Add mapImage and unmapImage functions to DRIimage extension for mapping
and unmapping DRIimages for CPU access. The caller provides the region of
the image to map and is returned a pointer to the beginning of the region
and the stride (which could be different from the original).
Signed-off-by: Rob Herring <r...@kernel.org>
---
include/GL/internal/dri_interface.h | 24 +++++++++++++++++++++++-
1 file changed, 23 insertions(+), 1 deletion(-)
diff --git a/include/GL/internal/dri_interface.h
b/include/GL/internal/dri_interface.h
index b38f87f..082dc10 100644
--- a/include/GL/internal/dri_interface.h
+++ b/include/GL/internal/dri_interface.h
@@ -1094,7 +1094,7 @@ struct __DRIdri2ExtensionRec {
* extensions.
*/
#define __DRI_IMAGE "DRI_IMAGE"
-#define __DRI_IMAGE_VERSION 11
+#define __DRI_IMAGE_VERSION 12
/**
* These formats correspond to the similarly named MESA_FORMAT_*
@@ -1133,6 +1133,11 @@ struct __DRIdri2ExtensionRec {
#define __DRI_IMAGE_USE_BACKBUFFER 0x0010
+#define __DRI_IMAGE_TRANSFER_READ 0x1
+#define __DRI_IMAGE_TRANSFER_WRITE 0x2
+#define __DRI_IMAGE_TRANSFER_READ_WRITE \
+ (__DRI_IMAGE_TRANSFER_READ | __DRI_IMAGE_TRANSFER_WRITE)
+
/**
* Four CC formats that matches with WL_DRM_FORMAT_* from wayland_drm.h,
* GBM_FORMAT_* from gbm.h, and DRM_FORMAT_* from drm_fourcc.h. Used with
@@ -1381,6 +1386,23 @@ struct __DRIimageExtensionRec {
* \since 10
*/
int (*getCapabilities)(__DRIscreen *screen);
+
+ /**
+ * Map specified region of a __DRIimage for specified usage
+ *
+ * \since 12
+ */
+ void *(*mapImage)(__DRIcontext *context, __DRIimage *image,
+ int x0, int y0, int width, int height,
+ unsigned int flags, int *stride, void **data);
+
+ /**
+ * Unmap a previously mapped __DRIimage
+ *
+ * \since 12
+ */
+ void (*unmapImage)(__DRIcontext *context, __DRIimage *image, void *data);
+
};
--
2.7.4
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