diff options
Diffstat (limited to 'detile/viv-demultitile.c')
| -rw-r--r-- | detile/viv-demultitile.c | 162 |
1 files changed, 148 insertions, 14 deletions
diff --git a/detile/viv-demultitile.c b/detile/viv-demultitile.c index 1162bef..5968cae 100644 --- a/detile/viv-demultitile.c +++ b/detile/viv-demultitile.c @@ -1,10 +1,62 @@ +#include <errno.h> +#include <getopt.h> #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <sys/fcntl.h> #include <sys/stat.h> #include <sys/mman.h> #include <unistd.h> +static int safe_write(int fd, void *buf, size_t size) +{ + size_t written = 0; + ssize_t ret = 0; + + while (size) { + ret = write(fd, buf, size); + if (ret == -1 && errno == EINTR) { + continue; + } else if (ret > 0) { + written += ret; + buf += ret; + size -= ret; + } else if (written) { + ret = written; + break; + } else { + break; + } + } + + return ret; +} + +static int safe_read(int fd, void *buf, size_t size) +{ + size_t rd = 0; + ssize_t ret = 0; + + while (size) { + ret = read(fd, buf, size); + if (ret == -1 && errno == EINTR) { + continue; + } else if (ret > 0) { + rd += ret; + buf += ret; + size -= ret; + } else if (rd) { + ret = rd; + break; + } else { + break; + } + } + + return ret; +} + + static void detile_gen(void *dst, void *src, unsigned int unit_size, unsigned int tile_width, unsigned int tile_height, unsigned int blocks_x, unsigned int blocks_y) @@ -44,8 +96,9 @@ static void demultitile(void *dst, void *src, unsigned ps, unsigned w, unsigned int x, y; /* - * u1 u2 l1 l2 u5 u6 l5 l6 - * l3 l4 u3 u4 l7 l8 u7 u8 + * 4 8 12 16 20 24 28 32 36 40 44 48 52 56 60 64 + * u1 u2 l1 l2 u5 u6 l5 l6 u9 u10 l9 l10 u13 u14 l13 l14 + * l3 l4 u3 u4 l7 l8 u7 u8 l11 l12 u11 u12 l15 l16 u15 u16 */ tile_bytes = ps * 4 * 4; /* each 4x4 tile */ @@ -54,9 +107,11 @@ static void demultitile(void *dst, void *src, unsigned ps, unsigned w, unsigned src_u = src; src_l = src + tile_stride * tile_h / 2; - fprintf(stderr, "tile bytes = 0x%x\n", tile_bytes); - fprintf(stderr, "tile stride = 0x%x\n", tile_stride); - fprintf(stderr, "u -> l = 0x%x\n", src_l - src_u); + if (0) { + fprintf(stderr, "tile bytes = 0x%x\n", tile_bytes); + fprintf(stderr, "tile stride = 0x%x\n", tile_stride); + fprintf(stderr, "u -> l = 0x%x\n", src_l - src_u); + } for (y = 0; y < tile_h / 2; y++) { void *dpyu = tmp + y * 2 * tile_stride; @@ -89,22 +144,101 @@ int main(int argc, char *argv[]) { struct stat st; void *ptr, *out; + int fd = 0; + int opt, ret, cpp = 4, width = 0, height = -1, multitile = 0; + size_t size; + + while ((opt = getopt(argc, argv, "w:h:m")) != -1) { + switch (opt) { + case 'w': + width = strtoul(optarg, NULL, 10); + break; + case 'h': + height = strtoul(optarg, NULL, 10); + break; + case 'm': + multitile = 1; + break; + default: + fprintf(stderr, "Usage: %s [-w WIDTH] [-h HEIGHT] [FILE]\n", + argv[0]); + return 1; + } + } - if (fstat(0, &st) == -1) { - perror("failed to stat"); - return 1; + if (optind < argc) { + fd = open(argv[optind], O_RDONLY); + if (fd == -1) { + fprintf(stderr, "%s: %s: %m\n", argv[0], argv[optind]); + return 1; + } + } else { + fd = dup(0); } - ptr = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, 0, 0); - if (ptr == (void *)-1) { - perror("failed to mmap"); + if (fstat(fd, &st) == -1) { + fprintf(stderr, "%s: failed to stat: %m\n", argv[0]); + close(fd); return 1; } - out = malloc(st.st_size); + if (height == -1) + height = st.st_size / (width * cpp); + + size = cpp * width * height; + if (st.st_size) { + if (size > st.st_size) { + fprintf(stderr, "%s: width/height exceeds file size\n", + argv[0]); + close(fd); + return 1; + } + + ptr = mmap(NULL, st.st_size, PROT_READ, MAP_SHARED, fd, 0); + if (ptr == (void *)-1) { + fprintf(stderr, "%s: failed to mmap: %m", argv[0]); + close(fd); + return 1; + } + } else { + ptr = malloc(size); + if (!ptr) { + fprintf(stderr, "%s: out of memory\n", argv[0]); + close(fd); + return 1; + } + ret = safe_read(fd, ptr, size); + if (ret < 0) { + fprintf(stderr, "%s: %m\n", argv[0]); + free(ptr); + close(fd); + return 1; + } else if (ret != size) { + fprintf(stderr, "%s: short read\n", argv[0]); + free(ptr); + close(fd); + return 1; + } + } + + out = malloc(size); + + if (multitile) + demultitile(out, ptr, cpp, width, height); + else + detile(out, ptr, cpp, width, height); + + ret = safe_write(1, out, size); - demultitile(out, ptr, 4, 256, 256); + free(out); + + if (ret < 0) { + fprintf(stderr, "%s: write: %m\n", argv[0]); + return 1; + } else if (ret != size) { + fprintf(stderr, "%s: short write\n", argv[0]); + return 1; + } - write(1, out, st.st_size); return 0; } |