1 #ifndef __GRALLOC_CB_H__ 2 #define __GRALLOC_CB_H__ 3 4 #include <hardware/hardware.h> 5 #include <hardware/gralloc.h> 6 #include <cutils/native_handle.h> 7 8 #define BUFFER_HANDLE_MAGIC ((int)0xabfabfab) 9 #define CB_HANDLE_NUM_INTS(nfds) (int)((sizeof(cb_handle_t) - (nfds)*sizeof(int)) / sizeof(int)) 10 11 // 12 // Our buffer handle structure 13 // 14 struct cb_handle_t : public native_handle { 15 cb_handle_tcb_handle_t16 cb_handle_t(int p_fd, int p_ashmemSize, int p_usage, 17 int p_width, int p_height, 18 int p_glFormat, int p_glType) : 19 fd(p_fd), 20 magic(BUFFER_HANDLE_MAGIC), 21 usage(p_usage), 22 width(p_width), 23 height(p_height), 24 glFormat(p_glFormat), 25 glType(p_glType), 26 ashmemSize(p_ashmemSize), 27 ashmemBase(NULL), 28 ashmemBasePid(0), 29 mappedPid(0), 30 lockedLeft(0), 31 lockedTop(0), 32 lockedWidth(0), 33 lockedHeight(0), 34 hostHandle(0) 35 { 36 version = sizeof(native_handle); 37 numFds = 0; 38 numInts = CB_HANDLE_NUM_INTS(numFds); 39 } 40 ~cb_handle_tcb_handle_t41 ~cb_handle_t() { 42 magic = 0; 43 } 44 setFdcb_handle_t45 void setFd(int p_fd) { 46 if (p_fd >= 0) { 47 numFds = 1; 48 } 49 else { 50 numFds = 0; 51 } 52 fd = p_fd; 53 numInts = CB_HANDLE_NUM_INTS(numFds); 54 } 55 validatecb_handle_t56 static bool validate(cb_handle_t * hnd) { 57 return (hnd && 58 hnd->version == sizeof(native_handle) && 59 hnd->magic == BUFFER_HANDLE_MAGIC && 60 hnd->numInts == CB_HANDLE_NUM_INTS(hnd->numFds)); 61 } 62 canBePostedcb_handle_t63 bool canBePosted() { 64 return (0 != (usage & GRALLOC_USAGE_HW_FB)); 65 } 66 67 // file-descriptors 68 int fd; // ashmem fd (-1 of ashmem region did not allocated, i.e. no SW access needed) 69 70 // ints 71 int magic; // magic number in order to validate a pointer to be a cb_handle_t 72 int usage; // usage bits the buffer was created with 73 int width; // buffer width 74 int height; // buffer height 75 int glFormat; // OpenGL format enum used for host h/w color buffer 76 int glType; // OpenGL type enum used when uploading to host 77 int ashmemSize; // ashmem region size for the buffer (0 unless is HW_FB buffer or 78 // s/w access is needed) 79 int ashmemBase; // CPU address of the mapped ashmem region 80 int ashmemBasePid; // process id which mapped the ashmem region 81 int mappedPid; // process id which succeeded gralloc_register call 82 int lockedLeft; // region of buffer locked for s/w write 83 int lockedTop; 84 int lockedWidth; 85 int lockedHeight; 86 uint32_t hostHandle; 87 }; 88 89 90 #endif //__GRALLOC_CB_H__ 91