Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Refactor of JASC-PAL #620

Open
wants to merge 5 commits into
base: master
Choose a base branch
from
Open

Refactor of JASC-PAL #620

Changes from 3 commits
Commits
Show all changes
5 commits
Select commit Hold shift + click to select a range
c4b6926
Refactor of JASC-PAL
waterwheels May 7, 2023
faae6f1
Integrate fixes suggested by GriffinRichards
waterwheels May 9, 2023
ba8f1d0
Amended typos
waterwheels May 21, 2023
44ef968
ReadJascPaletteLine() checks it found end of line
waterwheels May 22, 2023
220a660
Added additional error checking
waterwheels May 22, 2023
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
168 changes: 54 additions & 114 deletions tools/gbagfx/jasc_pal.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,155 +2,95 @@

#include <stdio.h>
#include <string.h>
#include <errno.h>
#include "global.h"
#include "gfx.h"
#include "util.h"

// Read/write Paint Shop Pro palette files.
// Read/write JASC palette files.

// Format of a Paint Shop Pro palette file, line by line:
// "JASC-PAL\r\n" (signature)
// "0100\r\n" (version; seems to always be "0100")
// "<NUMBER_OF_COLORS>\r\n" (number of colors in decimal)
// Format of a JASC palette file, line by line:
// "JASC-PAL" (signature)
// "0100" (version; seems to always be "0100")
// "<NUMBER_OF_COLORS>" (number of colors in decimal)
//
// <NUMBER_OF_COLORS> times:
// "<RED> <GREEN> <BLUE>\r\n" (color entry)
// "<RED> <GREEN> <BLUE> <ALPHA (discarded if present)>" (color entry)
//
// Line endings can be \r\n or \n
//
// Each color component is a decimal number from 0 to 255.
// Examples:
// Black - "0 0 0\r\n"
// Blue - "0 0 255\r\n"
// Brown - "150 75 0\r\n"
// Black - "0 0 0"
// Blue - "0 0 255"
// Brown - "150 75 0"
// White - "255 255 255 255"
// ^~~ ignored

#define MAX_LINE_LENGTH 11
// 15 chars of color info, \r\n or \n, and \0
#define MAX_LINE_LENGTH 18

void ReadJascPaletteLine(FILE *fp, char *line)
int ReadJascPaletteLine(FILE *fp, char *line)
{
int c;
int length = 0;

for (;;)
{
c = fgetc(fp);

if (c == '\r')
{
c = fgetc(fp);

if (c != '\n')
FATAL_ERROR("CR line endings aren't supported.\n");

line[length] = 0;

return;
}

if (c == '\n')
FATAL_ERROR("LF line endings aren't supported.\n");

if (c == EOF)
FATAL_ERROR("Unexpected EOF. No CRLF at end of file.\n");

if (c == 0)
FATAL_ERROR("NUL character in file.\n");

if (length == MAX_LINE_LENGTH)
{
line[length] = 0;
FATAL_ERROR("The line \"%s\" is too long.\n", line);
}

line[length++] = c;
}
// Read line up to first newline char (inclusive) or [MAX_LINE_LENGTH-1]
if(fgets(line, MAX_LINE_LENGTH, fp) == NULL)
return 0;
line[strcspn(line, "\r\n")] = 0; // Terminate the line at the first newline char
return 1;
}

void ReadJascPalette(char *path, struct Palette *palette)
{
char line[MAX_LINE_LENGTH + 1];

FILE *fp = fopen(path, "rb");

if (fp == NULL)
FATAL_ERROR("Failed to open JASC-PAL file \"%s\" for reading.\n", path);
char line_buffer[MAX_LINE_LENGTH];
int red, green, blue;
int numColors;

ReadJascPaletteLine(fp, line);
FILE *fp = fopen(path, "r");

if (strcmp(line, "JASC-PAL") != 0)
FATAL_ERROR("Invalid JASC-PAL signature.\n");
if (!fp)
FATAL_ERROR("Cannot open JASC-PAL file \"%s\" with error: %s\n", path, strerror(errno));

ReadJascPaletteLine(fp, line);
// Check JASC-PAL Header
ReadJascPaletteLine(fp, line_buffer);
if (strcmp(line_buffer, "JASC-PAL") != 0)
FATAL_ERROR("Invalid signature, expected \"JASC-PAL\", read: \"%s\"\n",line_buffer);

if (strcmp(line, "0100") != 0)
ReadJascPaletteLine(fp, line_buffer);
if (strcmp(line_buffer, "0100") != 0)
FATAL_ERROR("Unsuported JASC-PAL version.\n");

ReadJascPaletteLine(fp, line);
// Get number of colors in palette
ReadJascPaletteLine(fp, line_buffer);
if (!ParseNumber(line_buffer, NULL, 10, &numColors))
GriffinRichards marked this conversation as resolved.
Show resolved Hide resolved
FATAL_ERROR("Failed to parse number of colours.\n");

if (!ParseNumber(line, NULL, 10, &palette->numColors))
FATAL_ERROR("Failed to parse number of colors.\n");

if (palette->numColors < 1 || palette->numColors > 256)
FATAL_ERROR("%d is an invalid number of colors. The number of colors must be in the range [1, 256].\n", palette->numColors);

for (int i = 0; i < palette->numColors; i++)
// Check for sensible number of colors
if (numColors > 0 && numColors <= 256)
{
ReadJascPaletteLine(fp, line);

char *s = line;
char *end;

int red;
int green;
int blue;

if (!ParseNumber(s, &end, 10, &red))
FATAL_ERROR("Failed to parse red color component.\n");

s = end;

if (*s != ' ')
FATAL_ERROR("Expected a space after red color component.\n");

s++;

if (*s < '0' || *s > '9')
FATAL_ERROR("Expected only a space between red and green color components.\n");

if (!ParseNumber(s, &end, 10, &green))
FATAL_ERROR("Failed to parse green color component.\n");

s = end;

if (*s != ' ')
FATAL_ERROR("Expected a space after green color component.\n");

s++;

if (*s < '0' || *s > '9')
FATAL_ERROR("Expected only a space between green and blue color components.\n");

if (!ParseNumber(s, &end, 10, &blue))
FATAL_ERROR("Failed to parse blue color component.\n");
palette->numColors = numColors;
} else {
FATAL_ERROR("%i is an invalid number of colours. The number of colours must be in the range [1, 256]\n", numColors);
}

if (*end != 0)
FATAL_ERROR("Garbage after blue color component.\n");
// Get color entries
for (int i = 0; i < numColors; ++i)
{
if (ReadJascPaletteLine(fp, line_buffer) == 0)
FATAL_ERROR("Failed to read color index %i\n", i);
if (sscanf(line_buffer, "%d %d %d", &red, &green, &blue) != 3)
FATAL_ERROR("Invalid color format in color \"%s\"\n", line_buffer);
waterwheels marked this conversation as resolved.
Show resolved Hide resolved

if (red < 0 || red > 255)
FATAL_ERROR("Red color component (%d) is outside the range [0, 255].\n", red);

FATAL_ERROR("Red color component %d is invalid. Accepted range is [0, 255]\n", red);
if (green < 0 || green > 255)
FATAL_ERROR("Green color component (%d) is outside the range [0, 255].\n", green);

FATAL_ERROR("Green color component %d is invalid. Accepted range is [0, 255]\n", green);
if (blue < 0 || blue > 255)
FATAL_ERROR("Blue color component (%d) is outside the range [0, 255].\n", blue);
FATAL_ERROR("Blue color component %d is invalid. Accepted range is [0, 255]\n", blue);

palette->colors[i].red = red;
palette->colors[i].green = green;
palette->colors[i].blue = blue;
}

if (fgetc(fp) != EOF)
FATAL_ERROR("Garbage after color data.\n");

fclose(fp);
}

Expand Down