1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
|
/*
SDL - Simple DirectMedia Layer
Copyright (C) 1997-2012 Sam Lantinga
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Sam Lantinga
slouken@libsdl.org
*/
#include "SDL_config.h"
#include "SDL_video.h"
#include "../SDL_blit.h"
#include "SDL_fb3dfx.h"
#include "3dfx_mmio.h"
/* Wait for vertical retrace */
static void WaitVBL(_THIS)
{
/* find start of retrace */
tdfx_waitidle();
while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == STATUS_RETRACE )
;
/* wait until we're past the start */
while( (tdfx_in32(TDFX_STATUS) & STATUS_RETRACE) == 0 )
;
}
static void WaitIdle(_THIS)
{
tdfx_waitidle();
}
/* Sets video mem colorkey and accelerated blit function */
static int SetHWColorKey(_THIS, SDL_Surface *surface, Uint32 key)
{
return(0);
}
static int FillHWRect(_THIS, SDL_Surface *dst, SDL_Rect *rect, Uint32 color)
{
int bpp;
Uint32 dst_base;
Uint32 format;
int dstX, dstY;
/* Don't blit to the display surface when switched away */
if ( switched_away ) {
return -2; /* no hardware access */
}
if ( dst == this->screen ) {
SDL_mutexP(hw_lock);
}
/* Set the destination pixel format */
dst_base = ((char *)dst->pixels - mapped_mem);
bpp = dst->format->BitsPerPixel;
format = dst->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
/* Calculate source and destination base coordinates */
dstX = rect->x;
dstY = rect->y;
/* Execute the fill command */
tdfx_wait(6);
tdfx_out32(DSTBASE, dst_base);
tdfx_out32(DSTFORMAT, format);
tdfx_out32(COLORFORE, color);
tdfx_out32(COMMAND_2D, COMMAND_2D_FILLRECT);
tdfx_out32(DSTSIZE, rect->w | (rect->h << 16));
tdfx_out32(LAUNCH_2D, dstX | (dstY << 16));
FB_AddBusySurface(dst);
if ( dst == this->screen ) {
SDL_mutexV(hw_lock);
}
return(0);
}
static int HWAccelBlit(SDL_Surface *src, SDL_Rect *srcrect,
SDL_Surface *dst, SDL_Rect *dstrect)
{
SDL_VideoDevice *this = current_video;
int bpp;
Uint32 src_format;
Uint32 src_base;
Uint32 dst_base;
int srcX, srcY;
int dstX, dstY;
Uint32 blitop;
Uint32 use_colorkey;
/* Don't blit to the display surface when switched away */
if ( switched_away ) {
return -2; /* no hardware access */
}
if ( dst == this->screen ) {
SDL_mutexP(hw_lock);
}
/* Set the source and destination pixel format */
src_base = ((char *)src->pixels - mapped_mem);
bpp = src->format->BitsPerPixel;
src_format = src->pitch | ((bpp+((bpp==8) ? 0 : 8)) << 13);
dst_base = ((char *)dst->pixels - mapped_mem);
bpp = dst->format->BitsPerPixel;
srcX = srcrect->x;
srcY = srcrect->y;
dstX = dstrect->x;
dstY = dstrect->y;
/* Assemble the blit operation */
blitop = COMMAND_2D_BITBLT | (0xCC << 24);
if ( srcX <= dstX ) {
blitop |= BIT(14);
srcX += (dstrect->w - 1);
dstX += (dstrect->w - 1);
}
if ( srcY <= dstY ) {
blitop |= BIT(15);
srcY += (dstrect->h - 1);
dstY += (dstrect->h - 1);
}
/* Perform the blit! */
if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
tdfx_wait(3);
tdfx_out32(SRCCOLORKEYMIN, src->format->colorkey);
tdfx_out32(SRCCOLORKEYMAX, src->format->colorkey);
tdfx_out32(ROP_2D, 0xAA00);
use_colorkey = 1;
} else {
use_colorkey = 0;
}
tdfx_wait(9);
tdfx_out32(SRCBASE, (Uint32)src_base);
tdfx_out32(SRCFORMAT, src_format);
tdfx_out32(DSTBASE, (Uint32)dst_base);
tdfx_out32(DSTFORMAT, src_format);
tdfx_out32(COMMAND_2D, blitop);
tdfx_out32(COMMANDEXTRA_2D, use_colorkey);
tdfx_out32(DSTSIZE, dstrect->w | (dstrect->h << 16));
tdfx_out32(DSTXY, dstX | (dstY << 16));
tdfx_out32(LAUNCH_2D, srcX | (srcY << 16));
FB_AddBusySurface(src);
FB_AddBusySurface(dst);
if ( dst == this->screen ) {
SDL_mutexV(hw_lock);
}
return(0);
}
static int CheckHWBlit(_THIS, SDL_Surface *src, SDL_Surface *dst)
{
int accelerated;
/* Set initial acceleration on */
src->flags |= SDL_HWACCEL;
/* Set the surface attributes */
if ( (src->flags & SDL_SRCALPHA) == SDL_SRCALPHA ) {
if ( ! this->info.blit_hw_A ) {
src->flags &= ~SDL_HWACCEL;
}
}
if ( (src->flags & SDL_SRCCOLORKEY) == SDL_SRCCOLORKEY ) {
if ( ! this->info.blit_hw_CC ) {
src->flags &= ~SDL_HWACCEL;
}
}
/* Check to see if final surface blit is accelerated */
accelerated = !!(src->flags & SDL_HWACCEL);
if ( accelerated ) {
src->map->hw_blit = HWAccelBlit;
}
return(accelerated);
}
void FB_3DfxAccel(_THIS, __u32 card)
{
/* We have hardware accelerated surface functions */
this->CheckHWBlit = CheckHWBlit;
wait_vbl = WaitVBL;
wait_idle = WaitIdle;
/* Reset the 3Dfx controller */
tdfx_out32(BRESERROR0, 0);
tdfx_out32(BRESERROR1, 0);
/* The 3Dfx has an accelerated color fill */
this->info.blit_fill = 1;
this->FillHWRect = FillHWRect;
/* The 3Dfx has accelerated normal and colorkey blits */
this->info.blit_hw = 1;
this->info.blit_hw_CC = 1;
this->SetHWColorKey = SetHWColorKey;
}
|
