin("third window", w*2, h, &im);
if(!third) ERRX("can't create third");
pthread_create(&third->thread, NULL, &change_image, (void*)third);
pthread_join(third->thread, NULL);
DBG("try to clear");
clear_GL_context();
DBG("cleared");
return NULL; return NULL;
} }
*/
/**
* create new window, run thread & return pointer to its structure or NULL
* @param title - header (copyed inside this function)
* @param w,h - image size
*/
windowData *createGLwin(char *title, int w, int h){
windowData *win = MALLOC(windowData, 1);
if(!addWindow(win)){
FREE(win);
return NULL;
}
GLubyte *raw = MALLOC(GLubyte, w*h*3);
win->title = strdup(title);
win->rawdata = raw;
if(pthread_mutex_init(&win->mutex, NULL)){
WARN(_("Can't init mutex!"));
removeWindow(win->ID);
return NULL;
}
win->w = w;
win->h = h;
// pthread_create(&win->glthread, NULL, GLloop, (void*)win);
createWindow(win);
return win;
}
/*
GLubyte *prepareImage(){
static GLubyte *imPtr = NULL;
//static int bufferSize;
//int readlines, linesize;
//GLubyte *ptr;
if(!imPtr) imPtr = calloc(100, sizeof(GLubyte));
return imPtr;
}
*/
int main(_U_ int argc, _U_ char** argv){
windowData *mainwin, _U_ *win, _U_ *third;
int w = 640, h = 480;
char *v[] = {PROJNAME, NULL};
int c = 1;
glutInit(&c, v);
int main(_U_ int argc, _U_ char **argv){
pthread_t mainthread;
initial_setup(); // locale & messages initial_setup(); // locale & messages
XInitThreads(); // we need it for threaded windows imageview_init();
//BitmapBits = prepareImage(); DBG("init main thread");
mainwin = createGLwin("Sample window", w, h); pthread_create(&mainthread, NULL, &main_thread, NULL);
if(!mainwin) return 1; pthread_join(mainthread, NULL);
pthread_create(&mainwin->thread, NULL, &change_image, (void*)mainwin);
win = createGLwin("Second window", w/2, h/2);
if(!win) return 1;
pthread_create(&win->thread, NULL, &change_image, (void*)win);
third = createGLwin("Second window", w/4, h/4);
if(!win) return 1;
pthread_create(&third->thread, NULL, &change_image, (void*)third);
// wait for end
glutMainLoop();
return 0; return 0;
} }

44
opengl.c Normal file
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// the simplest opengl example
#include <GL/glut.h>
#include <math.h>
// compile:
// gcc -Wall -Wextra -Werror -lglut -lGL -lm -std=gnu99 -D_GNU_SOURCE opengl.c -o openglcircle
#define _U_ __attribute__((__unused__))
// exit by ctrl+q or escape
void keyPressed(unsigned char key, _U_ int x, _U_ int y){
int mod = glutGetModifiers(); // window = glutGetWindow()
if(mod == GLUT_ACTIVE_CTRL && key == 'q') exit(0);
else if(key == 27) exit(0);
}
void DrawCircle(float cx, float cy, float r, int num_segments){
float theta = 2. * M_PI / (float)num_segments;
float c, s, t, x = r, y = 0.;
sincosf(theta, &s, &c);
glBegin(GL_LINE_LOOP);
for(int ii = 0; ii < num_segments; ii++){
glVertex2f(x + cx, y + cy);
t = x;
x = c * x - s * y;
y = s * t + c * y;
}
glEnd();
}
void display(){
glClear(GL_COLOR_BUFFER_BIT);
DrawCircle(0.,0.,0.5,100);
glFlush();
}
int main(int argc, char** argv){
glutInit(&argc, argv);
glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
glutInitWindowSize(400, 400);
glutCreateWindow("A Simple Circle");
glutDisplayFunc(display);
glutKeyboardFunc(keyPressed);
glutMainLoop();
}

122
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#include <unistd.h>
#include <sys/sendfile.h>
#include <fcntl.h>
#include <sys/stat.h>
#include <stdlib.h>
#include <stdio.h>
#include <sys/time.h>
#include <sys/mman.h>
/*
./sendfile Titanik.mp4
Copied by sendfile, time: 30.1055s
Copied by mmap, time: 35.6469s
du Titanik.mp4
2.6GTitanik.mp4
*/
double dtime(){
double t;
struct timeval tv;
gettimeofday(&tv, NULL);
t = tv.tv_sec + ((double)tv.tv_usec)/1e6;
return t;
}
typedef struct{
char *data;
size_t len;
} mmapbuf;
void My_munmap(mmapbuf **b){
if(munmap((*b)->data, (*b)->len))
perror("Can't munmap");
free(*b);
*b = NULL;
}
mmapbuf *My_mmap(char *filename){
int fd;
char *ptr = NULL;
size_t Mlen;
struct stat statbuf;
if((fd = open(filename, O_RDONLY)) < 0){
perror("Can't open file for reading");
goto ret;
}
if(fstat (fd, &statbuf) < 0){
perror("Can't stat file");
goto ret;
}
Mlen = statbuf.st_size;
if((ptr = mmap (0, Mlen, PROT_READ, MAP_PRIVATE, fd, 0)) == MAP_FAILED){
perror("Mmap error for input");
goto ret;
}
mmapbuf *ret = calloc(sizeof(mmapbuf), 1);
if(ret){
ret->data = ptr;
ret->len = Mlen;
}else munmap(ptr, Mlen);
ret:
if(close(fd)) perror("Can't close mmap'ed file");
return ret;
}
int main(int argc, char **argv){
struct stat st;
double T0;
if(argc != 2){
printf("Usage: %s file\n", argv[0]);
return 2;
}
if (stat(argv[1], &st) == 0 && S_ISREG(st.st_mode)){
off_t off = 0;
int fd = open(argv[1], O_RDONLY);
int fdo = open("tmpoutput", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd < 0 || fdo < 0){
perror("can't open");
return 1;
}
T0 = dtime();
posix_fadvise(fd, 0, 0, POSIX_FADV_SEQUENTIAL);
while (off < st.st_size) {
ssize_t bytes = sendfile(fdo, fd, &off, st.st_size - off);
if (bytes <= 0){
perror("can't sendfile");
}
}
close(fd);
close(fdo);
printf("Copied by sendfile, time: %gs\n", dtime()-T0);
T0 = dtime();
mmapbuf *map = My_mmap(argv[1]);
if(map){
fdo = open("tmpoutput", O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR | S_IRGRP | S_IROTH);
if (fd < 0 || fdo < 0){
perror("can't open");
return 1;
}
size_t written = 0, towrite = map->len;
char *ptr = map->data;
do{
ssize_t wr = write(fdo, ptr, towrite);
if(wr <= 0) break;
written += wr;
towrite -= wr;
ptr += wr;
}while(towrite);
if(written != map->len){
printf("err: writed only %zd byted of %zd\n", written, map->len);
}
close(fdo);
My_munmap(&map);
printf("Copied by mmap, time: %gs\n", dtime()-T0);
}
}else
perror("Can't stat file");
return 0;
}