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
|
/* $Id: svgamesa16.c,v 1.3 2000/01/23 17:49:54 brianp Exp $ */
/*
* Mesa 3-D graphics library
* Version: 3.2
* Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/*
* SVGA driver for Mesa.
* Original author: Brian Paul
* Additional authors: Slawomir Szczyrba <steev@hot.pl> (Mesa 3.2)
*/
#ifdef SVGA
#include "svgapix.h"
GLshort * shortBuffer;
int __svga_drawpixel16(int x, int y, unsigned long c)
{
unsigned long offset;
shortBuffer=(void *)SVGABuffer.BackBuffer;
y = SVGAInfo->height-y-1;
offset = y * SVGAInfo->width + x;
shortBuffer[offset]=c;
return 0;
}
unsigned long __svga_getpixel16(int x, int y)
{
unsigned long offset;
shortBuffer=(void *)SVGABuffer.BackBuffer;
y = SVGAInfo->height-y-1;
offset = y * SVGAInfo->width + x;
return shortBuffer[offset];
}
void __set_color16( GLcontext *ctx,
GLubyte red, GLubyte green,
GLubyte blue, GLubyte alpha )
{
SVGAMesa->hicolor=(red>>3)<<11 | (green>>2)<<5 | (blue>>3);
/* SVGAMesa->hicolor=(red)<<11 | (green)<<5 | (blue); */
}
void __clear_color16( GLcontext *ctx,
GLubyte red, GLubyte green,
GLubyte blue, GLubyte alpha )
{
SVGAMesa->clear_hicolor=(red>>3)<<11 | (green>>2)<<5 | (blue>>3);
/* SVGAMesa->clear_hicolor=(red)<<11 | (green)<<5 | (blue); */
}
GLbitfield __clear16( GLcontext *ctx, GLbitfield mask, GLboolean all,
GLint x, GLint y, GLint width, GLint height )
{
int i,j;
if (mask & GL_COLOR_BUFFER_BIT) {
if (all) {
shortBuffer=(void *)SVGABuffer.BackBuffer;
for (i=0;i<SVGABuffer.BufferSize / 2;i++) shortBuffer[i]=SVGAMesa->clear_hicolor;
} else {
for (i=x;i<width;i++)
for (j=y;j<height;j++)
__svga_drawpixel16(i,j,SVGAMesa->clear_hicolor);
}
}
return mask & (~GL_COLOR_BUFFER_BIT);
}
void __write_rgba_span16( const GLcontext *ctx, GLuint n, GLint x, GLint y,
const GLubyte rgba[][4], const GLubyte mask[] )
{
int i;
if (mask) {
/* draw some pixels */
for (i=0; i<n; i++, x++) {
if (mask[i]) {
__svga_drawpixel16( x, y, (rgba[i][RCOMP]>>3)<<11 | \
(rgba[i][GCOMP]>>2)<<5 | \
(rgba[i][BCOMP]>>3));
}
}
}
else {
/* draw all pixels */
for (i=0; i<n; i++, x++) {
__svga_drawpixel16( x, y, (rgba[i][RCOMP]>>3)<<11 | \
(rgba[i][GCOMP]>>2)<<5 | \
(rgba[i][BCOMP]>>3));
}
}
}
void __write_mono_rgba_span16( const GLcontext *ctx,
GLuint n, GLint x, GLint y,
const GLubyte mask[])
{
int i;
for (i=0; i<n; i++, x++) {
if (mask[i]) {
__svga_drawpixel16( x, y, SVGAMesa->hicolor);
}
}
}
void __read_rgba_span16( const GLcontext *ctx, GLuint n, GLint x, GLint y,
GLubyte rgba[][4] )
{
int i,pix;
for (i=0; i<n; i++, x++) {
pix = __svga_getpixel16( x, y );
rgba[i][RCOMP] = ((pix>>11)<<3) & 0xff;
rgba[i][GCOMP] = ((pix>> 5)<<2) & 0xff;
rgba[i][BCOMP] = ((pix )<<3) & 0xff;
}
}
void __write_rgba_pixels16( const GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
const GLubyte rgba[][4], const GLubyte mask[] )
{
int i;
for (i=0; i<n; i++) {
if (mask[i]) {
__svga_drawpixel16( x[i], y[i], (rgba[i][RCOMP]>>3)<<11 | \
(rgba[i][GCOMP]>>2)<<5 | \
(rgba[i][BCOMP]>>3));
}
}
}
void __write_mono_rgba_pixels16( const GLcontext *ctx,
GLuint n,
const GLint x[], const GLint y[],
const GLubyte mask[] )
{
int i;
/* use current rgb color */
for (i=0; i<n; i++) {
if (mask[i]) {
__svga_drawpixel16( x[i], y[i], SVGAMesa->hicolor );
}
}
}
void __read_rgba_pixels16( const GLcontext *ctx,
GLuint n, const GLint x[], const GLint y[],
GLubyte rgba[][4], const GLubyte mask[] )
{
int i,pix;
for (i=0; i<n; i++,x++) {
pix = __svga_getpixel16( x[i], y[i] );
rgba[i][RCOMP] = ((pix>>11)<<3) & 0xff;
rgba[i][GCOMP] = ((pix>> 5)<<2) & 0xff;
rgba[i][BCOMP] = ((pix )<<3) & 0xff;
}
}
#endif
|
