1 /*
2 SDL - Simple DirectMedia Layer
3 Copyright (C) 1997-2012 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 */
WaitVBL(_THIS)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 }
WaitIdle(_THIS)41 static void WaitIdle(_THIS)
42 {
43 tdfx_waitidle();
44 }
45
46 /* Sets video mem colorkey and accelerated blit function */
SetHWColorKey(_THIS,SDL_Surface * surface,Uint32 key)47 static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
48 {
49 return(0);
50 }
51
FillHWRect(_THIS,SDL_Surface * dst,SDL_Rect * rect,Uint32 color)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
HWAccelBlit(SDL_Surface * src,SDL_Rect * srcrect,SDL_Surface * dst,SDL_Rect * dstrect)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 src_base;
100 Uint32 dst_base;
101 int srcX, srcY;
102 int dstX, dstY;
103 Uint32 blitop;
104 Uint32 use_colorkey;
105
106 /* Don't blit to the display surface when switched away */
107 if ( switched_away ) {
108 return -2; /* no hardware access */
109 }
110 if ( dst == this->screen ) {
111 SDL_mutexP(hw_lock);
112 }
113
114 /* Set the source and destination pixel format */
115 src_base = ((char *)src->pixels - mapped_mem);
116 bpp = src->format->BitsPerPixel;
117 src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
118 dst_base = ((char *)dst->pixels - mapped_mem);
119 bpp = dst->format->BitsPerPixel;
120
121 srcX = srcrect->x;
122 srcY = srcrect->y;
123 dstX = dstrect->x;
124 dstY = dstrect->y;
125
126 /* Assemble the blit operation */
127 blitop = COMMAND_2D_BITBLT | (0xCC << 24);
128 if ( srcX <= dstX ) {
129 blitop |= BIT(14);
130 srcX += (dstrect->w - 1);
131 dstX += (dstrect->w - 1);
132 }
133 if ( srcY <= dstY ) {
134 blitop |= BIT(15);
135 srcY += (dstrect->h - 1);
136 dstY += (dstrect->h - 1);
137 }
138
139 /* Perform the blit! */
140 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
141 tdfx_wait(3);
142 tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
143 tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
144 tdfx_out32(ROP_2D, 0xAA00);
145 use_colorkey = 1;
146 } else {
147 use_colorkey = 0;
148 }
149 tdfx_wait(9);
150 tdfx_out32(SRCBASE, (Uint32)src_base);
151 tdfx_out32(SRCFORMAT, src_format);
152 tdfx_out32(DSTBASE, (Uint32)dst_base);
153 tdfx_out32(DSTFORMAT, src_format);
154 tdfx_out32(COMMAND_2D, blitop);
155 tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
156 tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
157 tdfx_out32(DSTXY, dstX | (dstY << 16));
158 tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
159
160 FB_AddBusySurface(src);
161 FB_AddBusySurface(dst);
162
163 if ( dst == this->screen ) {
164 SDL_mutexV(hw_lock);
165 }
166 return(0);
167 }
168
CheckHWBlit(_THIS,SDL_Surface * src,SDL_Surface * dst)169 static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
170 {
171 int accelerated;
172
173 /* Set initial acceleration on */
174 src->flags |= SDL_HWACCEL;
175
176 /* Set the surface attributes */
177 if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
178 if ( ! this->info.blit_hw_A ) {
179 src->flags &= ~SDL_HWACCEL;
180 }
181 }
182 if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
183 if ( ! this->info.blit_hw_CC ) {
184 src->flags &= ~SDL_HWACCEL;
185 }
186 }
187
188 /* Check to see if final surface blit is accelerated */
189 accelerated = !!(src->flags & SDL_HWACCEL);
190 if ( accelerated ) {
191 src->map->hw_blit = HWAccelBlit;
192 }
193 return(accelerated);
194 }
195
FB_3DfxAccel(_THIS,__u32 card)196 void FB_3DfxAccel(_THIS, __u32 card)
197 {
198 /* We have hardware accelerated surface functions */
199 this->CheckHWBlit = CheckHWBlit;
200 wait_vbl = WaitVBL;
201 wait_idle = WaitIdle;
202
203 /* Reset the 3Dfx controller */
204 tdfx_out32(BRESERROR0, 0);
205 tdfx_out32(BRESERROR1, 0);
206
207 /* The 3Dfx has an accelerated color fill */
208 this->info.blit_fill = 1;
209 this->FillHWRect = FillHWRect;
210
211 /* The 3Dfx has accelerated normal and colorkey blits */
212 this->info.blit_hw = 1;
213 this->info.blit_hw_CC = 1;
214 this->SetHWColorKey = SetHWColorKey;
215 }
216