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Add more error explanations in the BMP image loader

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This closes #32166 and closes #30629.
This commit is contained in:
Hugo Locurcio 2020-08-18 16:47:07 +02:00
parent ba1109a3b3
commit 40485e2479
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GPG key ID: 39E8F8BE30B0A49C
1 changed files with 19 additions and 12 deletions
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31
modules/bmp/image_loader_bmp.cpp
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@ -51,16 +51,20 @@ Error ImageLoaderBMP::convert_to_image(Ref<Image> p_image,
if (bits_per_pixel == 1) {
// Requires bit unpacking...
ERR_FAIL_COND_V(width % 8 != 0, ERR_UNAVAILABLE);
ERR_FAIL_COND_V(height % 8 != 0, ERR_UNAVAILABLE);
ERR_FAIL_COND_V_MSG(width % 8 != 0, ERR_UNAVAILABLE,
vformat("1-bpp BMP images must have a width that is a multiple of 8, but the imported BMP is %d pixels wide.", int(width)));
ERR_FAIL_COND_V_MSG(height % 8 != 0, ERR_UNAVAILABLE,
vformat("1-bpp BMP images must have a height that is a multiple of 8, but the imported BMP is %d pixels tall.", int(height)));
} else if (bits_per_pixel == 4) {
// Requires bit unpacking...
ERR_FAIL_COND_V(width % 2 != 0, ERR_UNAVAILABLE);
ERR_FAIL_COND_V(height % 2 != 0, ERR_UNAVAILABLE);
ERR_FAIL_COND_V_MSG(width % 2 != 0, ERR_UNAVAILABLE,
vformat("4-bpp BMP images must have a width that is a multiple of 2, but the imported BMP is %d pixels wide.", int(width)));
ERR_FAIL_COND_V_MSG(height % 2 != 0, ERR_UNAVAILABLE,
vformat("4-bpp BMP images must have a height that is a multiple of 2, but the imported BMP is %d pixels tall.", int(height)));
} else if (bits_per_pixel == 16) {
ERR_FAIL_V(ERR_UNAVAILABLE);
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "16-bpp BMP images are not supported.");
}
// Image data (might be indexed)
@ -72,7 +76,7 @@ Error ImageLoaderBMP::convert_to_image(Ref<Image> p_image,
} else { // color
data_len = width * height * 4;
}
ERR_FAIL_COND_V(data_len == 0, ERR_BUG);
ERR_FAIL_COND_V_MSG(data_len == 0, ERR_BUG, "Couldn't parse the BMP image data.");
err = data.resize(data_len);
uint8_t *data_w = data.ptrw();
@ -215,13 +219,15 @@ Error ImageLoaderBMP::load_image(Ref<Image> p_image, FileAccess *f,
// Info Header
bmp_header.bmp_info_header.bmp_header_size = f->get_32();
ERR_FAIL_COND_V(bmp_header.bmp_info_header.bmp_header_size < BITMAP_INFO_HEADER_MIN_SIZE, ERR_FILE_CORRUPT);
ERR_FAIL_COND_V_MSG(bmp_header.bmp_info_header.bmp_header_size < BITMAP_INFO_HEADER_MIN_SIZE, ERR_FILE_CORRUPT,
vformat("Couldn't parse the BMP info header. The file is likely corrupt: %s", f->get_path()));
bmp_header.bmp_info_header.bmp_width = f->get_32();
bmp_header.bmp_info_header.bmp_height = f->get_32();
bmp_header.bmp_info_header.bmp_planes = f->get_16();
ERR_FAIL_COND_V(bmp_header.bmp_info_header.bmp_planes != 1, ERR_FILE_CORRUPT);
ERR_FAIL_COND_V_MSG(bmp_header.bmp_info_header.bmp_planes != 1, ERR_FILE_CORRUPT,
vformat("Couldn't parse the BMP planes. The file is likely corrupt: %s", f->get_path()));
bmp_header.bmp_info_header.bmp_bit_count = f->get_16();
bmp_header.bmp_info_header.bmp_compression = f->get_32();
@ -236,10 +242,10 @@ Error ImageLoaderBMP::load_image(Ref<Image> p_image, FileAccess *f,
case BI_RLE4:
case BI_CMYKRLE8:
case BI_CMYKRLE4: {
// Stop parsing
String bmp_path = f->get_path();
// Stop parsing.
f->close();
ERR_FAIL_V_MSG(ERR_UNAVAILABLE, "Compressed BMP files are not supported: " + bmp_path + ".");
ERR_FAIL_V_MSG(ERR_UNAVAILABLE,
vformat("Compressed BMP files are not supported: %s", f->get_path()));
} break;
}
// Don't rely on sizeof(bmp_file_header) as structure padding
@ -255,7 +261,8 @@ Error ImageLoaderBMP::load_image(Ref<Image> p_image, FileAccess *f,
if (bmp_header.bmp_info_header.bmp_bit_count <= 8) {
// Support 256 colors max
color_table_size = 1 << bmp_header.bmp_info_header.bmp_bit_count;
ERR_FAIL_COND_V(color_table_size == 0, ERR_BUG);
ERR_FAIL_COND_V_MSG(color_table_size == 0, ERR_BUG,
vformat("Couldn't parse the BMP color table: %s", f->get_path()));
}
Vector<uint8_t> bmp_color_table;