diff options
Diffstat (limited to '')
| -rw-r--r-- | bin/gfxx.c | 242 |
1 files changed, 125 insertions, 117 deletions
diff --git a/bin/gfxx.c b/bin/gfxx.c index 92087d18..d451d22c 100644 --- a/bin/gfxx.c +++ b/bin/gfxx.c @@ -15,11 +15,13 @@ */ #include <err.h> +#include <fcntl.h> #include <stdbool.h> #include <stdint.h> #include <stdio.h> #include <stdlib.h> #include <string.h> +#include <sys/mman.h> #include <sys/stat.h> #include <sysexits.h> #include <unistd.h> @@ -27,21 +29,22 @@ #define RGB(r,g,b) ((uint32_t)(r) << 16 | (uint32_t)(g) << 8 | (uint32_t)(b)) #define GRAY(n) RGB(n, n, n) #define MASK(b) ((1 << b) - 1) -#define SCALE(b,n) (uint8_t)(255 * (uint32_t)(n) / MASK(b)) +#define SCALE(b,n) ((b) ? (uint8_t)(255 * (uint32_t)(n) / MASK(b)) : 0) static enum { - COLOR_GRAYSCALE, COLOR_PALETTE, + COLOR_GRAYSCALE, COLOR_RGB, COLOR__MAX, -} space; -static uint8_t bits = 1; -static bool endian; -static uint32_t palette[256] = { -#define X(...) __VA_ARGS__, __VA_ARGS__ - X(X(X(X(X(X(X(0x000000, 0xFFFFFF))))))) -#undef X -}; +} space = COLOR_RGB; +static uint32_t palette[256]; +static enum { + ENDIAN_LITTLE, + ENDIAN_BIG, +} byteOrder, bitOrder; +static uint8_t bits[4] = { 8, 8, 8, 8 }; +#define BITS_COLOR (bits[1] + bits[2] + bits[3]) +#define BITS_TOTAL (bits[0] + BITS_COLOR) static size_t offset; static size_t width = 16; @@ -49,73 +52,80 @@ static bool flip; static bool mirror; static size_t scale = 1; -static size_t size = 1024 * 1024; // max from pipe. +static size_t size; static uint8_t *data; extern int init(int argc, char *argv[]) { const char *path = NULL; - const char *palPath = NULL; int opt; - while (0 < (opt = getopt(argc, argv, "c:p:b:ern:fmw:z:"))) { + while (0 < (opt = getopt(argc, argv, "c:b:e:E:n:w:fmz:"))) { switch (opt) { case 'c': switch (optarg[0]) { - case 'g': space = COLOR_GRAYSCALE; break; case 'p': space = COLOR_PALETTE; break; + case 'g': space = COLOR_GRAYSCALE; break; case 'r': space = COLOR_RGB; break; default: return EX_USAGE; } break; - case 'p': palPath = optarg; break; - case 'b': bits = strtoul(optarg, NULL, 0); break; - case 'e': endian ^= true; break; - case 'n': offset = strtoul(optarg, NULL, 0); break; - case 'w': width = strtoul(optarg, NULL, 0); break; - case 'f': flip ^= true; break; - case 'm': mirror ^= true; break; - case 'z': scale = strtoul(optarg, NULL, 0); break; + case 'e': switch (optarg[0]) { + case 'l': byteOrder = ENDIAN_LITTLE; break; + case 'b': byteOrder = ENDIAN_BIG; break; + default: return EX_USAGE; + } break; + case 'E': switch (optarg[0]) { + case 'l': bitOrder = ENDIAN_LITTLE; break; + case 'b': bitOrder = ENDIAN_BIG; break; + default: return EX_USAGE; + } break; + case 'b': { + size_t len = strlen(optarg); + if (len < 3 || len > 4) return EX_USAGE; + bits[0] = (len > 3) ? optarg[0] - '0' : 0; + bits[1] = optarg[len-3] - '0'; + bits[2] = optarg[len-2] - '0'; + bits[3] = optarg[len-1] - '0'; + } break; + case 'n': offset = strtoul(optarg, NULL, 0); break; + case 'w': width = strtoul(optarg, NULL, 0); break; + case 'f': flip ^= true; break; + case 'm': mirror ^= true; break; + case 'z': scale = strtoul(optarg, NULL, 0); break; default: return EX_USAGE; } } if (argc > optind) path = argv[optind]; - if (!bits || !width || !scale) return EX_USAGE; - - if (palPath) { - FILE *pal = fopen(palPath, "r"); - if (!pal) err(EX_NOINPUT, "%s", palPath); - - fread(palette, 1, sizeof(palette), pal); - if (ferror(pal)) err(EX_IOERR, "%s", palPath); - - fclose(pal); - } - - FILE *file = path ? fopen(path, "r") : stdin; - if (!file) err(EX_NOINPUT, "%s", path); + if (!width || !scale) return EX_USAGE; if (path) { + int fd = open(path, O_RDONLY); + if (fd < 0) err(EX_NOINPUT, "%s", path); + struct stat stat; - int error = fstat(fileno(file), &stat); + int error = fstat(fd, &stat); if (error) err(EX_IOERR, "%s", path); size = stat.st_size; - } - - data = malloc(size); - if (!data) err(EX_OSERR, "malloc(%zu)", size); - size = fread(data, 1, size, file); - if (ferror(file)) err(EX_IOERR, "%s", path); + data = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0); + if (data == MAP_FAILED) err(EX_IOERR, "%s", path); - fclose(file); + } else { + size = 1024 * 1024; + data = malloc(size); + if (!data) err(EX_OSERR, "malloc(%zu)", size); + size = fread(data, 1, size, stdin); + if (ferror(stdin)) err(EX_IOERR, "stdin"); + } return EX_OK; } static void printOpts(void) { printf( - "gfxx -c %c -b %hhu %s-n %#zx -w %zu %s%s-z %zu\n", - "gpr"[space], - bits, - endian ? "-e " : "", + "gfxx -c %s -e %c -E %c -b %c%c%c%c -n %#zx -w %zu %s%s-z %zu\n", + (const char *[COLOR__MAX]){ "palette", "grayscale", "rgb" }[space], + "lb"[byteOrder], + "lb"[bitOrder], + bits[0] + '0', bits[1] + '0', bits[2] + '0', bits[3] + '0', offset, width, flip ? "-f " : "", @@ -186,104 +196,102 @@ static void put(const struct Iter *it, uint32_t p) { } } +static uint32_t interpolate(uint32_t n) { + uint32_t r, g, b; + if (bitOrder == ENDIAN_LITTLE) { + b = n & MASK(bits[3]); + g = (n >>= bits[3]) & MASK(bits[2]); + r = (n >>= bits[2]) & MASK(bits[1]); + } else { + r = (n >>= bits[0]) & MASK(bits[1]); + g = (n >>= bits[1]) & MASK(bits[2]); + b = (n >>= bits[2]) & MASK(bits[3]); + } + return RGB(SCALE(bits[1], r), SCALE(bits[2], g), SCALE(bits[3], b)); +} + static void drawBits(struct Iter *it) { for (size_t i = offset; i < size; ++i) { - for (int s = 0; s < 8; s += bits) { - uint8_t n = data[i] >> (endian ? 8 - bits - s : s) & MASK(bits); + for (uint8_t b = 0; b < 8; b += BITS_TOTAL) { + uint8_t n; + if (byteOrder == ENDIAN_BIG) { + n = data[i] >> (8 - BITS_TOTAL - b) & MASK(BITS_TOTAL); + } else { + n = data[i] >> b & MASK(BITS_TOTAL); + } if (space == COLOR_PALETTE) { put(it, palette[n]); - } else if (space == COLOR_RGB && bits == 4) { - put(it, RGB(SCALE(1, n & 1), SCALE(1, n & 2), SCALE(1, n & 4))); - } else { - put(it, GRAY(SCALE(bits, n))); + } else if (space == COLOR_GRAYSCALE) { + put(it, GRAY(SCALE(BITS_COLOR, n))); + } else if (space == COLOR_RGB) { + put(it, interpolate(n)); } if (!next(it)) return; } } } -static void draw8(struct Iter *it) { - for (size_t i = offset; i < size; ++i) { - if (space == COLOR_GRAYSCALE) { - put(it, GRAY(data[i])); - } else if (space == COLOR_PALETTE) { - put(it, palette[data[i]]); - } else { - uint32_t r = (endian ? data[i] >> 5 : data[i] >> 0) & MASK(3); - uint32_t g = (endian ? data[i] >> 2 : data[i] >> 3) & MASK(3); - uint32_t b = (endian ? data[i] >> 0 : data[i] >> 6) & MASK(2); - put(it, RGB(SCALE(3, r), SCALE(3, g), SCALE(2, b))); +static void drawBytes(struct Iter *it) { + uint8_t bytes = (BITS_TOTAL + 7) / 8; + for (size_t i = offset; i < size; i += bytes) { + uint32_t n = 0; + for (size_t b = 0; b < bytes; ++b) { + n <<= 8; + n |= (byteOrder == ENDIAN_BIG) ? data[i+b] : data[i+bytes-b-1]; } - if (!next(it)) break; - } -} - -static void draw16(struct Iter *it) { - for (size_t i = offset; i + 1 < size; i += 2) { - uint16_t n = (endian) - ? (uint16_t)data[i+0] << 8 | (uint16_t)data[i+1] - : (uint16_t)data[i+1] << 8 | (uint16_t)data[i+0]; - uint32_t r = n >> 11 & MASK(5); - uint32_t g = n >> 5 & MASK(6); - uint32_t b = n >> 0 & MASK(5); - put(it, RGB(SCALE(5, r), SCALE(6, g), SCALE(5, b))); - if (!next(it)) break; - } -} - -static void draw24(struct Iter *it) { - for (size_t i = offset; i + 2 < size; i += 3) { - if (endian) { - put(it, RGB(data[i + 0], data[i + 1], data[i + 2])); - } else { - put(it, RGB(data[i + 2], data[i + 1], data[i + 0])); - } - if (!next(it)) break; - } -} - -static void draw32(struct Iter *it) { - for (size_t i = offset; i + 3 < size; i += 4) { - if (endian) { - put(it, RGB(data[i + 1], data[i + 2], data[i + 3])); - } else { - put(it, RGB(data[i + 2], data[i + 1], data[i + 0])); + if (space == COLOR_PALETTE) { + put(it, palette[n & 0xFF]); + } else if (space == COLOR_GRAYSCALE) { + put(it, GRAY(SCALE(BITS_COLOR, n & MASK(BITS_COLOR)))); + } else if (space == COLOR_RGB) { + put(it, interpolate(n)); } - if (!next(it)) break; + if (!next(it)) return; } } extern void draw(uint32_t *buf, size_t xres, size_t yres) { memset(buf, 0, 4 * xres * yres); struct Iter it = iter(buf, xres, yres); - switch (bits) { - case 8: draw8(&it); break; - case 16: draw16(&it); break; - case 24: draw24(&it); break; - case 32: draw32(&it); break; - default: drawBits(&it); + if (BITS_TOTAL >= 8) { + drawBytes(&it); + } else { + drawBits(&it); } } -static void samplePalette(void) { - size_t temp = scale; - scale = 1; - draw(palette, 256, 1); - scale = temp; +#define PRESETS_LEN (sizeof(PRESETS) / sizeof(PRESETS[0])) +static const uint8_t PRESETS[][4] = { + { 0, 0, 1, 0 }, + { 0, 1, 1, 0 }, + { 1, 1, 1, 1 }, + { 2, 2, 2, 2 }, + { 0, 3, 3, 2 }, + { 1, 5, 5, 5 }, + { 0, 5, 6, 5 }, + { 0, 8, 8, 8 }, + { 8, 8, 8, 8 }, +}; +static uint8_t preset = PRESETS_LEN - 1; + +static void setPreset(void) { + for (int i = 0; i < 4; ++i) { + bits[i] = PRESETS[preset][i]; + } } extern void input(char in) { - size_t pixel = (bits + 7) / 8; - size_t row = width * bits / 8; + size_t pixel = (BITS_TOTAL + 7) / 8; + size_t row = width * pixel; switch (in) { case 'q': printOpts(); exit(EX_OK); break; case 'o': printOpts(); break; case '[': if (!space--) space = COLOR__MAX - 1; break; case ']': if (++space == COLOR__MAX) space = 0; - break; case 'p': samplePalette(); - break; case '{': if (bits > 16) bits -= 8; else bits = (bits + 1) / 2; - break; case '}': if (bits < 16) bits *= 2; else if (bits < 32) bits += 8; - break; case 'e': endian ^= true; + break; case '{': if (!preset--) preset = PRESETS_LEN - 1; setPreset(); + break; case '}': if (++preset == PRESETS_LEN) preset = 0; setPreset(); + break; case 'e': byteOrder ^= ENDIAN_BIG; + break; case 'E': bitOrder ^= ENDIAN_BIG; break; case 'h': if (offset) offset--; break; case 'j': offset += pixel; break; case 'k': if (offset >= pixel) offset -= pixel; |