cogl/dma-buf-handle: Pass more metadata to handle constructor

Could be useful would one want to mmap the dmabuf and deal with its
content manually in CPU space.

https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/1237

cogl/cogl/cogl-dma-buf-handle.c

@@ -40,6 +40,11 @@ struct _CoglDmaBufHandle
 {
   CoglFramebuffer *framebuffer;
   int dmabuf_fd;
+  int width;
+  int height;
+  int stride;
+  int offset;
+  int bpp;
   gpointer user_data;
   GDestroyNotify destroy_func;
 };
@@ -47,6 +52,11 @@ struct _CoglDmaBufHandle
 CoglDmaBufHandle *
 cogl_dma_buf_handle_new (CoglFramebuffer *framebuffer,
                          int              dmabuf_fd,
+                         int              width,
+                         int              height,
+                         int              stride,
+                         int              offset,
+                         int              bpp,
                          gpointer         user_data,
                          GDestroyNotify   destroy_func)
 {
@@ -61,6 +71,12 @@ cogl_dma_buf_handle_new (CoglFramebuffer *framebuffer,
   dmabuf_handle->user_data = user_data;
   dmabuf_handle->destroy_func = destroy_func;
 
+  dmabuf_handle->width = width;
+  dmabuf_handle->height = height;
+  dmabuf_handle->stride = stride;
+  dmabuf_handle->offset = offset;
+  dmabuf_handle->bpp = bpp;
+
   return dmabuf_handle;
 }
 
@@ -92,3 +108,32 @@ cogl_dma_buf_handle_get_fd (CoglDmaBufHandle *dmabuf_handle)
   return dmabuf_handle->dmabuf_fd;
 }
 
+int
+cogl_dma_buf_handle_get_width (CoglDmaBufHandle *dmabuf_handle)
+{
+  return dmabuf_handle->width;
+}
+
+int
+cogl_dma_buf_handle_get_height (CoglDmaBufHandle *dmabuf_handle)
+{
+  return dmabuf_handle->height;
+}
+
+int
+cogl_dma_buf_handle_get_stride (CoglDmaBufHandle *dmabuf_handle)
+{
+  return dmabuf_handle->stride;
+}
+
+int
+cogl_dma_buf_handle_get_offset (CoglDmaBufHandle *dmabuf_handle)
+{
+  return dmabuf_handle->offset;
+}
+
+int
+cogl_dma_buf_handle_get_bpp (CoglDmaBufHandle *dmabuf_handle)
+{
+  return dmabuf_handle->bpp;
+}

cogl/cogl/cogl-dma-buf-handle.h

@@ -46,7 +46,12 @@
 COGL_EXPORT CoglDmaBufHandle *
 cogl_dma_buf_handle_new (CoglFramebuffer *framebuffer,
                          int              dmabuf_fd,
-                         gpointer         data,
+                         int              width,
+                         int              height,
+                         int              stride,
+                         int              offset,
+                         int              bpp,
+                         gpointer         user_data,
                          GDestroyNotify   destroy_func);
 
 /**
@@ -79,5 +84,44 @@ cogl_dma_buf_handle_get_framebuffer (CoglDmaBufHandle *dmabuf_handle);
 COGL_EXPORT int
 cogl_dma_buf_handle_get_fd (CoglDmaBufHandle *dmabuf_handle);
 
+/**
+ * cogl_dmabuf_handle_get_width: (skip)
+ *
+ * Returns: the buffer width
+ */
+COGL_EXPORT int
+cogl_dma_buf_handle_get_width (CoglDmaBufHandle *dmabuf_handle);
+
+/**
+ * cogl_dmabuf_handle_get_height: (skip)
+ *
+ * Returns: the buffer height
+ */
+COGL_EXPORT int
+cogl_dma_buf_handle_get_height (CoglDmaBufHandle *dmabuf_handle);
+
+/**
+ * cogl_dmabuf_handle_get_stride: (skip)
+ *
+ * Returns: the buffer stride
+ */
+COGL_EXPORT int
+cogl_dma_buf_handle_get_stride (CoglDmaBufHandle *dmabuf_handle);
+
+/**
+ * cogl_dmabuf_handle_get_offset: (skip)
+ *
+ * Returns: the buffer offset
+ */
+COGL_EXPORT int
+cogl_dma_buf_handle_get_offset (CoglDmaBufHandle *dmabuf_handle);
+
+/**
+ * cogl_dmabuf_handle_get_bpp: (skip)
+ *
+ * Returns: the number of bytes per pixel
+ */
+COGL_EXPORT int
+cogl_dma_buf_handle_get_bpp (CoglDmaBufHandle *dmabuf_handle);
 
 #endif /* __COGL_DMA_BUF_HANDLE_H__ */

src/backends/native/meta-renderer-native.c

@@ -2169,6 +2169,9 @@ meta_renderer_native_create_dma_buf (CoglRenderer  *cogl_renderer,
       {
         CoglFramebuffer *dmabuf_fb;
         struct gbm_bo *new_bo;
+        int stride;
+        int offset;
+        int bpp;
         int dmabuf_fd = -1;
 
         new_bo = gbm_bo_create (renderer_gpu_data->gbm.device,
@@ -2192,11 +2195,14 @@ meta_renderer_native_create_dma_buf (CoglRenderer  *cogl_renderer,
             return NULL;
           }
 
+        stride = gbm_bo_get_stride (new_bo);
+        offset = gbm_bo_get_offset (new_bo, 0);
+        bpp = 4;
         dmabuf_fb = create_dma_buf_framebuffer (renderer_native,
                                                 dmabuf_fd,
                                                 width, height,
-                                                gbm_bo_get_stride (new_bo),
+                                                stride,
-                                                gbm_bo_get_offset (new_bo, 0),
+                                                offset,
                                                 DRM_FORMAT_MOD_LINEAR,
                                                 DRM_FORMAT_XRGB8888,
                                                 error);
@@ -2204,7 +2210,9 @@ meta_renderer_native_create_dma_buf (CoglRenderer  *cogl_renderer,
         if (!dmabuf_fb)
           return NULL;
 
-        return cogl_dma_buf_handle_new (dmabuf_fb, dmabuf_fd, new_bo,
+        return cogl_dma_buf_handle_new (dmabuf_fb, dmabuf_fd,
+                                        width, height, stride, offset, bpp,
+                                        new_bo,
                                         (GDestroyNotify) gbm_bo_destroy);
       }
       break;