diff options
Diffstat (limited to 'bin/gfxx.c')
| -rw-r--r-- | bin/gfxx.c | 492 |
1 files changed, 492 insertions, 0 deletions
diff --git a/bin/gfxx.c b/bin/gfxx.c new file mode 100644 index 00000000..8a43fd2f --- /dev/null +++ b/bin/gfxx.c @@ -0,0 +1,492 @@ +/* Copyright (c) 2018, Curtis McEnroe <programble@gmail.com> + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU Affero General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Affero General Public License for more details. + * + * You should have received a copy of the GNU Affero General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +#include <arpa/inet.h> +#include <err.h> +#include <fcntl.h> +#include <math.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> +#include <zlib.h> + +#include "gfx/gfx.h" + +#define MAX(a, b) ((a) > (b) ? (a) : (b)) +#define MASK(b) ((1 << (b)) - 1) + +#define RGB(r, g, b) ((uint32_t)(r) << 16 | (uint32_t)(g) << 8 | (uint32_t)(b)) +#define GRAY(n) RGB(n, n, n) + +static enum { + COLOR_INDEXED, + COLOR_GRAYSCALE, + COLOR_RGB, + COLOR__COUNT, +} space = COLOR_RGB; +static const char *COLOR__STR[COLOR__COUNT] = { "indexed", "grayscale", "rgb" }; +static uint32_t palette[256]; + +static enum { + ENDIAN_LITTLE, + ENDIAN_BIG, +} byteOrder, bitOrder; + +enum { PAD, R, G, B }; +static uint8_t bits[4] = { 8, 8, 8, 8 }; +#define BITS_COLOR (bits[R] + bits[G] + bits[B]) +#define BITS_TOTAL (bits[PAD] + BITS_COLOR) + +static size_t offset; +static size_t width = 16; +static bool flip; +static bool mirror; +static size_t scale = 1; + +static const char *prefix = "gfxx"; + +static size_t size; +static uint8_t *data; + +int init(int argc, char *argv[]) { + const char *pal = NULL; + const char *path = NULL; + + int opt; + while (0 < (opt = getopt(argc, argv, "c:p:b:e:E:n:fmw:z:o:"))) { + switch (opt) { + case 'c': switch (optarg[0]) { + case 'i': space = COLOR_INDEXED; break; + case 'g': space = COLOR_GRAYSCALE; break; + case 'r': space = COLOR_RGB; break; + default: return EX_USAGE; + } break; + case 'p': pal = optarg; 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': { + if (strlen(optarg) < 4) return EX_USAGE; + for (int i = 0; i < 4; ++i) { + bits[i] = optarg[i] - '0'; + } + } break; + case 'n': offset = strtoul(optarg, NULL, 0); break; + case 'f': flip ^= true; break; + case 'm': mirror ^= true; break; + case 'w': width = strtoul(optarg, NULL, 0); break; + case 'z': scale = strtoul(optarg, NULL, 0); break; + case 'o': prefix = optarg; break; + default: return EX_USAGE; + } + } + if (argc > optind) path = argv[optind]; + if (!width || !scale) return EX_USAGE; + + if (pal) { + FILE *file = fopen(pal, "r"); + if (!file) err(EX_NOINPUT, "%s", pal); + fread(palette, 4, 256, file); + if (ferror(file)) err(EX_IOERR, "%s", pal); + fclose(file); + } else { + for (int i = 0; i < 256; ++i) { + double h = i / 256.0 * 6.0; + double x = 1.0 - fabs(fmod(h, 2.0) - 1.0); + double r = 255.0, g = 255.0, b = 255.0; + if (h <= 1.0) { g *= x; b = 0.0; } + else if (h <= 2.0) { r *= x; b = 0.0; } + else if (h <= 3.0) { r = 0.0; b *= x; } + else if (h <= 4.0) { r = 0.0; g *= x; } + else if (h <= 5.0) { r *= x; g = 0.0; } + else if (h <= 6.0) { g = 0.0; b *= x; } + palette[i] = (uint32_t)r << 16 | (uint32_t)g << 8 | (uint32_t)b; + } + } + + if (path) { + int fd = open(path, O_RDONLY); + if (fd < 0) err(EX_NOINPUT, "%s", path); + + struct stat stat; + int error = fstat(fd, &stat); + if (error) err(EX_IOERR, "%s", path); + size = stat.st_size; + + data = mmap(NULL, size, PROT_READ, MAP_SHARED, fd, 0); + if (data == MAP_FAILED) err(EX_IOERR, "%s", path); + + } 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 char options[128]; +static void formatOptions(void) { + snprintf( + options, sizeof(options), + "gfxx -c %s -e%c -E%c -b %hhu%hhu%hhu%hhu -n %#zx %s%s-w %zu -z %zu", + COLOR__STR[space], + "lb"[byteOrder], + "lb"[bitOrder], + bits[PAD], bits[R], bits[G], bits[B], + offset, + flip ? "-f " : "", + mirror ? "-m " : "", + width, + scale + ); +} + +const char *status(void) { + formatOptions(); + return options; +} + +struct Iter { + uint32_t *buf; + size_t bufWidth; + size_t bufHeight; + size_t left; + size_t x; + size_t y; +}; + +static struct Iter iter(uint32_t *buf, size_t bufWidth, size_t bufHeight) { + struct Iter it = { .buf = buf, .bufWidth = bufWidth, .bufHeight = bufHeight }; + if (mirror) it.x = width - 1; + if (flip) it.y = bufHeight / scale - 1; + return it; +} + +static bool nextX(struct Iter *it) { + if (mirror) { + if (it->x == it->left) return false; + it->x--; + } else { + it->x++; + if (it->x == it->left + width) return false; + } + return true; +} + +static bool nextY(struct Iter *it) { + if (flip) { + if (it->y == 0) { + it->left += width; + it->y = it->bufHeight / scale; + } + it->y--; + } else { + it->y++; + if (it->y == it->bufHeight / scale) { + it->left += width; + it->y = 0; + } + } + it->x = it->left; + if (mirror) it->x += width - 1; + return (it->left < it->bufWidth / scale); +} + +static bool next(struct Iter *it) { + return nextX(it) || nextY(it); +} + +static void put(const struct Iter *it, uint32_t pixel) { + size_t scaledX = it->x * scale; + size_t scaledY = it->y * scale; + for (size_t fillY = scaledY; fillY < scaledY + scale; ++fillY) { + if (fillY >= it->bufHeight) break; + for (size_t fillX = scaledX; fillX < scaledX + scale; ++fillX) { + if (fillX >= it->bufWidth) break; + it->buf[fillY * it->bufWidth + fillX] = pixel; + } + } +} + +static uint8_t interp(uint8_t b, uint32_t n) { + if (b == 8) return n; + if (b == 0) return 0; + return n * MASK(8) / MASK(b); +} + +static uint32_t interpolate(uint32_t rgb) { + uint32_t r, g, b; + if (bitOrder == ENDIAN_LITTLE) { + b = rgb & MASK(bits[B]); + g = (rgb >>= bits[B]) & MASK(bits[G]); + r = (rgb >>= bits[G]) & MASK(bits[R]); + } else { + r = rgb & MASK(bits[R]); + g = (rgb >>= bits[R]) & MASK(bits[G]); + b = (rgb >>= bits[G]) & MASK(bits[B]); + } + return RGB(interp(bits[R], r), interp(bits[G], g), interp(bits[B], b)); +} + +static void drawBits(struct Iter *it) { + for (size_t i = offset; i < size; ++i) { + 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_INDEXED) { + put(it, palette[n]); + } else if (space == COLOR_GRAYSCALE) { + put(it, GRAY(interp(BITS_COLOR, n & MASK(BITS_COLOR)))); + } else if (space == COLOR_RGB) { + put(it, interpolate(n)); + } + + if (!next(it)) return; + } + } +} + +static void drawBytes(struct Iter *it) { + uint8_t bytes = (BITS_TOTAL + 7) / 8; + for (size_t i = offset; i + bytes <= 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 (space == COLOR_INDEXED) { + put(it, palette[n & 0xFF]); + } else if (space == COLOR_GRAYSCALE) { + put(it, GRAY(interp(BITS_COLOR, n & MASK(BITS_COLOR)))); + } else if (space == COLOR_RGB) { + put(it, interpolate(n)); + } + + if (!next(it)) return; + } +} + +static struct { + unsigned counter; + char path[FILENAME_MAX]; + FILE *file; +} out; +static void outOpen(const char *ext) { + snprintf(out.path, sizeof(out.path), "%s%04u.%s", prefix, ++out.counter, ext); + out.file = fopen(out.path, "wx"); + if (out.file) { + printf("%s\n", out.path); + } else { + warn("%s", out.path); + } +} + +static uint32_t crc; +static void pngWrite(const void *ptr, size_t size) { + fwrite(ptr, size, 1, out.file); + if (ferror(out.file)) err(EX_IOERR, "%s", out.path); + crc = crc32(crc, ptr, size); +} +static void pngUint(uint32_t host) { + uint32_t net = htonl(host); + pngWrite(&net, 4); +} +static void pngChunk(const char *type, uint32_t size) { + pngUint(size); + crc = crc32(0, Z_NULL, 0); + pngWrite(type, 4); +} + +static void pngDump(uint32_t *src, size_t srcWidth, size_t srcHeight) { + int error; + + size_t stride = 1 + 3 * srcWidth; + uint8_t data[stride * srcHeight]; + for (size_t y = 0; y < srcHeight; ++y) { + data[y * stride] = 0; + for (size_t x = 0; x < srcWidth; ++x) { + uint8_t *p = &data[y * stride + 1 + 3 * x]; + p[0] = src[y * srcWidth + x] >> 16; + p[1] = src[y * srcWidth + x] >> 8; + p[2] = src[y * srcWidth + x]; + } + } + + uLong deflateSize = compressBound(sizeof(data)); + uint8_t deflate[deflateSize]; + error = compress(deflate, &deflateSize, data, sizeof(data)); + if (error != Z_OK) errx(EX_SOFTWARE, "compress: %d", error); + + outOpen("png"); + if (!out.file) return; + + const uint8_t SIGNATURE[] = { 0x89, 'P', 'N', 'G', '\r', '\n', 0x1A, '\n' }; + const uint8_t HEADER[] = { 8, 2, 0, 0, 0 }; // 8-bit truecolor + const char SOFTWARE[] = "Software"; + formatOptions(); + uint8_t sbit[3] = { MAX(bits[R], 1), MAX(bits[G], 1), MAX(bits[B], 1) }; + + pngWrite(SIGNATURE, sizeof(SIGNATURE)); + + pngChunk("IHDR", 4 + 4 + sizeof(HEADER)); + pngUint(srcWidth); + pngUint(srcHeight); + pngWrite(HEADER, sizeof(HEADER)); + pngUint(crc); + + pngChunk("tEXt", sizeof(SOFTWARE) + strlen(options)); + pngWrite(SOFTWARE, sizeof(SOFTWARE)); + pngWrite(options, strlen(options)); + pngUint(crc); + + pngChunk("sBIT", sizeof(sbit)); + pngWrite(sbit, sizeof(sbit)); + pngUint(crc); + + pngChunk("IDAT", deflateSize); + pngWrite(deflate, deflateSize); + pngUint(crc); + + pngChunk("IEND", 0); + pngUint(crc); + + error = fclose(out.file); + if (error) err(EX_IOERR, "%s", out.path); +} + +static enum { + DUMP_NONE, + DUMP_ONE, + DUMP_ALL, +} dump; + +void draw(uint32_t *buf, size_t bufWidth, size_t bufHeight) { + memset(buf, 0, 4 * bufWidth * bufHeight); + struct Iter it = iter(buf, bufWidth, bufHeight); + if (BITS_TOTAL >= 8) { + drawBytes(&it); + } else { + drawBits(&it); + } + if (dump) pngDump(buf, bufWidth, bufHeight); + if (dump == DUMP_ONE) dump = DUMP_NONE; +} + +static void palSample(void) { + size_t temp = scale; + scale = 1; + draw(palette, 256, 1); + scale = temp; +} + +static void palDump(void) { + outOpen("dat"); + if (!out.file) return; + + fwrite(palette, 4, 256, out.file); + if (ferror(out.file)) err(EX_IOERR, "%s", out.path); + + int error = fclose(out.file); + if (error) err(EX_IOERR, "%s", out.path); +} + +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 }, + { 4, 4, 4, 4 }, + { 1, 5, 5, 5 }, + { 0, 5, 6, 5 }, + { 0, 8, 8, 8 }, + { 8, 8, 8, 8 }, +}; +#define PRESETS_LEN (sizeof(PRESETS) / sizeof(PRESETS[0])) + +static uint8_t preset = PRESETS_LEN - 1; +static void setPreset(void) { + bits[PAD] = PRESETS[preset][PAD]; + bits[R] = PRESETS[preset][R]; + bits[G] = PRESETS[preset][G]; + bits[B] = PRESETS[preset][B]; +} + +static void setBit(char in) { + static uint8_t bit = 0; + bits[bit++] = in - '0'; + bit &= 3; +} + +bool input(char in) { + size_t pixel = (BITS_TOTAL + 7) / 8; + size_t row = width * BITS_TOTAL / 8; + switch (in) { + case 'q': return false; + break; case 'x': dump = DUMP_ONE; + break; case 'X': dump ^= DUMP_ALL; + break; case 'o': formatOptions(); printf("%s\n", options); + break; case '[': if (!space--) space = COLOR__COUNT - 1; + break; case ']': if (++space == COLOR__COUNT) space = 0; + break; case 'p': palSample(); + break; case 'P': palDump(); + 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; + break; case 'l': offset++; + break; case 'H': if (offset >= row) offset -= row; + break; case 'J': offset += width * row; + break; case 'K': if (offset >= width * row) offset -= width * row; + break; case 'L': offset += row; + break; case '.': width++; + break; case ',': if (width > 1) width--; + break; case '>': width *= 2; + break; case '<': if (width > 1) width /= 2; + break; case 'f': flip ^= true; + break; case 'm': mirror ^= true; + break; case '+': scale++; + break; case '-': if (scale > 1) scale--; + break; default: if (in >= '0' && in <= '9') setBit(in); + } + return true; +} |