1 //video_init.c - SDL/Opengl Windowing Creation/Resizing Functions
2 //
3 //by Peter Sperl
4 //
5 //Opens an SDL Window and creates an OpenGL session
6 //also able to handle resizing and fullscreening of windows
7 //just call init_display again with differant variables
8
9 #include <SDL/SDL.h>
10 #include <GL/gl.h>
11 #include <GL/glu.h>
12 #include "video_init.h"
13 #include <iostream>
14 extern SDL_Surface *screen;
15 extern int texsize;
16
resize_display(int w,int h,int f)17 void resize_display(int w, int h, int f) {
18 int flags;
19 if (f) flags = SDL_OPENGL|SDL_HWSURFACE|SDL_FULLSCREEN;
20 else flags = SDL_OPENGL|SDL_HWSURFACE|SDL_RESIZABLE;
21 // SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
22 screen = SDL_SetVideoMode( w, h, 0, flags ) ;
23 if(screen == 0 ) {
24 fprintf( stderr, "Video mode set failed: %s\n", SDL_GetError( ) );
25 return;
26 }
27
28 SDL_ShowCursor(f ? SDL_DISABLE : SDL_ENABLE);
29 }
30
31 //init_display
32 //
33 //Sets screen to new width and height (w,h)
34 //Also switches between fullscreen and windowed
35 //with the boolean f (fullscreen)
init_display(int w,int h,int * fvw,int * fvh,int f)36 void init_display(int w, int h, int *fvw, int *fvh, int f)
37 {
38
39 /* Information about the current video settings. */
40 const SDL_VideoInfo* info = NULL;
41 int bpp = 0;
42 /* Flags we will pass into SDL_SetVideoMode. */
43 int flags = 0;
44
45
46 /* Let's get some video information. */
47 info = SDL_GetVideoInfo( );
48 if( !info ) {
49 /* This should probably never happen. */
50 fprintf( stderr, "Video query failed: %s\n",
51 SDL_GetError( ) );
52 // projectM_vtable.disable_plugin (&projectM_vtable);
53 return;
54 }
55
56 // printf("Screen Resolution: %d x %d\n", info->current_w, info->current_h);
57 *fvw = info->current_w;
58 *fvh = info->current_h;
59 bpp = info->vfmt->BitsPerPixel;
60 //SDL_GL_SetAttribute( SDL_GL_RED_SIZE, 8 );
61 //SDL_GL_SetAttribute( SDL_GL_GREEN_SIZE, 8 );
62 //SDL_GL_SetAttribute( SDL_GL_BLUE_SIZE, 8 );
63
64 // SDL_GL_SetAttribute( SDL_GL_ACCUM_RED_SIZE, 8 );
65 // SDL_GL_SetAttribute( SDL_GL_ACCUM_GREEN_SIZE, 8 );
66 // SDL_GL_SetAttribute( SDL_GL_ACCUM_BLUE_SIZE, 8 );
67 SDL_GL_SetAttribute( SDL_GL_ALPHA_SIZE, 8 );
68 SDL_GL_SetAttribute( SDL_GL_DEPTH_SIZE, 16 );
69 SDL_GL_SetAttribute( SDL_GL_DOUBLEBUFFER, 1 );
70 if (f==0)
71 flags = SDL_OPENGL|SDL_HWSURFACE|SDL_RESIZABLE;
72 else flags = SDL_OPENGL|SDL_HWSURFACE|SDL_FULLSCREEN;
73 screen= SDL_SetVideoMode( w, h, bpp, flags ) ;
74 if(screen == 0 ) {
75 /*
76 * This could happen for a variety of reasons,
77 * including DISPLAY not being set, the specified
78 * resolution not being available, etc.
79 */
80 fprintf( stderr, "Video mode set failed: %s\n",
81 SDL_GetError( ) );
82
83 // projectM_vtable.disable_plugin (&projectM_vtable);
84 return;
85
86 }
87
88 // setup_opengl(w,h);
89 //gluOrtho2D(0, w, 0, h);
90 }
91
92
93