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wayland: Add a convenience function to update a region from SHM buffer
Adds cogl_wayland_texture_set_region_from_shm_buffer which is a convenience wrapper around cogl_texture_set_region but it uses the correct format to copy the data from a Wayland SHM buffer. This will typically be used by compositors to update the texture for a surface when an SHM buffer is attached. The ordering of the arguments is based on cogl_texture_set_region_from_bitmap. Based on a patch by Jasper St. Pierre. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit c76c1d136d2cac7f3d1331a4d1dc0dd0f06e812c) Conflicts: examples/cogland.c
This commit is contained in:
Neil Roberts
parent
5ef1020e8a
commit
a29b8c475e
@ -293,6 +293,75 @@ _cogl_egl_texture_2d_new_from_image (CoglContext *ctx,
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#endif /* defined (COGL_HAS_EGL_SUPPORT) && defined (EGL_KHR_image_base) */
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#ifdef COGL_HAS_WAYLAND_EGL_SERVER_SUPPORT
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static void
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shm_buffer_get_cogl_pixel_format (struct wl_shm_buffer *shm_buffer,
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CoglPixelFormat *format_out,
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CoglPixelFormat *internal_format_out)
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{
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CoglPixelFormat format;
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CoglPixelFormat internal_format = COGL_PIXEL_FORMAT_ANY;
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switch (wl_shm_buffer_get_format (shm_buffer))
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{
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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case WL_SHM_FORMAT_ARGB8888:
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format = COGL_PIXEL_FORMAT_ARGB_8888_PRE;
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break;
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case WL_SHM_FORMAT_XRGB8888:
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format = COGL_PIXEL_FORMAT_ARGB_8888;
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internal_format = COGL_PIXEL_FORMAT_RGB_888;
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break;
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#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
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case WL_SHM_FORMAT_ARGB8888:
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format = COGL_PIXEL_FORMAT_BGRA_8888_PRE;
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break;
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case WL_SHM_FORMAT_XRGB8888:
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format = COGL_PIXEL_FORMAT_BGRA_8888;
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internal_format = COGL_PIXEL_FORMAT_BGR_888;
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break;
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#endif
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default:
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g_warn_if_reached ();
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format = COGL_PIXEL_FORMAT_ARGB_8888;
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}
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if (format_out)
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*format_out = format;
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if (internal_format_out)
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*internal_format_out = internal_format;
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}
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CoglBool
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cogl_wayland_texture_set_region_from_shm_buffer (CoglTexture *texture,
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int src_x,
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int src_y,
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int width,
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int height,
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struct wl_shm_buffer *
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shm_buffer,
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int dst_x,
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int dst_y,
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int level,
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CoglError **error)
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{
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const uint8_t *data = wl_shm_buffer_get_data (shm_buffer);
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int32_t stride = wl_shm_buffer_get_stride (shm_buffer);
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CoglPixelFormat format;
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int bpp;
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shm_buffer_get_cogl_pixel_format (shm_buffer, &format, NULL);
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bpp = _cogl_pixel_format_get_bytes_per_pixel (format);
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return _cogl_texture_set_region (COGL_TEXTURE (texture),
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width, height,
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format,
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stride,
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data + src_x * bpp + src_y * stride,
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dst_x, dst_y,
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level,
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error);
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}
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CoglTexture2D *
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cogl_wayland_texture_2d_new_from_buffer (CoglContext *ctx,
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struct wl_resource *buffer,
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@ -305,34 +374,11 @@ cogl_wayland_texture_2d_new_from_buffer (CoglContext *ctx,
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if (shm_buffer)
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{
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int stride = wl_shm_buffer_get_stride (shm_buffer);
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CoglPixelFormat format;
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CoglPixelFormat internal_format = COGL_PIXEL_FORMAT_ANY;
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int width = wl_shm_buffer_get_width (shm_buffer);
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int height = wl_shm_buffer_get_height (shm_buffer);
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CoglPixelFormat format, internal_format;
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switch (wl_shm_buffer_get_format (shm_buffer))
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{
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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case WL_SHM_FORMAT_ARGB8888:
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format = COGL_PIXEL_FORMAT_ARGB_8888_PRE;
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break;
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case WL_SHM_FORMAT_XRGB8888:
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format = COGL_PIXEL_FORMAT_ARGB_8888;
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internal_format = COGL_PIXEL_FORMAT_RGB_888;
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break;
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#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
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case WL_SHM_FORMAT_ARGB8888:
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format = COGL_PIXEL_FORMAT_BGRA_8888_PRE;
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break;
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case WL_SHM_FORMAT_XRGB8888:
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format = COGL_PIXEL_FORMAT_BGRA_8888;
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internal_format = COGL_PIXEL_FORMAT_BGR_888;
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break;
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#endif
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default:
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g_warn_if_reached ();
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format = COGL_PIXEL_FORMAT_ARGB_8888;
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}
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shm_buffer_get_cogl_pixel_format (shm_buffer, &format, &internal_format);
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return cogl_texture_2d_new_from_data (ctx,
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width, height,
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@ -95,6 +95,50 @@ cogl_wayland_texture_2d_new_from_buffer (CoglContext *ctx,
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struct wl_resource *buffer,
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CoglError **error);
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/**
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* cogl_wayland_texture_set_region_from_shm_buffer:
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* @texture: a #CoglTexture
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* @width: The width of the region to copy
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* @height: The height of the region to copy
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* @shm_buffer: The source buffer
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* @src_x: The X offset within the source bufer to copy from
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* @src_y: The Y offset within the source bufer to copy from
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* @dst_x: The X offset within the texture to copy to
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* @dst_y: The Y offset within the texture to copy to
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* @level: The mipmap level of the texture to copy to
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* @error: A #CoglError to return exceptional errors
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*
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* Sets the pixels in a rectangular subregion of @texture from a
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* Wayland SHM buffer. Generally this would be used in response to
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* wl_surface.damage event in a compositor in order to update the
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* texture with the damaged region. This is just a convenience wrapper
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* around getting the SHM buffer pointer and calling
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* cogl_texture_set_region(). See that function for a description of
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* the level parameter.
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*
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* <note>Since the storage for a #CoglTexture is allocated lazily then
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* if the given @texture has not previously been allocated then this
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* api can return %FALSE and throw an exceptional @error if there is
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* not enough memory to allocate storage for @texture.</note>
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*
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* Return value: %TRUE if the subregion upload was successful, and
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* %FALSE otherwise
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* Since: 1.18
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* Stability: unstable
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*/
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CoglBool
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cogl_wayland_texture_set_region_from_shm_buffer (CoglTexture *texture,
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int src_x,
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int src_y,
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int width,
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int height,
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struct wl_shm_buffer *
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shm_buffer,
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int dst_x,
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int dst_y,
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int level,
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CoglError **error);
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COGL_END_DECLS
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/* The gobject introspection scanner seems to parse public headers in
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@ -445,42 +445,14 @@ surface_damaged (CoglandSurface *surface,
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wl_shm_buffer_get (surface->buffer_ref.buffer->resource);
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if (shm_buffer)
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{
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CoglPixelFormat format;
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int stride = wl_shm_buffer_get_stride (shm_buffer);
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const uint8_t *data = wl_shm_buffer_get_data (shm_buffer);
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switch (wl_shm_buffer_get_format (shm_buffer))
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{
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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case WL_SHM_FORMAT_ARGB8888:
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format = COGL_PIXEL_FORMAT_ARGB_8888_PRE;
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break;
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case WL_SHM_FORMAT_XRGB8888:
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format = COGL_PIXEL_FORMAT_ARGB_8888;
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break;
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#elif G_BYTE_ORDER == G_LITTLE_ENDIAN
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case WL_SHM_FORMAT_ARGB8888:
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format = COGL_PIXEL_FORMAT_BGRA_8888_PRE;
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break;
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case WL_SHM_FORMAT_XRGB8888:
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format = COGL_PIXEL_FORMAT_BGRA_8888;
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break;
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#endif
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default:
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g_warn_if_reached ();
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format = COGL_PIXEL_FORMAT_ARGB_8888;
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}
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cogl_texture_set_region (surface->texture,
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x, y, /* src_x/y */
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x, y, /* dst_x/y */
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width, height, /* dst_width/height */
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width, height, /* width/height */
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format,
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stride,
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data);
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}
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cogl_wayland_texture_set_region_from_shm_buffer (surface->texture,
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x, y,
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width,
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height,
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shm_buffer,
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x, y,
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0, /* level */
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NULL);
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}
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cogland_queue_redraw (surface->compositor);
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