On Mon, 7 Mar 2022 21:53:17 +0100
Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> Add fourcc codes for color-indexed frame buffer formats with two, four,
> and sixteen colors. Add support for creating buffers using these
> formats.
>
> Signed-off-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
> ---
> include/drm/drm_fourcc.h | 5 ++++-
> tests/modetest/buffers.c | 15 +++++++++++++++
> tests/util/format.c | 3 +++
> 3 files changed, 22 insertions(+), 1 deletion(-)
>
> diff --git a/include/drm/drm_fourcc.h b/include/drm/drm_fourcc.h
> index 957c7be29239c0a1..f8b18d28a71dabff 100644
> --- a/include/drm/drm_fourcc.h
> +++ b/include/drm/drm_fourcc.h
> @@ -99,7 +99,10 @@ extern "C" {
> #define DRM_FORMAT_INVALID 0
>
> /* color index */
> -#define DRM_FORMAT_C8 fourcc_code('C', '8', ' ', ' ') /* [7:0] C */
> +#define DRM_FORMAT_C1 fourcc_code('C', '1', ' ', ' ') /* [7:0] C0:C1:C2:C3:C4:C5:C6:C7 1:1:1:1:1:1:1:1 eight pixels/byte */
> +#define DRM_FORMAT_C2 fourcc_code('C', '2', ' ', ' ') /* [7:0] C0:C1:C2:C3 2:2:2:2 four pixels/byte */
> +#define DRM_FORMAT_C4 fourcc_code('C', '4', ' ', ' ') /* [7:0] C0:C1 4:4 two pixels/byte */
> +#define DRM_FORMAT_C8 fourcc_code('C', '8', ' ', ' ') /* [7:0] C 8 one pixel/byte */
Hi Geert,
I believe updates to drm_fourcc.h in libdrm must be done with the
specific process, please see
https://gitlab.freedesktop.org/mesa/drm/-/blob/main/include/drm/README
section "When and how to update these files".
Thanks,
pq
>
> /* 8 bpp Red */
> #define DRM_FORMAT_R8 fourcc_code('R', '8', ' ', ' ') /* [7:0] R */
> diff --git a/tests/modetest/buffers.c b/tests/modetest/buffers.c
> index 8a8d9e0143474378..af7f60b4fb4d09ad 100644
> --- a/tests/modetest/buffers.c
> +++ b/tests/modetest/buffers.c
> @@ -135,6 +135,18 @@ bo_create(int fd, unsigned int format,
> int ret;
>
> switch (format) {
> + case DRM_FORMAT_C1:
> + bpp = 1;
> + break;
> +
> + case DRM_FORMAT_C2:
> + bpp = 2;
> + break;
> +
> + case DRM_FORMAT_C4:
> + bpp = 4;
> + break;
> +
> case DRM_FORMAT_C8:
> case DRM_FORMAT_NV12:
> case DRM_FORMAT_NV21:
> @@ -283,6 +295,9 @@ bo_create(int fd, unsigned int format,
> planes[2] = virtual + offsets[2];
> break;
>
> + case DRM_FORMAT_C1:
> + case DRM_FORMAT_C2:
> + case DRM_FORMAT_C4:
> case DRM_FORMAT_C8:
> case DRM_FORMAT_ARGB4444:
> case DRM_FORMAT_XRGB4444:
> diff --git a/tests/util/format.c b/tests/util/format.c
> index 1ca1b82ce947b2f4..4b984af9bce8ac6f 100644
> --- a/tests/util/format.c
> +++ b/tests/util/format.c
> @@ -40,6 +40,9 @@
>
> static const struct util_format_info format_info[] = {
> /* Indexed */
> + { DRM_FORMAT_C1, "C1" },
> + { DRM_FORMAT_C2, "C2" },
> + { DRM_FORMAT_C4, "C4" },
> { DRM_FORMAT_C8, "C8" },
> /* YUV packed */
> { DRM_FORMAT_UYVY, "UYVY", MAKE_YUV_INFO(YUV_YCbCr | YUV_CY, 2, 2, 2) },
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