diff options
Diffstat (limited to 'render/pixel_format.c')
| -rw-r--r-- | render/pixel_format.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/render/pixel_format.c b/render/pixel_format.c index 586d2a09..330a59cc 100644 --- a/render/pixel_format.c +++ b/render/pixel_format.c @@ -1,4 +1,6 @@ +#include <assert.h> #include <drm_fourcc.h> +#include <wlr/util/log.h> #include "render/pixel_format.h" static const struct wlr_pixel_format_info pixel_format_info[] = { @@ -176,3 +178,20 @@ enum wl_shm_format convert_drm_format_to_wl_shm(uint32_t fmt) { return (enum wl_shm_format)fmt; } } + +bool pixel_format_info_check_stride(const struct wlr_pixel_format_info *fmt, + int32_t stride, int32_t width) { + assert(fmt->bpp > 0 && fmt->bpp % 8 == 0); + int32_t bytes_per_pixel = (int32_t)(fmt->bpp / 8); + if (stride % bytes_per_pixel != 0) { + wlr_log(WLR_DEBUG, "Invalid stride %d (incompatible with %d " + "bytes-per-pixel)", stride, bytes_per_pixel); + return false; + } + if (stride / bytes_per_pixel < width) { + wlr_log(WLR_DEBUG, "Invalid stride %d (too small for %d " + "bytes-per-pixel and width %d)", stride, bytes_per_pixel, width); + return false; + } + return true; +} |