* Benjamin Franzke <benjaminfranzke@googlemail.com>
*/
-#define _BSD_SOURCE
-
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdint.h>
-#include <sys/types.h>
+#ifdef MAJOR_IN_MKDEV
+#include <sys/mkdev.h>
+#endif
+#ifdef MAJOR_IN_SYSMACROS
+#include <sys/sysmacros.h>
+#endif
#include <sys/stat.h>
#include <unistd.h>
+#include <errno.h>
#include "gbm.h"
#include "gbmint.h"
-#include "common.h"
#include "backend.h"
-#define ARRAY_SIZE(a) (sizeof(a)/sizeof((a)[0]))
-
-struct gbm_device *devices[16];
-
-static int device_num = 0;
-
/** Returns the file description for the gbm device
*
* \return The fd that the struct gbm_device was created with
return gbm->fd;
}
-/* FIXME: maybe superfluous, use udev subclass from the fd? */
/** Get the backend name for the given gbm device
*
* \return The backend name string - this belongs to the device and must not
*
* \sa enum gbm_bo_format for the list of formats
*/
-int
+GBM_EXPORT 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);
}
gbm->destroy(gbm);
}
-GBM_EXPORT struct gbm_device *
-_gbm_mesa_get_device(int fd)
-{
- struct gbm_device *gbm = NULL;
- struct stat buf;
- dev_t dev;
- int i;
-
- if (fd < 0 || fstat(fd, &buf) < 0 || !S_ISCHR(buf.st_mode)) {
- fprintf(stderr, "_gbm_mesa_get_device: invalid fd: %d\n", fd);
- return NULL;
- }
-
- for (i = 0; i < device_num; ++i) {
- dev = devices[i]->stat.st_rdev;
- if (major(dev) == major(buf.st_rdev) &&
- minor(dev) == minor(buf.st_rdev)) {
- gbm = devices[i];
- gbm->refcount++;
- break;
- }
- }
-
- return gbm;
-}
-
/** Create a gbm device for allocating buffers
*
* The file descriptor passed in is used by the backend to communicate with
* the file descriptor returned when opening a device such as \c
* /dev/dri/card0
*
- * \param fd The file descriptor for an backend specific device
+ * \param fd The file descriptor for a backend specific device
* \return The newly created struct gbm_device. The resources associated with
* the device should be freed with gbm_device_destroy() when it is no longer
* needed. If the creation of the device failed NULL will be returned.
struct stat buf;
if (fd < 0 || fstat(fd, &buf) < 0 || !S_ISCHR(buf.st_mode)) {
- fprintf(stderr, "gbm_create_device: invalid fd: %d\n", fd);
+ errno = EINVAL;
return NULL;
}
- if (device_num == 0)
- memset(devices, 0, sizeof devices);
-
gbm = _gbm_create_device(fd);
if (gbm == NULL)
return NULL;
gbm->stat = buf;
gbm->refcount = 1;
- if (device_num < ARRAY_SIZE(devices)-1)
- devices[device_num++] = gbm;
-
return gbm;
}
* \return The width of the allocated buffer object
*
*/
-GBM_EXPORT unsigned int
+GBM_EXPORT uint32_t
gbm_bo_get_width(struct gbm_bo *bo)
{
return bo->width;
* \param bo The buffer object
* \return The height of the allocated buffer object
*/
-GBM_EXPORT unsigned int
+GBM_EXPORT uint32_t
gbm_bo_get_height(struct gbm_bo *bo)
{
return bo->height;
* gbm_bo_create()
*
* \param bo The buffer object
- * \return The stride of the allocated buffer object
+ * \return The stride of the allocated buffer object in bytes
+ */
+GBM_EXPORT uint32_t
+gbm_bo_get_stride(struct gbm_bo *bo)
+{
+ return gbm_bo_get_stride_for_plane(bo, 0);
+}
+
+/** Get the stride for the given plane
+ *
+ * \param bo The buffer object
+ * \param plane for which you want the stride
+ *
+ * \sa gbm_bo_get_stride()
*/
GBM_EXPORT uint32_t
-gbm_bo_get_pitch(struct gbm_bo *bo)
+gbm_bo_get_stride_for_plane(struct gbm_bo *bo, int plane)
+{
+ return bo->gbm->bo_get_stride(bo, plane);
+}
+
+/** Get the format of the buffer object
+ *
+ * The format of the pixels in the buffer.
+ *
+ * \param bo The buffer object
+ * \return The format of buffer object, one of the GBM_FORMAT_* codes
+ */
+GBM_EXPORT uint32_t
+gbm_bo_get_format(struct gbm_bo *bo)
+{
+ return bo->format;
+}
+
+/** Get the offset for the data of the specified plane
+ *
+ * Extra planes, and even the first plane, may have an offset from the start of
+ * the buffer object. This function will provide the offset for the given plane
+ * to be used in various KMS APIs.
+ *
+ * \param bo The buffer object
+ * \return The offset
+ */
+GBM_EXPORT uint32_t
+gbm_bo_get_offset(struct gbm_bo *bo, int plane)
+{
+ return bo->gbm->bo_get_offset(bo, plane);
+}
+
+/** Get the gbm device used to create the buffer object
+ *
+ * \param bo The buffer object
+ * \return Returns the gbm device with which the buffer object was created
+ */
+GBM_EXPORT struct gbm_device *
+gbm_bo_get_device(struct gbm_bo *bo)
{
- return bo->pitch;
+ return bo->gbm;
}
/** Get the handle of the buffer object
* the format of this handle is platform specific.
*
* \param bo The buffer object
- * \return Returns the stride of the allocated buffer object
+ * \return Returns the handle of the allocated buffer object
*/
GBM_EXPORT union gbm_bo_handle
gbm_bo_get_handle(struct gbm_bo *bo)
return bo->handle;
}
+/** Get a DMA-BUF file descriptor for the buffer object
+ *
+ * This function creates a DMA-BUF (also known as PRIME) file descriptor
+ * handle for the buffer object. Each call to gbm_bo_get_fd() returns a new
+ * file descriptor and the caller is responsible for closing the file
+ * descriptor.
+
+ * \param bo The buffer object
+ * \return Returns a file descriptor referring to the underlying buffer or -1
+ * if an error occurs.
+ */
+GBM_EXPORT int
+gbm_bo_get_fd(struct gbm_bo *bo)
+{
+ return bo->gbm->bo_get_fd(bo);
+}
+
+/** Get the number of planes for the given bo.
+ *
+ * \param bo The buffer object
+ * \return The number of planes
+ */
+GBM_EXPORT int
+gbm_bo_get_plane_count(struct gbm_bo *bo)
+{
+ return bo->gbm->bo_get_planes(bo);
+}
+
+/** Get the handle for the specified plane of the buffer object
+ *
+ * This function gets the handle for any plane associated with the BO. When
+ * dealing with multi-planar formats, or formats which might have implicit
+ * planes based on different underlying hardware it is necessary for the client
+ * to be able to get this information to pass to the DRM.
+ *
+ * \param bo The buffer object
+ * \param plane the plane to get a handle for
+ *
+ * \sa gbm_bo_get_handle()
+ */
+GBM_EXPORT union gbm_bo_handle
+gbm_bo_get_handle_for_plane(struct gbm_bo *bo, int plane)
+{
+ return bo->gbm->bo_get_handle(bo, plane);
+}
+
+/**
+ * Get the chosen modifier for the buffer object
+ *
+ * This function returns the modifier that was chosen for the object. These
+ * properties may be generic, or platform/implementation dependent.
+ *
+ * \param bo The buffer object
+ * \return Returns the selected modifier (chosen by the implementation) for the
+ * BO.
+ * \sa gbm_bo_create_with_modifiers() where possible modifiers are set
+ * \sa gbm_surface_create_with_modifiers() where possible modifiers are set
+ * \sa define DRM_FORMAT_MOD_* in drm_fourcc.h for possible modifiers
+ */
+GBM_EXPORT uint64_t
+gbm_bo_get_modifier(struct gbm_bo *bo)
+{
+ return bo->gbm->bo_get_modifier(bo);
+}
+
+/** Write data into the buffer object
+ *
+ * If the buffer object was created with the GBM_BO_USE_WRITE flag,
+ * this function can be used to write data into the buffer object. The
+ * data is copied directly into the object and it's the responsibility
+ * of the caller to make sure the data represents valid pixel data,
+ * according to the width, height, stride and format of the buffer object.
+ *
+ * \param bo The buffer object
+ * \param buf The data to write
+ * \param count The number of bytes to write
+ * \return Returns 0 on success, otherwise -1 is returned an errno set
+ */
+GBM_EXPORT int
+gbm_bo_write(struct gbm_bo *bo, const void *buf, size_t count)
+{
+ return bo->gbm->bo_write(bo, buf, count);
+}
+
+/** Set the user data associated with a buffer object
+ *
+ * \param bo The buffer object
+ * \param data The data to associate to the buffer object
+ * \param destroy_user_data A callback (which may be %NULL) that will be
+ * called prior to the buffer destruction
+ */
+GBM_EXPORT void
+gbm_bo_set_user_data(struct gbm_bo *bo, void *data,
+ void (*destroy_user_data)(struct gbm_bo *, void *))
+{
+ bo->user_data = data;
+ bo->destroy_user_data = destroy_user_data;
+}
+
+/** Get the user data associated with a buffer object
+ *
+ * \param bo The buffer object
+ * \return Returns the user data associated with the buffer object or %NULL
+ * if no data was associated with it
+ *
+ * \sa gbm_bo_set_user_data()
+ */
+GBM_EXPORT void *
+gbm_bo_get_user_data(struct gbm_bo *bo)
+{
+ return bo->user_data;
+}
+
/**
* Destroys the given buffer object and frees all resources associated with
* it.
GBM_EXPORT void
gbm_bo_destroy(struct gbm_bo *bo)
{
+ if (bo->destroy_user_data)
+ bo->destroy_user_data(bo, bo->user_data);
+
bo->gbm->bo_destroy(bo);
}
*
* \return A newly allocated buffer that should be freed with gbm_bo_destroy()
* when no longer needed. If an error occurs during allocation %NULL will be
- * returned.
+ * returned and errno set.
*
* \sa enum gbm_bo_format for the list of formats
* \sa enum gbm_bo_flags for the list of usage flags
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)
+ if (width == 0 || height == 0) {
+ errno = EINVAL;
return NULL;
+ }
- if (usage & GBM_BO_USE_CURSOR_64X64 &&
- (width != 64 || height != 64))
+ return gbm->bo_create(gbm, width, height, format, usage, NULL, 0);
+}
+
+GBM_EXPORT struct gbm_bo *
+gbm_bo_create_with_modifiers(struct gbm_device *gbm,
+ uint32_t width, uint32_t height,
+ uint32_t format,
+ const uint64_t *modifiers,
+ const unsigned int count)
+{
+ if (width == 0 || height == 0) {
+ errno = EINVAL;
return NULL;
+ }
- return gbm->bo_create(gbm, width, height, format, usage);
-}
+ if ((count && !modifiers) || (modifiers && !count)) {
+ errno = EINVAL;
+ return NULL;
+ }
+ return gbm->bo_create(gbm, width, height, format, 0, modifiers, count);
+}
/**
- * Create a buffer object representing the contents of an EGLImage
+ * Create a gbm buffer object from an foreign object
+ *
+ * This function imports a foreign object and creates a new gbm bo for it.
+ * This enabled using the foreign object with a display API such as KMS.
+ * Currently three types of foreign objects are supported, indicated by the type
+ * argument:
+ *
+ * GBM_BO_IMPORT_WL_BUFFER
+ * GBM_BO_IMPORT_EGL_IMAGE
+ * GBM_BO_IMPORT_FD
+ *
+ * The gbm bo shares the underlying pixels but its life-time is
+ * independent of the foreign object.
*
* \param gbm The gbm device returned from gbm_create_device()
- * \param egl_dpy The EGLDisplay on which the EGLImage was created
- * \param egl_image The EGLImage to create the buffer from
- * \param width The width to use in the creation of the buffer object
- * \param height The height to use in the creation of the buffer object
+ * \param type The type of object we're importing
+ * \param buffer Pointer to the external object
* \param usage The union of the usage flags for this buffer
*
* \return A newly allocated buffer object that should be freed with
- * gbm_bo_destroy() when no longer needed.
+ * gbm_bo_destroy() when no longer needed. On error, %NULL is returned
+ * and errno is set.
*
* \sa enum gbm_bo_flags for the list of usage flags
- *
- * \note The expectation is that this function will use an efficient method
- * for making the contents of the EGLImage available as a buffer object.
*/
GBM_EXPORT struct gbm_bo *
-gbm_bo_create_from_egl_image(struct gbm_device *gbm,
- void *egl_dpy, void *egl_image,
- uint32_t width, uint32_t height,
- uint32_t usage)
+gbm_bo_import(struct gbm_device *gbm,
+ uint32_t type, void *buffer, uint32_t usage)
{
- if (width == 0 || height == 0)
+ return gbm->bo_import(gbm, type, buffer, usage);
+}
+
+/**
+ * Map a region of a gbm buffer object for cpu access
+ *
+ * This function maps a region of a gbm bo for cpu read and/or write
+ * access.
+ *
+ * \param bo The buffer object
+ * \param x The X (top left origin) starting position of the mapped region for
+ * the buffer
+ * \param y The Y (top left origin) starting position of the mapped region for
+ * the buffer
+ * \param width The width of the mapped region for the buffer
+ * \param height The height of the mapped region for the buffer
+ * \param flags The union of the GBM_BO_TRANSFER_* flags for this buffer
+ * \param stride Ptr for returned stride in bytes of the mapped region
+ * \param map_data Returned opaque ptr for the mapped region
+ *
+ * \return Address of the mapped buffer that should be unmapped with
+ * gbm_bo_unmap() when no longer needed. On error, %NULL is returned
+ * and errno is set.
+ *
+ * \sa enum gbm_bo_transfer_flags for the list of flags
+ */
+GBM_EXPORT void *
+gbm_bo_map(struct gbm_bo *bo,
+ uint32_t x, uint32_t y,
+ uint32_t width, uint32_t height,
+ uint32_t flags, uint32_t *stride, void **map_data)
+{
+ if (!bo || width == 0 || height == 0 || !stride || !map_data) {
+ errno = EINVAL;
return NULL;
+ }
- return gbm->bo_create_from_egl_image(gbm, egl_dpy, egl_image,
- width, height, usage);
+ return bo->gbm->bo_map(bo, x, y, width, height,
+ flags, stride, map_data);
+}
+
+/**
+ * Unmap a previously mapped region of a gbm buffer object
+ *
+ * This function unmaps a region of a gbm bo for cpu read and/or write
+ * access.
+ *
+ * \param bo The buffer object
+ * \param map_data opaque ptr returned from prior gbm_bo_map
+ */
+GBM_EXPORT void
+gbm_bo_unmap(struct gbm_bo *bo, void *map_data)
+{
+ bo->gbm->bo_unmap(bo, map_data);
+}
+
+/**
+ * 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, NULL, 0);
+}
+
+GBM_EXPORT struct gbm_surface *
+gbm_surface_create_with_modifiers(struct gbm_device *gbm,
+ uint32_t width, uint32_t height,
+ uint32_t format,
+ const uint64_t *modifiers,
+ const unsigned int count)
+{
+ if ((count && !modifiers) || (modifiers && !count)) {
+ errno = EINVAL;
+ return NULL;
+ }
+
+ return gbm->surface_create(gbm, width, height, format, 0,
+ modifiers, count);
+}
+
+/**
+ * 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 buffer object that should be released with
+ * gbm_surface_release_buffer() when no longer needed. The implementation
+ * is free to reuse buffers released with gbm_surface_release_buffer() so
+ * 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()
+ *
+ * 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. The implementation
+ * may choose to destroy the bo immediately or reuse it, in which case
+ * the user data associated with it is unchanged.
+ *
+ * \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 or 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);
}
projects / mesa.git / blobdiff