diff options
Diffstat (limited to 'gbm.c')
| -rw-r--r-- | gbm.c | 14 |
1 files changed, 12 insertions, 2 deletions
@@ -10,6 +10,7 @@ #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <sys/mman.h> #include <xf86drm.h> #include "drv.h" @@ -225,15 +226,24 @@ PUBLIC struct gbm_bo *gbm_bo_import(struct gbm_device *gbm, uint32_t type, void PUBLIC void *gbm_bo_map(struct gbm_bo *bo, uint32_t x, uint32_t y, uint32_t width, uint32_t height, uint32_t transfer_flags, uint32_t *stride, void **map_data, size_t plane) { + void *addr; + off_t offset; uint32_t map_flags; + struct rectangle rect = { .x = x, .y = y, .width = width, .height = height }; if (!bo || width == 0 || height == 0 || !stride || !map_data) return NULL; *stride = gbm_bo_get_plane_stride(bo, plane); map_flags = (transfer_flags & GBM_BO_TRANSFER_READ) ? BO_MAP_READ : BO_MAP_NONE; map_flags |= (transfer_flags & GBM_BO_TRANSFER_WRITE) ? BO_MAP_WRITE : BO_MAP_NONE; - return drv_bo_map(bo->bo, x, y, width, height, map_flags, (struct mapping **)map_data, - plane); + + addr = drv_bo_map(bo->bo, &rect, map_flags, (struct mapping **)map_data, plane); + if (addr == MAP_FAILED) + return MAP_FAILED; + + offset = gbm_bo_get_plane_stride(bo, plane) * rect.y; + offset += drv_stride_from_format(bo->gbm_format, rect.x, plane); + return (void *)((uint8_t *)addr + offset); } PUBLIC void gbm_bo_unmap(struct gbm_bo *bo, void *map_data) |