diff options
Diffstat (limited to 'src/gbm/main')
| -rw-r--r-- | src/gbm/main/gbm.c | 107 | ||||
| -rw-r--r-- | src/gbm/main/gbm.h | 18 | ||||
| -rw-r--r-- | src/gbm/main/gbmint.h | 21 |
3 files changed, 141 insertions, 5 deletions
diff --git a/src/gbm/main/gbm.c b/src/gbm/main/gbm.c index 9459720261f..79ba65051f2 100644 --- a/src/gbm/main/gbm.c +++ b/src/gbm/main/gbm.c @@ -84,8 +84,7 @@ gbm_device_get_backend_name(struct gbm_device *gbm) */ int gbm_device_is_format_supported(struct gbm_device *gbm, - enum gbm_bo_format format, - uint32_t usage) + uint32_t format, uint32_t usage) { return gbm->is_format_supported(gbm, format, usage); } @@ -263,7 +262,7 @@ gbm_bo_destroy(struct gbm_bo *bo) GBM_EXPORT struct gbm_bo * gbm_bo_create(struct gbm_device *gbm, uint32_t width, uint32_t height, - enum gbm_bo_format format, uint32_t usage) + uint32_t format, uint32_t usage) { if (width == 0 || height == 0) return NULL; @@ -305,3 +304,105 @@ gbm_bo_create_from_egl_image(struct gbm_device *gbm, return gbm->bo_create_from_egl_image(gbm, egl_dpy, egl_image, width, height, usage); } + +/** + * Allocate a surface object + * + * \param gbm The gbm device returned from gbm_create_device() + * \param width The width for the surface + * \param height The height for the surface + * \param format The format to use for the surface + * + * \return A newly allocated surface that should be freed with + * gbm_surface_destroy() when no longer needed. If an error occurs + * during allocation %NULL will be returned. + * + * \sa enum gbm_bo_format for the list of formats + */ +GBM_EXPORT struct gbm_surface * +gbm_surface_create(struct gbm_device *gbm, + uint32_t width, uint32_t height, + uint32_t format, uint32_t flags) +{ + return gbm->surface_create(gbm, width, height, format, flags); +} + +/** + * Destroys the given surface and frees all resources associated with + * it. + * + * All buffers locked with gbm_surface_lock_front_buffer() should be + * released prior to calling this function. + * + * \param surf The surface + */ +GBM_EXPORT void +gbm_surface_destroy(struct gbm_surface *surf) +{ + surf->gbm->surface_destroy(surf); +} + +/** + * Lock the surface's current front buffer + * + * Lock rendering to the surface's current front buffer until it is + * released with gbm_surface_release_buffer(). + * + * This function must be called exactly once after calling + * eglSwapBuffers. Calling it before any eglSwapBuffer has happened + * on the surface or two or more times after eglSwapBuffers is an + * error. A new bo representing the new front buffer is returned. On + * multiple invocations, all the returned bos must be released in + * order to release the actual surface buffer. + * + * \param surf The surface + * + * \return A newly allocated buffer object that should be released + * with gbm_surface_release_buffer() when no longer needed. This bo + * should not be destroyed using gbm_bo_destroy(). If an error occurs + * this function returns %NULL. + */ +GBM_EXPORT struct gbm_bo * +gbm_surface_lock_front_buffer(struct gbm_surface *surf) +{ + return surf->gbm->surface_lock_front_buffer(surf); +} + +/** + * Release a locked buffer obtained with gbm_surface_lock_front_buffer() + * + * The bo is destroyed after a call to this function and returns the + * underlying buffer to the gbm surface. Releasing a bo will + * typically make gbm_surface_has_free_buffer() return 1 and thus + * allow rendering the next frame, but not always. + * + * \param surf The surface + * \param bo The buffer object + */ +GBM_EXPORT void +gbm_surface_release_buffer(struct gbm_surface *surf, struct gbm_bo *bo) +{ + surf->gbm->surface_release_buffer(surf, bo); +} + +/** + * Return whether or not a surface has free (non-locked) buffers + * + * Before starting a new frame, the surface must have a buffer + * available for rendering. Initially, a gbm surface will have a free + * buffer, but after one of more buffers have been locked (\sa + * gbm_surface_lock_front_buffer()), the application must check for a + * free buffer before rendering. + * + * If a surface doesn't have a free buffer, the application must + * return a buffer to the surface using gbm_surface_release_buffer() + * and after that, the application can query for free buffers again. + * + * \param surf The surface + * \return 1 if the surface has free buffers, 0 otherwise + */ +GBM_EXPORT int +gbm_surface_has_free_buffers(struct gbm_surface *surf) +{ + return surf->gbm->surface_has_free_buffers(surf); +} diff --git a/src/gbm/main/gbm.h b/src/gbm/main/gbm.h index ecebf11f7b9..6748752d8f1 100644 --- a/src/gbm/main/gbm.h +++ b/src/gbm/main/gbm.h @@ -44,6 +44,7 @@ extern "C" { struct gbm_device; struct gbm_bo; +struct gbm_surface; /** * \mainpage The Generic Buffer Manager @@ -247,6 +248,23 @@ gbm_bo_get_handle(struct gbm_bo *bo); void gbm_bo_destroy(struct gbm_bo *bo); +struct gbm_surface * +gbm_surface_create(struct gbm_device *gbm, + uint32_t width, uint32_t height, + uint32_t format, uint32_t flags); + +struct gbm_bo * +gbm_surface_lock_front_buffer(struct gbm_surface *surface); + +void +gbm_surface_release_buffer(struct gbm_surface *surface, struct gbm_bo *bo); + +int +gbm_surface_has_free_buffers(struct gbm_surface *surface); + +void +gbm_surface_destroy(struct gbm_surface *surface); + #ifdef __cplusplus } #endif diff --git a/src/gbm/main/gbmint.h b/src/gbm/main/gbmint.h index 66c4c41cf8e..53d73f40df6 100644 --- a/src/gbm/main/gbmint.h +++ b/src/gbm/main/gbmint.h @@ -59,18 +59,27 @@ struct gbm_device { void (*destroy)(struct gbm_device *gbm); int (*is_format_supported)(struct gbm_device *gbm, - enum gbm_bo_format format, + uint32_t format, uint32_t usage); struct gbm_bo *(*bo_create)(struct gbm_device *gbm, uint32_t width, uint32_t height, - enum gbm_bo_format format, + uint32_t format, uint32_t usage); struct gbm_bo *(*bo_create_from_egl_image)(struct gbm_device *gbm, void *egl_dpy, void *egl_img, uint32_t width, uint32_t height, uint32_t usage); void (*bo_destroy)(struct gbm_bo *bo); + + struct gbm_surface *(*surface_create)(struct gbm_device *gbm, + uint32_t width, uint32_t height, + uint32_t format, uint32_t flags); + struct gbm_bo *(*surface_lock_front_buffer)(struct gbm_surface *surface); + void (*surface_release_buffer)(struct gbm_surface *surface, + struct gbm_bo *bo); + int (*surface_has_free_buffers)(struct gbm_surface *surface); + void (*surface_destroy)(struct gbm_surface *surface); }; /** @@ -87,6 +96,14 @@ struct gbm_bo { union gbm_bo_handle handle; }; +struct gbm_surface { + struct gbm_device *gbm; + uint32_t width; + uint32_t height; + uint32_t format; + uint32_t flags; +}; + struct gbm_backend { const char *backend_name; struct gbm_device *(*create_device)(int fd); |