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 GLboolean
46 _mesa_validate_transform_feedback_buffers(struct gl_context *ctx);
47
48
49 extern void
50 _mesa_init_transform_feedback_functions(struct dd_function_table *driver);
51
52 extern unsigned
53 _mesa_compute_max_transform_feedback_vertices( struct gl_context *ctx,
54 const struct gl_transform_feedback_object *obj,
55 const struct gl_transform_feedback_info *info);
56
57
58 /*** GL_EXT_transform_feedback ***/
59
60 extern void GLAPIENTRY
61 _mesa_BeginTransformFeedback(GLenum mode);
62
63 extern void GLAPIENTRY
64 _mesa_EndTransformFeedback(void);
65
66 extern void
67 _mesa_bind_buffer_range_transform_feedback(struct gl_context *ctx,
68 struct gl_transform_feedback_object *obj,
69 GLuint index,
70 struct gl_buffer_object *bufObj,
71 GLintptr offset,
72 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 extern void GLAPIENTRY
82 _mesa_BindBufferOffsetEXT(GLenum target, GLuint index, GLuint buffer,
83 GLintptr offset);
84
85 extern void GLAPIENTRY
86 _mesa_TransformFeedbackVaryings(GLuint program, GLsizei count,
87 const GLchar * const *varyings,
88 GLenum bufferMode);
89
90 extern void GLAPIENTRY
91 _mesa_GetTransformFeedbackVarying(GLuint program, GLuint index,
92 GLsizei bufSize, GLsizei *length,
93 GLsizei *size, GLenum *type, GLchar *name);
94
95
96
97 /*** GL_ARB_transform_feedback2 ***/
98 extern void
99 _mesa_init_transform_feedback_object(struct gl_transform_feedback_object *obj,
100 GLuint name);
101
102 struct gl_transform_feedback_object *
103 _mesa_lookup_transform_feedback_object(struct gl_context *ctx, GLuint name);
104
105 extern void GLAPIENTRY
106 _mesa_GenTransformFeedbacks(GLsizei n, GLuint *names);
107
108 extern void GLAPIENTRY
109 _mesa_CreateTransformFeedbacks(GLsizei n, GLuint *names);
110
111 extern GLboolean GLAPIENTRY
112 _mesa_IsTransformFeedback(GLuint name);
113
114 extern void GLAPIENTRY
115 _mesa_BindTransformFeedback(GLenum target, GLuint name);
116
117 extern void GLAPIENTRY
118 _mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names);
119
120 extern void GLAPIENTRY
121 _mesa_PauseTransformFeedback(void);
122
123 extern void GLAPIENTRY
124 _mesa_ResumeTransformFeedback(void);
125
126 static inline bool
_mesa_is_xfb_active_and_unpaused(const struct gl_context * ctx)127 _mesa_is_xfb_active_and_unpaused(const struct gl_context *ctx)
128 {
129 return ctx->TransformFeedback.CurrentObject->Active &&
130 !ctx->TransformFeedback.CurrentObject->Paused;
131 }
132
133 extern bool
134 _mesa_transform_feedback_is_using_program(struct gl_context *ctx,
135 struct gl_shader_program *shProg);
136
137 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)138 _mesa_set_transform_feedback_binding(struct gl_context *ctx,
139 struct gl_transform_feedback_object *tfObj, GLuint index,
140 struct gl_buffer_object *bufObj,
141 GLintptr offset, GLsizeiptr size)
142 {
143 _mesa_reference_buffer_object(ctx, &tfObj->Buffers[index], bufObj);
144
145 tfObj->BufferNames[index] = bufObj->Name;
146 tfObj->Offset[index] = offset;
147 tfObj->RequestedSize[index] = size;
148
149 if (bufObj != ctx->Shared->NullBufferObj)
150 bufObj->UsageHistory |= USAGE_TRANSFORM_FEEDBACK_BUFFER;
151 }
152
153 /*** GL_ARB_direct_state_access ***/
154
155 extern void GLAPIENTRY
156 _mesa_TransformFeedbackBufferBase(GLuint xfb, GLuint index, GLuint buffer);
157
158 extern void GLAPIENTRY
159 _mesa_TransformFeedbackBufferRange(GLuint xfb, GLuint index, GLuint buffer,
160 GLintptr offset, GLsizeiptr size);
161
162 extern void GLAPIENTRY
163 _mesa_GetTransformFeedbackiv(GLuint xfb, GLenum pname, GLint *param);
164
165 extern void GLAPIENTRY
166 _mesa_GetTransformFeedbacki_v(GLuint xfb, GLenum pname, GLuint index,
167 GLint *param);
168
169 extern void GLAPIENTRY
170 _mesa_GetTransformFeedbacki64_v(GLuint xfb, GLenum pname, GLuint index,
171 GLint64 *param);
172
173 #endif /* TRANSFORM_FEEDBACK_H */
174