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sm64pc/tools/n64graphics.c

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#include <stdio.h>
#include <stdlib.h>
#include <strings.h>
#define STBI_NO_LINEAR
#define STBI_NO_HDR
#define STBI_NO_TGA
#define STB_IMAGE_IMPLEMENTATION
#include <stb/stb_image.h>
#define STB_IMAGE_WRITE_IMPLEMENTATION
#include <stb/stb_image_write.h>
#include "n64graphics.h"
#include "utils.h"
// SCALE_M_N: upscale/downscale M-bit integer to N-bit
#define SCALE_5_8(VAL_) (((VAL_) * 0xFF) / 0x1F)
#define SCALE_8_5(VAL_) ((((VAL_) + 4) * 0x1F) / 0xFF)
#define SCALE_4_8(VAL_) ((VAL_) * 0x11)
#define SCALE_8_4(VAL_) ((VAL_) / 0x11)
#define SCALE_3_8(VAL_) ((VAL_) * 0x24)
#define SCALE_8_3(VAL_) ((VAL_) / 0x24)
typedef enum
{
IMG_FORMAT_RGBA,
IMG_FORMAT_IA,
IMG_FORMAT_I,
IMG_FORMAT_CI,
} img_format;
//---------------------------------------------------------
// N64 RGBA/IA/I/CI -> internal RGBA/IA
//---------------------------------------------------------
rgba *raw2rgba(const uint8_t *raw, int width, int height, int depth)
{
rgba *img;
int img_size;
img_size = width * height * sizeof(*img);
img = malloc(img_size);
if (!img) {
ERROR("Error allocating %d bytes\n", img_size);
return NULL;
}
if (depth == 16) {
for (int i = 0; i < width * height; i++) {
img[i].red = SCALE_5_8((raw[i*2] & 0xF8) >> 3);
img[i].green = SCALE_5_8(((raw[i*2] & 0x07) << 2) | ((raw[i*2+1] & 0xC0) >> 6));
img[i].blue = SCALE_5_8((raw[i*2+1] & 0x3E) >> 1);
img[i].alpha = (raw[i*2+1] & 0x01) ? 0xFF : 0x00;
}
} else if (depth == 32) {
for (int i = 0; i < width * height; i++) {
img[i].red = raw[i*4];
img[i].green = raw[i*4+1];
img[i].blue = raw[i*4+2];
img[i].alpha = raw[i*4+3];
}
}
return img;
}
ia *raw2ia(const uint8_t *raw, int width, int height, int depth)
{
ia *img;
int img_size;
img_size = width * height * sizeof(*img);
img = malloc(img_size);
if (!img) {
ERROR("Error allocating %u bytes\n", img_size);
return NULL;
}
switch (depth) {
case 16:
for (int i = 0; i < width * height; i++) {
img[i].intensity = raw[i*2];
img[i].alpha = raw[i*2+1];
}
break;
case 8:
for (int i = 0; i < width * height; i++) {
img[i].intensity = SCALE_4_8((raw[i] & 0xF0) >> 4);
img[i].alpha = SCALE_4_8(raw[i] & 0x0F);
}
break;
case 4:
for (int i = 0; i < width * height; i++) {
uint8_t bits;
bits = raw[i/2];
if (i % 2) {
bits &= 0xF;
} else {
bits >>= 4;
}
img[i].intensity = SCALE_3_8((bits >> 1) & 0x07);
img[i].alpha = (bits & 0x01) ? 0xFF : 0x00;
}
break;
case 1:
for (int i = 0; i < width * height; i++) {
uint8_t bits;
uint8_t mask;
bits = raw[i/8];
mask = 1 << (7 - (i % 8)); // MSb->LSb
bits = (bits & mask) ? 0xFF : 0x00;
img[i].intensity = bits;
img[i].alpha = bits;
}
break;
default:
ERROR("Error invalid depth %d\n", depth);
break;
}
return img;
}
ia *raw2i(const uint8_t *raw, int width, int height, int depth)
{
ia *img = NULL;
int img_size;
img_size = width * height * sizeof(*img);
img = malloc(img_size);
if (!img) {
ERROR("Error allocating %u bytes\n", img_size);
return NULL;
}
switch (depth) {
case 8:
for (int i = 0; i < width * height; i++) {
img[i].intensity = raw[i];
img[i].alpha = 0xFF;
}
break;
case 4:
for (int i = 0; i < width * height; i++) {
uint8_t bits;
bits = raw[i/2];
if (i % 2) {
bits &= 0xF;
} else {
bits >>= 4;
}
img[i].intensity = SCALE_4_8(bits);
img[i].alpha = 0xFF;
}
break;
default:
ERROR("Error invalid depth %d\n", depth);
break;
}
return img;
}
// extract RGBA from CI raw data and palette
// TODO: different palette depths
rgba *rawci2rgba(const uint8_t *rawci, const uint8_t *palette, int width, int height, int depth)
{
uint8_t *raw_rgba;
rgba *img = NULL;
int raw_size;
// first convert to raw RGBA
raw_size = 2 * width * height;
raw_rgba = malloc(raw_size);
if (!raw_rgba) {
ERROR("Error allocating %u bytes\n", raw_size);
return NULL;
}
for (int i = 0; i < width * height; i++) {
raw_rgba[2*i] = palette[2*rawci[i]];
raw_rgba[2*i+1] = palette[2*rawci[i]+1];
}
// then convert to RGBA image data
img = raw2rgba(raw_rgba, width, height, depth);
free(raw_rgba);
return img;
}
//---------------------------------------------------------
// internal RGBA/IA -> N64 RGBA/IA/I/CI
// returns length written to 'raw' used or -1 on error
//---------------------------------------------------------
int rgba2raw(uint8_t *raw, const rgba *img, int width, int height, int depth)
{
int size = width * height * depth / 8;
INFO("Converting RGBA%d %dx%d to raw\n", depth, width, height);
if (depth == 16) {
for (int i = 0; i < width * height; i++) {
uint8_t r, g, b, a;
r = SCALE_8_5(img[i].red);
g = SCALE_8_5(img[i].green);
b = SCALE_8_5(img[i].blue);
a = img[i].alpha ? 0x1 : 0x0;
raw[i*2] = (r << 3) | (g >> 2);
raw[i*2+1] = ((g & 0x3) << 6) | (b << 1) | a;
}
} else if (depth == 32) {
for (int i = 0; i < width * height; i++) {
raw[i*4] = img[i].red;
raw[i*4+1] = img[i].green;
raw[i*4+2] = img[i].blue;
raw[i*4+3] = img[i].alpha;
}
} else {
ERROR("Error invalid depth %d\n", depth);
size = -1;
}
return size;
}
int ia2raw(uint8_t *raw, const ia *img, int width, int height, int depth)
{
int size = width * height * depth / 8;
INFO("Converting IA%d %dx%d to raw\n", depth, width, height);
switch (depth) {
case 16:
for (int i = 0; i < width * height; i++) {
raw[i*2] = img[i].intensity;
raw[i*2+1] = img[i].alpha;
}
break;
case 8:
for (int i = 0; i < width * height; i++) {
uint8_t val = SCALE_8_4(img[i].intensity);
uint8_t alpha = SCALE_8_4(img[i].alpha);
raw[i] = (val << 4) | alpha;
}
break;
case 4:
for (int i = 0; i < width * height; i++) {
uint8_t val = SCALE_8_3(img[i].intensity);
uint8_t alpha = img[i].alpha ? 0x01 : 0x00;
uint8_t old = raw[i/2];
if (i % 2) {
raw[i/2] = (old & 0xF0) | (val << 1) | alpha;
} else {
raw[i/2] = (old & 0x0F) | (((val << 1) | alpha) << 4);
}
}
break;
case 1:
for (int i = 0; i < width * height; i++) {
uint8_t val = img[i].intensity;
uint8_t old = raw[i/8];
uint8_t bit = 1 << (7 - (i % 8));
if (val) {
raw[i/8] = old | bit;
} else {
raw[i/8] = old & (~bit);
}
}
break;
default:
ERROR("Error invalid depth %d\n", depth);
size = -1;
break;
}
return size;
}
int i2raw(uint8_t *raw, const ia *img, int width, int height, int depth)
{
int size = width * height * depth / 8;
INFO("Converting I%d %dx%d to raw\n", depth, width, height);
switch (depth) {
case 8:
for (int i = 0; i < width * height; i++) {
raw[i] = img[i].intensity;
}
break;
case 4:
for (int i = 0; i < width * height; i++) {
uint8_t val = SCALE_8_4(img[i].intensity);
uint8_t old = raw[i/2];
if (i % 2) {
raw[i/2] = (old & 0xF0) | val;
} else {
raw[i/2] = (old & 0x0F) | (val << 4);
}
}
break;
default:
ERROR("Error invalid depth %d\n", depth);
size = -1;
break;
}
return size;
}
//---------------------------------------------------------
// internal RGBA/IA -> PNG
//---------------------------------------------------------
int rgba2png(const char *png_filename, const rgba *img, int width, int height)
{
int ret = 0;
INFO("Saving RGBA %dx%d to \"%s\"\n", width, height, png_filename);
// convert to format stb_image_write expects
uint8_t *data = malloc(4*width*height);
if (data) {
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {
int idx = j*width + i;
data[4*idx] = img[idx].red;
data[4*idx + 1] = img[idx].green;
data[4*idx + 2] = img[idx].blue;
data[4*idx + 3] = img[idx].alpha;
}
}
ret = stbi_write_png(png_filename, width, height, 4, data, 0);
free(data);
}
return ret;
}
int ia2png(const char *png_filename, const ia *img, int width, int height)
{
int ret = 0;
INFO("Saving IA %dx%d to \"%s\"\n", width, height, png_filename);
// convert to format stb_image_write expects
uint8_t *data = malloc(2*width*height);
if (data) {
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {
int idx = j*width + i;
data[2*idx] = img[idx].intensity;
data[2*idx + 1] = img[idx].alpha;
}
}
ret = stbi_write_png(png_filename, width, height, 2, data, 0);
free(data);
}
return ret;
}
//---------------------------------------------------------
// PNG -> internal RGBA/IA
//---------------------------------------------------------
rgba *png2rgba(const char *png_filename, int *width, int *height)
{
rgba *img = NULL;
int w = 0;
int h = 0;
int channels = 0;
int img_size;
stbi_uc *data = stbi_load(png_filename, &w, &h, &channels, STBI_default);
if (!data || w <= 0 || h <= 0) {
ERROR("Error loading \"%s\"\n", png_filename);
return NULL;
}
INFO("Read \"%s\" %dx%d channels: %d\n", png_filename, w, h, channels);
img_size = w * h * sizeof(*img);
img = malloc(img_size);
if (!img) {
ERROR("Error allocating %u bytes\n", img_size);
return NULL;
}
switch (channels) {
case 3: // red, green, blue
case 4: // red, green, blue, alpha
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
int idx = j*w + i;
img[idx].red = data[channels*idx];
img[idx].green = data[channels*idx + 1];
img[idx].blue = data[channels*idx + 2];
if (channels == 4) {
img[idx].alpha = data[channels*idx + 3];
} else {
img[idx].alpha = 0xFF;
}
}
}
break;
case 2: // grey, alpha
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
int idx = j*w + i;
img[idx].red = data[2*idx];
img[idx].green = data[2*idx];
img[idx].blue = data[2*idx];
img[idx].alpha = data[2*idx + 1];
}
}
break;
default:
ERROR("Don't know how to read channels: %d\n", channels);
free(img);
img = NULL;
}
// cleanup
stbi_image_free(data);
*width = w;
*height = h;
return img;
}
ia *png2ia(const char *png_filename, int *width, int *height)
{
ia *img = NULL;
int w = 0, h = 0;
int channels = 0;
int img_size;
stbi_uc *data = stbi_load(png_filename, &w, &h, &channels, STBI_default);
if (!data || w <= 0 || h <= 0) {
ERROR("Error loading \"%s\"\n", png_filename);
return NULL;
}
INFO("Read \"%s\" %dx%d channels: %d\n", png_filename, w, h, channels);
img_size = w * h * sizeof(*img);
img = malloc(img_size);
if (!img) {
ERROR("Error allocating %d bytes\n", img_size);
return NULL;
}
switch (channels) {
case 3: // red, green, blue
case 4: // red, green, blue, alpha
ERROR("Warning: averaging RGB PNG to create IA\n");
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
int idx = j*w + i;
int sum = data[channels*idx] + data[channels*idx + 1] + data[channels*idx + 2];
img[idx].intensity = (sum + 1) / 3; // add 1 to round up where appropriate
if (channels == 4) {
img[idx].alpha = data[channels*idx + 3];
} else {
img[idx].alpha = 0xFF;
}
}
}
break;
case 2: // grey, alpha
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
int idx = j*w + i;
img[idx].intensity = data[2*idx];
img[idx].alpha = data[2*idx + 1];
}
}
break;
default:
ERROR("Don't know how to read channels: %d\n", channels);
free(img);
img = NULL;
}
// cleanup
stbi_image_free(data);
*width = w;
*height = h;
return img;
}
const char *n64graphics_get_read_version(void)
{
return "stb_image 2.19";
}
const char *n64graphics_get_write_version(void)
{
return "stb_image_write 1.09";
}
#ifdef N64GRAPHICS_STANDALONE
#define N64GRAPHICS_VERSION "0.3"
#include <string.h>
typedef enum
{
MODE_EXPORT,
MODE_IMPORT,
} tool_mode;
typedef struct
{
char *img_filename;
char *bin_filename;
tool_mode mode;
unsigned int offset;
img_format format;
int depth;
int width;
int height;
int truncate;
} graphics_config;
static const graphics_config default_config =
{
.img_filename = NULL,
.bin_filename = NULL,
.mode = MODE_EXPORT,
.offset = 0,
.format = IMG_FORMAT_RGBA,
.depth = 16,
.width = 32,
.height = 32,
.truncate = 1,
};
typedef struct
{
const char *name;
img_format format;
int depth;
} format_entry;
static const format_entry format_table[] =
{
{"rgba16", IMG_FORMAT_RGBA, 16},
{"rgba32", IMG_FORMAT_RGBA, 32},
{"ia1", IMG_FORMAT_IA, 1},
{"ia4", IMG_FORMAT_IA, 4},
{"ia8", IMG_FORMAT_IA, 8},
{"ia16", IMG_FORMAT_IA, 16},
{"i4", IMG_FORMAT_I, 4},
{"i8", IMG_FORMAT_I, 8},
{"ci8", IMG_FORMAT_CI, 8},
{"ci16", IMG_FORMAT_CI, 16},
};
static const char *format2str(img_format format, int depth)
{
for (unsigned i = 0; i < DIM(format_table); i++) {
if (format == format_table[i].format && depth == format_table[i].depth) {
return format_table[i].name;
}
}
return "unknown";
}
static int parse_format(graphics_config *config, const char *str)
{
for (unsigned i = 0; i < DIM(format_table); i++) {
if (!strcasecmp(str, format_table[i].name)) {
config->format = format_table[i].format;
config->depth = format_table[i].depth;
return 1;
}
}
return 0;
}
static void print_usage(void)
{
ERROR("Usage: n64graphics -e/-i BIN_FILE -g PNG_FILE [-o offset] [-f FORMAT] [-w WIDTH] [-h HEIGHT] [-V]\n"
"\n"
"n64graphics v" N64GRAPHICS_VERSION ": N64 graphics manipulator\n"
"\n"
"Required arguments:\n"
" -e BIN_FILE export from BIN_FILE to PNG_FILE\n"
" -i BIN_FILE import from PNG_FILE to BIN_FILE\n"
" -g PNG_FILE graphics file to import/export (.png)\n"
"Optional arguments:\n"
" -o OFFSET starting offset in BIN_FILE (prevents truncation during import)\n"
" -f FORMAT texture format: rgba16, rgba32, ia1, ia4, ia8, ia16, i4, i8, ci8, ci16 (default: %s)\n"
" -w WIDTH export texture width (default: %d)\n"
" -h HEIGHT export texture height (default: %d)\n"
" -v verbose logging\n"
" -V print version information\n",
format2str(default_config.format, default_config.depth),
default_config.width,
default_config.height);
}
static void print_version(void)
{
ERROR("n64graphics v" N64GRAPHICS_VERSION ", using:\n"
" %s\n"
" %s\n",
n64graphics_get_read_version(), n64graphics_get_write_version());
}
// parse command line arguments
static int parse_arguments(int argc, char *argv[], graphics_config *config)
{
for (int i = 1; i < argc; i++) {
if (argv[i][0] == '-') {
switch (argv[i][1]) {
case 'e':
if (++i >= argc) return 0;
config->bin_filename = argv[i];
config->mode = MODE_EXPORT;
break;
case 'f':
if (++i >= argc) return 0;
if (!parse_format(config, argv[i])) {
return 0;
}
break;
case 'i':
if (++i >= argc) return 0;
config->bin_filename = argv[i];
config->mode = MODE_IMPORT;
break;
case 'g':
if (++i >= argc) return 0;
config->img_filename = argv[i];
break;
case 'h':
if (++i >= argc) return 0;
config->height = strtoul(argv[i], NULL, 0);
break;
case 'o':
if (++i >= argc) return 0;
config->offset = strtoul(argv[i], NULL, 0);
config->truncate = 0;
break;
case 'w':
if (++i >= argc) return 0;
config->width = strtoul(argv[i], NULL, 0);
break;
case 'v':
g_verbosity = 1;
break;
case 'V':
print_version();
exit(0);
break;
default:
return 0;
break;
}
} else {
return 0;
}
}
return 1;
}
int main(int argc, char *argv[])
{
graphics_config config = default_config;
rgba *imgr;
ia *imgi;
FILE *fp;
uint8_t *raw;
int raw_size;
int length = 0;
int flength;
int res;
int valid = parse_arguments(argc, argv, &config);
if (!valid || !config.bin_filename || !config.bin_filename) {
print_usage();
exit(EXIT_FAILURE);
}
if (config.mode == MODE_IMPORT) {
if (config.truncate) {
fp = fopen(config.bin_filename, "wb");
} else {
fp = fopen(config.bin_filename, "r+b");
}
if (!fp) {
ERROR("Error opening \"%s\"\n", config.bin_filename);
return -1;
}
if (!config.truncate) {
fseek(fp, config.offset, SEEK_SET);
}
switch (config.format) {
case IMG_FORMAT_RGBA:
imgr = png2rgba(config.img_filename, &config.width, &config.height);
raw_size = config.width * config.height * config.depth / 8;
raw = malloc(raw_size);
if (!raw) {
ERROR("Error allocating %u bytes\n", raw_size);
}
length = rgba2raw(raw, imgr, config.width, config.height, config.depth);
break;
case IMG_FORMAT_IA:
imgi = png2ia(config.img_filename, &config.width, &config.height);
raw_size = config.width * config.height * config.depth / 8;
raw = malloc(raw_size);
if (!raw) {
ERROR("Error allocating %u bytes\n", raw_size);
}
length = ia2raw(raw, imgi, config.width, config.height, config.depth);
break;
case IMG_FORMAT_I:
imgi = png2ia(config.img_filename, &config.width, &config.height);
raw_size = config.width * config.height * config.depth / 8;
raw = malloc(raw_size);
if (!raw) {
ERROR("Error allocating %u bytes\n", raw_size);
}
length = i2raw(raw, imgi, config.width, config.height, config.depth);
break;
default:
return EXIT_FAILURE;
}
if (length <= 0) {
ERROR("Error converting to raw format\n");
return EXIT_FAILURE;
}
INFO("Writing 0x%X bytes to offset 0x%X of \"%s\"\n", length, config.offset, config.bin_filename);
flength = fwrite(raw, 1, length, fp);
if (flength != length) {
ERROR("Error writing %d bytes to \"%s\"\n", length, config.bin_filename);
}
fclose(fp);
} else {
if (config.width <= 0 || config.height <= 0 || config.depth <= 0) {
ERROR("Error: must set position width and height for export\n");
return EXIT_FAILURE;
}
fp = fopen(config.bin_filename, "rb");
if (!fp) {
ERROR("Error opening \"%s\"\n", config.bin_filename);
return -1;
}
raw_size = config.width * config.height * config.depth / 8;
raw = malloc(raw_size);
if (config.offset > 0) {
fseek(fp, config.offset, SEEK_SET);
}
flength = fread(raw, 1, raw_size, fp);
if (flength != raw_size) {
ERROR("Error reading %d bytes from \"%s\"\n", raw_size, config.bin_filename);
}
switch (config.format) {
case IMG_FORMAT_RGBA:
imgr = raw2rgba(raw, config.width, config.height, config.depth);
res = rgba2png(config.img_filename, imgr, config.width, config.height);
break;
case IMG_FORMAT_IA:
imgi = raw2ia(raw, config.width, config.height, config.depth);
res = ia2png(config.img_filename, imgi, config.width, config.height);
break;
case IMG_FORMAT_I:
imgi = raw2i(raw, config.width, config.height, config.depth);
res = ia2png(config.img_filename, imgi, config.width, config.height);
break;
default:
return EXIT_FAILURE;
}
if (!res) {
ERROR("Error writing to \"%s\"\n", config.img_filename);
}
}
return EXIT_SUCCESS;
}
#endif // N64GRAPHICS_STANDALONE
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