1 /*
2 * Mesa 3-D graphics library
3 *
4 * Copyright (C) 2010 VMware, Inc. All Rights Reserved.
5 *
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
12 *
13 * The above copyright notice and this permission notice shall be included
14 * in all copies or substantial portions of the Software.
15 *
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
20 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
21 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
22 * OTHER DEALINGS IN THE SOFTWARE.
23 */
24
25
26 #ifndef TRANSFORM_FEEDBACK_H
27 #define TRANSFORM_FEEDBACK_H
28
29 #include <stdbool.h>
30 #include "bufferobj.h"
31 #include "compiler.h"
32 #include "glheader.h"
33 #include "mtypes.h"
34
35 struct _glapi_table;
36 struct dd_function_table;
37 struct gl_context;
38
39 extern void
40 _mesa_init_transform_feedback(struct gl_context *ctx);
41
42 extern void
43 _mesa_free_transform_feedback(struct gl_context *ctx);
44
45 extern void
46 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
47
48 extern unsigned
49 _mesa_compute_max_transform_feedback_vertices( struct gl_context *ctx,
50 const struct gl_transform_feedback_object *obj,
51 const struct gl_transform_feedback_info *info);
52
53
54 /*** GL_EXT_transform_feedback ***/
55
56 void GLAPIENTRY
57 _mesa_BeginTransformFeedback_no_error(GLenum mode);
58
59 extern void GLAPIENTRY
60 _mesa_BeginTransformFeedback(GLenum mode);
61
62 void GLAPIENTRY
63 _mesa_EndTransformFeedback_no_error(void);
64
65 extern void GLAPIENTRY
66 _mesa_EndTransformFeedback(void);
67
68 extern bool
69 _mesa_validate_buffer_range_xfb(struct gl_context *ctx,
70 struct gl_transform_feedback_object *obj,
71 GLuint index, struct gl_buffer_object *bufObj,
72 GLintptr offset, GLsizeiptr size, bool dsa);
73
74 extern void
75 _mesa_bind_buffer_base_transform_feedback(struct gl_context *ctx,
76 struct gl_transform_feedback_object *obj,
77 GLuint index,
78 struct gl_buffer_object *bufObj,
79 bool dsa);
80
81 void GLAPIENTRY
82 _mesa_BindBufferOffsetEXT_no_error(GLenum target, GLuint index, GLuint buffer,
83 GLintptr offset);
84
85 extern void GLAPIENTRY
86 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
87 GLintptr offset);
88
89 void GLAPIENTRY
90 _mesa_TransformFeedbackVaryings_no_error(GLuint program, GLsizei count,
91 const GLchar *const *varyings,
92 GLenum bufferMode);
93
94 extern void GLAPIENTRY
95 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
96 const GLchar * const *varyings,
97 GLenum bufferMode);
98
99 extern void GLAPIENTRY
100 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
101 GLsizei bufSize, GLsizei *length,
102 GLsizei *size, GLenum *type, GLchar *name);
103
104
105
106 /*** GL_ARB_transform_feedback2 ***/
107 extern void
108 _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
109 GLuint name);
110
111 struct gl_transform_feedback_object *
112 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
113
114 extern void GLAPIENTRY
115 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
116
117 extern void GLAPIENTRY
118 _mesa_CreateTransformFeedbacks(GLsizei n, GLuint *names);
119
120 extern GLboolean GLAPIENTRY
121 _mesa_IsTransformFeedback(GLuint name);
122
123 void GLAPIENTRY
124 _mesa_BindTransformFeedback_no_error(GLenum target, GLuint name);
125
126 extern void GLAPIENTRY
127 _mesa_BindTransformFeedback(GLenum target, GLuint name);
128
129 extern void GLAPIENTRY
130 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
131
132 void GLAPIENTRY
133 _mesa_PauseTransformFeedback_no_error(void);
134
135 extern void GLAPIENTRY
136 _mesa_PauseTransformFeedback(void);
137
138 void GLAPIENTRY
139 _mesa_ResumeTransformFeedback_no_error(void);
140
141 extern void GLAPIENTRY
142 _mesa_ResumeTransformFeedback(void);
143
144 static inline bool
_mesa_is_xfb_active_and_unpaused(const struct gl_context * ctx)145 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
146 {
147 return ctx->TransformFeedback.CurrentObject->Active &&
148 !ctx->TransformFeedback.CurrentObject->Paused;
149 }
150
151 extern bool
152 _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
153 struct gl_shader_program *shProg);
154
155 static inline void
_mesa_set_transform_feedback_binding(struct gl_context * ctx,struct gl_transform_feedback_object * tfObj,GLuint index,struct gl_buffer_object * bufObj,GLintptr offset,GLsizeiptr size)156 _mesa_set_transform_feedback_binding(struct gl_context *ctx,
157 struct gl_transform_feedback_object *tfObj, GLuint index,
158 struct gl_buffer_object *bufObj,
159 GLintptr offset, GLsizeiptr size)
160 {
161 _mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
162
163 tfObj->BufferNames[index] = bufObj->Name;
164 tfObj->Offset[index] = offset;
165 tfObj->RequestedSize[index] = size;
166
167 if (bufObj != ctx->Shared->NullBufferObj)
168 bufObj->UsageHistory |= USAGE_TRANSFORM_FEEDBACK_BUFFER;
169 }
170
171 static inline void
_mesa_bind_buffer_range_xfb(struct gl_context * ctx,struct gl_transform_feedback_object * obj,GLuint index,struct gl_buffer_object * bufObj,GLintptr offset,GLsizeiptr size)172 _mesa_bind_buffer_range_xfb(struct gl_context *ctx,
173 struct gl_transform_feedback_object *obj,
174 GLuint index, struct gl_buffer_object *bufObj,
175 GLintptr offset, GLsizeiptr size)
176 {
177 /* Note: no need to FLUSH_VERTICES or flag NewTransformFeedback, because
178 * transform feedback buffers can't be changed while transform feedback is
179 * active.
180 */
181
182 /* The general binding point */
183 _mesa_reference_buffer_object(ctx,
184 &ctx->TransformFeedback.CurrentBuffer,
185 bufObj);
186
187 /* The per-attribute binding point */
188 _mesa_set_transform_feedback_binding(ctx, obj, index, bufObj, offset, size);
189 }
190
191 /*** GL_ARB_direct_state_access ***/
192
193 extern void GLAPIENTRY
194 _mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
195
196 extern void GLAPIENTRY
197 _mesa_TransformFeedbackBufferRange(GLuint xfb, GLuint index, GLuint buffer,
198 GLintptr offset, GLsizeiptr size);
199
200 extern void GLAPIENTRY
201 _mesa_GetTransformFeedbackiv(GLuint xfb, GLenum pname, GLint *param);
202
203 extern void GLAPIENTRY
204 _mesa_GetTransformFeedbacki_v(GLuint xfb, GLenum pname, GLuint index,
205 GLint *param);
206
207 extern void GLAPIENTRY
208 _mesa_GetTransformFeedbacki64_v(GLuint xfb, GLenum pname, GLuint index,
209 GLint64 *param);
210
211 #endif /* TRANSFORM_FEEDBACK_H */
212