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authorKristian Høgsberg <krh@bitplanet.net>2012-05-02 15:30:13 -0400
committerKristian Høgsberg <krh@bitplanet.net>2012-05-03 10:57:32 -0400
commit4fddb2ba21add1c1968330e5224ecead59da3995 (patch)
tree20b7a7e683f135f90e2fb5b67f1856e0f038e44b /src/gbm/backends
parentb4789860c4416ba700ac5edeb692b59e33d45276 (diff)
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gbm: Add gbm_bo_write entry point
This new gbm entry point allows writing data into a gbm bo. The bo has to be created with the GBM_BO_USE_WRITE flag, and it's only required to work for GBM_BO_USE_CURSOR_64X64 bos. The gbm API is designed to be the glue layer between EGL and KMS, but there was never a mechanism initialize a buffer suitable for use with KMS hw cursors. The hw cursor bo is typically not compatible with anything EGL can render to, and thus there's no way to get data into such a bo. gbm_bo_write() fills that gap while staying out of the efficient cpu->gpu pixel transfer business. Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com>
Diffstat (limited to 'src/gbm/backends')
-rw-r--r--src/gbm/backends/dri/gbm_dri.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/src/gbm/backends/dri/gbm_dri.c b/src/gbm/backends/dri/gbm_dri.c
index 4df6e8f..e5ddfb6 100644
--- a/src/gbm/backends/dri/gbm_dri.c
+++ b/src/gbm/backends/dri/gbm_dri.c
@@ -291,6 +291,18 @@ gbm_dri_is_format_supported(struct gbm_device *gbm,
return 1;
}
+static int
+gbm_dri_bo_write(struct gbm_bo *_bo, const void *buf, size_t count)
+{
+ struct gbm_dri_device *dri = gbm_dri_device(_bo->gbm);
+ struct gbm_dri_bo *bo = gbm_dri_bo(_bo);
+
+ if (dri->image->base.version < 4)
+ return -1;
+
+ return dri->image->write(bo->image, buf, count);
+}
+
static void
gbm_dri_bo_destroy(struct gbm_bo *_bo)
{
@@ -390,6 +402,9 @@ gbm_dri_bo_create(struct gbm_device *gbm,
int dri_format;
unsigned dri_use = 0;
+ if (dri->image->base.version < 4 && (usage & GBM_BO_USE_WRITE))
+ return NULL;
+
bo = calloc(1, sizeof *bo);
if (bo == NULL)
return NULL;
@@ -421,6 +436,8 @@ gbm_dri_bo_create(struct gbm_device *gbm,
dri_use |= __DRI_IMAGE_USE_SCANOUT;
if (usage & GBM_BO_USE_CURSOR_64X64)
dri_use |= __DRI_IMAGE_USE_CURSOR;
+ if (usage & GBM_BO_USE_WRITE)
+ dri_use |= __DRI_IMAGE_USE_WRITE;
bo->image =
dri->image->createImage(dri->screen,
@@ -491,6 +508,7 @@ dri_device_create(int fd)
dri->base.base.bo_create = gbm_dri_bo_create;
dri->base.base.bo_create_from_egl_image = gbm_dri_bo_create_from_egl_image;
dri->base.base.is_format_supported = gbm_dri_is_format_supported;
+ dri->base.base.bo_write = gbm_dri_bo_write;
dri->base.base.bo_destroy = gbm_dri_bo_destroy;
dri->base.base.destroy = dri_destroy;
dri->base.base.surface_create = gbm_dri_surface_create;