diff options
Diffstat (limited to 'src/common/backend.h')
| -rw-r--r-- | src/common/backend.h | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/src/common/backend.h b/src/common/backend.h index 96ce9e7..13ce9b5 100644 --- a/src/common/backend.h +++ b/src/common/backend.h @@ -7,6 +7,8 @@ #include "common/input.h" #include "common/timing.h" +#include <string.h> + struct yasl_backend_ops; struct yasl_display { @@ -43,6 +45,17 @@ void yasl_surface_clear_timers(struct yasl_surface *s); struct yasl_surface *yasl_create_toplevel(struct yasl_display *d, const struct yasl_window_spec *spec, void *graphics_device); +/* Report a presented CPU frame's extent, and copy it when out can hold it. */ +static inline bool yasl_copy_frame(const uint32_t *pixels, struct yasl_vector2i extent, + uint32_t *out, size_t cap, struct yasl_vector2i *size) +{ + *size = extent; + size_t count = (size_t)extent.x * (size_t)extent.y; + if (!count || count > cap) return false; + memcpy(out, pixels, count * sizeof(*pixels)); + return true; +} + static inline uint64_t yasl_frame_begin(struct yasl_surface *s) { if (++s->frame_generation == 0) ++s->frame_generation; @@ -95,6 +108,9 @@ struct yasl_backend_ops { bool (*surface_place_under_pointer)(struct yasl_surface *s, struct yasl_vector2i at); /* Optional; NULL means the bell is unsupported. */ bool (*surface_bell)(struct yasl_surface *s); + /* Optional; NULL means no readback. Fills size only for an available frame. */ + bool (*surface_read_pixels)(struct yasl_surface *s, uint32_t *out, size_t cap, + struct yasl_vector2i *size); void *(*display_get_native_handle)(struct yasl_display *d); void *(*surface_get_native_handle)(struct yasl_surface *s); bool (*surface_get_native_frame)(struct yasl_surface *s, |