[Mesa-dev] [PATCH 2/4] drisw: use putImageShm if available

[Marc-André Lureau]

If the DRIswrastLoaderExtension implements putImageShm, bind it to
drisw_loader_funcs.
---
 src/gallium/include/state_tracker/drisw_api.h |  3 +++
 src/gallium/state_trackers/dri/drisw.c        | 37 +++++++++++++++++++++------
 2 files changed, 32 insertions(+), 8 deletions(-)

diff --git a/src/gallium/include/state_tracker/drisw_api.h b/src/gallium/include/state_tracker/drisw_api.h
index 328440c..010a603 100644
--- a/src/gallium/include/state_tracker/drisw_api.h
+++ b/src/gallium/include/state_tracker/drisw_api.h
@@ -15,6 +15,9 @@ struct drisw_loader_funcs
                       void *data, unsigned width, unsigned height);
    void (*put_image2) (struct dri_drawable *dri_drawable,
                        void *data, int x, int y, unsigned width, unsigned height, unsigned stride);
+   void (*put_image_shm) (struct dri_drawable *dri_drawable,
+                          int shmid, char *shmaddr, unsigned offset,
+                          int x, int y, unsigned width, unsigned height, unsigned stride);
 };
 
 /**
diff --git a/src/gallium/state_trackers/dri/drisw.c b/src/gallium/state_trackers/dri/drisw.c
index 4a2c1bb..75c8e85e 100644
--- a/src/gallium/state_trackers/dri/drisw.c
+++ b/src/gallium/state_trackers/dri/drisw.c
@@ -26,14 +26,6 @@
  *
  **************************************************************************/
 
-/* TODO:
- *
- * xshm / EGLImage:
- *
- * Allow the loaders to use the XSHM extension. It probably requires callbacks
- * for createImage/destroyImage similar to DRI2 getBuffers.
- */
-
 #include "util/u_format.h"
 #include "util/u_memory.h"
 #include "util/u_inlines.h"
@@ -85,6 +77,19 @@ put_image2(__DRIdrawable *dPriv, void *data, int x, int y,
 }
 
 static INLINE void
+put_image_shm(__DRIdrawable *dPriv, int shmid, char *shmaddr,
+              unsigned offset, int x, int y,
+              unsigned width, unsigned height, unsigned stride)
+{
+   __DRIscreen *sPriv = dPriv->driScreenPriv;
+   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
+
+   loader->putImageShm(dPriv, __DRI_SWRAST_IMAGE_OP_SWAP,
+                       x, y, width, height, stride,
+                       shmid, shmaddr, offset, dPriv->loaderPrivate);
+}
+
+static INLINE void
 get_image(__DRIdrawable *dPriv, int x, int y, int width, int height, void *data)
 {
    __DRIscreen *sPriv = dPriv->driScreenPriv;
@@ -123,6 +128,17 @@ drisw_put_image2(struct dri_drawable *drawable,
    put_image2(dPriv, data, x, y, width, height, stride);
 }
 
+static void
+drisw_put_image_shm(struct dri_drawable *drawable,
+                    int shmid, char *shmaddr, unsigned offset,
+                    int x, int y, unsigned width, unsigned height,
+                    unsigned stride)
+{
+   __DRIdrawable *dPriv = drawable->dPriv;
+
+   put_image_shm(dPriv, shmid, shmaddr, offset, x, y, width, height, stride);
+}
+
 static INLINE void
 drisw_present_texture(__DRIdrawable *dPriv,
                       struct pipe_resource *ptex, struct pipe_box *sub_box)
@@ -345,6 +361,7 @@ static struct drisw_loader_funcs drisw_lf = {
 static const __DRIconfig **
 drisw_init_screen(__DRIscreen * sPriv)
 {
+   const __DRIswrastLoaderExtension *loader = sPriv->swrast_loader;
    const __DRIconfig **configs;
    struct dri_screen *screen;
    struct pipe_screen *pscreen;
@@ -360,6 +377,10 @@ drisw_init_screen(__DRIscreen * sPriv)
 
    sPriv->driverPrivate = (void *)screen;
    sPriv->extensions = drisw_screen_extensions;
+   if (loader->base.version >= 3) {
+      if (loader->putImageShm)
+         drisw_lf.put_image_shm = drisw_put_image_shm;
+   }
 
    pscreen = drisw_create_screen(&drisw_lf);
    /* dri_init_screen_helper checks pscreen for us */
-- 
2.4.2