2 * $Logfile: /Freespace2/code/Graphics/GrOpenGL.cpp $
7 * Code that uses the OpenGL graphics library
10 * Revision 1.5 2002/05/28 04:07:28 theoddone33
11 * New graphics stubbing arrangement
13 * Revision 1.4 2002/05/27 23:39:34 relnev
16 * Revision 1.3 2002/05/27 22:35:01 theoddone33
19 * Revision 1.2 2002/05/27 22:32:02 theoddone33
20 * throw all d3d stuff at opengl
22 * Revision 1.1.1.1 2002/05/03 03:28:09 root
26 * 10 7/14/99 9:42a Dave
27 * Put in clear_color debug function. Put in base for 3dnow stuff / P3
30 * 9 7/09/99 9:51a Dave
31 * Added thick polyline code.
33 * 8 6/29/99 10:35a Dave
34 * Interface polygon bitmaps! Whee!
36 * 7 2/03/99 11:44a Dave
37 * Fixed d3d transparent textures.
39 * 6 1/24/99 11:37p Dave
40 * First full rev of beam weapons. Very customizable. Removed some bogus
41 * Int3()'s in low level net code.
43 * 5 12/18/98 1:13a Dave
44 * Rough 1024x768 support for Direct3D. Proper detection and usage through
47 * 4 12/06/98 2:36p Dave
48 * Drastically improved nebula fogging.
50 * 3 11/11/98 5:37p Dave
51 * Checkin for multiplayer testing.
53 * 2 10/07/98 10:53a Dave
56 * 1 10/07/98 10:49a Dave
58 * 14 5/20/98 9:46p John
59 * added code so the places in code that change half the palette don't
60 * have to clear the screen.
62 * 13 5/06/98 5:30p John
63 * Removed unused cfilearchiver. Removed/replaced some unused/little used
64 * graphics functions, namely gradient_h and _v and pixel_sp. Put in new
65 * DirectX header files and libs that fixed the Direct3D alpha blending
68 * 12 4/14/98 12:15p John
69 * Made 16-bpp movies work.
71 * 11 3/12/98 5:36p John
72 * Took out any unused shaders. Made shader code take rgbc instead of
73 * matrix and vector since noone used it like a matrix and it would have
74 * been impossible to do in hardware. Made Glide implement a basic
75 * shader for online help.
77 * 10 3/10/98 4:18p John
78 * Cleaned up graphics lib. Took out most unused gr functions. Made D3D
79 * & Glide have popups and print screen. Took out all >8bpp software
80 * support. Made Fred zbuffer. Made zbuffer allocate dynamically to
81 * support Fred. Made zbuffering key off of functions rather than one
84 * 9 12/02/97 4:00p John
85 * Added first rev of thruster glow, along with variable levels of
86 * translucency, which retquired some restructing of palman.
88 * 8 10/03/97 9:10a John
89 * added better antialiased line drawer
91 * 7 9/23/97 10:45a John
92 * made so you can tell bitblt code to rle a bitmap by passing flag to
95 * 6 9/09/97 11:01a Sandeep
96 * fixed warning level 4 bugs
98 * 5 7/10/97 2:06p John
99 * added code to specify alphablending type for bitmaps.
101 * 4 6/17/97 7:04p John
102 * added d3d support for gradients.
103 * fixed some color bugs by adding screen signatures instead of watching
104 * flags and palette changes.
106 * 3 6/12/97 2:50a Lawrance
107 * bm_unlock() now passed bitmap number, not pointer
109 * 2 6/11/97 1:12p John
110 * Started fixing all the text colors in the game.
112 * 1 5/12/97 12:14p John
119 #include <windowsx.h>
125 #include "floating.h"
127 #include "grinternal.h"
128 #include "gropengl.h"
131 static int Inited = 0;
133 // Throw in some dummy functions - DDOI
135 int D3D_32bit = 0; // grd3d.cpp
136 int D3D_fog_mode = -1; // grd3d.cpp
137 int D3D_inited = 0; // grd3d.cpp
138 int D3D_zbias = 1; // grd3d.cpp
139 int D3d_rendition_uvs = 0; // grd3d.cpp
141 void gr_dd_activate(int active) // grdirectdraw.cpp
146 void gr_directdraw_cleanup() // grdirectdraw.cpp
151 void gr_directdraw_force_windowed() // grdirectdraw.cpp
156 void gr_directdraw_init()
161 void gr_opengl_preload_init()
166 void gr_d3d_preload(int x, int y)
171 void gr_opengl_activate(int b)
181 void d3d_zbias (int a)
187 void gr_opengl_pixel(int x, int y)
189 if ( x < gr_screen.clip_left ) return;
190 if ( x > gr_screen.clip_right ) return;
191 if ( y < gr_screen.clip_top ) return;
192 if ( y > gr_screen.clip_bottom ) return;
195 void gr_opengl_clear()
200 void gr_opengl_flip()
204 void gr_opengl_flip_window(uint _hdc, int x, int y, int w, int h )
208 void gr_opengl_set_clip(int x,int y,int w,int h)
210 // check for sanity of parameters
216 if (x >= gr_screen.max_w)
217 x = gr_screen.max_w - 1;
218 if (y >= gr_screen.max_h)
219 y = gr_screen.max_h - 1;
221 if (x + w > gr_screen.max_w)
222 w = gr_screen.max_w - x;
223 if (y + h > gr_screen.max_h)
224 h = gr_screen.max_h - y;
226 if (w > gr_screen.max_w)
228 if (h > gr_screen.max_h)
231 gr_screen.offset_x = x;
232 gr_screen.offset_y = y;
233 gr_screen.clip_left = 0;
234 gr_screen.clip_right = w-1;
235 gr_screen.clip_top = 0;
236 gr_screen.clip_bottom = h-1;
237 gr_screen.clip_width = w;
238 gr_screen.clip_height = h;
241 void gr_opengl_reset_clip()
243 gr_screen.offset_x = 0;
244 gr_screen.offset_y = 0;
245 gr_screen.clip_left = 0;
246 gr_screen.clip_top = 0;
247 gr_screen.clip_right = gr_screen.max_w - 1;
248 gr_screen.clip_bottom = gr_screen.max_h - 1;
249 gr_screen.clip_width = gr_screen.max_w;
250 gr_screen.clip_height = gr_screen.max_h;
253 void gr_opengl_set_font(int fontnum)
257 void gr_opengl_set_color( int r, int g, int b )
259 Assert((r >= 0) && (r < 256));
260 Assert((g >= 0) && (g < 256));
261 Assert((b >= 0) && (b < 256));
263 gr_screen.current_color.red = (unsigned char)r;
264 gr_screen.current_color.green = (unsigned char)g;
265 gr_screen.current_color.blue = (unsigned char)b;
268 void gr_opengl_set_bitmap( int bitmap_num, int alphablend_mode, int bitblt_mode, float alpha, int sx, int sy )
270 gr_screen.current_alpha = alpha;
271 gr_screen.current_alphablend_mode = alphablend_mode;
272 gr_screen.current_bitblt_mode = bitblt_mode;
273 gr_screen.current_bitmap = bitmap_num;
275 gr_screen.current_bitmap_sx = sx;
276 gr_screen.current_bitmap_sy = sy;
279 void gr_opengl_create_shader(shader * shade, float r, float g, float b, float c )
281 shade->screen_sig = gr_screen.signature;
288 void gr_opengl_set_shader( shader * shade )
291 if (shade->screen_sig != gr_screen.signature) {
292 gr_create_shader( shade, shade->r, shade->g, shade->b, shade->c );
294 gr_screen.current_shader = *shade;
296 gr_create_shader( &gr_screen.current_shader, 0.0f, 0.0f, 0.0f, 0.0f );
301 void gr_opengl_bitmap_ex(int x,int y,int w,int h,int sx,int sy)
307 bmp = bm_lock( gr_screen.current_bitmap, 8, 0 );
308 sptr = (ubyte *)( bmp->data + (sy*bmp->w+sx) );
310 // mprintf(( "x=%d, y=%d, w=%d, h=%d\n", x, y, w, h ));
311 // mprintf(( "sx=%d, sy=%d, bw=%d, bh=%d\n", sx, sy, bmp->w, bmp->h ));
313 for (i=0; i<h; i++ ) {
314 for ( j=0; j<w; j++ ) {
315 gr_set_color( gr_palette[sptr[j]*3+0], gr_palette[sptr[j]*3+1], gr_palette[sptr[j]*3+2] );
316 gr_pixel( x+j, i+y );
320 bm_unlock(gr_screen.current_bitmap);
323 void gr_opengl_bitmap(int x, int y)
327 bm_get_info( gr_screen.current_bitmap, &w, &h, NULL );
328 int dx1=x, dx2=x+w-1;
329 int dy1=y, dy2=y+h-1;
332 if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
333 if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
334 if ( dx1 < gr_screen.clip_left ) { sx = gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
335 if ( dy1 < gr_screen.clip_top ) { sy = gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
336 if ( dx2 > gr_screen.clip_right ) { dx2 = gr_screen.clip_right; }
337 if ( dy2 > gr_screen.clip_bottom ) { dy2 = gr_screen.clip_bottom; }
339 if ( sx < 0 ) return;
340 if ( sy < 0 ) return;
341 if ( sx >= w ) return;
342 if ( sy >= h ) return;
344 // Draw bitmap bm[sx,sy] into (dx1,dy1)-(dx2,dy2)
346 gr_bitmap_ex(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
349 static void opengl_scanline(int x1,int x2,int y)
353 void gr_opengl_rect(int x,int y,int w,int h)
388 opengl_scanline( x1, x2, y1+i );
392 void gr_opengl_shade(int x,int y,int w,int h)
396 void opengl_mtext(int x, int y, char *s, int len )
400 void gr_opengl_string(int x,int y,char * text)
407 p = strchr( p1, '\n' );
412 gr_get_string_size( &w, &h, p1 );
415 opengl_mtext(gr_screen.offset_x+(gr_screen.clip_width-w)/2,y+gr_screen.offset_y,p1,strlen(p1));
417 opengl_mtext(gr_screen.offset_x+x,y+gr_screen.offset_y,p1,strlen(p1));
420 if ( p1 && (strlen(p1) < 1) ) p1 = NULL;
428 void gr_opengl_circle( int xc, int yc, int d )
438 if ( (xc+r) < gr_screen.clip_left ) return;
439 if ( (xc-r) > gr_screen.clip_right ) return;
440 if ( (yc+r) < gr_screen.clip_top ) return;
441 if ( (yc-r) > gr_screen.clip_bottom ) return;
444 // Draw the first octant
445 opengl_scanline( xc-y, xc+y, yc-x );
446 opengl_scanline( xc-y, xc+y, yc+x );
451 // Draw the second octant
452 opengl_scanline( xc-x, xc+x, yc-y );
453 opengl_scanline( xc-x, xc+x, yc+y );
460 opengl_scanline( xc-x, xc+x, yc-y );
461 opengl_scanline( xc-x, xc+x, yc+y );
467 void gr_opengl_line(int x1,int y1,int x2,int y2)
474 int clipped = 0, swapped=0;
476 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);
494 for(i=dx+1;i>0;i--) {
506 for(i=dy+1;i>0;i--) {
520 #define FIND_SCALED_NUM(x,x0,x1,y0,y1) (((((x)-(x0))*((y1)-(y0)))/((x1)-(x0)))+(y0))
522 void gr_opengl_scaler(vertex *va, vertex *vb )
524 float x0, y0, x1, y1;
525 float u0, v0, u1, v1;
526 float clipped_x0, clipped_y0, clipped_x1, clipped_y1;
527 float clipped_u0, clipped_v0, clipped_u1, clipped_v1;
528 float xmin, xmax, ymin, ymax;
529 int dx0, dy0, dx1, dy1;
531 //============= CLIP IT =====================
533 x0 = va->sx; y0 = va->sy;
534 x1 = vb->sx; y1 = vb->sy;
536 xmin = i2fl(gr_screen.clip_left); ymin = i2fl(gr_screen.clip_top);
537 xmax = i2fl(gr_screen.clip_right); ymax = i2fl(gr_screen.clip_bottom);
539 u0 = va->u; v0 = va->v;
540 u1 = vb->u; v1 = vb->v;
542 // Check for obviously offscreen bitmaps...
543 if ( (y1<=y0) || (x1<=x0) ) return;
544 if ( (x1<xmin ) || (x0>xmax) ) return;
545 if ( (y1<ymin ) || (y0>ymax) ) return;
547 clipped_u0 = u0; clipped_v0 = v0;
548 clipped_u1 = u1; clipped_v1 = v1;
550 clipped_x0 = x0; clipped_y0 = y0;
551 clipped_x1 = x1; clipped_y1 = y1;
553 // Clip the left, moving u0 right as necessary
555 clipped_u0 = FIND_SCALED_NUM(xmin,x0,x1,u0,u1);
559 // Clip the right, moving u1 left as necessary
561 clipped_u1 = FIND_SCALED_NUM(xmax,x0,x1,u0,u1);
565 // Clip the top, moving v0 down as necessary
567 clipped_v0 = FIND_SCALED_NUM(ymin,y0,y1,v0,v1);
571 // Clip the bottom, moving v1 up as necessary
573 clipped_v1 = FIND_SCALED_NUM(ymax,y0,y1,v0,v1);
577 dx0 = fl2i(clipped_x0); dx1 = fl2i(clipped_x1);
578 dy0 = fl2i(clipped_y0); dy1 = fl2i(clipped_y1);
580 if (dx1<=dx0) return;
581 if (dy1<=dy0) return;
583 //============= DRAW IT =====================
591 tmpu = (clipped_u1-clipped_u0) / (dx1-dx0);
592 if ( fl_abs(tmpu) < 0.001f ) {
593 return; // scaled up way too far!
595 tmpv = (clipped_v1-clipped_v0) / (dy1-dy0);
596 if ( fl_abs(tmpv) < 0.001f ) {
597 return; // scaled up way too far!
600 bp = bm_lock( gr_screen.current_bitmap, 8, 0 );
602 du = fl2f(tmpu*(bp->w-1));
603 dv = fl2f(tmpv*(bp->h-1));
605 v = fl2f(clipped_v0*(bp->h-1));
606 u = fl2f(clipped_u0*(bp->w-1));
609 spixels = (ubyte *)bp->data;
611 for (y=dy0; y<=dy1; y++ ) {
612 sbits = &spixels[bp->rowsize*(v>>16)];
616 for (x=0; x<w; x++ ) {
617 ubyte c = sbits[ tmp_u >> 16 ];
619 gr_set_color( gr_palette[c*3+0], gr_palette[c*3+1], gr_palette[c*3+2] );
620 gr_pixel( x+dx0, y );
627 bm_unlock(gr_screen.current_bitmap);
633 void gr_opengl_tmapper( int nv, vertex * verts[], uint flags )
638 void gr_opengl_gradient(int x1,int y1,int x2,int y2)
642 void gr_opengl_set_palette(ubyte *new_palette, int is_alphacolor)
646 void gr_opengl_get_color( int * r, int * g, int * b )
648 if (r) *r = gr_screen.current_color.red;
649 if (g) *g = gr_screen.current_color.green;
650 if (b) *b = gr_screen.current_color.blue;
653 void gr_opengl_init_color(color *c, int r, int g, int b)
655 gr_screen.current_color.screen_sig = gr_screen.signature;
656 gr_screen.current_color.red = (unsigned char)r;
657 gr_screen.current_color.green = (unsigned char)g;
658 gr_screen.current_color.blue = (unsigned char)b;
661 void gr_opengl_set_color_fast(color *dst)
663 if ( dst->screen_sig != gr_screen.signature ) {
664 gr_init_color( dst, dst->red, dst->green, dst->blue );
667 gr_screen.current_color = *dst;
672 void gr_opengl_print_screen(char *filename)
677 int gr_opengl_supports_res_ingame(int res)
682 int gr_opengl_supports_res_interface(int res)
687 void gr_opengl_cleanup()
689 if ( !Inited ) return;
698 void gr_opengl_fog_set(int fog_mode, int r, int g, int b, float near, float far)
702 void gr_opengl_get_pixel(int x, int y, int *r, int *g, int *b)
706 void gr_opengl_get_region(int front, int w, int g, ubyte *data)
710 void gr_opengl_set_cull(int cull)
714 void gr_opengl_filter_set(int filter)
719 void gr_opengl_cross_fade(int bmap1, int bmap2, int x1, int y1, int x2, int y2, float pct)
723 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)
728 void gr_opengl_set_clear_color(int r, int g, int b)
732 void gr_opengl_init()
739 mprintf(( "Initializing opengl graphics device...\n" ));
744 gr_screen.gf_flip = gr_opengl_flip;
745 gr_screen.gf_flip_window = gr_opengl_flip_window;
746 gr_screen.gf_set_clip = gr_opengl_set_clip;
747 gr_screen.gf_reset_clip = gr_opengl_reset_clip;
748 gr_screen.gf_set_font = gr_opengl_set_font;
749 gr_screen.gf_set_color = gr_opengl_set_color;
750 gr_screen.gf_set_bitmap = gr_opengl_set_bitmap;
751 gr_screen.gf_create_shader = gr_opengl_create_shader;
752 gr_screen.gf_set_shader = gr_opengl_set_shader;
753 gr_screen.gf_clear = gr_opengl_clear;
754 // gr_screen.gf_bitmap = gr_opengl_bitmap;
755 // gr_screen.gf_bitmap_ex = gr_opengl_bitmap_ex;
756 gr_screen.gf_rect = gr_opengl_rect;
757 gr_screen.gf_shade = gr_opengl_shade;
758 gr_screen.gf_string = gr_opengl_string;
759 gr_screen.gf_circle = gr_opengl_circle;
761 gr_screen.gf_line = gr_opengl_line;
762 gr_screen.gf_pixel = gr_opengl_pixel;
763 gr_screen.gf_scaler = gr_opengl_scaler;
764 gr_screen.gf_tmapper = gr_opengl_tmapper;
766 gr_screen.gf_gradient = gr_opengl_gradient;
768 gr_screen.gf_set_palette = gr_opengl_set_palette;
769 gr_screen.gf_get_color = gr_opengl_get_color;
770 gr_screen.gf_init_color = gr_opengl_init_color;
771 gr_screen.gf_set_color_fast = gr_opengl_set_color_fast;
772 gr_screen.gf_print_screen = gr_opengl_print_screen;
774 gr_screen.gf_fog_set = gr_opengl_fog_set;
776 gr_screen.gf_get_region = gr_opengl_get_region;
778 gr_screen.gf_get_pixel = gr_opengl_get_pixel;
780 gr_screen.gf_set_cull = gr_opengl_set_cull;
782 gr_screen.gf_cross_fade = gr_opengl_cross_fade;
784 gr_screen.gf_filter_set = gr_opengl_filter_set;
786 gr_screen.gf_tcache_set = gr_opengl_tcache_set;
788 gr_screen.gf_set_clear_color = gr_opengl_set_clear_color;