diff options
author | zhou_xin <zhou_xin@dl.cn.nexty-ele.com> | 2019-03-15 09:55:47 +0800 |
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committer | zhou_xin <zhou_xin@dl.cn.nexty-ele.com> | 2019-03-15 09:55:47 +0800 |
commit | 05e2633e175e98f5b510777f9402b70f3d4ba751 (patch) | |
tree | 434f220102a56b1a9a672507c0e9d5a2568294f6 /tsutils/tsutils.c | |
parent | 1e69db0b5eb9cfa6781e2c046d05dcca3a5bd909 (diff) |
Commit original sourcesandbox/wanglu/settings-log-utils
Diffstat (limited to 'tsutils/tsutils.c')
-rw-r--r-- | tsutils/tsutils.c | 80 |
1 files changed, 80 insertions, 0 deletions
diff --git a/tsutils/tsutils.c b/tsutils/tsutils.c new file mode 100644 index 0000000..8a6d400 --- /dev/null +++ b/tsutils/tsutils.c @@ -0,0 +1,80 @@ +#include <dirent.h> +#include <linux/input.h> +#include <unistd.h> +#include <fcntl.h> +#include <stdio.h> +#include <string.h> + +#define LONG_BITS (sizeof(long) << 3) +#define NUM_LONGS(bits) (((bits) + LONG_BITS - 1) / LONG_BITS) +#define DEV_INPUT "/dev/input" + +char tsInfo[200]; + +static inline int testBit(long bit, const long *array) { + return (array[bit / LONG_BITS] >> bit % LONG_BITS) & 1; +} + +char* getTouchScreenInfo() { + DIR* dir; + struct dirent* itemPtr; + int fd; + int isSingleTouch = 0, hasTouchScreen = 0; + long absbits[NUM_LONGS(ABS_CNT)]; + char tsDevNode[100]; + struct input_absinfo absInfo; + + int maxX, maxY; + + memset(tsDevNode, 0, sizeof(tsDevNode)); + memset(tsInfo, 0, sizeof(tsInfo)); + + if ((dir = opendir(DEV_INPUT)) == NULL) { + printf("open %s failed.\n", DEV_INPUT); + return NULL; + } + + while ((itemPtr = readdir(dir)) != NULL) { + //printf("name : %s---type : %d\n", itemPtr->d_name, itemPtr->d_type); + if ((strstr(itemPtr->d_name, "event") != NULL) && (2 == itemPtr->d_type)) { + sprintf(tsDevNode, "%s/%s", DEV_INPUT, itemPtr->d_name); + fd = open(tsDevNode, O_RDONLY); + if (fd < 0) { + printf("open %s failed.\n", tsDevNode); + return NULL; + } + + if (ioctl(fd, EVIOCGBIT(EV_ABS, sizeof(absbits)), absbits) >= 0) { + isSingleTouch = !testBit(ABS_MT_POSITION_X, absbits); + } else { + close(fd); + continue; + } + + if (ioctl(fd, EVIOCGABS((isSingleTouch ? ABS_X : ABS_MT_POSITION_X)), &absInfo) >= 0) { + maxX = absInfo.maximum; + } else { + close(fd); + continue; + } + + if (ioctl(fd, EVIOCGABS((isSingleTouch ? ABS_Y : ABS_MT_POSITION_Y)), &absInfo) >= 0) { + maxY = absInfo.maximum; + } else { + close(fd); + continue; + } + + hasTouchScreen = 1; + break; + } + } + + if (!hasTouchScreen) return NULL; + + sprintf(tsInfo, "%s %d %d", tsDevNode, maxX, maxY); + + close(fd); + closedir(dir); + return tsInfo; +}
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