e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 Sam Lantinga |
4 | |
5 | This library is free software; you can redistribute it and/or |
6 | modify it under the terms of the GNU Lesser General Public |
7 | License as published by the Free Software Foundation; either |
8 | version 2.1 of the License, or (at your option) any later version. |
9 | |
10 | This library is distributed in the hope that it will be useful, |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
13 | Lesser General Public License for more details. |
14 | |
15 | You should have received a copy of the GNU Lesser General Public |
16 | License along with this library; if not, write to the Free Software |
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
18 | |
19 | Sam Lantinga |
20 | slouken@libsdl.org |
21 | */ |
22 | #include "SDL_config.h" |
23 | |
24 | #include "SDL_video.h" |
25 | #include "../SDL_blit.h" |
26 | #include "SDL_fb3dfx.h" |
27 | #include "3dfx_mmio.h" |
28 | |
29 | |
30 | /* Wait for vertical retrace */ |
31 | static void WaitVBL(_THIS) |
32 | { |
33 | /* find start of retrace */ |
34 | tdfx_waitidle(); |
35 | while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE ) |
36 | ; |
37 | /* wait until we're past the start */ |
38 | while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0 ) |
39 | ; |
40 | } |
41 | static void WaitIdle(_THIS) |
42 | { |
43 | tdfx_waitidle(); |
44 | } |
45 | |
46 | /* Sets video mem colorkey and accelerated blit function */ |
47 | static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key) |
48 | { |
49 | return(0); |
50 | } |
51 | |
52 | static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color) |
53 | { |
54 | int bpp; |
55 | Uint32 dst_base; |
56 | Uint32 format; |
57 | int dstX, dstY; |
58 | |
59 | /* Don't blit to the display surface when switched away */ |
60 | if ( switched_away ) { |
61 | return -2; /* no hardware access */ |
62 | } |
63 | if ( dst == this->screen ) { |
64 | SDL_mutexP(hw_lock); |
65 | } |
66 | |
67 | /* Set the destination pixel format */ |
68 | dst_base = ((char *)dst->pixels - mapped_mem); |
69 | bpp = dst->format->BitsPerPixel; |
70 | format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); |
71 | |
72 | /* Calculate source and destination base coordinates */ |
73 | dstX = rect->x; |
74 | dstY = rect->y; |
75 | |
76 | /* Execute the fill command */ |
77 | tdfx_wait(6); |
78 | tdfx_out32(DSTBASE, dst_base); |
79 | tdfx_out32(DSTFORMAT, format); |
80 | tdfx_out32(COLORFORE, color); |
81 | tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT); |
82 | tdfx_out32(DSTSIZE, rect->w | (rect->h << 16)); |
83 | tdfx_out32(LAUNCH_2D, dstX | (dstY << 16)); |
84 | |
85 | FB_AddBusySurface(dst); |
86 | |
87 | if ( dst == this->screen ) { |
88 | SDL_mutexV(hw_lock); |
89 | } |
90 | return(0); |
91 | } |
92 | |
93 | static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect, |
94 | SDL_Surface *dst, SDL_Rect *dstrect) |
95 | { |
96 | SDL_VideoDevice *this = current_video; |
97 | int bpp; |
98 | Uint32 src_format; |
99 | Uint32 dst_format; |
100 | Uint32 src_base; |
101 | Uint32 dst_base; |
102 | int srcX, srcY; |
103 | int dstX, dstY; |
104 | Uint32 blitop; |
105 | Uint32 use_colorkey; |
106 | |
107 | /* Don't blit to the display surface when switched away */ |
108 | if ( switched_away ) { |
109 | return -2; /* no hardware access */ |
110 | } |
111 | if ( dst == this->screen ) { |
112 | SDL_mutexP(hw_lock); |
113 | } |
114 | |
115 | /* Set the source and destination pixel format */ |
116 | src_base = ((char *)src->pixels - mapped_mem); |
117 | bpp = src->format->BitsPerPixel; |
118 | src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); |
119 | dst_base = ((char *)dst->pixels - mapped_mem); |
120 | bpp = dst->format->BitsPerPixel; |
121 | dst_format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13); |
122 | |
123 | srcX = srcrect->x; |
124 | srcY = srcrect->y; |
125 | dstX = dstrect->x; |
126 | dstY = dstrect->y; |
127 | |
128 | /* Assemble the blit operation */ |
129 | blitop = COMMAND_2D_BITBLT | (0xCC << 24); |
130 | if ( srcX <= dstX ) { |
131 | blitop |= BIT(14); |
132 | srcX += (dstrect->w - 1); |
133 | dstX += (dstrect->w - 1); |
134 | } |
135 | if ( srcY <= dstY ) { |
136 | blitop |= BIT(15); |
137 | srcY += (dstrect->h - 1); |
138 | dstY += (dstrect->h - 1); |
139 | } |
140 | |
141 | /* Perform the blit! */ |
142 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
143 | tdfx_wait(3); |
144 | tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey); |
145 | tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey); |
146 | tdfx_out32(ROP_2D, 0xAA00); |
147 | use_colorkey = 1; |
148 | } else { |
149 | use_colorkey = 0; |
150 | } |
151 | tdfx_wait(9); |
152 | tdfx_out32(SRCBASE, (Uint32)src_base); |
153 | tdfx_out32(SRCFORMAT, src_format); |
154 | tdfx_out32(DSTBASE, (Uint32)dst_base); |
155 | tdfx_out32(DSTFORMAT, src_format); |
156 | tdfx_out32(COMMAND_2D, blitop); |
157 | tdfx_out32(COMMANDEXTRA_2D, use_colorkey); |
158 | tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16)); |
159 | tdfx_out32(DSTXY, dstX | (dstY << 16)); |
160 | tdfx_out32(LAUNCH_2D, srcX | (srcY << 16)); |
161 | |
162 | FB_AddBusySurface(src); |
163 | FB_AddBusySurface(dst); |
164 | |
165 | if ( dst == this->screen ) { |
166 | SDL_mutexV(hw_lock); |
167 | } |
168 | return(0); |
169 | } |
170 | |
171 | static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst) |
172 | { |
173 | int accelerated; |
174 | |
175 | /* Set initial acceleration on */ |
176 | src->flags |= SDL_HWACCEL; |
177 | |
178 | /* Set the surface attributes */ |
179 | if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) { |
180 | if ( ! this->info.blit_hw_A ) { |
181 | src->flags &= ~SDL_HWACCEL; |
182 | } |
183 | } |
184 | if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) { |
185 | if ( ! this->info.blit_hw_CC ) { |
186 | src->flags &= ~SDL_HWACCEL; |
187 | } |
188 | } |
189 | |
190 | /* Check to see if final surface blit is accelerated */ |
191 | accelerated = !!(src->flags & SDL_HWACCEL); |
192 | if ( accelerated ) { |
193 | src->map->hw_blit = HWAccelBlit; |
194 | } |
195 | return(accelerated); |
196 | } |
197 | |
198 | void FB_3DfxAccel(_THIS, __u32 card) |
199 | { |
200 | /* We have hardware accelerated surface functions */ |
201 | this->CheckHWBlit = CheckHWBlit; |
202 | wait_vbl = WaitVBL; |
203 | wait_idle = WaitIdle; |
204 | |
205 | /* Reset the 3Dfx controller */ |
206 | tdfx_out32(BRESERROR0, 0); |
207 | tdfx_out32(BRESERROR1, 0); |
208 | |
209 | /* The 3Dfx has an accelerated color fill */ |
210 | this->info.blit_fill = 1; |
211 | this->FillHWRect = FillHWRect; |
212 | |
213 | /* The 3Dfx has accelerated normal and colorkey blits */ |
214 | this->info.blit_hw = 1; |
215 | this->info.blit_hw_CC = 1; |
216 | this->SetHWColorKey = SetHWColorKey; |
217 | } |