This function can be used by igt_draw to get accurate
tile dimensions for all tile formats.
v2: Added comments to function igt_get_fb_tile_size (Daniel)
Signed-off-by: Praveen Paneri <praveen.paneri@xxxxxxxxx>
---
lib/igt_fb.c | 16 +++++++++++++---
lib/igt_fb.h | 3 ++-
2 files changed, 15 insertions(+), 4 deletions(-)
diff --git a/lib/igt_fb.c b/lib/igt_fb.c
index d2b7e9e..9ba1e3b 100644
--- a/lib/igt_fb.c
+++ b/lib/igt_fb.c
@@ -73,9 +73,19 @@ static struct format_desc_struct {
#define for_each_format(f) \
for (f = format_desc; f - format_desc < ARRAY_SIZE(format_desc); f++)
-
-static void igt_get_fb_tile_size(int fd, uint64_t tiling, int fb_bpp,
- unsigned *width_ret, unsigned *height_ret)
+/**
+ * igt_get_fb_tile_size:
+ * @fd: The DRM file descriptor
+ * @tiling: Tiling layout of the framebuffer (as framebuffer modifier)
+ * @fb_bpp: Bytes per pixel of the framebuffer
+ * @width_ret: Width of the tile in pixels
+ * @height_ret: Height of the tile in pixels
+ *
+ * This function returns width and height of a tile based on the given tiling
+ * format.
+ */
+void igt_get_fb_tile_size(int fd, uint64_t tiling, int fb_bpp,
+ unsigned *width_ret, unsigned *height_ret)
{
switch (tiling) {
case LOCAL_DRM_FORMAT_MOD_NONE:
diff --git a/lib/igt_fb.h b/lib/igt_fb.h
index 4a680ce..414cb3d 100644
--- a/lib/igt_fb.h
+++ b/lib/igt_fb.h
@@ -94,7 +94,8 @@ enum igt_text_align {
align_vcenter = 0x04,
align_hcenter = 0x08,
};
-
+void igt_get_fb_tile_size(int fd, uint64_t tiling, int fb_bpp,
+ unsigned *width_ret, unsigned *height_ret);
void igt_calc_fb_size(int fd, int width, int height, int bpp, uint64_t tiling,
unsigned *size_ret, unsigned *stride_ret);
unsigned int
--
1.9.1
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