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      1 /*
      2  * Copyright (C) 2010-2011 Chia-I Wu <olvaffe (at) gmail.com>
      3  * Copyright (C) 2010-2011 LunarG Inc.
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a
      6  * copy of this software and associated documentation files (the "Software"),
      7  * to deal in the Software without restriction, including without limitation
      8  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
      9  * and/or sell copies of the Software, and to permit persons to whom the
     10  * Software is furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice shall be included
     13  * in all copies or substantial portions of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
     20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     21  * DEALINGS IN THE SOFTWARE.
     22  */
     23 
     24 #ifndef _GRALLOC_DRM_H_
     25 #define _GRALLOC_DRM_H_
     26 
     27 #include <hardware/gralloc.h>
     28 #include <system/graphics.h>
     29 
     30 #ifdef __cplusplus
     31 extern "C" {
     32 #endif
     33 
     34 #define ALIGN(val, align) (((val) + (align) - 1) & ~((align) - 1))
     35 
     36 struct gralloc_drm_t;
     37 struct gralloc_drm_bo_t;
     38 
     39 enum {
     40 	GRALLOC_MODULE_PERFORM_GET_DRM_FD                = 0x80000002,
     41 };
     42 
     43 struct gralloc_drm_t *gralloc_drm_create(void);
     44 void gralloc_drm_destroy(struct gralloc_drm_t *drm);
     45 
     46 int gralloc_drm_get_fd(struct gralloc_drm_t *drm);
     47 
     48 static inline int gralloc_drm_get_bpp(int format)
     49 {
     50 	int bpp;
     51 
     52 	switch (format) {
     53 	case HAL_PIXEL_FORMAT_RGBA_8888:
     54 	case HAL_PIXEL_FORMAT_RGBX_8888:
     55 	case HAL_PIXEL_FORMAT_BGRA_8888:
     56 		bpp = 4;
     57 		break;
     58 	case HAL_PIXEL_FORMAT_RGB_888:
     59 		bpp = 3;
     60 		break;
     61 	case HAL_PIXEL_FORMAT_RGB_565:
     62 	case HAL_PIXEL_FORMAT_YCbCr_422_I:
     63 		bpp = 2;
     64 		break;
     65 	/* planar; only Y is considered */
     66 	case HAL_PIXEL_FORMAT_YV12:
     67 	case HAL_PIXEL_FORMAT_YCbCr_422_SP:
     68 	case HAL_PIXEL_FORMAT_YCrCb_420_SP:
     69 		bpp = 1;
     70 		break;
     71 	default:
     72 		bpp = 0;
     73 		break;
     74 	}
     75 
     76 	return bpp;
     77 }
     78 
     79 static inline void gralloc_drm_align_geometry(int format, int *width, int *height)
     80 {
     81 	int align_w = 1, align_h = 1, extra_height_div = 0;
     82 
     83 	switch (format) {
     84 	case HAL_PIXEL_FORMAT_YV12:
     85 		align_w = 32;
     86 		align_h = 2;
     87 		extra_height_div = 2;
     88 		break;
     89 	case HAL_PIXEL_FORMAT_YCbCr_422_SP:
     90 		align_w = 2;
     91 		extra_height_div = 1;
     92 		break;
     93 	case HAL_PIXEL_FORMAT_YCrCb_420_SP:
     94 		align_w = 2;
     95 		align_h = 2;
     96 		extra_height_div = 2;
     97 		break;
     98 	case HAL_PIXEL_FORMAT_YCbCr_422_I:
     99 		align_w = 2;
    100 		break;
    101 	}
    102 
    103 	*width = ALIGN(*width, align_w);
    104 	*height = ALIGN(*height, align_h);
    105 
    106 	if (extra_height_div)
    107 		*height += *height / extra_height_div;
    108 }
    109 
    110 int gralloc_drm_handle_register(buffer_handle_t handle, struct gralloc_drm_t *drm);
    111 int gralloc_drm_handle_unregister(buffer_handle_t handle);
    112 
    113 struct gralloc_drm_bo_t *gralloc_drm_bo_create(struct gralloc_drm_t *drm, int width, int height, int format, int usage);
    114 void gralloc_drm_bo_decref(struct gralloc_drm_bo_t *bo);
    115 
    116 struct gralloc_drm_bo_t *gralloc_drm_bo_from_handle(buffer_handle_t handle);
    117 buffer_handle_t gralloc_drm_bo_get_handle(struct gralloc_drm_bo_t *bo, int *stride);
    118 int gralloc_drm_get_gem_handle(buffer_handle_t handle);
    119 void gralloc_drm_resolve_format(buffer_handle_t _handle, uint32_t *pitches, uint32_t *offsets, uint32_t *handles);
    120 unsigned int planes_for_format(struct gralloc_drm_t *drm, int hal_format);
    121 
    122 int gralloc_drm_bo_lock(struct gralloc_drm_bo_t *bo, int x, int y, int w, int h, int enable_write, void **addr);
    123 void gralloc_drm_bo_unlock(struct gralloc_drm_bo_t *bo);
    124 
    125 #ifdef __cplusplus
    126 }
    127 #endif
    128 #endif /* _GRALLOC_DRM_H_ */
    129