red031000/nitrogfx
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Fix NCER LABL block parsing

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This commit is contained in:
PikalaxALT 2024-08-02 18:56:53 -04:00
parent 616bfba6f5
commit 24188ee122
2 changed files with 86 additions and 47 deletions
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4
Makefile
View File

@ -6,7 +6,7 @@ ifeq ($(HAVE_LIBPNG),1)
$(error No package 'libpng' found)
endif
CFLAGS = -Wall -Wextra -Werror -Wno-sign-compare -std=c11 -O2 -DPNG_SKIP_SETJMP_CHECK $(shell pkg-config --cflags libpng zlib)
CFLAGS = -Wall -Wextra -Werror -Wno-sign-compare -std=c11 -DPNG_SKIP_SETJMP_CHECK $(shell pkg-config --cflags libpng zlib)
LIBS = $(shell pkg-config --libs libpng zlib)
@ -22,7 +22,7 @@ nitrogfx-debug: $(SRCS) convert_png.h gfx.h global.h jasc_pal.h lz.h rl.h util.h
$(CC) $(CFLAGS) -g -DDEBUG $(SRCS) -o $@ $(LDFLAGS) $(LIBS)
nitrogfx: $(SRCS) convert_png.h gfx.h global.h jasc_pal.h lz.h rl.h util.h font.h json.h cJSON.h
$(CC) $(CFLAGS) $(SRCS) -o $@ $(LDFLAGS) $(LIBS)
$(CC) $(CFLAGS) -O2 $(SRCS) -o $@ $(LDFLAGS) $(LIBS)
clean:
$(RM) -r nitrogfx nitrogfx.exe $(OBJS)

129
gfx.c
View File

@ -9,6 +9,26 @@
#include "gfx.h"
#include "util.h"
static unsigned int FindNitroDataBlock(const unsigned char *data, const char *ident, unsigned int fileSize, unsigned int *blockSize_out)
{
unsigned int offset = 0x10;
while (offset < fileSize)
{
unsigned int blockSize = data[offset + 4] | (data[offset + 5] << 8) | (data[offset + 6] << 16) | (data[offset + 7] << 24);
if (offset + blockSize > fileSize)
{
FATAL_ERROR("corrupted NTR file");
}
if (memcmp(data + offset, ident, 4) == 0)
{
*blockSize_out = blockSize;
return offset;
}
offset += blockSize;
}
return -1u;
}
#define GET_GBA_PAL_RED(x) (((x) >> 0) & 0x1F)
#define GET_GBA_PAL_GREEN(x) (((x) >> 5) & 0x1F)
#define GET_GBA_PAL_BLUE(x) (((x) >> 10) & 0x1F)
@ -888,38 +908,27 @@ void WriteNtrPalette(char *path, struct Palette *palette, bool ncpr, bool ir, in
fclose(fp);
}
void ReadNtrCell(char *path, struct JsonToCellOptions *options)
void ReadNtrCell_CEBK(unsigned char * restrict data, unsigned int blockOffset, unsigned int blockSize, struct JsonToCellOptions *options)
{
int fileSize;
unsigned char *data = ReadWholeFile(path, &fileSize);
if (memcmp(data, "RECN", 4) != 0) //NCER
{
FATAL_ERROR("Not a valid NCER cell file.\n");
}
options->labelEnabled = data[0xE] != 1;
if (memcmp(data + 0x10, "KBEC", 4) != 0 ) //KBEC
{
FATAL_ERROR("Not a valid KBEC cell file.\n");
}
options->cellCount = data[0x18] | (data[0x19] << 8);
options->extended = data[0x1A] == 1;
options->cellCount = data[blockOffset + 0x8] | (data[blockOffset + 0x9] << 8);
options->extended = data[blockOffset + 0xA] == 1;
/*if (!options->extended)
{
//in theory not extended should be implemented, however not 100% sure
FATAL_ERROR("Don't know how to deal with not extended yet, bug red031000.\n");
}*/
options->mappingType = data[0x20];
options->mappingType = data[blockOffset + 0x10];
options->cells = malloc(sizeof(struct Cell *) * options->cellCount);
int celSize = options->extended ? 0x10 : 0x8;
for (int i = 0; i < options->cellCount; i++)
{
int offset = 0x30 + (i * (options->extended ? 0x10 : 0x8));
int offset = blockOffset + 0x20 + (i * celSize);
if (offset + celSize > blockSize) {
FATAL_ERROR("corrupted CEBK block");
}
options->cells[i] = malloc(sizeof(struct Cell));
options->cells[i]->oamCount = data[offset] | (data[offset + 1] << 8);
short cellAttrs = data[offset + 2] | (data[offset + 3] << 8);
@ -938,7 +947,7 @@ void ReadNtrCell(char *path, struct JsonToCellOptions *options)
}
}
int offset = 0x30 + (options->cellCount * (options->extended ? 0x10 : 0x8));
int offset = blockOffset + 0x20 + (options->cellCount * celSize);
for (int i = 0; i < options->cellCount; i++)
{
options->cells[i]->oam = malloc(sizeof(struct OAM) * options->cells[i]->oamCount);
@ -993,35 +1002,65 @@ void ReadNtrCell(char *path, struct JsonToCellOptions *options)
}
}
if (options->labelEnabled)
}
void ReadNtrCell_LABL(unsigned char * restrict data, unsigned int blockOffset, unsigned int blockSize, struct JsonToCellOptions *options)
{
int count = 0;
unsigned int textStart = blockOffset + 8;
while (textStart < blockOffset + blockSize)
{
int count = 0;
int offset = 0x30 + (options->cellCount * 0x16) + 0x8;
bool flag = false;
//this entire thing is a huge assumption, it will not work with labels that are less than 2 characters long
while (!flag)
unsigned int labelOffset = data[textStart] | (data[textStart + 1] << 8) | (data[textStart + 2] << 16) | (data[textStart + 3] << 24);
if (labelOffset > blockSize)
{
if (strlen((char *) data + offset) < 2)
{
//probably a pointer, maybe?
count++;
offset += 4;
}
else
{
//huzzah a string
flag = true;
}
break;
}
options->labelCount = count;
options->labels = malloc(sizeof(char *) * count);
for (int i = 0; i < count; i++)
else {
++count;
textStart += 4;
}
}
options->labelCount = count;
options->labels = malloc(sizeof(char *) * count);
for (int i = 0; i < count; ++i)
{
int offset = textStart + (data[blockOffset + 4 * i + 8] | (data[blockOffset + 4 * i + 9] << 8) | (data[blockOffset + 4 * i + 10] << 16) | (data[blockOffset + 4 * i + 11] << 24));
if (offset > blockOffset + blockSize)
{
options->labels[i] = malloc(strlen((char *) data + offset) + 1);
strcpy(options->labels[i], (char *) data + offset);
offset += strlen(options->labels[i]) + 1;
FATAL_ERROR("corrupted LABL block");
}
//after this should be txeu, if everything was done right
unsigned long slen = strnlen((char *)data + offset, blockSize - offset);
options->labels[i] = malloc(slen + 1);
strncpy(options->labels[i], (char *)data + offset, slen + 1);
}
}
void ReadNtrCell(char *path, struct JsonToCellOptions *options)
{
int fileSize;
unsigned char *data = ReadWholeFile(path, &fileSize);
unsigned int offset = 0x10;
if (memcmp(data, "RECN", 4) != 0) //NCER
{
FATAL_ERROR("Not a valid NCER cell file.\n");
}
options->labelEnabled = data[0xE] != 1;
unsigned int blockSize;
offset = FindNitroDataBlock(data, "KBEC", fileSize, &blockSize);
if (offset != -1u)
{
ReadNtrCell_CEBK(data, offset, blockSize, options);
}
else {
FATAL_ERROR("missing CEBK block");
}
offset = FindNitroDataBlock(data, "LBAL", fileSize, &blockSize);
if (offset != -1u)
{
ReadNtrCell_LABL(data, offset, blockSize, options);
}
free(data);