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
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
|
/*
* Notes:
* 1. These functions plug into the gl_renderbuffer structure.
* 2. The 'values' parameter always points to GLuint values, regardless of
* the actual Z buffer depth.
*/
#ifndef DBG
#define DBG 0
#endif
#ifndef HAVE_HW_DEPTH_SPANS
#define HAVE_HW_DEPTH_SPANS 0
#endif
#ifndef HAVE_HW_DEPTH_PIXELS
#define HAVE_HW_DEPTH_PIXELS 0
#endif
#ifndef HW_READ_LOCK
#define HW_READ_LOCK() HW_LOCK()
#endif
#ifndef HW_READ_UNLOCK
#define HW_READ_UNLOCK() HW_UNLOCK()
#endif
static void TAG(WriteDepthSpan)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
const void *values,
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
const GLuint *depth = (const GLuint *) values;
GLint x1;
GLint n1;
LOCAL_DEPTH_VARS;
y = Y_FLIP( y );
#if HAVE_HW_DEPTH_SPANS
(void) x1; (void) n1;
if ( DBG ) fprintf( stderr, "WriteDepthSpan 0..%d (x1 %d)\n",
(int)n, (int)x );
WRITE_DEPTH_SPAN();
#else
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN( x, y, n, x1, n1, i );
if ( DBG ) fprintf( stderr, "WriteDepthSpan %d..%d (x1 %d) (mask %p)\n",
(int)i, (int)n1, (int)x1, mask );
if ( mask ) {
for ( ; n1>0 ; i++, x1++, n1-- ) {
if ( mask[i] ) WRITE_DEPTH( x1, y, depth[i] );
}
} else {
for ( ; n1>0 ; i++, x1++, n1-- ) {
WRITE_DEPTH( x1, y, depth[i] );
}
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_WRITE_UNLOCK();
}
#if HAVE_HW_DEPTH_SPANS
/* implement MonoWriteDepthSpan() in terms of WriteDepthSpan() */
static void
TAG(WriteMonoDepthSpan)( GLcontext *ctx, struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
const void *value, const GLubyte mask[] )
{
const GLuint depthVal = *((GLuint *) value);
GLuint depths[MAX_WIDTH];
GLuint i;
for (i = 0; i < n; i++)
depths[i] = depthVal;
TAG(WriteDepthSpan)(ctx, rb, n, x, y, depths, mask);
}
#else
static void TAG(WriteMonoDepthSpan)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
const void *value,
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
const GLuint depth = *((GLuint *) value);
GLint x1;
GLint n1;
LOCAL_DEPTH_VARS;
y = Y_FLIP( y );
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN( x, y, n, x1, n1, i );
if ( DBG ) fprintf( stderr, "%s %d..%d (x1 %d) = %u\n",
__FUNCTION__, (int)i, (int)n1, (int)x1, (GLuint)depth );
if ( mask ) {
for ( ; n1>0 ; i++, x1++, n1-- ) {
if ( mask[i] ) WRITE_DEPTH( x1, y, depth );
}
} else {
for ( ; n1>0 ; x1++, n1-- ) {
WRITE_DEPTH( x1, y, depth );
}
}
}
HW_ENDCLIPLOOP();
}
HW_WRITE_UNLOCK();
}
#endif
static void TAG(WriteDepthPixels)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n,
const GLint x[],
const GLint y[],
const void *values,
const GLubyte mask[] )
{
HW_WRITE_LOCK()
{
const GLuint *depth = (const GLuint *) values;
GLuint i;
LOCAL_DEPTH_VARS;
if ( DBG ) fprintf( stderr, "WriteDepthPixels\n" );
#if HAVE_HW_DEPTH_PIXELS
(void) i;
WRITE_DEPTH_PIXELS();
#else
HW_CLIPLOOP()
{
if ( mask ) {
for ( i = 0 ; i < n ; i++ ) {
if ( mask[i] ) {
const int fy = Y_FLIP( y[i] );
if ( CLIPPIXEL( x[i], fy ) )
WRITE_DEPTH( x[i], fy, depth[i] );
}
}
}
else {
for ( i = 0 ; i < n ; i++ ) {
const int fy = Y_FLIP( y[i] );
if ( CLIPPIXEL( x[i], fy ) )
WRITE_DEPTH( x[i], fy, depth[i] );
}
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_WRITE_UNLOCK();
}
/* Read depth spans and pixels
*/
static void TAG(ReadDepthSpan)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n, GLint x, GLint y,
void *values )
{
HW_READ_LOCK()
{
GLuint *depth = (GLuint *) values;
GLint x1, n1;
LOCAL_DEPTH_VARS;
y = Y_FLIP( y );
if ( DBG ) fprintf( stderr, "ReadDepthSpan\n" );
#if HAVE_HW_DEPTH_SPANS
(void) x1; (void) n1;
READ_DEPTH_SPAN();
#else
HW_CLIPLOOP()
{
GLint i = 0;
CLIPSPAN( x, y, n, x1, n1, i );
for ( ; n1>0 ; i++, n1-- ) {
READ_DEPTH( depth[i], x+i, y );
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_READ_UNLOCK();
}
static void TAG(ReadDepthPixels)( GLcontext *ctx,
struct gl_renderbuffer *rb,
GLuint n,
const GLint x[], const GLint y[],
void *values )
{
HW_READ_LOCK()
{
GLuint *depth = (GLuint *) values;
GLuint i;
LOCAL_DEPTH_VARS;
if ( DBG ) fprintf( stderr, "ReadDepthPixels\n" );
#if HAVE_HW_DEPTH_PIXELS
(void) i;
READ_DEPTH_PIXELS();
#else
HW_CLIPLOOP()
{
for ( i = 0 ; i < n ;i++ ) {
int fy = Y_FLIP( y[i] );
if ( CLIPPIXEL( x[i], fy ) )
READ_DEPTH( depth[i], x[i], fy );
}
}
HW_ENDCLIPLOOP();
#endif
}
HW_READ_UNLOCK();
}
#if HAVE_HW_DEPTH_SPANS
#undef WRITE_DEPTH_SPAN
#undef WRITE_DEPTH_PIXELS
#undef READ_DEPTH_SPAN
#undef READ_DEPTH_PIXELS
#else
#undef WRITE_DEPTH
#undef READ_DEPTH
#endif
#undef TAG
|
