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#include "config.h"
#include <string.h>
#include <stdlib.h>
/****h* libAfterImage/tutorials/ASView_GL
* NAME
* ASView_GL
* SYNOPSIS
* Simple image viewer based on libAfterImage, using OpenGL API to transfer image to X.
* DESCRIPTION
* All we want to do here is to get image filename from the command line,
* then load this image, and display it in simple window.
* After that we would want to wait, until user closes our window.
* SOURCE
*/
#define LOCAL_DEBUG
#define DO_CLOCKING
#include "../afterbase.h"
#include "../afterimage.h"
#include "common.h"
#ifdef DO_CLOCKING
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
# include <sys/time.h>
# else
# include <time.h>
# endif
#endif
#endif
#include <GL/gl.h>
#include <GL/glx.h>
void usage()
{
printf( "Usage: asview [-h]|[image]\n");
printf( "Where: image - filename of the image to display.\n");
}
void
glbuf2GLXPixmap(ASVisual *asv, Pixmap p, GLXContext glctx, ASImage *im )
{
// GLboolean bparam;
GLXPixmap glxp;
int glbuf_size = 3 * im->width * im->height;
CARD8 *glbuf = NULL;
ASImageDecoder *imdec = NULL ;
if ((imdec = start_image_decoding(asv, im, SCL_DO_COLOR, 0, 0, im->width, im->height, NULL)) != NULL )
{
int i, l = glbuf_size;
glbuf = safemalloc( glbuf_size );
for (i = 0; i < (int)im->height; i++)
{
int k = im->width;
imdec->decode_image_scanline( imdec );
while( --k >= 0 )
{
glbuf[--l] = imdec->buffer.blue[k] ;
glbuf[--l] = imdec->buffer.green[k] ;
glbuf[--l] = imdec->buffer.red[k] ;
}
}
stop_image_decoding( &imdec );
}else
return;
// show_warning( "asimage2pmap");
//fprintf( stderr, "p = %lX, glxp = %lX, glctx = %p\n", p, glxp, glctx );
glxp = glXCreateGLXPixmap( dpy, &(asv->visual_info), p);
glXMakeCurrent (dpy, glxp, glctx);
//fprintf( stderr, "line = %d, glerror = %d\n", __LINE__, glGetError() );
glDisable(GL_BLEND); /* optimize pixel transfer rates */
glDisable (GL_DEPTH_TEST);
glDisable (GL_DITHER);
glDisable (GL_FOG);
glDisable (GL_LIGHTING);
glViewport(-(im->width/2), -(im->height/2), im->width, im->height);
//glGetBooleanv (GL_DOUBLEBUFFER, &bparam);
//fprintf( stderr, "doublebuffer = %d\n", bparam );
//if (bparam == GL_TRUE)
glDrawBuffer (GL_FRONT);
/* now put pixels on */
// glRasterPos3i( 0, 0, 0 );
//fprintf( stderr, "line = %d, glerror = %d\n", __LINE__, glGetError() );
//fprintf( stderr, "i = %d\n", i );
// show_warning( "glDrawPixels ...");
glDrawPixels( im->width, im->height, GL_RGB, GL_UNSIGNED_BYTE, glbuf );
free( glbuf );
// show_warning( "glDrawPixels done");
glXMakeCurrent (dpy, None, NULL);
glXDestroyGLXPixmap( dpy, glxp);
glFinish();
}
int main(int argc, char* argv[])
{
char *image_file = "rose512.jpg" ;
ASImage *im ;
/* see ASView.1 : */
set_application_name( argv[0] );
#if (HAVE_AFTERBASE_FLAG==1)
set_output_threshold(OUTPUT_LEVEL_DEBUG);
#endif
if( argc > 1 )
{
if( strcmp( argv[1], "-h" ) == 0 )
{
usage();
return 0;
}
image_file = argv[1] ;
}else
{
show_warning( "Image filename was not specified. "
"Using default: \"%s\"", image_file );
usage();
}
/* see ASView.2 : */
im = file2ASImage( image_file, 0xFFFFFFFF, SCREEN_GAMMA, 0, getenv("IMAGE_PATH"), NULL );
/* The following could be used to dump JPEG version of the image into
* stdout : */
/* ASImage2file( im, NULL, NULL, ASIT_Jpeg, NULL ); */
if( im != NULL )
{
#ifndef X_DISPLAY_MISSING
Window w = None;
ASVisual *asv ;
int screen, depth ;
#if 0
XRectangle *rects ; unsigned int rects_count =0; int i ;
rects = get_asimage_channel_rects( im, IC_ALPHA, 10,
&rects_count );
fprintf( stderr, " %d rectangles generated : \n", rects_count );
for( i = 0 ; i < rects_count ; ++i )
fprintf( stderr, "\trect[%d]=%dx%d%+d%+d;\n",
i, rects[i].width, rects[i].height,
rects[i].x, rects[i].y );
#endif
dpy = XOpenDisplay(NULL);
XSynchronize (dpy, True);
if (! glXQueryExtension (dpy, NULL, NULL))
{
show_error("X server does not support OpenGL GLX extension");
return 0 ;
}
_XA_WM_DELETE_WINDOW = XInternAtom( dpy, "WM_DELETE_WINDOW",
False);
screen = DefaultScreen(dpy);
depth = DefaultDepth( dpy, screen );
/* see ASView.3 : */
asv = create_asvisual( dpy, screen, depth, NULL );
/* test example for fill_asimage : */
#if 0
fill_asimage(asv, im, 0, 0, 50, 50, 0xFFFF0000);
fill_asimage(asv, im, 50, 50, 100, 50, 0xFFFF0000);
fill_asimage(asv, im, 0, 100, 200, 50, 0xFFFF0000);
fill_asimage(asv, im, 150, 0, 50, 50, 0xFFFF0000);
#endif
/* test example for conversion to argb32 :*/
#if 0
{
ASImage *tmp = tile_asimage( asv, im, 0, 0, im->width, im->height, TINT_NONE, ASA_ARGB32,
0, ASIMAGE_QUALITY_DEFAULT );
destroy_asimage( &im );
set_flags( tmp->flags, ASIM_DATA_NOT_USEFUL|ASIM_XIMAGE_NOT_USEFUL );
im = tmp ;
}
#endif
/* see ASView.4 : */
w = create_top_level_window( asv, DefaultRootWindow(dpy), 32, 32,
im->width, im->height, 1, 0, NULL,
"ASView - using OpenGL", image_file );
if( w != None )
{
Pixmap p;
int i ;
XMapRaised (dpy, w);
XSync(dpy,False);
//sleep_a_millisec(1000);
//XSync(dpy,False);
/* see ASView.5 : */
// show_warning( "asimage2pmap Done");
p = create_visual_pixmap( asv, DefaultRootWindow(dpy), im->width, im->height, 0 );
{
START_TIME(started);
time_t t = time(NULL);
for( i = 0 ; i < 100 ; ++i )
{
#define DIRECT_TO_WIN 0
#define USEXGL 1
#if USEXGL
# if !DIRECT_TO_WIN
asimage2drawable_gl( asv, p, im, 0, 0, 0, 0, im->width, 127/*im->height*/, im->width, im->height, False );
# else
asimage2drawable_gl( asv, w, im, 0, 0, 0, 0, im->width, 128/*im->height*/, im->width, im->height, True );
# endif
#else
# if !DIRECT_TO_WIN
asimage2drawable( asv, p, im, NULL, 0, 0, 0, 0, im->width, im->height, False);
# else
asimage2drawable( asv, w, im, NULL, 0, 0, 0, 0, im->width, im->height, False);
# endif
#endif
LOCAL_DEBUG_OUT ("timestamp%s","");
XSync(dpy, False);
}
SHOW_TIME("", started);
fprintf( stderr, "runtime = %ld sec\n", time(NULL)-t );
}
/* print_storage(NULL); */
destroy_asimage( &im );
/* see common.c:set_window_background_and_free(): */
# if !DIRECT_TO_WIN
p = set_window_background_and_free( w, p );
#endif
}
/* see common.c: wait_closedown() : */
wait_closedown(w);
#else
/* writing result into the file */
ASImage2file( im, NULL, "asview.jpg", ASIT_Jpeg, NULL );
#endif
}
return 0 ;
}
/**************/
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