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| author | Robbie Cooper <cooperra@users.noreply.github.com> | 2022-10-19 13:58:23 -0400 |
|---|---|---|
| committer | Robbie Cooper <cooperra@users.noreply.github.com> | 2022-10-19 22:30:08 -0400 |
| commit | f54c3d4287db46a55f91eb760df84ab016c26d67 (patch) | |
| tree | 5a92818c949f79a034141f317a2a183193374ef8 /modules/bmp | |
| parent | a8c805be2947b211ee8b881d7a8bab7cdc86e170 (diff) | |
Support 2 bits per pixel BMP images
Diffstat (limited to 'modules/bmp')
| -rw-r--r-- | modules/bmp/image_loader_bmp.cpp | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/modules/bmp/image_loader_bmp.cpp b/modules/bmp/image_loader_bmp.cpp index 681b3e74bc..42984138f0 100644 --- a/modules/bmp/image_loader_bmp.cpp +++ b/modules/bmp/image_loader_bmp.cpp @@ -58,6 +58,13 @@ Error ImageLoaderBMP::convert_to_image(Ref<Image> p_image, 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 == 2) { + // Requires bit unpacking... + ERR_FAIL_COND_V_MSG(width % 4 != 0, ERR_UNAVAILABLE, + vformat("2-bpp BMP images must have a width that is a multiple of 4, but the imported BMP is %d pixels wide.", int(width))); + ERR_FAIL_COND_V_MSG(height % 4 != 0, ERR_UNAVAILABLE, + vformat("2-bpp BMP images must have a height that is a multiple of 4, but the imported BMP is %d pixels tall.", int(height))); + } else if (bits_per_pixel == 4) { // Requires bit unpacking... ERR_FAIL_COND_V_MSG(width % 2 != 0, ERR_UNAVAILABLE, @@ -88,7 +95,7 @@ Error ImageLoaderBMP::convert_to_image(Ref<Image> p_image, const uint32_t line_width = (width_bytes + 3) & ~3; // The actual data traversal is determined by - // the data width in case of 8/4/1 bit images + // the data width in case of 8/4/2/1 bit images const uint32_t w = bits_per_pixel >= 24 ? width : width_bytes; const uint8_t *line = p_buffer + (line_width * (height - 1)); const uint8_t *end_buffer = p_buffer + p_header.bmp_file_header.bmp_file_size - p_header.bmp_file_header.bmp_file_offset; @@ -114,6 +121,17 @@ Error ImageLoaderBMP::convert_to_image(Ref<Image> p_image, index += 8; line_ptr += 1; } break; + case 2: { + uint8_t color_index = *line_ptr; + + write_buffer[index + 0] = (color_index >> 6) & 3; + write_buffer[index + 1] = (color_index >> 4) & 3; + write_buffer[index + 2] = (color_index >> 2) & 3; + write_buffer[index + 3] = color_index & 3; + + index += 4; + line_ptr += 1; + } break; case 4: { uint8_t color_index = *line_ptr; |