2 * $Logfile: /Freespace2/code/Graphics/GrOpenGL.cpp $
7 * Code that uses the OpenGL graphics library
10 * Revision 1.9 2002/05/29 03:35:51 relnev
13 * Revision 1.8 2002/05/29 03:30:05 relnev
16 * Revision 1.7 2002/05/29 02:52:32 theoddone33
17 * Enable OpenGL renderer
19 * Revision 1.6 2002/05/28 04:56:51 theoddone33
20 * runs a little bit now
22 * Revision 1.5 2002/05/28 04:07:28 theoddone33
23 * New graphics stubbing arrangement
25 * Revision 1.4 2002/05/27 23:39:34 relnev
28 * Revision 1.3 2002/05/27 22:35:01 theoddone33
31 * Revision 1.2 2002/05/27 22:32:02 theoddone33
32 * throw all d3d stuff at opengl
34 * Revision 1.1.1.1 2002/05/03 03:28:09 root
38 * 10 7/14/99 9:42a Dave
39 * Put in clear_color debug function. Put in base for 3dnow stuff / P3
42 * 9 7/09/99 9:51a Dave
43 * Added thick polyline code.
45 * 8 6/29/99 10:35a Dave
46 * Interface polygon bitmaps! Whee!
48 * 7 2/03/99 11:44a Dave
49 * Fixed d3d transparent textures.
51 * 6 1/24/99 11:37p Dave
52 * First full rev of beam weapons. Very customizable. Removed some bogus
53 * Int3()'s in low level net code.
55 * 5 12/18/98 1:13a Dave
56 * Rough 1024x768 support for Direct3D. Proper detection and usage through
59 * 4 12/06/98 2:36p Dave
60 * Drastically improved nebula fogging.
62 * 3 11/11/98 5:37p Dave
63 * Checkin for multiplayer testing.
65 * 2 10/07/98 10:53a Dave
68 * 1 10/07/98 10:49a Dave
70 * 14 5/20/98 9:46p John
71 * added code so the places in code that change half the palette don't
72 * have to clear the screen.
74 * 13 5/06/98 5:30p John
75 * Removed unused cfilearchiver. Removed/replaced some unused/little used
76 * graphics functions, namely gradient_h and _v and pixel_sp. Put in new
77 * DirectX header files and libs that fixed the Direct3D alpha blending
80 * 12 4/14/98 12:15p John
81 * Made 16-bpp movies work.
83 * 11 3/12/98 5:36p John
84 * Took out any unused shaders. Made shader code take rgbc instead of
85 * matrix and vector since noone used it like a matrix and it would have
86 * been impossible to do in hardware. Made Glide implement a basic
87 * shader for online help.
89 * 10 3/10/98 4:18p John
90 * Cleaned up graphics lib. Took out most unused gr functions. Made D3D
91 * & Glide have popups and print screen. Took out all >8bpp software
92 * support. Made Fred zbuffer. Made zbuffer allocate dynamically to
93 * support Fred. Made zbuffering key off of functions rather than one
96 * 9 12/02/97 4:00p John
97 * Added first rev of thruster glow, along with variable levels of
98 * translucency, which retquired some restructing of palman.
100 * 8 10/03/97 9:10a John
101 * added better antialiased line drawer
103 * 7 9/23/97 10:45a John
104 * made so you can tell bitblt code to rle a bitmap by passing flag to
107 * 6 9/09/97 11:01a Sandeep
108 * fixed warning level 4 bugs
110 * 5 7/10/97 2:06p John
111 * added code to specify alphablending type for bitmaps.
113 * 4 6/17/97 7:04p John
114 * added d3d support for gradients.
115 * fixed some color bugs by adding screen signatures instead of watching
116 * flags and palette changes.
118 * 3 6/12/97 2:50a Lawrance
119 * bm_unlock() now passed bitmap number, not pointer
121 * 2 6/11/97 1:12p John
122 * Started fixing all the text colors in the game.
124 * 1 5/12/97 12:14p John
131 #include <windowsx.h>
137 #include "floating.h"
139 #include "grinternal.h"
140 #include "gropengl.h"
143 static int Inited = 0;
145 // Throw in some dummy functions - DDOI
147 int D3D_32bit = 0; // grd3d.cpp
148 int D3D_fog_mode = -1; // grd3d.cpp
149 int D3D_inited = 0; // grd3d.cpp
150 int D3D_zbias = 1; // grd3d.cpp
151 int D3d_rendition_uvs = 0; // grd3d.cpp
153 void gr_dd_activate(int active) // grdirectdraw.cpp
158 void gr_directdraw_cleanup() // grdirectdraw.cpp
163 void gr_directdraw_force_windowed() // grdirectdraw.cpp
168 void gr_directdraw_init()
174 void gr_d3d_preload(int x, int y)
179 void d3d_start_frame()
184 void d3d_stop_frame()
194 void d3d_zbias (int a)
200 void gr_opengl_activate(int b)
205 void gr_opengl_preload_init()
210 void gr_opengl_pixel(int x, int y)
212 if ( x < gr_screen.clip_left ) return;
213 if ( x > gr_screen.clip_right ) return;
214 if ( y < gr_screen.clip_top ) return;
215 if ( y > gr_screen.clip_bottom ) return;
218 void gr_opengl_clear()
223 void gr_opengl_flip()
226 if (Inited) SDL_GL_SwapBuffers ();
230 void gr_opengl_flip_window(uint _hdc, int x, int y, int w, int h )
235 void gr_opengl_set_clip(int x,int y,int w,int h)
237 // check for sanity of parameters
243 if (x >= gr_screen.max_w)
244 x = gr_screen.max_w - 1;
245 if (y >= gr_screen.max_h)
246 y = gr_screen.max_h - 1;
248 if (x + w > gr_screen.max_w)
249 w = gr_screen.max_w - x;
250 if (y + h > gr_screen.max_h)
251 h = gr_screen.max_h - y;
253 if (w > gr_screen.max_w)
255 if (h > gr_screen.max_h)
258 gr_screen.offset_x = x;
259 gr_screen.offset_y = y;
260 gr_screen.clip_left = 0;
261 gr_screen.clip_right = w-1;
262 gr_screen.clip_top = 0;
263 gr_screen.clip_bottom = h-1;
264 gr_screen.clip_width = w;
265 gr_screen.clip_height = h;
270 void gr_opengl_reset_clip()
272 gr_screen.offset_x = 0;
273 gr_screen.offset_y = 0;
274 gr_screen.clip_left = 0;
275 gr_screen.clip_top = 0;
276 gr_screen.clip_right = gr_screen.max_w - 1;
277 gr_screen.clip_bottom = gr_screen.max_h - 1;
278 gr_screen.clip_width = gr_screen.max_w;
279 gr_screen.clip_height = gr_screen.max_h;
284 void gr_opengl_set_font(int fontnum)
289 void gr_opengl_set_color( int r, int g, int b )
291 Assert((r >= 0) && (r < 256));
292 Assert((g >= 0) && (g < 256));
293 Assert((b >= 0) && (b < 256));
295 gr_screen.current_color.red = (unsigned char)r;
296 gr_screen.current_color.green = (unsigned char)g;
297 gr_screen.current_color.blue = (unsigned char)b;
300 #warning STUB_FUNCTION: gr_opengl_set_color
303 void gr_opengl_set_bitmap( int bitmap_num, int alphablend_mode, int bitblt_mode, float alpha, int sx, int sy )
305 gr_screen.current_alpha = alpha;
306 gr_screen.current_alphablend_mode = alphablend_mode;
307 gr_screen.current_bitblt_mode = bitblt_mode;
308 gr_screen.current_bitmap = bitmap_num;
310 gr_screen.current_bitmap_sx = sx;
311 gr_screen.current_bitmap_sy = sy;
316 void gr_opengl_create_shader(shader * shade, float r, float g, float b, float c )
318 shade->screen_sig = gr_screen.signature;
327 void gr_opengl_set_shader( shader * shade )
330 if (shade->screen_sig != gr_screen.signature) {
331 gr_create_shader( shade, shade->r, shade->g, shade->b, shade->c );
333 gr_screen.current_shader = *shade;
335 gr_create_shader( &gr_screen.current_shader, 0.0f, 0.0f, 0.0f, 0.0f );
342 void gr_opengl_bitmap_ex(int x,int y,int w,int h,int sx,int sy)
348 bmp = bm_lock( gr_screen.current_bitmap, 8, 0 );
349 sptr = (ubyte *)( bmp->data + (sy*bmp->w+sx) );
351 // mprintf(( "x=%d, y=%d, w=%d, h=%d\n", x, y, w, h ));
352 // mprintf(( "sx=%d, sy=%d, bw=%d, bh=%d\n", sx, sy, bmp->w, bmp->h ));
354 for (i=0; i<h; i++ ) {
355 for ( j=0; j<w; j++ ) {
356 gr_set_color( gr_palette[sptr[j]*3+0], gr_palette[sptr[j]*3+1], gr_palette[sptr[j]*3+2] );
357 gr_pixel( x+j, i+y );
361 bm_unlock(gr_screen.current_bitmap);
366 void gr_opengl_bitmap(int x, int y)
370 bm_get_info( gr_screen.current_bitmap, &w, &h, NULL );
371 int dx1=x, dx2=x+w-1;
372 int dy1=y, dy2=y+h-1;
375 if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
376 if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
377 if ( dx1 < gr_screen.clip_left ) { sx = gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
378 if ( dy1 < gr_screen.clip_top ) { sy = gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
379 if ( dx2 > gr_screen.clip_right ) { dx2 = gr_screen.clip_right; }
380 if ( dy2 > gr_screen.clip_bottom ) { dy2 = gr_screen.clip_bottom; }
382 if ( sx < 0 ) return;
383 if ( sy < 0 ) return;
384 if ( sx >= w ) return;
385 if ( sy >= h ) return;
387 // Draw bitmap bm[sx,sy] into (dx1,dy1)-(dx2,dy2)
389 gr_bitmap_ex(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
392 static void opengl_scanline(int x1,int x2,int y)
397 void gr_opengl_rect(int x,int y,int w,int h)
432 opengl_scanline( x1, x2, y1+i );
438 void gr_opengl_shade(int x,int y,int w,int h)
443 void opengl_mtext(int x, int y, char *s, int len )
448 void gr_opengl_string(int x,int y,char * text)
455 p = strchr( p1, '\n' );
460 gr_get_string_size( &w, &h, p1 );
463 opengl_mtext(gr_screen.offset_x+(gr_screen.clip_width-w)/2,y+gr_screen.offset_y,p1,strlen(p1));
465 opengl_mtext(gr_screen.offset_x+x,y+gr_screen.offset_y,p1,strlen(p1));
468 if ( p1 && (strlen(p1) < 1) ) p1 = NULL;
476 void gr_opengl_circle( int xc, int yc, int d )
486 if ( (xc+r) < gr_screen.clip_left ) return;
487 if ( (xc-r) > gr_screen.clip_right ) return;
488 if ( (yc+r) < gr_screen.clip_top ) return;
489 if ( (yc-r) > gr_screen.clip_bottom ) return;
492 // Draw the first octant
493 opengl_scanline( xc-y, xc+y, yc-x );
494 opengl_scanline( xc-y, xc+y, yc+x );
499 // Draw the second octant
500 opengl_scanline( xc-x, xc+x, yc-y );
501 opengl_scanline( xc-x, xc+x, yc+y );
508 opengl_scanline( xc-x, xc+x, yc-y );
509 opengl_scanline( xc-x, xc+x, yc+y );
515 void gr_opengl_line(int x1,int y1,int x2,int y2)
522 int clipped = 0, swapped=0;
524 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);
542 for(i=dx+1;i>0;i--) {
554 for(i=dy+1;i>0;i--) {
570 #define FIND_SCALED_NUM(x,x0,x1,y0,y1) (((((x)-(x0))*((y1)-(y0)))/((x1)-(x0)))+(y0))
572 void gr_opengl_scaler(vertex *va, vertex *vb )
574 float x0, y0, x1, y1;
575 float u0, v0, u1, v1;
576 float clipped_x0, clipped_y0, clipped_x1, clipped_y1;
577 float clipped_u0, clipped_v0, clipped_u1, clipped_v1;
578 float xmin, xmax, ymin, ymax;
579 int dx0, dy0, dx1, dy1;
581 //============= CLIP IT =====================
583 x0 = va->sx; y0 = va->sy;
584 x1 = vb->sx; y1 = vb->sy;
586 xmin = i2fl(gr_screen.clip_left); ymin = i2fl(gr_screen.clip_top);
587 xmax = i2fl(gr_screen.clip_right); ymax = i2fl(gr_screen.clip_bottom);
589 u0 = va->u; v0 = va->v;
590 u1 = vb->u; v1 = vb->v;
592 // Check for obviously offscreen bitmaps...
593 if ( (y1<=y0) || (x1<=x0) ) return;
594 if ( (x1<xmin ) || (x0>xmax) ) return;
595 if ( (y1<ymin ) || (y0>ymax) ) return;
597 clipped_u0 = u0; clipped_v0 = v0;
598 clipped_u1 = u1; clipped_v1 = v1;
600 clipped_x0 = x0; clipped_y0 = y0;
601 clipped_x1 = x1; clipped_y1 = y1;
603 // Clip the left, moving u0 right as necessary
605 clipped_u0 = FIND_SCALED_NUM(xmin,x0,x1,u0,u1);
609 // Clip the right, moving u1 left as necessary
611 clipped_u1 = FIND_SCALED_NUM(xmax,x0,x1,u0,u1);
615 // Clip the top, moving v0 down as necessary
617 clipped_v0 = FIND_SCALED_NUM(ymin,y0,y1,v0,v1);
621 // Clip the bottom, moving v1 up as necessary
623 clipped_v1 = FIND_SCALED_NUM(ymax,y0,y1,v0,v1);
627 dx0 = fl2i(clipped_x0); dx1 = fl2i(clipped_x1);
628 dy0 = fl2i(clipped_y0); dy1 = fl2i(clipped_y1);
630 if (dx1<=dx0) return;
631 if (dy1<=dy0) return;
633 //============= DRAW IT =====================
641 tmpu = (clipped_u1-clipped_u0) / (dx1-dx0);
642 if ( fl_abs(tmpu) < 0.001f ) {
643 return; // scaled up way too far!
645 tmpv = (clipped_v1-clipped_v0) / (dy1-dy0);
646 if ( fl_abs(tmpv) < 0.001f ) {
647 return; // scaled up way too far!
650 bp = bm_lock( gr_screen.current_bitmap, 8, 0 );
652 du = fl2f(tmpu*(bp->w-1));
653 dv = fl2f(tmpv*(bp->h-1));
655 v = fl2f(clipped_v0*(bp->h-1));
656 u = fl2f(clipped_u0*(bp->w-1));
659 spixels = (ubyte *)bp->data;
661 for (y=dy0; y<=dy1; y++ ) {
662 sbits = &spixels[bp->rowsize*(v>>16)];
666 for (x=0; x<w; x++ ) {
667 ubyte c = sbits[ tmp_u >> 16 ];
669 gr_set_color( gr_palette[c*3+0], gr_palette[c*3+1], gr_palette[c*3+2] );
670 gr_pixel( x+dx0, y );
677 bm_unlock(gr_screen.current_bitmap);
684 void gr_opengl_tmapper( int nv, vertex * verts[], uint flags )
690 void gr_opengl_gradient(int x1,int y1,int x2,int y2)
695 void gr_opengl_set_palette(ubyte *new_palette, int is_alphacolor)
700 void gr_opengl_get_color( int * r, int * g, int * b )
702 if (r) *r = gr_screen.current_color.red;
703 if (g) *g = gr_screen.current_color.green;
704 if (b) *b = gr_screen.current_color.blue;
709 void gr_opengl_init_color(color *c, int r, int g, int b)
711 gr_screen.current_color.screen_sig = gr_screen.signature;
712 gr_screen.current_color.red = (unsigned char)r;
713 gr_screen.current_color.green = (unsigned char)g;
714 gr_screen.current_color.blue = (unsigned char)b;
719 void gr_opengl_set_color_fast(color *dst)
721 if ( dst->screen_sig != gr_screen.signature ) {
722 gr_init_color( dst, dst->red, dst->green, dst->blue );
725 gr_screen.current_color = *dst;
730 void gr_opengl_print_screen(char *filename)
735 int gr_opengl_supports_res_ingame(int res)
742 int gr_opengl_supports_res_interface(int res)
749 void gr_opengl_cleanup()
751 if ( !Inited ) return;
760 void gr_opengl_fog_set(int fog_mode, int r, int g, int b, float near, float far)
765 void gr_opengl_get_pixel(int x, int y, int *r, int *g, int *b)
770 void gr_opengl_get_region(int front, int w, int g, ubyte *data)
775 void gr_opengl_set_cull(int cull)
780 void gr_opengl_filter_set(int filter)
786 void gr_opengl_cross_fade(int bmap1, int bmap2, int x1, int y1, int x2, int y2, float pct)
791 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)
798 void gr_opengl_set_clear_color(int r, int g, int b)
803 void gr_opengl_aabitmap(int x, int y)
808 void gr_opengl_aabitmap_ex(int x,int y,int w,int h,int sx,int sy)
813 void gr_opengl_aaline(vertex *v1, vertex *v2)
818 void gr_opengl_init_alphacolor( color *clr, int r, int g, int b, int alpha, int type )
823 void gr_opengl_flash(int r, int g, int b)
828 int gr_opengl_zbuffer_get()
832 return GR_ZBUFF_NONE;
835 int gr_opengl_zbuffer_set(int mode)
839 return GR_ZBUFF_NONE;
842 void gr_opengl_zbuffer_clear(int mode)
847 void gr_opengl_set_gamma(float gamma)
852 void gr_opengl_fade_in(int instantaneous)
857 void gr_opengl_fade_out(int instantaneous)
862 int gr_opengl_save_screen()
869 void gr_opengl_restore_screen(int id)
874 void gr_opengl_free_screen(int id)
879 void gr_opengl_dump_frame_start(int first_frame, int frames_between_dumps)
884 void gr_opengl_dump_frame_stop()
889 void gr_opengl_dump_frame()
894 uint gr_opengl_lock()
901 void gr_opengl_unlock()
905 void gr_opengl_init()
912 mprintf(( "Initializing opengl graphics device...\n" ));
916 if (SDL_InitSubSystem (SDL_INIT_VIDEO) < 0)
918 fprintf (stderr, "Couldn't init SDL: %s", SDL_GetError());
924 SDL_GL_SetAttribute(SDL_GL_RED_SIZE, 5);
925 SDL_GL_SetAttribute(SDL_GL_GREEN_SIZE, 5);
926 SDL_GL_SetAttribute(SDL_GL_BLUE_SIZE, 5);
927 SDL_GL_SetAttribute(SDL_GL_DEPTH_SIZE, 16);
928 SDL_GL_SetAttribute(SDL_GL_DOUBLEBUFFER, 1);
930 if (SDL_SetVideoMode (640, 480, 0, SDL_OPENGL) == NULL)
932 fprintf (stderr, "Couldn't set video mode: %s", SDL_GetError ());
943 Gr_red.mask = 0xff0000;
948 Gr_green.mask = 0xff00;
959 Gr_red.mask = 0x7C00;
964 Gr_green.mask = 0x3E0;
977 Gr_red.mask = 0xF800;
982 Gr_green.mask = 0x7E0;
996 Gr_red.mask = 0xff0000;
1001 Gr_green.mask = 0xff00;
1006 Gr_blue.mask = 0xff;
1011 Int3(); // Illegal bpp
1017 Gr_current_red = &Gr_red;
1018 Gr_current_blue = &Gr_blue;
1019 Gr_current_green = &Gr_green;
1020 Gr_current_alpha = &Gr_alpha;
1022 gr_screen.gf_flip = gr_opengl_flip;
1023 gr_screen.gf_flip_window = gr_opengl_flip_window;
1024 gr_screen.gf_set_clip = gr_opengl_set_clip;
1025 gr_screen.gf_reset_clip = gr_opengl_reset_clip;
1026 gr_screen.gf_set_font = gr_opengl_set_font;
1028 gr_screen.gf_set_color = gr_opengl_set_color;
1029 gr_screen.gf_set_bitmap = gr_opengl_set_bitmap;
1030 gr_screen.gf_create_shader = gr_opengl_create_shader;
1031 gr_screen.gf_set_shader = gr_opengl_set_shader;
1032 gr_screen.gf_clear = gr_opengl_clear;
1033 // gr_screen.gf_bitmap = gr_opengl_bitmap;
1034 // gr_screen.gf_bitmap_ex = gr_opengl_bitmap_ex;
1035 gr_screen.gf_aabitmap = gr_opengl_aabitmap;
1036 gr_screen.gf_aabitmap_ex = gr_opengl_aabitmap_ex;
1038 gr_screen.gf_rect = gr_opengl_rect;
1039 gr_screen.gf_shade = gr_opengl_shade;
1040 gr_screen.gf_string = gr_opengl_string;
1041 gr_screen.gf_circle = gr_opengl_circle;
1043 gr_screen.gf_line = gr_opengl_line;
1044 gr_screen.gf_aaline = gr_opengl_aaline;
1045 gr_screen.gf_pixel = gr_opengl_pixel;
1046 gr_screen.gf_scaler = gr_opengl_scaler;
1047 gr_screen.gf_tmapper = gr_opengl_tmapper;
1049 gr_screen.gf_gradient = gr_opengl_gradient;
1051 gr_screen.gf_set_palette = gr_opengl_set_palette;
1052 gr_screen.gf_get_color = gr_opengl_get_color;
1053 gr_screen.gf_init_color = gr_opengl_init_color;
1054 gr_screen.gf_init_alphacolor = gr_opengl_init_alphacolor;
1055 gr_screen.gf_set_color_fast = gr_opengl_set_color_fast;
1056 gr_screen.gf_print_screen = gr_opengl_print_screen;
1058 gr_screen.gf_fade_in = gr_opengl_fade_in;
1059 gr_screen.gf_fade_out = gr_opengl_fade_out;
1060 gr_screen.gf_flash = gr_opengl_flash;
1062 gr_screen.gf_zbuffer_get = gr_opengl_zbuffer_get;
1063 gr_screen.gf_zbuffer_set = gr_opengl_zbuffer_set;
1064 gr_screen.gf_zbuffer_clear = gr_opengl_zbuffer_clear;
1066 gr_screen.gf_save_screen = gr_opengl_save_screen;
1067 gr_screen.gf_restore_screen = gr_opengl_restore_screen;
1068 gr_screen.gf_free_screen = gr_opengl_free_screen;
1070 gr_screen.gf_dump_frame_start = gr_opengl_dump_frame_start;
1071 gr_screen.gf_dump_frame_stop = gr_opengl_dump_frame_stop;
1072 gr_screen.gf_dump_frame = gr_opengl_dump_frame;
1074 gr_screen.gf_set_gamma = gr_opengl_set_gamma;
1076 gr_screen.gf_lock = gr_opengl_lock;
1077 gr_screen.gf_unlock = gr_opengl_unlock;
1079 gr_screen.gf_fog_set = gr_opengl_fog_set;
1081 gr_screen.gf_get_region = gr_opengl_get_region;
1083 gr_screen.gf_get_pixel = gr_opengl_get_pixel;
1085 gr_screen.gf_set_cull = gr_opengl_set_cull;
1087 gr_screen.gf_cross_fade = gr_opengl_cross_fade;
1089 gr_screen.gf_filter_set = gr_opengl_filter_set;
1091 gr_screen.gf_tcache_set = gr_opengl_tcache_set;
1093 gr_screen.gf_set_clear_color = gr_opengl_set_clear_color;