diff options
Diffstat (limited to 'source/blender/gpu/intern/gpu_vertex_buffer.c')
| -rw-r--r-- | source/blender/gpu/intern/gpu_vertex_buffer.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/source/blender/gpu/intern/gpu_vertex_buffer.c b/source/blender/gpu/intern/gpu_vertex_buffer.c index 25daabe601d..3b4d469542c 100644 --- a/source/blender/gpu/intern/gpu_vertex_buffer.c +++ b/source/blender/gpu/intern/gpu_vertex_buffer.c @@ -85,6 +85,35 @@ void GPU_vertbuf_init_with_format_ex(GPUVertBuf *verts, } } +GPUVertBuf *GPU_vertbuf_duplicate(GPUVertBuf *verts) +{ + GPUVertBuf *verts_dst = GPU_vertbuf_create(GPU_USAGE_STATIC); + /* Full copy. */ + *verts_dst = *verts; + GPU_vertformat_copy(&verts_dst->format, &verts->format); + + if (verts->vbo_id) { + uint buffer_sz = GPU_vertbuf_size_get(verts); + + verts_dst->vbo_id = GPU_buf_alloc(); + + glBindBuffer(GL_COPY_READ_BUFFER, verts->vbo_id); + glBindBuffer(GL_COPY_WRITE_BUFFER, verts_dst->vbo_id); + + glBufferData(GL_COPY_WRITE_BUFFER, buffer_sz, NULL, convert_usage_type_to_gl(verts->usage)); + + glCopyBufferSubData(GL_COPY_READ_BUFFER, GL_COPY_WRITE_BUFFER, 0, 0, buffer_sz); +#if VRAM_USAGE + vbo_memory_usage += GPU_vertbuf_size_get(verts); +#endif + } + + if (verts->data) { + verts_dst->data = MEM_dupallocN(verts->data); + } + return verts_dst; +} + /** Same as discard but does not free. */ void GPU_vertbuf_clear(GPUVertBuf *verts) { |