void nojpegsupport( void )
{
char *s[6] = {
"Warning!",
"You need libjpeg (http://www.ijg.org) and enable",
"jpeg support in the GRX lib (edit makedefs.grx)",
"to run this demo",
" ",
"Press any key to continue..." };
int i;
grx_clear_screen( grx_color_get( 0,0,100 ) );
for( i=0; i<6; i++ )
grx_draw_text( s[i],90,160+i*18,text_opt );
GrKeyRead();
}
void drawellip(int xc,int yc,int rx,int ry,GrxColor c1,GrxColor c2,GrxColor c3)
{
double ddx = (double)rx;
double ddy = (double)ry;
double R2 = ddx*ddx*ddy*ddy;
double SQ;
int x1,x2,y1,y2;
int dx,dy;
int *wdt, idx;
GrxLineOptions *l;
for (idx = 0, l = *Patterns; l != NULL; l = Patterns[++idx])
for (wdt=widths; *wdt != 0; ++wdt) {
grx_clear_screen(GRX_COLOR_BLACK);
grx_draw_filled_box(xc-rx,yc-ry,xc+rx,yc+ry,c1);
dx = rx;
dy = 0;
grx_draw_pixel(xc-dx,yc,c3);
grx_draw_pixel(xc+dx,yc,c3);
while(++dy <= ry) {
SQ = R2 - (double)dy * (double)dy * ddx * ddx;
dx = (int)(sqrt(SQ)/ddy + 0.5);
x1 = xc - dx;
x2 = xc + dx;
y1 = yc - dy;
y2 = yc + dy;
grx_draw_pixel(x1,y1,c3);
grx_draw_pixel(x2,y1,c3);
grx_draw_pixel(x1,y2,c3);
grx_draw_pixel(x2,y2,c3);
}
l->color = c2;
l->width = *wdt;
grx_draw_ellipse_with_options(xc,yc,rx,ry,l);
if(GrKeyRead() == 'q') {
stop = 1;
return;
}
}
}
void imagen( char *nf, int scale )
{
GrxContext *grc;
int wide, high;
char s[81];
int w, h;
grx_query_jpeg_file( nf,&w,&h );
sprintf( s,"%s %dx%d scale 1/%d",nf,w,h,scale );
wide = (w/scale > 600) ? 600 : w/scale;
high = (h/scale > 400) ? 400 : h/scale;
grx_clear_screen( grx_color_get( 0,0,200 ) );
grx_draw_box( 10,40,10+wide+1,40+high+1,GRX_COLOR_WHITE );
grc = grx_context_new_subcontext( 11,41,11+wide-1,41+high-1,NULL,NULL );
grx_context_load_from_jpeg( grc,nf,scale,NULL );
grx_context_unref( grc );
grx_draw_text( s,10,10,text_opt );
grx_draw_text( "Press any key to continue",10,50+high,text_opt );
GrKeyRead();
}
int main(void)
{
GrxTextOptions *text_opt;
GrxContext *grc;
GrxPnmFormat format;
int wide, high, maxval;
char s[81];
GError *error = NULL;
{
GrxFont *font;
font = grx_font_load(NULL, -1, &error);
if (!font) {
g_error("%s", error->message);
}
text_opt = grx_text_options_new_full(font, GRX_COLOR_BLACK, GRX_COLOR_WHITE,
GRX_TEXT_HALIGN_LEFT, GRX_TEXT_VALIGN_TOP);
grx_font_unref(font);
}
if (!grx_set_mode(GRX_GRAPHICS_MODE_GRAPHICS_WIDTH_HEIGHT_COLOR,&error,640,480,32768)) {
g_error("%s", error->message);
}
grx_query_pnm_file( FIMAGEPPM, &format, &wide, &high, &maxval );
sprintf( s,"%s %d x %d pixels",FIMAGEPPM,wide,high );
grx_draw_text(s, 10, 20, text_opt);
grx_draw_box( 10,40,10+wide+1,40+high+1,GRX_COLOR_WHITE );
grc = grx_context_new_subcontext( 11,41,11+wide-1,41+high-1,NULL,NULL );
grx_context_load_from_pnm( grc,FIMAGEPPM,NULL );
grx_context_save_to_pgm( grc,FIMAGEPGM,"TestPnm",NULL );
grx_context_unref( grc );
grx_draw_text("Press any key to continue", 10, 50+high, text_opt);
GrKeyRead();
grx_clear_screen( GRX_COLOR_BLACK );
grx_query_pnm_file( FIMAGEPGM, &format, &wide, &high, &maxval );
sprintf( s,"%s %d x %d pixels",FIMAGEPGM,wide,high );
grx_draw_text(s, 10, 20, text_opt);
grx_draw_box( 10,40,10+wide+1,40+high+1,GRX_COLOR_WHITE );
grc = grx_context_new_subcontext( 11,41,11+wide-1,41+high-1,NULL,NULL );
grx_context_load_from_pnm( grc,FIMAGEPGM,NULL );
grx_context_unref( grc );
grx_draw_text("Press any key to continue", 10, 50+high, text_opt);
GrKeyRead();
grx_clear_screen( GRX_COLOR_BLACK );
grx_query_pnm_file( FIMAGEPBM, &format, &wide, &high, &maxval );
sprintf( s,"%s %d x %d pixels",FIMAGEPBM,wide,high );
grx_draw_text(s, 10, 20, text_opt);
grx_draw_box( 10,40,10+wide+1,40+high+1,GRX_COLOR_WHITE );
grc = grx_context_new_subcontext( 11,41,11+wide-1,41+high-1,NULL,NULL );
grx_context_load_from_pnm( grc,FIMAGEPBM,NULL );
grx_context_save_to_pbm( grc,FIMAGEPBM2,"TestPnm",NULL );
grx_context_unref( grc );
grx_draw_text("Press any key to continue", 10, 50+high, text_opt);
GrKeyRead();
grx_clear_screen( GRX_COLOR_BLACK );
grx_query_pnm_file( FIMAGEPPM, &format, &wide, &high, &maxval );
grx_draw_box( 10,40,10+wide+1,40+high+1,GRX_COLOR_WHITE );
grc = grx_context_new_subcontext( 11,41,11+wide-1,41+high-1,NULL,NULL );
grx_context_load_from_pnm( grc,FIMAGEPPM,NULL );
grx_context_unref( grc );
grx_query_pnm_file( FIMAGEPGM, &format, &wide, &high, &maxval );
grx_draw_box( 110,140,110+wide+1,140+high+1,GRX_COLOR_WHITE );
grc = grx_context_new_subcontext( 111,141,111+wide-1,141+high-1,NULL,NULL );
grx_context_load_from_pnm( grc,FIMAGEPGM,NULL );
grx_context_unref( grc );
grx_query_pnm_file( FIMAGEPBM, &format, &wide, &high, &maxval );
grx_draw_box( 210,240,210+wide+1,240+high+1,GRX_COLOR_WHITE );
grc = grx_context_new_subcontext( 211,241,211+wide-1,241+high-1,NULL,NULL );
grx_context_load_from_pnm( grc,FIMAGEPBM2,NULL );
grx_context_unref( grc );
grx_draw_text("Press any key to save screen", 10, 20, text_opt);
GrKeyRead();
grx_context_save_to_ppm( NULL,FSCREEN,"TestPnm",NULL );
grx_clear_screen( GRX_COLOR_WHITE );
grx_draw_text("Press any key to reload screen", 10, 20, text_opt);
GrKeyRead();
grx_context_load_from_pnm( NULL,FSCREEN,NULL );
grx_draw_text("Press any key to end ", 10, 20, text_opt);
GrKeyRead();
grx_set_mode(GRX_GRAPHICS_MODE_TEXT_DEFAULT, NULL);
grx_text_options_unref(text_opt);
return 0;
}
int main()
{
GrxContext *grc;
GError *error = NULL;
{
GrxFont *font;
font = grx_font_load(NULL, -1, &error);
if (!font) {
g_error("%s", error->message);
}
text_opt = grx_text_options_new_full(font, GRX_COLOR_BLACK, GRX_COLOR_WHITE,
GRX_TEXT_HALIGN_LEFT, GRX_TEXT_VALIGN_TOP);
grx_font_unref(font);
}
if (!grx_set_mode(GRX_GRAPHICS_MODE_GRAPHICS_WIDTH_HEIGHT_BPP,&error,640,480,24)) {
g_error("%s", error->message);
}
imagen( "jpeg1.jpg",1 );
imagen( "jpeg1.jpg",2 );
imagen( "jpeg1.jpg",4 );
imagen( "jpeg1.jpg",8 );
imagen( "jpeg2.jpg",1 );
imagen( "jpeg2.jpg",2 );
imagen( "jpeg2.jpg",4 );
imagen( "jpeg2.jpg",8 );
grx_clear_screen( grx_color_get( 0,100,0 ) );
grc = grx_context_new_subcontext( 10,40,10+400-1,40+300-1,NULL,NULL );
grx_context_load_from_jpeg( grc,"jpeg1.jpg",2,NULL );
grx_context_unref( grc );
grc = grx_context_new_subcontext( 210,150,210+400-1,150+300-1,NULL,NULL );
grx_context_load_from_jpeg( grc,"jpeg2.jpg",2,NULL );
grx_context_unref( grc );
grx_draw_text( "Press any key to save color and gray screen",10,10,text_opt );
GrKeyRead();
grx_context_save_to_jpeg( NULL,"p.jpg",75,NULL );
grx_context_save_to_jpeg_grayscale( NULL,"pgray.jpg",75,NULL );
grx_clear_screen( GRX_COLOR_BLACK );
grx_draw_text( "Press any key to reload color screen ",10,10,text_opt );
GrKeyRead();
grx_context_load_from_jpeg( NULL,"p.jpg",1,NULL );
grx_draw_text( "Press any key to reload gray screen ",10,10,text_opt );
GrKeyRead();
grx_clear_screen( GRX_COLOR_BLACK );
grx_context_load_from_jpeg( NULL,"pgray.jpg",1,NULL );
grx_draw_text( "Press any key to end ",10,10,text_opt );
GrKeyRead();
grx_text_options_unref(text_opt);
grx_set_mode(GRX_GRAPHICS_MODE_TEXT_DEFAULT, NULL);
return 0;
}
GrKeyType ws_waitforkey() {
return GrKeyRead();
}
