diff options
author | Brian Paul <brianp@vmware.com> | 2010-05-10 21:11:21 -0600 |
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committer | Brian Paul <brianp@vmware.com> | 2010-05-10 21:11:25 -0600 |
commit | fef6e36e0736a68e24d7844bae65a01de8359214 (patch) | |
tree | e5d9abc8125f9166c55efe22dc11309099e1394c /src/mesa/state_tracker/st_cb_xformfb.c | |
parent | 12bc39f30c2cc27fe9bc4d33c7c79919d895537d (diff) |
mesa: more transform feedback infrastructure
Includes GL_ARB_transform_feedback2 which encapsulates transform feedback
state in objects.
Diffstat (limited to 'src/mesa/state_tracker/st_cb_xformfb.c')
-rw-r--r-- | src/mesa/state_tracker/st_cb_xformfb.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/src/mesa/state_tracker/st_cb_xformfb.c b/src/mesa/state_tracker/st_cb_xformfb.c new file mode 100644 index 0000000000..fb48b57eb5 --- /dev/null +++ b/src/mesa/state_tracker/st_cb_xformfb.c @@ -0,0 +1,129 @@ +/************************************************************************** + * + * Copyright 2010 VMware, Inc. + * All Rights Reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a + * copy of this software and associated documentation files (the + * "Software"), to deal in the Software without restriction, including + * without limitation the rights to use, copy, modify, merge, publish, + * distribute, sub license, and/or sell copies of the Software, and to + * permit persons to whom the Software is furnished to do so, subject to + * the following conditions: + * + * The above copyright notice and this permission notice (including the + * next paragraph) shall be included in all copies or substantial portions + * of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS + * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, + * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE + * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + * + **************************************************************************/ + + +/** + * Transform feedback functions. + * + * \author Brian Paul + */ + + +#include "main/imports.h" +#include "main/context.h" +#include "main/transformfeedback.h" + +#include "st_cb_xformfb.h" + + +#if 0 +static struct gl_transform_feedback_object * +st_new_transform_feedback(GLcontext *ctx, GLuint name) +{ + struct gl_transform_feedback_object *obj; + obj = CALLOC_STRUCT(gl_transform_feedback_object); + if (obj) { + obj->Name = name; + obj->RefCount = 1; + } + return obj; +} +#endif + +#if 0 +static void +st_delete_transform_feedback(GLcontext *ctx, + struct gl_transform_feedback_object *obj) +{ + GLuint i; + + for (i = 0; i < Elements(obj->Buffers); i++) { + _mesa_reference_buffer_object(ctx, &obj->Buffers[i], NULL); + } + + free(obj); +} +#endif + + +static void +st_begin_transform_feedback(GLcontext *ctx, GLenum mode, + struct gl_transform_feedback_object *obj) +{ + /* to-do */ +} + + +static void +st_end_transform_feedback(GLcontext *ctx, + struct gl_transform_feedback_object *obj) +{ + /* to-do */ +} + + +static void +st_pause_transform_feedback(GLcontext *ctx, + struct gl_transform_feedback_object *obj) +{ + /* to-do */ +} + + +static void +st_resume_transform_feedback(GLcontext *ctx, + struct gl_transform_feedback_object *obj) +{ + /* to-do */ +} + + +static void +st_draw_transform_feedback(GLcontext *ctx, GLenum mode, + struct gl_transform_feedback_object *obj) +{ + /* XXX to do */ + /* + * Get number of vertices in obj's feedback buffer. + * Call ctx->Exec.DrawArrays(mode, 0, count); + */ +} + + +void +st_init_xformfb_functions(struct dd_function_table *functions) +{ + /* let core Mesa plug in its functions */ + _mesa_init_transform_feedback_functions(functions); + + /* then override a few: */ + functions->BeginTransformFeedback = st_begin_transform_feedback; + functions->EndTransformFeedback = st_end_transform_feedback; + functions->PauseTransformFeedback = st_pause_transform_feedback; + functions->ResumeTransformFeedback = st_resume_transform_feedback; + functions->DrawTransformFeedback = st_draw_transform_feedback; +} |