diff options
Diffstat (limited to 'gpu_buffer/src/lib.rs')
| -rw-r--r-- | gpu_buffer/src/lib.rs | 96 |
1 files changed, 96 insertions, 0 deletions
diff --git a/gpu_buffer/src/lib.rs b/gpu_buffer/src/lib.rs index 449ab53..a75159e 100644 --- a/gpu_buffer/src/lib.rs +++ b/gpu_buffer/src/lib.rs @@ -36,6 +36,7 @@ extern crate sys_util; pub mod rendernode; mod raw; +mod drm_formats; use std::os::raw::c_void; use std::fmt; @@ -49,6 +50,7 @@ use std::result::Result; use data_model::VolatileSlice; use raw::*; +use drm_formats::*; const MAP_FAILED: *mut c_void = (-1isize as *mut _); @@ -78,6 +80,78 @@ impl Format { let f = self.0; [f as u8, (f >> 8) as u8, (f >> 16) as u8, (f >> 24) as u8] } + + /// Returns the number of bytes per pixel for the given plane, suitable for making copies + /// to/from the plane. + pub fn bytes_per_pixel(&self, plane: usize) -> Option<usize> { + let b = self.to_bytes(); + + // NV12 and NV21 have 2 planes with 1 byte per pixel. + if (b == DRM_FORMAT_NV12 || b == DRM_FORMAT_NV21) && plane < 2 { + return Some(1); + } + + // YVU420 has 3 planes, all with the same 1 byte per pixel. + if b == DRM_FORMAT_YVU420 && plane < 3 { + return Some(1); + } + + if plane != 0 { + return None; + } + + let bpp = match self.to_bytes() { + DRM_FORMAT_BGR233 => 1, + DRM_FORMAT_C8 => 1, + DRM_FORMAT_R8 => 1, + DRM_FORMAT_RGB332 => 1, + DRM_FORMAT_ABGR1555 => 2, + DRM_FORMAT_ABGR4444 => 2, + DRM_FORMAT_ARGB1555 => 2, + DRM_FORMAT_ARGB4444 => 2, + DRM_FORMAT_BGR565 => 2, + DRM_FORMAT_BGRA4444 => 2, + DRM_FORMAT_BGRA5551 => 2, + DRM_FORMAT_BGRX4444 => 2, + DRM_FORMAT_BGRX5551 => 2, + DRM_FORMAT_GR88 => 2, + DRM_FORMAT_RG88 => 2, + DRM_FORMAT_RGB565 => 2, + DRM_FORMAT_RGBA4444 => 2, + DRM_FORMAT_RGBA5551 => 2, + DRM_FORMAT_RGBX4444 => 2, + DRM_FORMAT_RGBX5551 => 2, + DRM_FORMAT_UYVY => 2, + DRM_FORMAT_VYUY => 2, + DRM_FORMAT_XBGR1555 => 2, + DRM_FORMAT_XBGR4444 => 2, + DRM_FORMAT_XRGB1555 => 2, + DRM_FORMAT_XRGB4444 => 2, + DRM_FORMAT_YUYV => 2, + DRM_FORMAT_YVYU => 2, + DRM_FORMAT_BGR888 => 3, + DRM_FORMAT_RGB888 => 3, + DRM_FORMAT_ABGR2101010 => 4, + DRM_FORMAT_ABGR8888 => 4, + DRM_FORMAT_ARGB2101010 => 4, + DRM_FORMAT_ARGB8888 => 4, + DRM_FORMAT_AYUV => 4, + DRM_FORMAT_BGRA1010102 => 4, + DRM_FORMAT_BGRA8888 => 4, + DRM_FORMAT_BGRX1010102 => 4, + DRM_FORMAT_BGRX8888 => 4, + DRM_FORMAT_RGBA1010102 => 4, + DRM_FORMAT_RGBA8888 => 4, + DRM_FORMAT_RGBX1010102 => 4, + DRM_FORMAT_RGBX8888 => 4, + DRM_FORMAT_XBGR2101010 => 4, + DRM_FORMAT_XBGR8888 => 4, + DRM_FORMAT_XRGB2101010 => 4, + DRM_FORMAT_XRGB8888 => 4, + _ => return None, + }; + return Some(bpp); + } } impl From<u32> for Format { @@ -507,6 +581,28 @@ mod tests { } #[test] + fn format_bytes_per_pixel() { + let f = Format::new(b'X', b'R', b'2', b'4'); + assert_eq!(f.bytes_per_pixel(0), Some(4)); + assert_eq!(f.bytes_per_pixel(1), None); + let f = Format::new(b'N', b'V', b'1', b'2'); + assert_eq!(f.bytes_per_pixel(0), Some(1)); + assert_eq!(f.bytes_per_pixel(1), Some(2)); + assert_eq!(f.bytes_per_pixel(2), None); + let f = Format::new(b'R', b'8', b' ', b' '); + assert_eq!(f.bytes_per_pixel(0), Some(1)); + assert_eq!(f.bytes_per_pixel(1), None); + let f = Format::new(b'B', b'G', b'2', b'4'); + assert_eq!(f.bytes_per_pixel(0), Some(3)); + assert_eq!(f.bytes_per_pixel(1), None); + let f = Format::new(b'G', b'R', b'8', b'8'); + assert_eq!(f.bytes_per_pixel(0), Some(2)); + assert_eq!(f.bytes_per_pixel(1), None); + let f = Format::new(b'Z', b'A', b'C', b'H'); + assert_eq!(f.bytes_per_pixel(0), None); + } + + #[test] #[ignore] // no access to /dev/dri fn open_device() { let drm_card = File::open("/dev/dri/card0").expect("failed to open card"); |