meta: Add a BlitFramebuffers-based implementation of TexSubImage

This meta path, designed for use with PBO's, creates a temporary texture
out of the PBO and uses BlitFramebuffers to do the actual texture upload.

v2 Jason Ekstrand <[email protected]>:
 - Add support for handling simple packing options

v3 Jason Ekstrand <[email protected]>:
 - Refactor to split out the texture-from-pbo code
 - Rename to _mesa_meta_pbo_TexSubImage

Reviewed-by: Neil Roberts <[email protected]>

1 files changed, 9 insertions, 0 deletions

diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h
index c6aef013886..87e9cc92946 100644
--- a/src/mesa/drivers/common/meta.h
+++ b/src/mesa/drivers/common/meta.h
@@ -522,6 +522,15 @@ extern void
 _mesa_meta_GenerateMipmap(struct gl_context *ctx, GLenum target,
                           struct gl_texture_object *texObj);
 
+extern bool
+_mesa_meta_pbo_TexSubImage(struct gl_context *ctx, GLuint dims,
+                           struct gl_texture_image *tex_image,
+                           int xoffset, int yoffset, int zoffset,
+                           int width, int height, int depth,
+                           GLenum format, GLenum type, const void *pixels,
+                           bool allocate_storage, bool create_pbo,
+                           const struct gl_pixelstore_attrib *packing);
+
 extern void
 _mesa_meta_CopyTexSubImage(struct gl_context *ctx, GLuint dims,
                            struct gl_texture_image *texImage,