2 * Copyright (C) Volition, Inc. 1999. All rights reserved.
4 * All source code herein is the property of Volition, Inc. You may not sell
5 * or otherwise commercially exploit the source or things you created based on
12 #include "gropengl1.h"
13 #include "gropenglinternal.h"
15 #include "grinternal.h"
22 extern int OGL_fog_mode;
24 #define NEBULA_COLORS 20
27 static void opengl1_rect_internal(int x, int y, int w, int h, int r, int g, int b, int a)
31 vertex *verts[4] = {&v[0], &v[1], &v[2], &v[3]};
33 saved_zbuf = gr_zbuffer_get();
35 // start the frame, no zbuffering, no culling
37 gr_zbuffer_set(GR_ZBUFF_NONE);
46 v[0].flags = PF_PROJECTED;
53 v[1].sx = i2fl(x + w);
58 v[1].flags = PF_PROJECTED;
65 v[2].sx = i2fl(x + w);
66 v[2].sy = i2fl(y + h);
70 v[2].flags = PF_PROJECTED;
78 v[3].sy = i2fl(y + h);
82 v[3].flags = PF_PROJECTED;
90 g3_draw_poly_constant_sw(4, verts, TMAP_FLAG_GOURAUD | TMAP_FLAG_RGB | TMAP_FLAG_ALPHA, 0.1f);
94 // restore zbuffer and culling
95 gr_zbuffer_set(saved_zbuf);
99 static void opengl1_aabitmap_ex_internal(int x,int y,int w,int h,int sx,int sy)
101 if ( (w < 1) || (h < 1) ) {
105 if ( !gr_screen.current_color.is_alphacolor ) {
109 float u_scale, v_scale;
111 if ( !opengl1_tcache_set(gr_screen.current_bitmap, TCACHE_TYPE_AABITMAP,
112 &u_scale, &v_scale, 0, -1, -1, 0) )
114 // Couldn't set texture
115 mprintf(( "WARNING: Error setting aabitmap texture!\n" ));
119 opengl1_set_state( TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
121 float u0, u1, v0, v1;
122 float x1, x2, y1, y2;
125 bm_get_info( gr_screen.current_bitmap, &bw, &bh );
127 u0 = u_scale*i2fl(sx)/i2fl(bw);
128 v0 = v_scale*i2fl(sy)/i2fl(bh);
130 u1 = u_scale*i2fl(sx+w)/i2fl(bw);
131 v1 = v_scale*i2fl(sy+h)/i2fl(bh);
133 x1 = i2fl(x+gr_screen.offset_x);
134 y1 = i2fl(y+gr_screen.offset_y);
135 x2 = i2fl(x+w+gr_screen.offset_x);
136 y2 = i2fl(y+h+gr_screen.offset_y);
138 glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
139 gr_screen.current_color.blue,gr_screen.current_color.alpha);
141 opengl_alloc_render_buffer(4);
143 render_buffer[0].x = x1;
144 render_buffer[0].y = y2;
145 render_buffer[0].u = u0;
146 render_buffer[0].v = v1;
148 render_buffer[1].x = x2;
149 render_buffer[1].y = y2;
150 render_buffer[1].u = u1;
151 render_buffer[1].v = v1;
153 render_buffer[2].x = x2;
154 render_buffer[2].y = y1;
155 render_buffer[2].u = u1;
156 render_buffer[2].v = v0;
158 render_buffer[3].x = x1;
159 render_buffer[3].y = y1;
160 render_buffer[3].u = u0;
161 render_buffer[3].v = v0;
163 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
164 glEnableClientState(GL_VERTEX_ARRAY);
166 glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
167 glVertexPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
169 glDrawArrays(GL_QUADS, 0, 4);
171 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
172 glDisableClientState(GL_VERTEX_ARRAY);
175 static void opengl1_stuff_fog_value(float z, float *f_val)
183 f_float = 1.0f - ((gr_screen.fog_far - z) / (gr_screen.fog_far - gr_screen.fog_near));
185 if (f_float < 0.0f) {
187 } else if (f_float > 1.0f) {
194 static void opengl1_tmapper_internal( int nv, vertex ** verts, uint flags, int is_scaler )
197 float u_scale = 1.0f, v_scale = 1.0f;
199 // Make nebula use the texture mapper... this blends the colors better.
200 if ( flags & TMAP_FLAG_NEBULA ){
204 gr_texture_source texture_source = (gr_texture_source)-1;
205 gr_alpha_blend alpha_blend = (gr_alpha_blend)-1;
206 gr_zbuffer_type zbuffer_type = (gr_zbuffer_type)-1;
209 if ( is_scaler || (gr_screen.current_alphablend_mode == GR_ALPHABLEND_FILTER) ) {
210 zbuffer_type = ZBUFFER_TYPE_READ;
212 zbuffer_type = ZBUFFER_TYPE_FULL;
215 zbuffer_type = ZBUFFER_TYPE_NONE;
220 int tmap_type = TCACHE_TYPE_NORMAL;
224 if ( flags & TMAP_FLAG_TEXTURED ) {
227 r = gr_screen.current_color.red;
228 g = gr_screen.current_color.green;
229 b = gr_screen.current_color.blue;
232 if (gr_screen.current_alphablend_mode == GR_ALPHABLEND_FILTER) {
233 tmap_type = TCACHE_TYPE_NORMAL;
234 alpha_blend = ALPHA_BLEND_ALPHA_ADDITIVE;
236 // Blend with screen pixel using src*alpha+dst
240 if (gr_screen.current_alpha <= 1.0f) {
241 r = fl2i((r * gr_screen.current_alpha) + 0.5f);
242 g = fl2i((g * gr_screen.current_alpha) + 0.5f);
243 b = fl2i((b * gr_screen.current_alpha) + 0.5f);
246 alpha_blend = ALPHA_BLEND_ALPHA_BLEND_ALPHA;
250 if (flags & TMAP_FLAG_BITMAP_SECTION) {
251 Assert( !(flags & TMAP_FLAG_BITMAP_INTERFACE) );
252 tmap_type = TCACHE_TYPE_BITMAP_SECTION;
253 } else if (flags & TMAP_FLAG_BITMAP_INTERFACE) {
254 Assert( !(flags & TMAP_FLAG_BITMAP_SECTION) );
255 tmap_type = TCACHE_TYPE_BITMAP_INTERFACE;
258 texture_source = TEXTURE_SOURCE_NONE;
260 if (flags & TMAP_FLAG_TEXTURED) {
261 if ( !opengl1_tcache_set(gr_screen.current_bitmap, tmap_type, &u_scale,
262 &v_scale, 0, gr_screen.current_bitmap_sx, gr_screen.current_bitmap_sy, 0) )
264 mprintf(( "Not rendering a texture because it didn't fit in VRAM!\n" ));
268 // use non-filtered textures for bitmap sections and UI graphics
270 case TCACHE_TYPE_BITMAP_INTERFACE:
271 case TCACHE_TYPE_BITMAP_SECTION:
272 texture_source = TEXTURE_SOURCE_NO_FILTERING;
276 texture_source = TEXTURE_SOURCE_DECAL;
282 opengl1_set_state( texture_source, alpha_blend, zbuffer_type );
284 float fr = 1.0f, fg = 1.0f, fb = 1.0f;
286 if (flags & TMAP_FLAG_PIXEL_FOG) {
292 for (i=nv-1;i>=0;i--) // DDOI - change polygon winding
294 vertex * va = verts[i];
298 x = fl2i(va->sx*16.0f);
299 y = fl2i(va->sy*16.0f);
301 x += gr_screen.offset_x*16;
302 y += gr_screen.offset_y*16;
304 sx = i2fl(x) / 16.0f;
305 sy = i2fl(y) / 16.0f;
307 neb2_get_pixel((int)sx, (int)sy, &r, &g, &b);
318 gr_fog_set(GR_FOGMODE_FOG, ra, ga, ba, -1.0f, -1.0f);
325 opengl_alloc_render_buffer(nv);
329 for (i = nv-1; i >= 0; i--) {
330 vertex * va = verts[i];
335 if ( Gr_zbuffering || (flags & TMAP_FLAG_NEBULA) ) {
336 sz = 1.0 - 1.0 / (1.0 + va->z / (32768.0 / 256.0));
345 if ( flags & TMAP_FLAG_CORRECT ) {
349 if (flags & TMAP_FLAG_ALPHA) {
355 if (flags & TMAP_FLAG_NEBULA ) {
356 int pal = (verts[i]->b*(NEBULA_COLORS-1))/255;
357 r = gr_palette[pal*3+0];
358 g = gr_palette[pal*3+1];
359 b = gr_palette[pal*3+2];
360 } else if ( (flags & TMAP_FLAG_RAMP) && (flags & TMAP_FLAG_GOURAUD) ) {
361 r = Gr_gamma_lookup[verts[i]->b];
362 g = Gr_gamma_lookup[verts[i]->b];
363 b = Gr_gamma_lookup[verts[i]->b];
364 } else if ( (flags & TMAP_FLAG_RGB) && (flags & TMAP_FLAG_GOURAUD) ) {
365 // Make 0.75 be 256.0f
366 r = Gr_gamma_lookup[verts[i]->r];
367 g = Gr_gamma_lookup[verts[i]->g];
368 b = Gr_gamma_lookup[verts[i]->b];
370 // use constant RGB values...
373 render_buffer[rb_offset].r = r;
374 render_buffer[rb_offset].g = g;
375 render_buffer[rb_offset].b = b;
376 render_buffer[rb_offset].a = a;
378 if ( (gr_screen.current_fog_mode != GR_FOGMODE_NONE) && (OGL_fog_mode == 1) ) {
381 opengl1_stuff_fog_value(va->z, &f_val);
383 render_buffer[rb_offset].sr = fl2i(((fr * f_val) * 255.0f) + 0.5f);
384 render_buffer[rb_offset].sg = fl2i(((fg * f_val) * 255.0f) + 0.5f);
385 render_buffer[rb_offset].sb = fl2i(((fb * f_val) * 255.0f) + 0.5f);
389 x = fl2i(va->sx*16.0f);
390 y = fl2i(va->sy*16.0f);
392 x += gr_screen.offset_x*16;
393 y += gr_screen.offset_y*16;
395 sx = i2fl(x) / 16.0f;
396 sy = i2fl(y) / 16.0f;
398 if ( flags & TMAP_FLAG_TEXTURED ) {
399 render_buffer[rb_offset].u = va->u * u_scale;
400 render_buffer[rb_offset].v = va->v * v_scale;
403 render_buffer[rb_offset].x = sx * rhw;
404 render_buffer[rb_offset].y = sy * rhw;
405 render_buffer[rb_offset].z = -sz * rhw;
406 render_buffer[rb_offset].w = rhw;
411 if (flags & TMAP_FLAG_TEXTURED) {
412 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
413 glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
416 if ( (gr_screen.current_fog_mode != GR_FOGMODE_NONE) && (OGL_fog_mode == 1) ) {
417 glEnableClientState(GL_SECONDARY_COLOR_ARRAY);
418 vglSecondaryColorPointer(3, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].sr);
421 glEnableClientState(GL_COLOR_ARRAY);
422 glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].r);
424 glEnableClientState(GL_VERTEX_ARRAY);
425 glVertexPointer(4, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
427 glDrawArrays(GL_TRIANGLE_FAN, 0, rb_offset);
429 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
430 glDisableClientState(GL_SECONDARY_COLOR_ARRAY);
431 glDisableClientState(GL_COLOR_ARRAY);
432 glDisableClientState(GL_VERTEX_ARRAY);
435 void gr_opengl1_rect(int x,int y,int w,int h)
437 opengl1_rect_internal(x, y, w, h, gr_screen.current_color.red,
438 gr_screen.current_color.green, gr_screen.current_color.blue,
439 gr_screen.current_color.alpha);
442 void gr_opengl1_shade(int x,int y,int w,int h)
449 r = fl2i(gr_screen.current_shader.r*255.0f*shade1);
450 if ( r < 0 ) r = 0; else if ( r > 255 ) r = 255;
451 g = fl2i(gr_screen.current_shader.g*255.0f*shade1);
452 if ( g < 0 ) g = 0; else if ( g > 255 ) g = 255;
453 b = fl2i(gr_screen.current_shader.b*255.0f*shade1);
454 if ( b < 0 ) b = 0; else if ( b > 255 ) b = 255;
455 a = fl2i(gr_screen.current_shader.c*255.0f*shade2);
456 if ( a < 0 ) a = 0; else if ( a > 255 ) a = 255;
458 opengl1_rect_internal(x, y, w, h, r, g, b, a);
461 void gr_opengl1_aabitmap_ex(int x,int y,int w,int h,int sx,int sy)
468 int dx1=x, dx2=x+w-1;
469 int dy1=y, dy2=y+h-1;
472 bm_get_info( gr_screen.current_bitmap, &bw, &bh, NULL );
477 if ( count > 1 ) Int3();
481 if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
482 if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
483 if ( dx1 < gr_screen.clip_left ) { sx += gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
484 if ( dy1 < gr_screen.clip_top ) { sy += gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
485 if ( dx2 > gr_screen.clip_right ) { dx2 = gr_screen.clip_right; }
486 if ( dy2 > gr_screen.clip_bottom ) { dy2 = gr_screen.clip_bottom; }
513 if ( w < 1 ) return; // clipped away!
514 if ( h < 1 ) return; // clipped away!
518 // Make sure clipping algorithm works
522 Assert( w == (dx2-dx1+1) );
523 Assert( h == (dy2-dy1+1) );
526 Assert( sx+w <= bw );
527 Assert( sy+h <= bh );
528 Assert( dx2 >= dx1 );
529 Assert( dy2 >= dy1 );
530 Assert( (dx1 >= gr_screen.clip_left ) && (dx1 <= gr_screen.clip_right) );
531 Assert( (dx2 >= gr_screen.clip_left ) && (dx2 <= gr_screen.clip_right) );
532 Assert( (dy1 >= gr_screen.clip_top ) && (dy1 <= gr_screen.clip_bottom) );
533 Assert( (dy2 >= gr_screen.clip_top ) && (dy2 <= gr_screen.clip_bottom) );
536 // We now have dx1,dy1 and dx2,dy2 and sx, sy all set validly within clip regions.
537 opengl1_aabitmap_ex_internal(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
540 void gr_opengl1_aabitmap(int x, int y)
544 bm_get_info( gr_screen.current_bitmap, &w, &h, NULL );
545 int dx1=x, dx2=x+w-1;
546 int dy1=y, dy2=y+h-1;
549 if ((dx1 > gr_screen.clip_right ) || (dx2 < gr_screen.clip_left)) return;
550 if ((dy1 > gr_screen.clip_bottom ) || (dy2 < gr_screen.clip_top)) return;
551 if ( dx1 < gr_screen.clip_left ) { sx = gr_screen.clip_left-dx1; dx1 = gr_screen.clip_left; }
552 if ( dy1 < gr_screen.clip_top ) { sy = gr_screen.clip_top-dy1; dy1 = gr_screen.clip_top; }
553 if ( dx2 > gr_screen.clip_right ) { dx2 = gr_screen.clip_right; }
554 if ( dy2 > gr_screen.clip_bottom ) { dy2 = gr_screen.clip_bottom; }
556 if ( sx < 0 ) return;
557 if ( sy < 0 ) return;
558 if ( sx >= w ) return;
559 if ( sy >= h ) return;
561 // Draw bitmap bm[sx,sy] into (dx1,dy1)-(dx2,dy2)
562 gr_opengl1_aabitmap_ex(dx1,dy1,dx2-dx1+1,dy2-dy1+1,sx,sy);
565 void gr_opengl1_string( int sx, int sy, const char *s )
567 int width, spacing, letter;
570 float u_scale, v_scale;
571 float u0, u1, v0, v1;
572 float x1, x2, y1, y2;
575 if ( !Current_font ) {
579 gr_set_bitmap(Current_font->bitmap_id, GR_ALPHABLEND_NONE, GR_BITBLT_MODE_NORMAL, 1.0f, -1, -1);
581 if ( !opengl1_tcache_set( gr_screen.current_bitmap, TCACHE_TYPE_AABITMAP, &u_scale, &v_scale, 0, -1, -1, 0 ) ) {
582 // Couldn't set texture
583 mprintf(( "WARNING: Error setting aabitmap texture!\n" ));
587 bm_get_info( gr_screen.current_bitmap, &bw, &bh );
589 opengl1_set_state( TEXTURE_SOURCE_NO_FILTERING, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
591 opengl_alloc_render_buffer(strlen(s) * 4);
596 if (sx==0x8000) { //centered
597 x = get_centered_x(s);
610 y += Current_font->h;
611 if (sx==0x8000) { //centered
612 x = get_centered_x(s);
619 letter = get_char_width(s[0],s[1],&width,&spacing);
622 //not in font, draw as space
630 // Check if this character is totally clipped
631 if ( x + width < gr_screen.clip_left ) continue;
632 if ( y + Current_font->h < gr_screen.clip_top ) continue;
633 if ( x > gr_screen.clip_right ) continue;
634 if ( y > gr_screen.clip_bottom ) continue;
637 if ( x < gr_screen.clip_left ) xd = gr_screen.clip_left - x;
638 if ( y < gr_screen.clip_top ) yd = gr_screen.clip_top - y;
642 wc = width - xd; hc = Current_font->h - yd;
643 if ( xc + wc > gr_screen.clip_right ) wc = gr_screen.clip_right - xc;
644 if ( yc + hc > gr_screen.clip_bottom ) hc = gr_screen.clip_bottom - yc;
646 if ( wc < 1 ) continue;
647 if ( hc < 1 ) continue;
649 int u = Current_font->bm_u[letter];
650 int v = Current_font->bm_v[letter];
652 x1 = i2fl(xc + gr_screen.offset_x);
653 y1 = i2fl(yc + gr_screen.offset_y);
657 u0 = u_scale * (i2fl(u+xd) / bw);
658 v0 = v_scale * (i2fl(v+yd) / bh);
660 u1 = u_scale * (i2fl((u+xd)+wc) / bw);
661 v1 = v_scale * (i2fl((v+yd)+hc) / bh);
663 render_buffer[rb_offset].x = x1;
664 render_buffer[rb_offset].y = y2;
665 render_buffer[rb_offset].u = u0;
666 render_buffer[rb_offset].v = v1;
669 render_buffer[rb_offset].x = x2;
670 render_buffer[rb_offset].y = y2;
671 render_buffer[rb_offset].u = u1;
672 render_buffer[rb_offset].v = v1;
675 render_buffer[rb_offset].x = x2;
676 render_buffer[rb_offset].y = y1;
677 render_buffer[rb_offset].u = u1;
678 render_buffer[rb_offset].v = v0;
681 render_buffer[rb_offset].x = x1;
682 render_buffer[rb_offset].y = y1;
683 render_buffer[rb_offset].u = u0;
684 render_buffer[rb_offset].v = v0;
688 glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
689 gr_screen.current_color.blue,gr_screen.current_color.alpha);
691 glEnableClientState(GL_TEXTURE_COORD_ARRAY);
692 glEnableClientState(GL_VERTEX_ARRAY);
694 glTexCoordPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].u);
695 glVertexPointer(2, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
697 glDrawArrays(GL_QUADS, 0, rb_offset);
699 glDisableClientState(GL_TEXTURE_COORD_ARRAY);
700 glDisableClientState(GL_VERTEX_ARRAY);
703 void gr_opengl1_line(int x1,int y1,int x2,int y2)
705 opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
707 INT_CLIPLINE(x1,y1,x2,y2,gr_screen.clip_left,gr_screen.clip_top,
708 gr_screen.clip_right,gr_screen.clip_bottom,return,void(),void());
713 sx1 = i2fl(x1 + gr_screen.offset_x)+0.5;
714 sy1 = i2fl(y1 + gr_screen.offset_y)+0.5;
715 sx2 = i2fl(x2 + gr_screen.offset_x)+0.5;
716 sy2 = i2fl(y2 + gr_screen.offset_y)+0.5;
718 opengl_alloc_render_buffer(2);
720 if ( x1 == x2 && y1 == y2 ) {
721 render_buffer[0].x = sx1;
722 render_buffer[0].y = sy1;
723 render_buffer[0].z = -0.99f;
725 glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
726 gr_screen.current_color.blue, gr_screen.current_color.alpha);
728 glEnableClientState(GL_VERTEX_ARRAY);
729 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
731 glDrawArrays(GL_POINTS, 0, 1);
733 glDisableClientState(GL_VERTEX_ARRAY);
744 } else if ( y1 == y2 ) {
752 render_buffer[0].x = sx2;
753 render_buffer[0].y = sy2;
754 render_buffer[0].z = -0.99f;
756 render_buffer[1].x = sx1;
757 render_buffer[1].y = sy1;
758 render_buffer[1].z = -0.99f;
760 glColor4ub(gr_screen.current_color.red, gr_screen.current_color.green,
761 gr_screen.current_color.blue, gr_screen.current_color.alpha);
763 glEnableClientState(GL_VERTEX_ARRAY);
764 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
766 glDrawArrays(GL_LINES, 0, 2);
768 glDisableClientState(GL_VERTEX_ARRAY);
771 void gr_opengl1_aaline(vertex *v1, vertex *v2)
773 gr_opengl1_line( fl2i(v1->sx), fl2i(v1->sy), fl2i(v2->sx), fl2i(v2->sy) );
776 void gr_opengl1_gradient(int x1,int y1,int x2,int y2)
780 if ( !gr_screen.current_color.is_alphacolor ) {
781 gr_line( x1, y1, x2, y2 );
785 INT_CLIPLINE(x1,y1,x2,y2,gr_screen.clip_left,gr_screen.clip_top,
786 gr_screen.clip_right,gr_screen.clip_bottom,return,void(),swapped=1);
788 opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_BLEND_ALPHA, ZBUFFER_TYPE_NONE );
790 int aa = swapped ? 0 : gr_screen.current_color.alpha;
791 int ba = swapped ? gr_screen.current_color.alpha : 0;
796 sx1 = i2fl(x1 + gr_screen.offset_x)+0.5;
797 sy1 = i2fl(y1 + gr_screen.offset_y)+0.5;
798 sx2 = i2fl(x2 + gr_screen.offset_x)+0.5;
799 sy2 = i2fl(y2 + gr_screen.offset_y)+0.5;
807 } else if ( y1 == y2 ) {
815 opengl_alloc_render_buffer(2);
817 render_buffer[0].r = gr_screen.current_color.red;
818 render_buffer[0].g = gr_screen.current_color.green;
819 render_buffer[0].b = gr_screen.current_color.blue;
820 render_buffer[0].a = ba;
821 render_buffer[0].x = sx2;
822 render_buffer[0].y = sy2;
823 render_buffer[0].z = -0.99f;
825 render_buffer[1].r = gr_screen.current_color.red;
826 render_buffer[1].g = gr_screen.current_color.green;
827 render_buffer[1].b = gr_screen.current_color.blue;
828 render_buffer[1].a = aa;
829 render_buffer[1].x = sx1;
830 render_buffer[1].y = sy1;
831 render_buffer[1].z = -0.99f;
833 glEnableClientState(GL_COLOR_ARRAY);
834 glColorPointer(4, GL_UNSIGNED_BYTE, sizeof(rb_t), &render_buffer[0].r);
836 glEnableClientState(GL_VERTEX_ARRAY);
837 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
839 glDrawArrays(GL_LINES, 0, 2);
841 glDisableClientState(GL_COLOR_ARRAY);
842 glDisableClientState(GL_VERTEX_ARRAY);
845 void gr_opengl1_circle( int xc, int yc, int d )
855 if ( (xc+r) < gr_screen.clip_left ) return;
856 if ( (xc-r) > gr_screen.clip_right ) return;
857 if ( (yc+r) < gr_screen.clip_top ) return;
858 if ( (yc-r) > gr_screen.clip_bottom ) return;
861 // Draw the first octant
862 gr_opengl1_line( xc-y, yc-x, xc+y, yc-x );
863 gr_opengl1_line( xc-y, yc+x, xc+y, yc+x );
868 // Draw the second octant
869 gr_opengl1_line( xc-x, yc-y, xc+x, yc-y );
870 gr_opengl1_line( xc-x, yc+y, xc+x, yc+y );
878 gr_opengl1_line( xc-x, yc-y, xc+x, yc-y );
879 gr_opengl1_line( xc-x, yc+y, xc+x, yc+y );
884 void gr_opengl1_pixel(int x, int y)
891 void gr_opengl1_cross_fade(int bmap1, int bmap2, int x1, int y1, int x2, int y2, float pct)
893 gr_set_bitmap(bmap1, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, 1.0f - pct );
896 gr_set_bitmap(bmap2, GR_ALPHABLEND_FILTER, GR_BITBLT_MODE_NORMAL, pct );
900 void gr_opengl1_flash(int r, int g, int b)
907 opengl1_set_state( TEXTURE_SOURCE_NONE, ALPHA_BLEND_ALPHA_ADDITIVE, ZBUFFER_TYPE_NONE );
909 float x1, x2, y1, y2;
910 x1 = i2fl(gr_screen.clip_left+gr_screen.offset_x);
911 y1 = i2fl(gr_screen.clip_top+gr_screen.offset_y);
912 x2 = i2fl(gr_screen.clip_right+gr_screen.offset_x);
913 y2 = i2fl(gr_screen.clip_bottom+gr_screen.offset_y);
915 glColor4ub(r, g, b, 255);
917 opengl_alloc_render_buffer(4);
919 render_buffer[0].x = x1;
920 render_buffer[0].y = y2;
921 render_buffer[0].z = -0.99f;
923 render_buffer[1].x = x2;
924 render_buffer[1].y = y2;
925 render_buffer[1].z = -0.99f;
927 render_buffer[2].x = x2;
928 render_buffer[2].y = y1;
929 render_buffer[2].z = -0.99f;
931 render_buffer[3].x = x1;
932 render_buffer[3].y = y1;
933 render_buffer[3].z = -0.99f;
935 glEnableClientState(GL_VERTEX_ARRAY);
936 glVertexPointer(3, GL_FLOAT, sizeof(rb_t), &render_buffer[0].x);
938 glDrawArrays(GL_QUADS, 0, 4);
940 glDisableClientState(GL_VERTEX_ARRAY);
944 void gr_opengl1_tmapper( int nverts, vertex **verts, uint flags )
946 opengl1_tmapper_internal( nverts, verts, flags, 0 );
949 #define FIND_SCALED_NUM(x,x0,x1,y0,y1) (((((x)-(x0))*((y1)-(y0)))/((x1)-(x0)))+(y0))
951 void gr_opengl1_scaler(vertex *va, vertex *vb )
953 float x0, y0, x1, y1;
954 float u0, v0, u1, v1;
955 float clipped_x0, clipped_y0, clipped_x1, clipped_y1;
956 float clipped_u0, clipped_v0, clipped_u1, clipped_v1;
957 float xmin, xmax, ymin, ymax;
958 int dx0, dy0, dx1, dy1;
960 //============= CLIP IT =====================
962 x0 = va->sx; y0 = va->sy;
963 x1 = vb->sx; y1 = vb->sy;
965 xmin = i2fl(gr_screen.clip_left); ymin = i2fl(gr_screen.clip_top);
966 xmax = i2fl(gr_screen.clip_right); ymax = i2fl(gr_screen.clip_bottom);
968 u0 = va->u; v0 = va->v;
969 u1 = vb->u; v1 = vb->v;
971 // Check for obviously offscreen bitmaps...
972 if ( (y1<=y0) || (x1<=x0) ) return;
973 if ( (x1<xmin ) || (x0>xmax) ) return;
974 if ( (y1<ymin ) || (y0>ymax) ) return;
976 clipped_u0 = u0; clipped_v0 = v0;
977 clipped_u1 = u1; clipped_v1 = v1;
979 clipped_x0 = x0; clipped_y0 = y0;
980 clipped_x1 = x1; clipped_y1 = y1;
982 // Clip the left, moving u0 right as necessary
984 clipped_u0 = FIND_SCALED_NUM(xmin,x0,x1,u0,u1);
988 // Clip the right, moving u1 left as necessary
990 clipped_u1 = FIND_SCALED_NUM(xmax,x0,x1,u0,u1);
994 // Clip the top, moving v0 down as necessary
996 clipped_v0 = FIND_SCALED_NUM(ymin,y0,y1,v0,v1);
1000 // Clip the bottom, moving v1 up as necessary
1002 clipped_v1 = FIND_SCALED_NUM(ymax,y0,y1,v0,v1);
1006 dx0 = fl2i(clipped_x0); dx1 = fl2i(clipped_x1);
1007 dy0 = fl2i(clipped_y0); dy1 = fl2i(clipped_y1);
1009 if (dx1<=dx0) return;
1010 if (dy1<=dy0) return;
1012 //============= DRAW IT =====================
1018 v[0].sx = clipped_x0;
1019 v[0].sy = clipped_y0;
1022 v[0].u = clipped_u0;
1023 v[0].v = clipped_v0;
1026 v[1].sx = clipped_x1;
1027 v[1].sy = clipped_y0;
1030 v[1].u = clipped_u1;
1031 v[1].v = clipped_v0;
1034 v[2].sx = clipped_x1;
1035 v[2].sy = clipped_y1;
1038 v[2].u = clipped_u1;
1039 v[2].v = clipped_v1;
1042 v[3].sx = clipped_x0;
1043 v[3].sy = clipped_y1;
1046 v[3].u = clipped_u0;
1047 v[3].v = clipped_v1;
1049 opengl1_tmapper_internal( 4, vl, TMAP_FLAG_TEXTURED, 1 );