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/*************************************************************************/
/* image_loader_bmp.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "image_loader_bmp.h"
Error ImageLoaderBMP::convert_to_image(Ref<Image> p_image,
const uint8_t *p_buffer,
const uint8_t *p_color_buffer,
const bmp_header_s &p_header) {
Error err = OK;
if (p_buffer == NULL)
err = FAILED;
if (err == OK) {
size_t index = 0;
size_t width = (size_t)p_header.bmp_info_header.bmp_width;
size_t height = (size_t)p_header.bmp_info_header.bmp_height;
size_t bits_per_pixel = (size_t)p_header.bmp_info_header.bmp_bit_count;
if (p_header.bmp_info_header.bmp_compression != BI_RGB) {
err = FAILED;
}
if (!(bits_per_pixel == 8 || bits_per_pixel == 24 || bits_per_pixel == 32)) {
err = FAILED;
}
if (err == OK) {
uint32_t line_width = ((p_header.bmp_info_header.bmp_width *
p_header.bmp_info_header.bmp_bit_count / 8) +
3) &
~3;
PoolVector<uint8_t> image_data;
err = image_data.resize(width * height * 4);
PoolVector<uint8_t>::Write image_data_w = image_data.write();
uint8_t *write_buffer = image_data_w.ptr();
const uint32_t color_index_max = p_header.bmp_info_header.bmp_colors_used - 1;
const uint8_t *line = p_buffer + (line_width * (height - 1));
for (unsigned int i = 0; i < height; i++) {
const uint8_t *line_ptr = line;
for (unsigned int j = 0; j < width; j++) {
switch (bits_per_pixel) {
case 8: {
uint8_t color_index = CLAMP(*line_ptr, 0, color_index_max);
uint32_t color = 0x000000;
if (p_color_buffer != NULL)
color = ((uint32_t *)p_color_buffer)[color_index];
write_buffer[index + 2] = color & 0xff;
write_buffer[index + 1] = (color >> 8) & 0xff;
write_buffer[index + 0] = (color >> 16) & 0xff;
write_buffer[index + 3] = 0xff;
index += 4;
line_ptr += 1;
} break;
case 24: {
uint32_t color = *((uint32_t *)line_ptr);
write_buffer[index + 2] = color & 0xff;
write_buffer[index + 1] = (color >> 8) & 0xff;
write_buffer[index + 0] = (color >> 16) & 0xff;
write_buffer[index + 3] = 0xff;
index += 4;
line_ptr += 3;
} break;
case 32: {
uint32_t color = *((uint32_t *)line_ptr);
write_buffer[index + 2] = color & 0xff;
write_buffer[index + 1] = (color >> 8) & 0xff;
write_buffer[index + 0] = (color >> 16) & 0xff;
write_buffer[index + 3] = color >> 24;
index += 4;
line_ptr += 4;
} break;
}
}
line -= line_width;
}
p_image->create(width, height, 0, Image::FORMAT_RGBA8, image_data);
}
}
return err;
}
Error ImageLoaderBMP::load_image(Ref<Image> p_image, FileAccess *f,
bool p_force_linear, float p_scale) {
bmp_header_s bmp_header;
Error err = ERR_INVALID_DATA;
static const size_t FILE_HEADER_SIZE = 14;
static const size_t INFO_HEADER_SIZE = 40;
// A valid bmp file should always at least have a
// file header and a minimal info header
if (f->get_len() > FILE_HEADER_SIZE + INFO_HEADER_SIZE) {
// File Header
bmp_header.bmp_file_header.bmp_signature = f->get_16();
if (bmp_header.bmp_file_header.bmp_signature == BITMAP_SIGNATURE) {
bmp_header.bmp_file_header.bmp_file_size = f->get_32();
bmp_header.bmp_file_header.bmp_file_padding = f->get_32();
bmp_header.bmp_file_header.bmp_file_offset = f->get_32();
// Info Header
bmp_header.bmp_info_header.bmp_header_size = f->get_32();
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();
bmp_header.bmp_info_header.bmp_bit_count = f->get_16();
bmp_header.bmp_info_header.bmp_compression = f->get_32();
bmp_header.bmp_info_header.bmp_size_image = f->get_32();
bmp_header.bmp_info_header.bmp_pixels_per_meter_x = f->get_32();
bmp_header.bmp_info_header.bmp_pixels_per_meter_y = f->get_32();
bmp_header.bmp_info_header.bmp_colors_used = f->get_32();
bmp_header.bmp_info_header.bmp_important_colors = f->get_32();
// Compressed bitmaps not supported, stop parsing
if (bmp_header.bmp_info_header.bmp_compression != BI_RGB) {
ERR_EXPLAIN("Unsupported bmp file: " + f->get_path());
f->close();
ERR_FAIL_V(err)
}
f->seek(FILE_HEADER_SIZE +
bmp_header.bmp_info_header.bmp_header_size);
if (bmp_header.bmp_info_header.bmp_bit_count < 16 && bmp_header.bmp_info_header.bmp_colors_used == 0)
bmp_header.bmp_info_header.bmp_colors_used = 1 << bmp_header.bmp_info_header.bmp_bit_count;
// Color table is usually 4 bytes per color -> [B][G][R][0]
uint32_t color_table_size = bmp_header.bmp_info_header.bmp_colors_used * 4;
PoolVector<uint8_t> bmp_color_table;
if (color_table_size > 0) {
err = bmp_color_table.resize(color_table_size);
PoolVector<uint8_t>::Write bmp_color_table_w = bmp_color_table.write();
f->get_buffer(bmp_color_table_w.ptr(), color_table_size);
}
f->seek(bmp_header.bmp_file_header.bmp_file_offset);
uint32_t bmp_buffer_size = (bmp_header.bmp_file_header.bmp_file_size -
bmp_header.bmp_file_header.bmp_file_offset);
PoolVector<uint8_t> bmp_buffer;
err = bmp_buffer.resize(bmp_buffer_size);
if (err == OK) {
PoolVector<uint8_t>::Write bmp_buffer_w = bmp_buffer.write();
f->get_buffer(bmp_buffer_w.ptr(), bmp_buffer_size);
PoolVector<uint8_t>::Read bmp_buffer_r = bmp_buffer.read();
PoolVector<uint8_t>::Read bmp_color_table_r = bmp_color_table.read();
err = convert_to_image(p_image, bmp_buffer_r.ptr(),
bmp_color_table_r.ptr(), bmp_header);
}
f->close();
}
}
return err;
}
void ImageLoaderBMP::get_recognized_extensions(
List<String> *p_extensions) const {
p_extensions->push_back("bmp");
}
ImageLoaderBMP::ImageLoaderBMP() {}
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