/**
* Delete the given transform feedback objects.
* Part of GL_ARB_transform_feedback2.
*/
void GLAPIENTRY
_mesa_DeleteTransformFeedbacks(GLsizei n, const GLuint *names)
{
GLint i;
GET_CURRENT_CONTEXT(ctx);
if (n < 0) {
_mesa_error(ctx, GL_INVALID_VALUE, "glDeleteTransformFeedbacks(n < 0)");
return;
}
if (!names)
return;
for (i = 0; i < n; i++) {
if (names[i] > 0) {
struct gl_transform_feedback_object *obj
= _mesa_lookup_transform_feedback_object(ctx, names[i]);
if (obj) {
if (obj->Active) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glDeleteTransformFeedbacks(object %u is active)",
names[i]);
return;
}
_mesa_HashRemove(ctx->TransformFeedback.Objects, names[i]);
/* unref, but object may not be deleted until later */
reference_transform_feedback_object(&obj, NULL);
}
}
}
}
/**
* Bind the given transform feedback object.
* Part of GL_ARB_transform_feedback2.
*/
void GLAPIENTRY
_mesa_BindTransformFeedback(GLenum target, GLuint name)
{
struct gl_transform_feedback_object *obj;
GET_CURRENT_CONTEXT(ctx);
if (target != GL_TRANSFORM_FEEDBACK) {
_mesa_error(ctx, GL_INVALID_ENUM, "glBindTransformFeedback(target)");
return;
}
if (_mesa_is_xfb_active_and_unpaused(ctx)) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindTransformFeedback(transform is active, or not paused)");
return;
}
obj = _mesa_lookup_transform_feedback_object(ctx, name);
if (!obj) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"glBindTransformFeedback(name=%u)", name);
return;
}
reference_transform_feedback_object(&ctx->TransformFeedback.CurrentObject,
obj);
}
/**
* Is the given ID a transform feedback object?
* Part of GL_ARB_transform_feedback2.
*/
GLboolean GLAPIENTRY
_mesa_IsTransformFeedback(GLuint name)
{
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
if (name && _mesa_lookup_transform_feedback_object(ctx, name))
return GL_TRUE;
else
return GL_FALSE;
}
static void GLAPIENTRY
vbo_exec_DrawTransformFeedbackStream(GLenum mode, GLuint name, GLuint stream)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_transform_feedback_object *obj =
_mesa_lookup_transform_feedback_object(ctx, name);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawTransformFeedbackStream(%s, %u, %u)\n",
_mesa_lookup_enum_by_nr(mode), name, stream);
vbo_draw_transform_feedback(ctx, mode, obj, stream, 1);
}
/**
* Wrapper around lookup_transform_feedback_object that throws
* GL_INVALID_OPERATION if id is not in the hash table. After calling
* _mesa_error, it returns NULL.
*/
static struct gl_transform_feedback_object *
lookup_transform_feedback_object_err(struct gl_context *ctx,
GLuint xfb, const char* func)
{
struct gl_transform_feedback_object *obj;
obj = _mesa_lookup_transform_feedback_object(ctx, xfb);
if (!obj) {
_mesa_error(ctx, GL_INVALID_OPERATION,
"%s(xfb=%u: non-generated object name)", func, xfb);
}
return obj;
}
static void GLAPIENTRY
vbo_exec_DrawTransformFeedbackInstanced(GLenum mode, GLuint name,
GLsizei primcount)
{
GET_CURRENT_CONTEXT(ctx);
struct gl_transform_feedback_object *obj =
_mesa_lookup_transform_feedback_object(ctx, name);
if (MESA_VERBOSE & VERBOSE_DRAW)
_mesa_debug(ctx, "glDrawTransformFeedbackInstanced(%s, %d)\n",
_mesa_lookup_enum_by_nr(mode), name);
vbo_draw_transform_feedback(ctx, mode, obj, 0, primcount);
}
/**
* Is the given ID a transform feedback object?
* Part of GL_ARB_transform_feedback2.
*/
GLboolean GLAPIENTRY
_mesa_IsTransformFeedback(GLuint name)
{
struct gl_transform_feedback_object *obj;
GET_CURRENT_CONTEXT(ctx);
ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, GL_FALSE);
if (name == 0)
return GL_FALSE;
obj = _mesa_lookup_transform_feedback_object(ctx, name);
if (obj == NULL)
return GL_FALSE;
return obj->EverBound;
}
