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| 1 | +/* Allegro wrapper routines for FreeImage |
| 2 | + * by Karthik Kumar Viswanathan <[email protected]>. |
| 3 | + */ |
| 4 | + |
| 5 | +#include <FreeImage.h> |
| 6 | + |
| 7 | +#include "allegro5/allegro.h" |
| 8 | +#include "allegro5/allegro_image.h" |
| 9 | +#include "allegro5/internal/aintern_exitfunc.h" |
| 10 | +#include "allegro5/internal/aintern_image.h" |
| 11 | + |
| 12 | +#include "iio.h" |
| 13 | + |
| 14 | +ALLEGRO_DEBUG_CHANNEL("image") |
| 15 | + |
| 16 | +static bool freeimage_initialized = false; |
| 17 | + |
| 18 | +bool _al_init_fi(void) |
| 19 | +{ |
| 20 | + if(freeimage_initialized) |
| 21 | + return true; |
| 22 | + FreeImage_Initialise(FALSE); |
| 23 | + _al_add_exit_func(_al_shutdown_fi, "_al_shutdown_fi"); |
| 24 | + return true; |
| 25 | +} |
| 26 | + |
| 27 | +void _al_shutdown_fi(void) |
| 28 | +{ |
| 29 | + if(!freeimage_initialized) |
| 30 | + return; |
| 31 | + FreeImage_DeInitialise(); |
| 32 | + freeimage_initialized = false; |
| 33 | +} |
| 34 | + |
| 35 | +static ALLEGRO_BITMAP *_al_fi_to_al_bitmap(FIBITMAP *fib) { |
| 36 | + int width = 0, height = 0; |
| 37 | + ALLEGRO_BITMAP *bitmap = NULL; |
| 38 | + width = FreeImage_GetWidth(fib); |
| 39 | + height = FreeImage_GetHeight(fib); |
| 40 | + bitmap = al_create_bitmap(width, height); |
| 41 | + if(bitmap) { |
| 42 | + ALLEGRO_LOCKED_REGION *a_lock = al_lock_bitmap(bitmap, |
| 43 | + ALLEGRO_PIXEL_FORMAT_ARGB_8888, ALLEGRO_LOCK_WRITEONLY); |
| 44 | + if (a_lock) { |
| 45 | + unsigned char *out = (unsigned char *)a_lock->data; |
| 46 | + int out_inc = a_lock->pitch - (width*4); |
| 47 | + for(int j=height - 1; j > -1; --j) { |
| 48 | + for(int i=0; i < width; ++i) { |
| 49 | + RGBQUAD color; |
| 50 | + if(FreeImage_GetPixelColor(fib, i, j, &color) == FALSE) { |
| 51 | + ALLEGRO_ERROR("Unable to get pixel data at %d,%d\n", i , j); |
| 52 | + } |
| 53 | + *out++ = (unsigned char) color.rgbBlue; |
| 54 | + *out++ = (unsigned char) color.rgbGreen; |
| 55 | + *out++ = (unsigned char) color.rgbRed; |
| 56 | + *out++ = (unsigned char) color.rgbReserved; |
| 57 | + } |
| 58 | + out += out_inc; |
| 59 | + } |
| 60 | + al_unlock_bitmap(bitmap); |
| 61 | + } |
| 62 | + } |
| 63 | + return bitmap; |
| 64 | +} |
| 65 | + |
| 66 | +ALLEGRO_BITMAP *_al_load_fi_bitmap(const char *filename, int flags) |
| 67 | +{ |
| 68 | + FIBITMAP *fib = NULL; |
| 69 | + ALLEGRO_BITMAP *bitmap = NULL; |
| 70 | + FREE_IMAGE_FORMAT fif = FIF_UNKNOWN; |
| 71 | + |
| 72 | + ASSERT(filename); |
| 73 | + ASSERT(freeimage_initialized == true); |
| 74 | + |
| 75 | + fif = FreeImage_GetFIFFromFilename(filename); |
| 76 | + if(fif == FIF_UNKNOWN) |
| 77 | + fif = FreeImage_GetFileType(filename, 0); |
| 78 | + if(fif == FIF_UNKNOWN) |
| 79 | + return bitmap; |
| 80 | + |
| 81 | + { |
| 82 | + FIBITMAP *fibRaw = FreeImage_Load(fif, filename, flags); |
| 83 | + if(!fibRaw) |
| 84 | + return bitmap; |
| 85 | + fib = FreeImage_ConvertTo32Bits(fibRaw); |
| 86 | + FreeImage_Unload(fibRaw); |
| 87 | + if(!fib) |
| 88 | + return bitmap; |
| 89 | + } |
| 90 | + |
| 91 | + bitmap = _al_fi_to_al_bitmap(fib); |
| 92 | + FreeImage_Unload(fib); |
| 93 | + return bitmap; |
| 94 | +} |
| 95 | + |
| 96 | +static unsigned int _fiio_al_read(void *buffer, unsigned size, unsigned count, fi_handle handle) { |
| 97 | + return (unsigned int) al_fread((ALLEGRO_FILE *)handle, buffer, (count * size)); |
| 98 | +} |
| 99 | + |
| 100 | +static unsigned int _fiio_al_write(void *buffer, unsigned size, unsigned count, fi_handle handle) { |
| 101 | + return (unsigned int) al_fwrite((ALLEGRO_FILE *)handle, buffer, (count * size)); |
| 102 | +} |
| 103 | + |
| 104 | +static int _fiio_al_fseek(fi_handle handle, long offset, int origin) { |
| 105 | + return al_fseek((ALLEGRO_FILE *)handle, offset, origin); |
| 106 | +} |
| 107 | + |
| 108 | +static long _fiio_al_ftell(fi_handle handle) { |
| 109 | + return (long) al_ftell((ALLEGRO_FILE *)handle); |
| 110 | +} |
| 111 | + |
| 112 | +ALLEGRO_BITMAP *_al_load_fi_bitmap_f(ALLEGRO_FILE *f, int flags) |
| 113 | +{ |
| 114 | + FreeImageIO fio; |
| 115 | + ALLEGRO_BITMAP *bitmap = NULL; |
| 116 | + FIBITMAP *fib = NULL; |
| 117 | + FREE_IMAGE_FORMAT fif = FIF_UNKNOWN; |
| 118 | + |
| 119 | + ASSERT(f); |
| 120 | + ASSERT(freeimage_initialized == true); |
| 121 | + |
| 122 | + fio.read_proc = _fiio_al_read; |
| 123 | + fio.write_proc = _fiio_al_write; |
| 124 | + fio.seek_proc = _fiio_al_fseek; |
| 125 | + fio.tell_proc = _fiio_al_ftell; |
| 126 | + |
| 127 | + fif = FreeImage_GetFileTypeFromHandle(&fio, (fi_handle)f, 0); |
| 128 | + if(fif == FIF_UNKNOWN) |
| 129 | + return bitmap; |
| 130 | + |
| 131 | + { |
| 132 | + FIBITMAP *fibRaw = FreeImage_LoadFromHandle(fif, &fio, (fi_handle)f, 0); |
| 133 | + if(!fibRaw) |
| 134 | + return bitmap; |
| 135 | + fib = FreeImage_ConvertTo32Bits(fibRaw); |
| 136 | + FreeImage_Unload(fibRaw); |
| 137 | + if(!fib) |
| 138 | + return bitmap; |
| 139 | + } |
| 140 | + |
| 141 | + bitmap = _al_fi_to_al_bitmap(fib); |
| 142 | + FreeImage_Unload(fib); |
| 143 | + return bitmap; |
| 144 | +} |
| 145 | + |
| 146 | +bool _al_identify_fi(ALLEGRO_FILE *f) |
| 147 | +{ |
| 148 | + FreeImageIO fio; |
| 149 | + ALLEGRO_BITMAP *bitmap = NULL; |
| 150 | + FREE_IMAGE_FORMAT fif = FIF_UNKNOWN; |
| 151 | + |
| 152 | + ASSERT(f); |
| 153 | + ASSERT(freeimage_initialized == true); |
| 154 | + |
| 155 | + fio.read_proc = _fiio_al_read; |
| 156 | + fio.write_proc = _fiio_al_write; |
| 157 | + fio.seek_proc = _fiio_al_fseek; |
| 158 | + fio.tell_proc = _fiio_al_ftell; |
| 159 | + |
| 160 | + fif = FreeImage_GetFileTypeFromHandle(&fio, (fi_handle)f, 0); |
| 161 | + if(fif == FIF_UNKNOWN) |
| 162 | + return false; |
| 163 | + |
| 164 | + return true; |
| 165 | +} |
| 166 | + |
| 167 | + |
| 168 | +/* vim: set sts=3 sw=3 et: */ |
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