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dri_interface: add DRI2_BufferDamage interface

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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.kps@intel.com>
renamed extension, retargeted at DRI drawable instead of context,
rewritten description

Signed-off-by: Daniel Stone <daniels@collabora.com>
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Reviewed-by: Qiang Yu <yuq825@gmail.com>
Tested-by: Qiang Yu <yuq825@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
This commit is contained in:
Daniel Stone
2019-08-12 12:07:05 +02:00
committed by Boris Brezillon
parent b4345da876
commit bd08a83b09
1 changed files with 43 additions and 0 deletions
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43
include/GL/internal/dri_interface.h
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@@ -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 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 @nrects 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 nrects number of rectangles provided
* \param rects the array of rectangles, lower-left origin
*/
void (*set_damage_region)(__DRIdrawable *drawable, unsigned int nrects,
int *rects);
};
/*@}*/
/**