2 * $Logfile: /Freespace2/code/Graphics/GrOpenGL.cpp $
7 * Code that uses the OpenGL graphics library
10 * Revision 1.8 2002/05/29 03:30:05 relnev
13 * Revision 1.7 2002/05/29 02:52:32 theoddone33
14 * Enable OpenGL renderer
16 * Revision 1.6 2002/05/28 04:56:51 theoddone33
17 * runs a little bit now
19 * Revision 1.5 2002/05/28 04:07:28 theoddone33
20 * New graphics stubbing arrangement
22 * Revision 1.4 2002/05/27 23:39:34 relnev
25 * Revision 1.3 2002/05/27 22:35:01 theoddone33
28 * Revision 1.2 2002/05/27 22:32:02 theoddone33
29 * throw all d3d stuff at opengl
31 * Revision 1.1.1.1 2002/05/03 03:28:09 root
35 * 10 7/14/99 9:42a Dave
36 * Put in clear_color debug function. Put in base for 3dnow stuff / P3
39 * 9 7/09/99 9:51a Dave
40 * Added thick polyline code.
42 * 8 6/29/99 10:35a Dave
43 * Interface polygon bitmaps! Whee!
45 * 7 2/03/99 11:44a Dave
46 * Fixed d3d transparent textures.
48 * 6 1/24/99 11:37p Dave
49 * First full rev of beam weapons. Very customizable. Removed some bogus
50 * Int3()'s in low level net code.
52 * 5 12/18/98 1:13a Dave
53 * Rough 1024x768 support for Direct3D. Proper detection and usage through
56 * 4 12/06/98 2:36p Dave
57 * Drastically improved nebula fogging.
59 * 3 11/11/98 5:37p Dave
60 * Checkin for multiplayer testing.
62 * 2 10/07/98 10:53a Dave
65 * 1 10/07/98 10:49a Dave
67 * 14 5/20/98 9:46p John
68 * added code so the places in code that change half the palette don't
69 * have to clear the screen.
71 * 13 5/06/98 5:30p John
72 * Removed unused cfilearchiver. Removed/replaced some unused/little used
73 * graphics functions, namely gradient_h and _v and pixel_sp. Put in new
74 * DirectX header files and libs that fixed the Direct3D alpha blending
77 * 12 4/14/98 12:15p John
78 * Made 16-bpp movies work.
80 * 11 3/12/98 5:36p John
81 * Took out any unused shaders. Made shader code take rgbc instead of
82 * matrix and vector since noone used it like a matrix and it would have
83 * been impossible to do in hardware. Made Glide implement a basic
84 * shader for online help.
86 * 10 3/10/98 4:18p John
87 * Cleaned up graphics lib. Took out most unused gr functions. Made D3D
88 * & Glide have popups and print screen. Took out all >8bpp software
89 * support. Made Fred zbuffer. Made zbuffer allocate dynamically to
90 * support Fred. Made zbuffering key off of functions rather than one
93 * 9 12/02/97 4:00p John
94 * Added first rev of thruster glow, along with variable levels of
95 * translucency, which retquired some restructing of palman.
97 * 8 10/03/97 9:10a John
98 * added better antialiased line drawer
100 * 7 9/23/97 10:45a John
101 * made so you can tell bitblt code to rle a bitmap by passing flag to
104 * 6 9/09/97 11:01a Sandeep
105 * fixed warning level 4 bugs
107 * 5 7/10/97 2:06p John
108 * added code to specify alphablending type for bitmaps.
110 * 4 6/17/97 7:04p John
111 * added d3d support for gradients.
112 * fixed some color bugs by adding screen signatures instead of watching
113 * flags and palette changes.
115 * 3 6/12/97 2:50a Lawrance
116 * bm_unlock() now passed bitmap number, not pointer
118 * 2 6/11/97 1:12p John
119 * Started fixing all the text colors in the game.
121 * 1 5/12/97 12:14p John
128 #include <windowsx.h>
134 #include "floating.h"
136 #include "grinternal.h"
137 #include "gropengl.h"
140 static int Inited = 0;
142 // Throw in some dummy functions - DDOI
144 int D3D_32bit = 0; // grd3d.cpp
145 int D3D_fog_mode = -1; // grd3d.cpp
146 int D3D_inited = 0; // grd3d.cpp
147 int D3D_zbias = 1; // grd3d.cpp
148 int D3d_rendition_uvs = 0; // grd3d.cpp
150 void gr_dd_activate(int active) // grdirectdraw.cpp
155 void gr_directdraw_cleanup() // grdirectdraw.cpp
160 void gr_directdraw_force_windowed() // grdirectdraw.cpp
165 void gr_directdraw_init()
171 void gr_d3d_preload(int x, int y)
176 void d3d_start_frame()
181 void d3d_stop_frame()
191 void d3d_zbias (int a)
197 void gr_opengl_activate(int b)
202 void gr_opengl_preload_init()
207 void gr_opengl_pixel(int x, int y)
209 if ( x < gr_screen.clip_left ) return;
210 if ( x > gr_screen.clip_right ) return;
211 if ( y < gr_screen.clip_top ) return;
212 if ( y > gr_screen.clip_bottom ) return;
215 void gr_opengl_clear()
220 void gr_opengl_flip()
223 if (Inited) SDL_GL_SwapBuffers ();
227 void gr_opengl_flip_window(uint _hdc, int x, int y, int w, int h )
232 void gr_opengl_set_clip(int x,int y,int w,int h)
234 // check for sanity of parameters
240 if (x >= gr_screen.max_w)
241 x = gr_screen.max_w - 1;
242 if (y >= gr_screen.max_h)
243 y = gr_screen.max_h - 1;
245 if (x + w > gr_screen.max_w)
246 w = gr_screen.max_w - x;
247 if (y + h > gr_screen.max_h)
248 h = gr_screen.max_h - y;
250 if (w > gr_screen.max_w)
252 if (h > gr_screen.max_h)
255 gr_screen.offset_x = x;
256 gr_screen.offset_y = y;
257 gr_screen.clip_left = 0;
258 gr_screen.clip_right = w-1;
259 gr_screen.clip_top = 0;
260 gr_screen.clip_bottom = h-1;
261 gr_screen.clip_width = w;
262 gr_screen.clip_height = h;
267 void gr_opengl_reset_clip()
269 gr_screen.offset_x = 0;
270 gr_screen.offset_y = 0;
271 gr_screen.clip_left = 0;
272 gr_screen.clip_top = 0;
273 gr_screen.clip_right = gr_screen.max_w - 1;
274 gr_screen.clip_bottom = gr_screen.max_h - 1;
275 gr_screen.clip_width = gr_screen.max_w;
276 gr_screen.clip_height = gr_screen.max_h;
281 void gr_opengl_set_font(int fontnum)
286 void gr_opengl_set_color( int r, int g, int b )
288 Assert((r >= 0) && (r < 256));
289 Assert((g >= 0) && (g < 256));
290 Assert((b >= 0) && (b < 256));
292 gr_screen.current_color.red = (unsigned char)r;
293 gr_screen.current_color.green = (unsigned char)g;
294 gr_screen.current_color.blue = (unsigned char)b;
297 #warning STUB_FUNCTION: gr_opengl_set_color
300 void gr_opengl_set_bitmap( int bitmap_num, int alphablend_mode, int bitblt_mode, float alpha, int sx, int sy )
302 gr_screen.current_alpha = alpha;
303 gr_screen.current_alphablend_mode = alphablend_mode;
304 gr_screen.current_bitblt_mode = bitblt_mode;
305 gr_screen.current_bitmap = bitmap_num;
307 gr_screen.current_bitmap_sx = sx;
308 gr_screen.current_bitmap_sy = sy;
313 void gr_opengl_create_shader(shader * shade, float r, float g, float b, float c )
315 shade->screen_sig = gr_screen.signature;
324 void gr_opengl_set_shader( shader * shade )
327 if (shade->screen_sig != gr_screen.signature) {
328 gr_create_shader( shade, shade->r, shade->g, shade->b, shade->c );
330 gr_screen.current_shader = *shade;
332 gr_create_shader( &gr_screen.current_shader, 0.0f, 0.0f, 0.0f, 0.0f );
339 void gr_opengl_bitmap_ex(int x,int y,int w,int h,int sx,int sy)
345 bmp = bm_lock( gr_screen.current_bitmap, 8, 0 );
346 sptr = (ubyte *)( bmp->data + (sy*bmp->w+sx) );
348 // mprintf(( "x=%d, y=%d, w=%d, h=%d\n", x, y, w, h ));
349 // mprintf(( "sx=%d, sy=%d, bw=%d, bh=%d\n", sx, sy, bmp->w, bmp->h ));
351 for (i=0; i<h; i++ ) {
352 for ( j=0; j<w; j++ ) {
353 gr_set_color( gr_palette[sptr[j]*3+0], gr_palette[sptr[j]*3+1], gr_palette[sptr[j]*3+2] );
354 gr_pixel( x+j, i+y );
358 bm_unlock(gr_screen.current_bitmap);
363 void gr_opengl_bitmap(int x, int y)
367 bm_get_info( gr_screen.current_bitmap, &w, &h, NULL );
368 int dx1=x, dx2=x+w-1;
369 int dy1=y, dy2=y+h-1;
372 if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
373 if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
374 if ( dx1 < gr_screen.clip_left ) { sx = gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
375 if ( dy1 < gr_screen.clip_top ) { sy = gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
376 if ( dx2 > gr_screen.clip_right ) { dx2 = gr_screen.clip_right; }
377 if ( dy2 > gr_screen.clip_bottom ) { dy2 = gr_screen.clip_bottom; }
379 if ( sx < 0 ) return;
380 if ( sy < 0 ) return;
381 if ( sx >= w ) return;
382 if ( sy >= h ) return;
384 // Draw bitmap bm[sx,sy] into (dx1,dy1)-(dx2,dy2)
386 gr_bitmap_ex(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
389 static void opengl_scanline(int x1,int x2,int y)
394 void gr_opengl_rect(int x,int y,int w,int h)
429 opengl_scanline( x1, x2, y1+i );
435 void gr_opengl_shade(int x,int y,int w,int h)
440 void opengl_mtext(int x, int y, char *s, int len )
445 void gr_opengl_string(int x,int y,char * text)
452 p = strchr( p1, '\n' );
457 gr_get_string_size( &w, &h, p1 );
460 opengl_mtext(gr_screen.offset_x+(gr_screen.clip_width-w)/2,y+gr_screen.offset_y,p1,strlen(p1));
462 opengl_mtext(gr_screen.offset_x+x,y+gr_screen.offset_y,p1,strlen(p1));
465 if ( p1 && (strlen(p1) < 1) ) p1 = NULL;
473 void gr_opengl_circle( int xc, int yc, int d )
483 if ( (xc+r) < gr_screen.clip_left ) return;
484 if ( (xc-r) > gr_screen.clip_right ) return;
485 if ( (yc+r) < gr_screen.clip_top ) return;
486 if ( (yc-r) > gr_screen.clip_bottom ) return;
489 // Draw the first octant
490 opengl_scanline( xc-y, xc+y, yc-x );
491 opengl_scanline( xc-y, xc+y, yc+x );
496 // Draw the second octant
497 opengl_scanline( xc-x, xc+x, yc-y );
498 opengl_scanline( xc-x, xc+x, yc+y );
505 opengl_scanline( xc-x, xc+x, yc-y );
506 opengl_scanline( xc-x, xc+x, yc+y );
512 void gr_opengl_line(int x1,int y1,int x2,int y2)
519 int clipped = 0, swapped=0;
521 INT_CLIPLINE(x1,y1,x2,y2,gr_screen.clip_left,gr_screen.clip_top,gr_screen.clip_right,gr_screen.clip_bottom,return,clipped=1,swapped=1);
539 for(i=dx+1;i>0;i--) {
551 for(i=dy+1;i>0;i--) {
567 #define FIND_SCALED_NUM(x,x0,x1,y0,y1) (((((x)-(x0))*((y1)-(y0)))/((x1)-(x0)))+(y0))
569 void gr_opengl_scaler(vertex *va, vertex *vb )
571 float x0, y0, x1, y1;
572 float u0, v0, u1, v1;
573 float clipped_x0, clipped_y0, clipped_x1, clipped_y1;
574 float clipped_u0, clipped_v0, clipped_u1, clipped_v1;
575 float xmin, xmax, ymin, ymax;
576 int dx0, dy0, dx1, dy1;
578 //============= CLIP IT =====================
580 x0 = va->sx; y0 = va->sy;
581 x1 = vb->sx; y1 = vb->sy;
583 xmin = i2fl(gr_screen.clip_left); ymin = i2fl(gr_screen.clip_top);
584 xmax = i2fl(gr_screen.clip_right); ymax = i2fl(gr_screen.clip_bottom);
586 u0 = va->u; v0 = va->v;
587 u1 = vb->u; v1 = vb->v;
589 // Check for obviously offscreen bitmaps...
590 if ( (y1<=y0) || (x1<=x0) ) return;
591 if ( (x1<xmin ) || (x0>xmax) ) return;
592 if ( (y1<ymin ) || (y0>ymax) ) return;
594 clipped_u0 = u0; clipped_v0 = v0;
595 clipped_u1 = u1; clipped_v1 = v1;
597 clipped_x0 = x0; clipped_y0 = y0;
598 clipped_x1 = x1; clipped_y1 = y1;
600 // Clip the left, moving u0 right as necessary
602 clipped_u0 = FIND_SCALED_NUM(xmin,x0,x1,u0,u1);
606 // Clip the right, moving u1 left as necessary
608 clipped_u1 = FIND_SCALED_NUM(xmax,x0,x1,u0,u1);
612 // Clip the top, moving v0 down as necessary
614 clipped_v0 = FIND_SCALED_NUM(ymin,y0,y1,v0,v1);
618 // Clip the bottom, moving v1 up as necessary
620 clipped_v1 = FIND_SCALED_NUM(ymax,y0,y1,v0,v1);
624 dx0 = fl2i(clipped_x0); dx1 = fl2i(clipped_x1);
625 dy0 = fl2i(clipped_y0); dy1 = fl2i(clipped_y1);
627 if (dx1<=dx0) return;
628 if (dy1<=dy0) return;
630 //============= DRAW IT =====================
638 tmpu = (clipped_u1-clipped_u0) / (dx1-dx0);
639 if ( fl_abs(tmpu) < 0.001f ) {
640 return; // scaled up way too far!
642 tmpv = (clipped_v1-clipped_v0) / (dy1-dy0);
643 if ( fl_abs(tmpv) < 0.001f ) {
644 return; // scaled up way too far!
647 bp = bm_lock( gr_screen.current_bitmap, 8, 0 );
649 du = fl2f(tmpu*(bp->w-1));
650 dv = fl2f(tmpv*(bp->h-1));
652 v = fl2f(clipped_v0*(bp->h-1));
653 u = fl2f(clipped_u0*(bp->w-1));
656 spixels = (ubyte *)bp->data;
658 for (y=dy0; y<=dy1; y++ ) {
659 sbits = &spixels[bp->rowsize*(v>>16)];
663 for (x=0; x<w; x++ ) {
664 ubyte c = sbits[ tmp_u >> 16 ];
666 gr_set_color( gr_palette[c*3+0], gr_palette[c*3+1], gr_palette[c*3+2] );
667 gr_pixel( x+dx0, y );
674 bm_unlock(gr_screen.current_bitmap);
681 void gr_opengl_tmapper( int nv, vertex * verts[], uint flags )
687 void gr_opengl_gradient(int x1,int y1,int x2,int y2)
692 void gr_opengl_set_palette(ubyte *new_palette, int is_alphacolor)
697 void gr_opengl_get_color( int * r, int * g, int * b )
699 if (r) *r = gr_screen.current_color.red;
700 if (g) *g = gr_screen.current_color.green;
701 if (b) *b = gr_screen.current_color.blue;
706 void gr_opengl_init_color(color *c, int r, int g, int b)
708 gr_screen.current_color.screen_sig = gr_screen.signature;
709 gr_screen.current_color.red = (unsigned char)r;
710 gr_screen.current_color.green = (unsigned char)g;
711 gr_screen.current_color.blue = (unsigned char)b;
716 void gr_opengl_set_color_fast(color *dst)
718 if ( dst->screen_sig != gr_screen.signature ) {
719 gr_init_color( dst, dst->red, dst->green, dst->blue );
722 gr_screen.current_color = *dst;
727 void gr_opengl_print_screen(char *filename)
732 int gr_opengl_supports_res_ingame(int res)
739 int gr_opengl_supports_res_interface(int res)
746 void gr_opengl_cleanup()
748 if ( !Inited ) return;
757 void gr_opengl_fog_set(int fog_mode, int r, int g, int b, float near, float far)
762 void gr_opengl_get_pixel(int x, int y, int *r, int *g, int *b)
767 void gr_opengl_get_region(int front, int w, int g, ubyte *data)
772 void gr_opengl_set_cull(int cull)
777 void gr_opengl_filter_set(int filter)
783 void gr_opengl_cross_fade(int bmap1, int bmap2, int x1, int y1, int x2, int y2, float pct)
788 int gr_opengl_tcache_set(int bitmap_id, int bitmap_type, float *u_ratio, float *v_ratio, int fail_on_full = 0, int sx = -1, int sy = -1, int force = 0)
795 void gr_opengl_set_clear_color(int r, int g, int b)
800 void gr_opengl_aabitmap(int x, int y)
805 void gr_opengl_aabitmap_ex(int x,int y,int w,int h,int sx,int sy)
810 void gr_opengl_aaline(vertex *v1, vertex *v2)
815 void gr_opengl_init_alphacolor( color *clr, int r, int g, int b, int alpha, int type )
820 void gr_opengl_flash(int r, int g, int b)
825 int gr_opengl_zbuffer_get()
829 return GR_ZBUFF_NONE;
832 int gr_opengl_zbuffer_set(int mode)
836 return GR_ZBUFF_NONE;
839 void gr_opengl_zbuffer_clear(int mode)
844 void gr_opengl_set_gamma(float gamma)
849 void gr_opengl_fade_in(int instantaneous)
854 void gr_opengl_fade_out(int instantaneous)
859 int gr_opengl_save_screen()
866 void gr_opengl_restore_screen(int id)
871 void gr_opengl_free_screen(int id)
876 void gr_opengl_dump_frame_start(int first_frame, int frames_between_dumps)
881 void gr_opengl_dump_frame_stop()
886 void gr_opengl_dump_frame()
891 uint gr_opengl_lock()
898 void gr_opengl_unlock()
902 void gr_opengl_init()
909 mprintf(( "Initializing opengl graphics device...\n" ));
913 if (SDL_InitSubSystem (SDL_INIT_VIDEO) < 0)
915 fprintf (stderr, "Couldn't init SDL: %s", SDL_GetError());
921 if (SDL_SetVideoMode (640, 480, 16, SDL_OPENGL) == NULL)
923 fprintf (stderr, "Couldn't set video mode: %s", SDL_GetError ());
929 Gr_current_red = &Gr_red;
930 Gr_current_blue = &Gr_blue;
931 Gr_current_green = &Gr_green;
932 Gr_current_alpha = &Gr_alpha;
934 gr_screen.gf_flip = gr_opengl_flip;
935 gr_screen.gf_flip_window = gr_opengl_flip_window;
936 gr_screen.gf_set_clip = gr_opengl_set_clip;
937 gr_screen.gf_reset_clip = gr_opengl_reset_clip;
938 gr_screen.gf_set_font = gr_opengl_set_font;
940 gr_screen.gf_set_color = gr_opengl_set_color;
941 gr_screen.gf_set_bitmap = gr_opengl_set_bitmap;
942 gr_screen.gf_create_shader = gr_opengl_create_shader;
943 gr_screen.gf_set_shader = gr_opengl_set_shader;
944 gr_screen.gf_clear = gr_opengl_clear;
945 // gr_screen.gf_bitmap = gr_opengl_bitmap;
946 // gr_screen.gf_bitmap_ex = gr_opengl_bitmap_ex;
947 gr_screen.gf_aabitmap = gr_opengl_aabitmap;
948 gr_screen.gf_aabitmap_ex = gr_opengl_aabitmap_ex;
950 gr_screen.gf_rect = gr_opengl_rect;
951 gr_screen.gf_shade = gr_opengl_shade;
952 gr_screen.gf_string = gr_opengl_string;
953 gr_screen.gf_circle = gr_opengl_circle;
955 gr_screen.gf_line = gr_opengl_line;
956 gr_screen.gf_aaline = gr_opengl_aaline;
957 gr_screen.gf_pixel = gr_opengl_pixel;
958 gr_screen.gf_scaler = gr_opengl_scaler;
959 gr_screen.gf_tmapper = gr_opengl_tmapper;
961 gr_screen.gf_gradient = gr_opengl_gradient;
963 gr_screen.gf_set_palette = gr_opengl_set_palette;
964 gr_screen.gf_get_color = gr_opengl_get_color;
965 gr_screen.gf_init_color = gr_opengl_init_color;
966 gr_screen.gf_init_alphacolor = gr_opengl_init_alphacolor;
967 gr_screen.gf_set_color_fast = gr_opengl_set_color_fast;
968 gr_screen.gf_print_screen = gr_opengl_print_screen;
970 gr_screen.gf_fade_in = gr_opengl_fade_in;
971 gr_screen.gf_fade_out = gr_opengl_fade_out;
972 gr_screen.gf_flash = gr_opengl_flash;
974 gr_screen.gf_zbuffer_get = gr_opengl_zbuffer_get;
975 gr_screen.gf_zbuffer_set = gr_opengl_zbuffer_set;
976 gr_screen.gf_zbuffer_clear = gr_opengl_zbuffer_clear;
978 gr_screen.gf_save_screen = gr_opengl_save_screen;
979 gr_screen.gf_restore_screen = gr_opengl_restore_screen;
980 gr_screen.gf_free_screen = gr_opengl_free_screen;
982 gr_screen.gf_dump_frame_start = gr_opengl_dump_frame_start;
983 gr_screen.gf_dump_frame_stop = gr_opengl_dump_frame_stop;
984 gr_screen.gf_dump_frame = gr_opengl_dump_frame;
986 gr_screen.gf_set_gamma = gr_opengl_set_gamma;
988 gr_screen.gf_lock = gr_opengl_lock;
989 gr_screen.gf_unlock = gr_opengl_unlock;
991 gr_screen.gf_fog_set = gr_opengl_fog_set;
993 gr_screen.gf_get_region = gr_opengl_get_region;
995 gr_screen.gf_get_pixel = gr_opengl_get_pixel;
997 gr_screen.gf_set_cull = gr_opengl_set_cull;
999 gr_screen.gf_cross_fade = gr_opengl_cross_fade;
1001 gr_screen.gf_filter_set = gr_opengl_filter_set;
1003 gr_screen.gf_tcache_set = gr_opengl_tcache_set;
1005 gr_screen.gf_set_clear_color = gr_opengl_set_clear_color;