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Gif: skip most of the known application extensions instead of ignoring them

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Except the plain text one
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Edoardo Lolletti 2025-08-19 20:07:04 +02:00 committed by GitHub
parent 3cf702f8f4
commit 58a2ac164f
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GPG Key ID: B5690EEEBB952194
1 changed files with 3 additions and 23 deletions
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26
arm9/src/gifConverter.cpp
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@ -92,12 +92,6 @@ Gif getGif(std::string_view path) {
switch (fgetc(file)) {
case 0x21: { // Extension
switch (fgetc(file)) {
case 0xF9: { // Graphics Control
uint8_t toRead = fgetc(file);
fseek(file, toRead, SEEK_CUR);
fgetc(file); // Terminator
break;
}
case 0x01: { // Plain text
throw std::runtime_error("Plain text found");
#if 0
@ -108,24 +102,10 @@ Gif getGif(std::string_view path) {
break;
#endif
}
case 0xFF: { // Application extension
throw std::runtime_error("Application extension found");
#if 0
if (fgetc(file) == 0xB) {
char buffer[0xC] = {0};
fread(buffer, 1, 0xB, file);
if (strcmp(buffer, "NETSCAPE2.0") == 0) { // Check for Netscape loop count
fseek(file, 2, SEEK_CUR);
fseek(file, 2, SEEK_CUR);
fgetc(file); //terminator
break;
}
}
[[fallthrough]];
#endif
}
case 0xF9: // Graphics Control
case 0xFF: // Application extension
case 0xFE: { // Comment
// Skip comments and unsupported application extionsions
// Skip
while (uint8_t size = fgetc(file)) {
fseek(file, size, SEEK_CUR);
}