mirror of
https://github.com/godotengine/godot
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e74a0eff16
This commit adds some basic 16bpp support for BMP File Format. Added support for reading and using of 16 bit mask values from file. All values are scaled to ARGB255 format based on bit depth of source color channel. Removed warning, it's no longer required as 16 bit with alpha bit(s) are now supported. Adjusted spacing, added spacing and brackets to make clang static check happy.
111 lines
4.6 KiB
C++
111 lines
4.6 KiB
C++
/**************************************************************************/
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/* image_loader_bmp.h */
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/**************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/**************************************************************************/
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/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
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/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a copy of this software and associated documentation files (the */
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/* "Software"), to deal in the Software without restriction, including */
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/* without limitation the rights to use, copy, modify, merge, publish, */
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/* distribute, sublicense, and/or sell copies of the Software, and to */
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/* permit persons to whom the Software is furnished to do so, subject to */
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/* the following conditions: */
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/* */
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/* The above copyright notice and this permission notice shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
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/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
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/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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/**************************************************************************/
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#ifndef IMAGE_LOADER_BMP_H
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#define IMAGE_LOADER_BMP_H
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#include "core/io/image_loader.h"
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class ImageLoaderBMP : public ImageFormatLoader {
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protected:
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static const unsigned BITMAP_SIGNATURE = 0x4d42;
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static const unsigned BITMAP_FILE_HEADER_SIZE = 14; // bmp_file_header_s
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static const unsigned BITMAP_INFO_HEADER_MIN_SIZE = 40; // bmp_info_header_s
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enum bmp_compression_s {
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BI_RGB = 0x00,
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BI_RLE8 = 0x01, // compressed
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BI_RLE4 = 0x02, // compressed
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BI_BITFIELDS = 0x03,
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BI_JPEG = 0x04,
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BI_PNG = 0x05,
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BI_ALPHABITFIELDS = 0x06,
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BI_CMYK = 0x0b,
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BI_CMYKRLE8 = 0x0c, // compressed
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BI_CMYKRLE4 = 0x0d // compressed
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};
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struct bmp_header_s {
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struct bmp_file_header_s {
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uint16_t bmp_signature = 0;
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uint32_t bmp_file_size = 0;
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uint32_t bmp_file_padding = 0;
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uint32_t bmp_file_offset = 0;
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} bmp_file_header;
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struct bmp_info_header_s {
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uint32_t bmp_header_size = 0;
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uint32_t bmp_width = 0;
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uint32_t bmp_height = 0;
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uint16_t bmp_planes = 0;
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uint16_t bmp_bit_count = 0;
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uint32_t bmp_compression = 0;
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uint32_t bmp_size_image = 0;
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uint32_t bmp_pixels_per_meter_x = 0;
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uint32_t bmp_pixels_per_meter_y = 0;
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uint32_t bmp_colors_used = 0;
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uint32_t bmp_important_colors = 0;
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} bmp_info_header;
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struct bmp_bitfield_s {
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uint16_t alpha_mask = 0x8000;
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uint16_t red_mask = 0x7C00;
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uint16_t green_mask = 0x03E0;
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uint16_t blue_mask = 0x001F;
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uint16_t alpha_mask_width = 1u;
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uint16_t red_mask_width = 5u;
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uint16_t green_mask_width = 5u;
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uint16_t blue_mask_width = 5u;
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uint8_t alpha_offset = 15u; // Used for bit shifting.
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uint8_t red_offset = 10u; // Used for bit shifting.
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uint8_t green_offset = 5u; // Used for bit shifting.
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//uint8_t blue_offset = 0u; // Always LSB aligned no shifting needed.
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//uint8_t alpha_max = 1u; // Always boolean or on, so no scaling needed.
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uint8_t red_max = 32u; // Used for color space scaling.
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uint8_t green_max = 32u; // Used for color space scaling.
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uint8_t blue_max = 32u; // Used for color space scaling.
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} bmp_bitfield;
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};
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static Error convert_to_image(Ref<Image> p_image,
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const uint8_t *p_buffer,
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const uint8_t *p_color_buffer,
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const uint32_t color_table_size,
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const bmp_header_s &p_header);
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public:
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virtual Error load_image(Ref<Image> p_image, Ref<FileAccess> f, BitField<ImageFormatLoader::LoaderFlags> p_flags, float p_scale);
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virtual void get_recognized_extensions(List<String> *p_extensions) const;
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ImageLoaderBMP();
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};
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#endif // IMAGE_LOADER_BMP_H
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