| 1 | /* Copyright (C) 2010-2020 The RetroArch team |
| 2 | * |
| 3 | * --------------------------------------------------------------------------------------- |
| 4 | * The following license statement only applies to this file (rbmp_encode.c). |
| 5 | * --------------------------------------------------------------------------------------- |
| 6 | * |
| 7 | * Permission is hereby granted, free of charge, |
| 8 | * to any person obtaining a copy of this software and associated documentation files (the "Software"), |
| 9 | * to deal in the Software without restriction, including without limitation the rights to |
| 10 | * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, |
| 11 | * and to permit persons to whom the Software is furnished to do so, subject to the following conditions: |
| 12 | * |
| 13 | * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. |
| 14 | * |
| 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, |
| 16 | * INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. |
| 18 | * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, |
| 19 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| 21 | */ |
| 22 | |
| 23 | #include <stdlib.h> |
| 24 | #include <string.h> |
| 25 | |
| 26 | #include <streams/file_stream.h> |
| 27 | #include <formats/rbmp.h> |
| 28 | |
| 29 | void form_bmp_header(uint8_t *header, |
| 30 | unsigned width, unsigned height, |
| 31 | bool is32bpp) |
| 32 | { |
| 33 | unsigned line_size = (width * (is32bpp?4:3) + 3) & ~3; |
| 34 | unsigned size = line_size * height + 54; |
| 35 | unsigned size_array = line_size * height; |
| 36 | |
| 37 | /* Generic BMP stuff. */ |
| 38 | /* signature */ |
| 39 | header[0] = 'B'; |
| 40 | header[1] = 'M'; |
| 41 | /* file size */ |
| 42 | header[2] = (uint8_t)(size >> 0); |
| 43 | header[3] = (uint8_t)(size >> 8); |
| 44 | header[4] = (uint8_t)(size >> 16); |
| 45 | header[5] = (uint8_t)(size >> 24); |
| 46 | /* reserved */ |
| 47 | header[6] = 0; |
| 48 | header[7] = 0; |
| 49 | header[8] = 0; |
| 50 | header[9] = 0; |
| 51 | /* offset */ |
| 52 | header[10] = 54; |
| 53 | header[11] = 0; |
| 54 | header[12] = 0; |
| 55 | header[13] = 0; |
| 56 | /* DIB size */ |
| 57 | header[14] = 40; |
| 58 | header[15] = 0; |
| 59 | header[16] = 0; |
| 60 | header[17] = 0; |
| 61 | /* Width */ |
| 62 | header[18] = (uint8_t)(width >> 0); |
| 63 | header[19] = (uint8_t)(width >> 8); |
| 64 | header[20] = (uint8_t)(width >> 16); |
| 65 | header[21] = (uint8_t)(width >> 24); |
| 66 | /* Height */ |
| 67 | header[22] = (uint8_t)(height >> 0); |
| 68 | header[23] = (uint8_t)(height >> 8); |
| 69 | header[24] = (uint8_t)(height >> 16); |
| 70 | header[25] = (uint8_t)(height >> 24); |
| 71 | /* Color planes */ |
| 72 | header[26] = 1; |
| 73 | header[27] = 0; |
| 74 | /* Bits per pixel */ |
| 75 | header[28] = is32bpp ? 32 : 24; |
| 76 | header[29] = 0; |
| 77 | /* Compression method */ |
| 78 | header[30] = 0; |
| 79 | header[31] = 0; |
| 80 | header[32] = 0; |
| 81 | header[33] = 0; |
| 82 | /* Image data size */ |
| 83 | header[34] = (uint8_t)(size_array >> 0); |
| 84 | header[35] = (uint8_t)(size_array >> 8); |
| 85 | header[36] = (uint8_t)(size_array >> 16); |
| 86 | header[37] = (uint8_t)(size_array >> 24); |
| 87 | /* Horizontal resolution */ |
| 88 | header[38] = 19; |
| 89 | header[39] = 11; |
| 90 | header[40] = 0; |
| 91 | header[41] = 0; |
| 92 | /* Vertical resolution */ |
| 93 | header[42] = 19; |
| 94 | header[43] = 11; |
| 95 | header[44] = 0; |
| 96 | header[45] = 0; |
| 97 | /* Palette size */ |
| 98 | header[46] = 0; |
| 99 | header[47] = 0; |
| 100 | header[48] = 0; |
| 101 | header[49] = 0; |
| 102 | /* Important color count */ |
| 103 | header[50] = 0; |
| 104 | header[51] = 0; |
| 105 | header[52] = 0; |
| 106 | header[53] = 0; |
| 107 | } |
| 108 | |
| 109 | static bool write_header_bmp(RFILE *file, unsigned width, unsigned height, bool is32bpp) |
| 110 | { |
| 111 | uint8_t header[54]; |
| 112 | form_bmp_header(header, width, height, is32bpp); |
| 113 | return filestream_write(file, header, sizeof(header)) == sizeof(header); |
| 114 | } |
| 115 | |
| 116 | static void dump_line_565_to_24(uint8_t *line, const uint16_t *src, unsigned width) |
| 117 | { |
| 118 | unsigned i; |
| 119 | |
| 120 | for (i = 0; i < width; i++) |
| 121 | { |
| 122 | uint16_t pixel = *src++; |
| 123 | uint8_t b = (pixel >> 0) & 0x1f; |
| 124 | uint8_t g = (pixel >> 5) & 0x3f; |
| 125 | uint8_t r = (pixel >> 11) & 0x1f; |
| 126 | *line++ = (b << 3) | (b >> 2); |
| 127 | *line++ = (g << 2) | (g >> 4); |
| 128 | *line++ = (r << 3) | (r >> 2); |
| 129 | } |
| 130 | } |
| 131 | |
| 132 | static void dump_line_32_to_24(uint8_t *line, const uint32_t *src, unsigned width) |
| 133 | { |
| 134 | unsigned i; |
| 135 | |
| 136 | for (i = 0; i < width; i++) |
| 137 | { |
| 138 | uint32_t pixel = *src++; |
| 139 | *line++ = (pixel >> 0) & 0xff; |
| 140 | *line++ = (pixel >> 8) & 0xff; |
| 141 | *line++ = (pixel >> 16) & 0xff; |
| 142 | } |
| 143 | } |
| 144 | |
| 145 | static void dump_content(RFILE *file, const void *frame, |
| 146 | int width, int height, int pitch, enum rbmp_source_type type) |
| 147 | { |
| 148 | int j; |
| 149 | size_t line_size; |
| 150 | uint8_t *line = NULL; |
| 151 | int bytes_per_pixel = (type==RBMP_SOURCE_TYPE_ARGB8888?4:3); |
| 152 | union |
| 153 | { |
| 154 | const uint8_t *u8; |
| 155 | const uint16_t *u16; |
| 156 | const uint32_t *u32; |
| 157 | } u; |
| 158 | |
| 159 | u.u8 = (const uint8_t*)frame; |
| 160 | line_size = (width * bytes_per_pixel + 3) & ~3; |
| 161 | |
| 162 | switch (type) |
| 163 | { |
| 164 | case RBMP_SOURCE_TYPE_BGR24: |
| 165 | { |
| 166 | /* BGR24 byte order input matches output. Can directly copy, but... need to make sure we pad it. */ |
| 167 | uint32_t zeros = 0; |
| 168 | int padding = (int)(line_size-pitch); |
| 169 | for (j = 0; j < height; j++, u.u8 += pitch) |
| 170 | { |
| 171 | filestream_write(file, u.u8, pitch); |
| 172 | if (padding != 0) |
| 173 | filestream_write(file, &zeros, padding); |
| 174 | } |
| 175 | } |
| 176 | break; |
| 177 | case RBMP_SOURCE_TYPE_ARGB8888: |
| 178 | /* ARGB8888 byte order input matches output. Can directly copy. */ |
| 179 | for (j = 0; j < height; j++, u.u8 += pitch) |
| 180 | filestream_write(file, u.u8, line_size); |
| 181 | return; |
| 182 | default: |
| 183 | break; |
| 184 | } |
| 185 | |
| 186 | /* allocate line buffer, and initialize the final four bytes to zero, for deterministic padding */ |
| 187 | if (!(line = (uint8_t*)malloc(line_size))) |
| 188 | return; |
| 189 | *(uint32_t*)(line + line_size - 4) = 0; |
| 190 | |
| 191 | switch (type) |
| 192 | { |
| 193 | case RBMP_SOURCE_TYPE_XRGB888: |
| 194 | for (j = 0; j < height; j++, u.u8 += pitch) |
| 195 | { |
| 196 | dump_line_32_to_24(line, u.u32, width); |
| 197 | filestream_write(file, line, line_size); |
| 198 | } |
| 199 | break; |
| 200 | case RBMP_SOURCE_TYPE_RGB565: |
| 201 | for (j = 0; j < height; j++, u.u8 += pitch) |
| 202 | { |
| 203 | dump_line_565_to_24(line, u.u16, width); |
| 204 | filestream_write(file, line, line_size); |
| 205 | } |
| 206 | break; |
| 207 | default: |
| 208 | break; |
| 209 | } |
| 210 | |
| 211 | /* Free allocated line buffer */ |
| 212 | free(line); |
| 213 | } |
| 214 | |
| 215 | bool rbmp_save_image( |
| 216 | const char *filename, |
| 217 | const void *frame, |
| 218 | unsigned width, unsigned height, |
| 219 | unsigned pitch, enum rbmp_source_type type) |
| 220 | { |
| 221 | bool ret = false; |
| 222 | RFILE *file = filestream_open(filename, |
| 223 | RETRO_VFS_FILE_ACCESS_WRITE, |
| 224 | RETRO_VFS_FILE_ACCESS_HINT_NONE); |
| 225 | if (!file) |
| 226 | return false; |
| 227 | |
| 228 | ret = write_header_bmp(file, width, height, type==RBMP_SOURCE_TYPE_ARGB8888); |
| 229 | |
| 230 | if (ret) |
| 231 | dump_content(file, frame, width, height, pitch, type); |
| 232 | |
| 233 | filestream_close(file); |
| 234 | |
| 235 | return ret; |
| 236 | } |