/src/FreeImage/Source/FreeImage/PluginKOALA.cpp
C++ | 243 lines | 150 code | 51 blank | 42 comment | 12 complexity | f4a026477e927e3534250510fbbfae4b MD5 | raw file
1// ========================================================== 2// KOALA Loader 3// 4// Design and implementation by 5// - Floris van den Berg (flvdberg@wxs.nl) 6// 7// This file is part of FreeImage 3 8// 9// COVERED CODE IS PROVIDED UNDER THIS LICENSE ON AN "AS IS" BASIS, WITHOUT WARRANTY 10// OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, WITHOUT LIMITATION, WARRANTIES 11// THAT THE COVERED CODE IS FREE OF DEFECTS, MERCHANTABLE, FIT FOR A PARTICULAR PURPOSE 12// OR NON-INFRINGING. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE COVERED 13// CODE IS WITH YOU. SHOULD ANY COVERED CODE PROVE DEFECTIVE IN ANY RESPECT, YOU (NOT 14// THE INITIAL DEVELOPER OR ANY OTHER CONTRIBUTOR) ASSUME THE COST OF ANY NECESSARY 15// SERVICING, REPAIR OR CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL 16// PART OF THIS LICENSE. NO USE OF ANY COVERED CODE IS AUTHORIZED HEREUNDER EXCEPT UNDER 17// THIS DISCLAIMER. 18// 19// Use at your own risk! 20// ========================================================== 21 22#include "FreeImage.h" 23#include "Utilities.h" 24 25// ---------------------------------------------------------- 26// Constants + headers 27// ---------------------------------------------------------- 28 29#ifdef _WIN32 30#pragma pack(push, 1) 31#else 32#pragma pack(1) 33#endif 34 35typedef struct tagKOALA { 36 BYTE image[8000]; // pixmap image 37 BYTE colour1[1000]; // first colourmap (colour 1 and 2) 38 BYTE colour2[1000]; // second colourmap (colour 3) 39 BYTE background; // background colour 40} koala_t; 41 42struct colour_t { 43 int r; 44 int g; 45 int b; 46}; 47 48#ifdef _WIN32 49#pragma pack(pop) 50#else 51#pragma pack() 52#endif 53 54// ---------------------------------------------------------- 55 56#define CBM_WIDTH 320 57#define CBM_HEIGHT 200 58 59// ---------------------------------------------------------- 60 61const colour_t c64colours[16] = { 62 { 0, 0, 0 }, // Black 63 { 255, 255, 255 }, // White 64 { 170, 17, 17 }, // Red 65 { 12, 204, 204 }, // Cyan 66 { 221, 51, 221 }, // Purple 67 { 0, 187, 0 }, // Green 68 { 0, 0, 204 }, // Blue 69 { 255, 255, 140 }, // Yellow 70 { 204, 119, 34 }, // Orange 71 { 136, 68, 0 }, // Brown 72 { 255, 153, 136 }, // Light red 73 { 92, 92, 92 }, // Gray 1 74 { 170, 170, 170 }, // Gray 2 75 { 140, 255, 178 }, // Light green 76 { 39, 148, 255 }, // Light blue 77 { 196, 196, 196 } // Gray 3 78}; 79 80// ========================================================== 81// Plugin Interface 82// ========================================================== 83 84static int s_format_id; 85 86// ========================================================== 87// Plugin Implementation 88// ========================================================== 89 90const char * DLL_CALLCONV 91Format() { 92 return "KOALA"; 93} 94 95const char * DLL_CALLCONV 96Description() { 97 return "C64 Koala Graphics"; 98} 99 100const char * DLL_CALLCONV 101Extension() { 102 return "koa"; 103} 104 105const char * DLL_CALLCONV 106RegExpr() { 107 return NULL; 108} 109 110static const char * DLL_CALLCONV 111MimeType() { 112 return "image/x-koala"; 113} 114 115static BOOL DLL_CALLCONV 116Validate(FreeImageIO *io, fi_handle handle) { 117 BYTE koala_signature[] = { 0x00, 0x60 }; 118 BYTE signature[2] = { 0, 0 }; 119 120 io->read_proc(signature, 1, sizeof(koala_signature), handle); 121 122 return (memcmp(koala_signature, signature, sizeof(koala_signature)) == 0); 123} 124 125static BOOL DLL_CALLCONV 126SupportsExportDepth(int depth) { 127 return FALSE; 128} 129 130static BOOL DLL_CALLCONV 131SupportsExportType(FREE_IMAGE_TYPE type) { 132 return FALSE; 133} 134 135// ---------------------------------------------------------- 136 137FIBITMAP * DLL_CALLCONV 138Load(FreeImageIO *io, fi_handle handle, int page, int flags, void *data) { 139 if (handle) { 140 koala_t image; 141 142 // read the load address 143 144 unsigned char load_address[2]; // highbit, lowbit 145 146 io->read_proc(&load_address, 1, 2, handle); 147 148 // if the load address is correct, skip it. otherwise ignore the load address 149 150 if ((load_address[0] != 0x00) || (load_address[1] != 0x60)) { 151 ((BYTE *)&image)[0] = load_address[0]; 152 ((BYTE *)&image)[1] = load_address[1]; 153 154 io->read_proc((BYTE *)&image + 2, 1, 10001 - 2, handle); 155 } else { 156 io->read_proc(&image, 1, 10001, handle); 157 } 158 159 // build DIB in memory 160 161 FIBITMAP *dib = FreeImage_Allocate(CBM_WIDTH, CBM_HEIGHT, 4); 162 163 if (dib) { 164 // write out the commodore 64 color palette 165 166 RGBQUAD *palette = FreeImage_GetPalette(dib); 167 168 for (int i = 0; i < 16; i++) { 169 palette[i].rgbBlue = (BYTE)c64colours[i].b; 170 palette[i].rgbGreen = (BYTE)c64colours[i].g; 171 palette[i].rgbRed = (BYTE)c64colours[i].r; 172 } 173 174 // write out bitmap data 175 176 BYTE pixel_mask[4] = { 0xc0, 0x30, 0x0c, 0x03 }; 177 BYTE pixel_displacement[4] = { 6, 4, 2, 0 }; 178 int pixel, index, colourindex; 179 unsigned char found_color = 0; 180 181 for (int y = 0; y < 200; y++) { 182 for (int x = 0; x < 160; x++) { 183 // Get value of pixel at (x,y) 184 185 index = (x / 4) * 8 + (y % 8) + (y / 8) * CBM_WIDTH; 186 colourindex = (x / 4) + (y / 8) * 40; 187 pixel = (image.image[index] & pixel_mask[x % 4]) >> pixel_displacement[x % 4]; 188 189 // Retrieve RGB values 190 191 switch (pixel) { 192 case 0: // Background 193 found_color = image.background; 194 break; 195 196 case 1: // Colour 1 197 found_color = image.colour1[colourindex] >> 4; 198 break; 199 200 case 2: // Colour 2 201 found_color = image.colour1[colourindex] & 0xf; 202 break; 203 204 case 3: // Colour 3 205 found_color = image.colour2[colourindex] & 0xf; 206 break; 207 }; 208 209 *(FreeImage_GetScanLine(dib, CBM_HEIGHT - y - 1) + x) = (found_color << 4) | found_color; 210 } 211 } 212 213 return dib; 214 } 215 } 216 217 return NULL; 218} 219 220// ========================================================== 221// Init 222// ========================================================== 223 224void DLL_CALLCONV 225InitKOALA(Plugin *plugin, int format_id) { 226 s_format_id = format_id; 227 228 plugin->format_proc = Format; 229 plugin->description_proc = Description; 230 plugin->extension_proc = Extension; 231 plugin->regexpr_proc = RegExpr; 232 plugin->open_proc = NULL; 233 plugin->close_proc = NULL; 234 plugin->pagecount_proc = NULL; 235 plugin->pagecapability_proc = NULL; 236 plugin->load_proc = Load; 237 plugin->save_proc = NULL; 238 plugin->validate_proc = Validate; 239 plugin->mime_proc = MimeType; 240 plugin->supports_export_bpp_proc = SupportsExportDepth; 241 plugin->supports_export_type_proc = SupportsExportType; 242 plugin->supports_icc_profiles_proc = NULL; 243}