diff options
| -rw-r--r-- | src/mesa/vbo/vbo_save_api.c | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/src/mesa/vbo/vbo_save_api.c b/src/mesa/vbo/vbo_save_api.c index b5f9517872f..411c0060480 100644 --- a/src/mesa/vbo/vbo_save_api.c +++ b/src/mesa/vbo/vbo_save_api.c @@ -237,16 +237,31 @@ GLfloat * vbo_save_map_vertex_store(struct gl_context *ctx, struct vbo_save_vertex_store *vertex_store) { + const GLbitfield access = (GL_MAP_WRITE_BIT | + GL_MAP_INVALIDATE_RANGE_BIT | + GL_MAP_UNSYNCHRONIZED_BIT | + GL_MAP_FLUSH_EXPLICIT_BIT); + assert(vertex_store->bufferobj); - assert(!vertex_store->buffer); + assert(!vertex_store->buffer); /* the buffer should not be mapped */ + if (vertex_store->bufferobj->Size > 0) { - vertex_store->buffer = - (GLfloat *) ctx->Driver.MapBufferRange(ctx, 0, - vertex_store->bufferobj->Size, - GL_MAP_WRITE_BIT, /* not used */ - vertex_store->bufferobj); - assert(vertex_store->buffer); - return vertex_store->buffer + vertex_store->used; + /* Map the remaining free space in the VBO */ + GLintptr offset = vertex_store->used * sizeof(GLfloat); + GLsizeiptr size = vertex_store->bufferobj->Size - offset; + GLfloat *range = (GLfloat *) + ctx->Driver.MapBufferRange(ctx, offset, size, access, + vertex_store->bufferobj); + if (range) { + /* compute address of start of whole buffer (needed elsewhere) */ + vertex_store->buffer = range - vertex_store->used; + assert(vertex_store->buffer); + return range; + } + else { + vertex_store->buffer = NULL; + return NULL; + } } else { /* probably ran out of memory for buffers */ @@ -260,6 +275,14 @@ vbo_save_unmap_vertex_store(struct gl_context *ctx, struct vbo_save_vertex_store *vertex_store) { if (vertex_store->bufferobj->Size > 0) { + GLintptr offset = 0; + GLsizeiptr length = vertex_store->used * sizeof(GLfloat) + - vertex_store->bufferobj->Offset; + + /* Explicitly flush the region we wrote to */ + ctx->Driver.FlushMappedBufferRange(ctx, offset, length, + vertex_store->bufferobj); + ctx->Driver.UnmapBuffer(ctx, vertex_store->bufferobj); } vertex_store->buffer = NULL; |