On Tue, 25 Jun 2019 18:37:46 +0200
Boris Brezillon <boris.brezil...@collabora.com> wrote:
> From: Daniel Stone <dani...@collabora.com>
>
> Add a new DRI2_BufferDamage interface to support the
> EGL_KHR_partial_update extension, informing the driver of an overriding
> scissor region for a particular drawable.
>
> Based on a commit originally authored by:
> Harish Krupo <harish.krupo....@intel.com>
> renamed extension, retargeted at DRI drawable instead of context,
> rewritten description
>
Oops, this patch is missing Daniel's SoB.
> Signed-off-by: Boris Brezillon <boris.brezil...@collabora.com>
> ---
> include/GL/internal/dri_interface.h | 43 +++++++++++++++++++++++++++++
> 1 file changed, 43 insertions(+)
>
> diff --git a/include/GL/internal/dri_interface.h
> b/include/GL/internal/dri_interface.h
> index af0ee9c56670..ada78c5d53d6 100644
> --- a/include/GL/internal/dri_interface.h
> +++ b/include/GL/internal/dri_interface.h
> @@ -85,6 +85,7 @@ typedef struct __DRI2throttleExtensionRec
> __DRI2throttleExtension;
> typedef struct __DRI2fenceExtensionRec __DRI2fenceExtension;
> typedef struct __DRI2interopExtensionRec __DRI2interopExtension;
> typedef struct __DRI2blobExtensionRec __DRI2blobExtension;
> +typedef struct __DRI2bufferDamageExtensionRec __DRI2bufferDamageExtension;
>
> typedef struct __DRIimageLoaderExtensionRec __DRIimageLoaderExtension;
> typedef struct __DRIimageDriverExtensionRec __DRIimageDriverExtension;
> @@ -488,6 +489,48 @@ struct __DRI2interopExtensionRec {
> struct mesa_glinterop_export_out *out);
> };
>
> +
> +/**
> + * Extension for limiting window system back buffer rendering to user-defined
> + * scissor region.
> + */
> +
> +#define __DRI2_BUFFER_DAMAGE "DRI2_BufferDamage"
> +#define __DRI2_BUFFER_DAMAGE_VERSION 1
> +
> +struct __DRI2bufferDamageExtensionRec {
> + __DRIextension base;
> +
> + /**
> + * Provides an array of rectangles representing an overriding scissor
> region
> + * for rendering operations performed to the specified drawable. These
> + * rectangles do not replace client API scissor regions or draw
> + * co-ordinates, but instead inform the driver of the overall bounds of
> all
> + * operations which will be issued before the next flush.
> + *
> + * Any rendering operations writing pixels outside this region to the
> + * drawable will have an undefined effect on the entire drawable.
> + *
> + * This entrypoint may only be called after the drawable has been either
> been
> + * newly created or flushed, and before any rendering operations which
> write
> + * pixels to the drawable. Calling this entrypoint at any other time will
> + * have an undefined effect on the entire drawable.
> + *
> + * Calling this entrypoint with @size 0 and @rects NULL will reset the
> + * region to the buffer's full size. This entrypoint may be called once to
> + * reset the region, followed by a second call with a populated region,
> + * before a rendering call is made.
> + *
> + * Used to implement EGL_KHR_partial_update.
> + *
> + * \param drawable affected drawable
> + * \param size number of rectangles provided
> + * \param rects the array of rectangles, lower-left origin
> + */
> + void (*set_damage_region)(__DRIdrawable *drawable, unsigned int nrects,
> + int *rects);
> +};
> +
> /*@}*/
>
> /**
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