diff options
Diffstat (limited to 'gfx/gfxx.c')
| -rw-r--r-- | gfx/gfxx.c | 470 |
1 files changed, 0 insertions, 470 deletions
diff --git a/gfx/gfxx.c b/gfx/gfxx.c deleted file mode 100644 index 7373fd4b..00000000 --- a/gfx/gfxx.c +++ /dev/null @@ -1,470 +0,0 @@ -/* Copyright (C) 2018 C. McEnroe <june@causal.agency> - * - * 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 <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 "gfx.h" -#include "png.h" - -#define MAX(a, b) ((a) > (b) ? (a) : (b)) -#define MASK(b) ((1 << (b)) - 1) - -static uint32_t rgb(uint8_t r, uint8_t g, uint8_t b) { - return (uint32_t)r << 16 | (uint32_t)g << 8 | (uint32_t)b; -} -static uint32_t gray(uint8_t n) { - return rgb(n, n, n); -} - -static enum { - ColorIndexed, - ColorGrayscale, - ColorRGB, - ColorCount, -} space = ColorRGB; -static const char *ColorStr[ColorCount] = { "indexed", "grayscale", "rgb" }; -static uint32_t palette[256]; - -static enum { - EndianLittle, - EndianBig, -} byteOrder, bitOrder; - -enum { Pad, R, G, B }; -static uint8_t bits[4] = { 8, 8, 8, 8 }; - -static uint8_t bitsColor(void) { - return bits[R] + bits[G] + bits[B]; -} -static uint8_t bitsTotal(void) { - return bits[Pad] + bitsColor(); -} - -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) { - break; case 'c': - switch (optarg[0]) { - break; case 'i': space = ColorIndexed; - break; case 'g': space = ColorGrayscale; - break; case 'r': space = ColorRGB; - break; default: return EX_USAGE; - } - break; case 'p': pal = optarg; - break; case 'e': - switch (optarg[0]) { - break; case 'l': byteOrder = EndianLittle; - break; case 'b': byteOrder = EndianBig; - break; default: return EX_USAGE; - } - break; case 'E': - switch (optarg[0]) { - break; case 'l': bitOrder = EndianLittle; - break; case 'b': bitOrder = EndianBig; - 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 0x%zX %s%s-w %zu -z %zu", - ColorStr[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 orig) { - uint32_t r, g, b; - if (bitOrder == EndianLittle) { - b = orig & MASK(bits[B]); - g = (orig >>= bits[B]) & MASK(bits[G]); - r = (orig >>= bits[G]) & MASK(bits[R]); - } else { - r = orig & MASK(bits[R]); - g = (orig >>= bits[R]) & MASK(bits[G]); - b = (orig >>= 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 += bitsTotal()) { - uint8_t n; - if (byteOrder == EndianBig) { - n = data[i] >> (8 - bitsTotal() - b) & MASK(bitsTotal()); - } else { - n = data[i] >> b & MASK(bitsTotal()); - } - - if (space == ColorIndexed) { - put(it, palette[n]); - } else if (space == ColorGrayscale) { - put(it, gray(interp(bitsColor(), n & MASK(bitsColor())))); - } else if (space == ColorRGB) { - put(it, interpolate(n)); - } - - if (!next(it)) return; - } - } -} - -static void drawBytes(struct Iter *it) { - uint8_t bytes = (bitsTotal() + 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 == EndianBig) ? data[i + b] : data[i + bytes - b - 1]; - } - - if (space == ColorIndexed) { - put(it, palette[n & 0xFF]); - } else if (space == ColorGrayscale) { - put(it, gray(interp(bitsColor(), n & MASK(bitsColor())))); - } else if (space == ColorRGB) { - 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 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]; - } - } - - outOpen("png"); - if (!out.file) return; - - const char Software[] = "Software"; - formatOptions(); - uint8_t sbit[3] = { MAX(bits[R], 1), MAX(bits[G], 1), MAX(bits[B], 1) }; - - pngHead(out.file, srcWidth, srcHeight, 8, PNGTruecolor); - - pngChunk(out.file, "tEXt", sizeof(Software) + strlen(options)); - pngWrite(out.file, (uint8_t *)Software, sizeof(Software)); - pngWrite(out.file, (uint8_t *)options, strlen(options)); - pngInt32(out.file, ~pngCRC); - - pngChunk(out.file, "sBIT", sizeof(sbit)); - pngWrite(out.file, sbit, sizeof(sbit)); - pngInt32(out.file, ~pngCRC); - - pngData(out.file, data, sizeof(data)); - pngTail(out.file); - - error = fclose(out.file); - if (error) err(EX_IOERR, "%s", out.path); -} - -static enum { - DumpNone, - DumpOne, - DumpAll, -} 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 (bitsTotal() >= 8) { - drawBytes(&it); - } else { - drawBits(&it); - } - if (dump) pngDump(buf, bufWidth, bufHeight); - if (dump == DumpOne) dump = DumpNone; -} - -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 }, -}; -static const size_t PresetsLen = sizeof(Presets) / sizeof(Presets[0]); - -static uint8_t preset = PresetsLen - 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 = (bitsTotal() + 7) / 8; - size_t row = width * bitsTotal() / 8; - switch (in) { - break; case 'q': return false; - break; case 'x': dump = DumpOne; - break; case 'X': dump ^= DumpAll; - break; case 'o': formatOptions(); printf("%s\n", options); - break; case '[': if (!space--) space = ColorCount - 1; - break; case ']': if (++space == ColorCount) space = 0; - break; case 'p': palSample(); - break; case 'P': palDump(); - break; case '{': if (!preset--) preset = PresetsLen - 1; setPreset(); - break; case '}': if (++preset == PresetsLen) preset = 0; setPreset(); - break; case 'e': byteOrder ^= EndianBig; - break; case 'E': bitOrder ^= EndianBig; - 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; -} |