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authorBrian <brian.paul@tungstengraphics.com>2007-08-17 15:26:33 +0100
committerBrian <brian.paul@tungstengraphics.com>2007-08-17 15:26:33 +0100
commit5568a7d30120d830c93494a7b3382bfa8b4d2800 (patch)
treea8806270fd64c908d116ba44bbff4756bf576808 /src/mesa/vbo/vbo_exec_api.c
parent48b09322ee1b701558e1f223320cd2a9259bb37f (diff)
added vbo_use_buffer_objects() to specify that immediate mode data should be put into bufferobjects
Diffstat (limited to 'src/mesa/vbo/vbo_exec_api.c')
-rw-r--r--src/mesa/vbo/vbo_exec_api.c35
1 files changed, 35 insertions, 0 deletions
diff --git a/src/mesa/vbo/vbo_exec_api.c b/src/mesa/vbo/vbo_exec_api.c
index 7f56b3b629..24e2eba472 100644
--- a/src/mesa/vbo/vbo_exec_api.c
+++ b/src/mesa/vbo/vbo_exec_api.c
@@ -631,6 +631,41 @@ static void vbo_exec_vtxfmt_init( struct vbo_exec_context *exec )
}
+/**
+ * Tell the VBO module to use a real OpenGL vertex buffer object to
+ * store accumulated immediate-mode vertex data.
+ * This replaces the malloced buffer which was created in
+ * vb_exec_vtx_init() below.
+ */
+void vbo_use_buffer_objects(GLcontext *ctx)
+{
+ struct vbo_exec_context *exec = &vbo_context(ctx)->exec;
+ /* Any buffer name but 0 can be used here since this bufferobj won't
+ * go into the bufferobj hashtable.
+ */
+ GLuint bufName = 0xaabbccdd;
+ GLenum target = GL_ARRAY_BUFFER_ARB;
+ GLenum access = GL_READ_WRITE_ARB;
+ GLenum usage = GL_STREAM_DRAW_ARB;
+ GLsizei size = VBO_VERT_BUFFER_SIZE * sizeof(GLfloat);
+
+ /* Make sure this func is only used once */
+ assert(exec->vtx.bufferobj == ctx->Array.NullBufferObj);
+ if (exec->vtx.buffer_map) {
+ _mesa_align_free(exec->vtx.buffer_map);
+ }
+
+ /* Allocate a real buffer object now */
+ exec->vtx.bufferobj = ctx->Driver.NewBufferObject(ctx, bufName, target);
+ ctx->Driver.BufferData(ctx, target, size, NULL, usage, exec->vtx.bufferobj);
+
+ /* and map it */
+ exec->vtx.buffer_map
+ = ctx->Driver.MapBuffer(ctx, target, access, exec->vtx.bufferobj);
+}
+
+
+
void vbo_exec_vtx_init( struct vbo_exec_context *exec )
{
GLcontext *ctx = exec->ctx;