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
|
#include "xsmesaP.h"
#include "mesaglx/types.h"
#include "vbrender.h"
#include "glx_log.h"
#include "vga.h"
#include "vgaPCI.h"
#include <stdio.h>
#include <stdlib.h>
#include "mm.h"
#include "i810lib.h"
#include "i810dd.h"
#include "i810glx.h"
#include "i810clear.h"
#include "i810state.h"
#include "i810tris.h"
/*
* i810Clear
* perform hardware accelerated clearing of the color and/or depth
* buffer. Software may still clear stencil buffers.
* If all==GL_TRUE, clear whole buffer, else just clear region defined
* by x,y,width,height
*/
GLbitfield i810Clear( GLcontext *ctx, GLbitfield mask, GLboolean all,
GLint x, GLint y, GLint width, GLint height )
{
XSMesaContext xsmesa = (XSMesaContext) ctx->DriverCtx;
GLubyte *c;
GLuint zval;
i810Msg(10, "i810Clear( %i, %i, %i, %i, %i )\n",
mask, x, y, width, height );
CHECK_CONTEXT( return mask; );
if (all == GL_TRUE) {
x = 0;
y = 0;
width = i810DB->Width;
height = i810DB->Height;
}
if ( y + height > i810DB->Height ) {
height = i810DB->Height - y;
}
if ( x + width > i810DB->Width ) {
width = i810DB->Width - x;
}
if ( x < 0 ) {
width += x;
x = 0;
}
if ( y < 0 ) {
height += y;
y = 0;
}
if ( x >= i810DB->Width || y >= i810DB->Height || width < 1 || height < 1 ) {
return 0;
}
/* flip top to bottom */
y = i810DB->Height-y-height;
c = xsmesa->clearcolor;
zval = (GLuint) (ctx->Depth.Clear * DEPTH_SCALE);
i810FinishPrimitive();
if (1)
{
BEGIN_BATCH(2);
OUT_BATCH( INST_PARSER_CLIENT | INST_OP_FLUSH );
OUT_BATCH( 0 ); /* pad to quadword */
ADVANCE_BATCH();
}
/* color buffer */
if (mask & GL_COLOR_BUFFER_BIT)
{
int start = (i810DB->MemBlock->ofs +
y * i810DB->Pitch +
x * vgaBytesPerPixel);
BEGIN_BATCH(6);
OUT_BATCH( BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3 );
OUT_BATCH( BR13_SOLID_PATTERN |
(0xF0 << 16) |
i810DB->Pitch );
OUT_BATCH( (height << 16) | (width * vgaBytesPerPixel));
OUT_BATCH( start );
OUT_BATCH( i810PackColor( i810DB->Format, c[0], c[1], c[2], c[3] ) );
OUT_BATCH( 0 );
ADVANCE_BATCH();
mask &= ~GL_COLOR_BUFFER_BIT;
}
/* depth buffer */
if ( (mask & GL_DEPTH_BUFFER_BIT) &&
i810DB->ZBuffer &&
ctx->Depth.Mask )
{
int start = (i810DB->ZBuffer->MemBlock->ofs +
y * i810DB->ZBuffer->Pitch +
x * 2);
BEGIN_BATCH(6);
OUT_BATCH( BR00_BITBLT_CLIENT | BR00_OP_COLOR_BLT | 0x3 );
OUT_BATCH( BR13_SOLID_PATTERN |
(0xF0 << 16) |
i810DB->ZBuffer->Pitch );
OUT_BATCH( (height << 16) | (width * 2));
OUT_BATCH( start );
OUT_BATCH( zval );
OUT_BATCH( 0 );
ADVANCE_BATCH();
mask &= ~GL_DEPTH_BUFFER_BIT;
}
if (1)
{
BEGIN_BATCH(2);
OUT_BATCH( INST_PARSER_CLIENT | INST_OP_FLUSH );
OUT_BATCH( 0 ); /* pad to quadword */
ADVANCE_BATCH();
}
return mask;
}
|
