| 1 | #ifndef _BMG_IMAGE_H_ |
| 2 | #define _BMG_IMAGE_H_ |
| 3 | /* |
| 4 | // header file for the BMGImage functions |
| 5 | // |
| 6 | // Copyright 2000, 2001 M. Scott Heiman |
| 7 | // |
| 8 | // You may use the software for any purpose you see fit. You may modify |
| 9 | // it, incorporate it in a commercial application, use it for school, |
| 10 | // even turn it in as homework. You must keep the Copyright in the |
| 11 | // header and source files. This software is not in the "Public Domain". |
| 12 | // You may use this software at your own risk. I have made a reasonable |
| 13 | // effort to verify that this software works in the manner I expect it to; |
| 14 | // however,... |
| 15 | // |
| 16 | // THE MATERIAL EMBODIED ON THIS SOFTWARE IS PROVIDED TO YOU "AS-IS" AND |
| 17 | // WITHOUT WARRANTY OF ANY KIND, EXPRESS, IMPLIED OR OTHERWISE, INCLUDING |
| 18 | // WITHOUT LIMITATION, ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A |
| 19 | // PARTICULAR PURPOSE. IN NO EVENT SHALL MICHAEL S. HEIMAN BE LIABLE TO |
| 20 | // YOU OR ANYONE ELSE FOR ANY DIRECT, SPECIAL, INCIDENTAL, INDIRECT OR |
| 21 | // CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER, INCLUDING |
| 22 | // WITHOUT LIMITATION, LOSS OF PROFIT, LOSS OF USE, SAVINGS OR REVENUE, |
| 23 | // OR THE CLAIMS OF THIRD PARTIES, WHETHER OR NOT MICHAEL S. HEIMAN HAS |
| 24 | // BEEN ADVISED OF THE POSSIBILITY OF SUCH LOSS, HOWEVER CAUSED AND ON |
| 25 | // ANY THEORY OF LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE |
| 26 | // POSSESSION, USE OR PERFORMANCE OF THIS SOFTWARE. |
| 27 | */ |
| 28 | |
| 29 | #include "../osal_preproc.h" |
| 30 | |
| 31 | #if !defined(WIN32) |
| 32 | typedef struct tagRGBQUAD |
| 33 | { |
| 34 | unsigned char rgbBlue; |
| 35 | unsigned char rgbGreen; |
| 36 | unsigned char rgbRed; |
| 37 | unsigned char rgbReserved; |
| 38 | } RGBQUAD; |
| 39 | #endif |
| 40 | |
| 41 | enum BMG_Error |
| 42 | { |
| 43 | BMG_OK = 0, |
| 44 | errLib = 1, |
| 45 | errInvalidPixelFormat = 2, |
| 46 | errMemoryAllocation = 3, |
| 47 | errInvalidSize = 4, |
| 48 | errInvalidBitmapHandle = 5, |
| 49 | errWindowsAPI = 6, |
| 50 | errFileOpen = 7, |
| 51 | errUnsupportedFileFormat = 8, |
| 52 | errInvalidBMGImage = 9, |
| 53 | errInvalidFileExtension = 10, |
| 54 | errFileRead = 11, |
| 55 | errFileWrite = 12, |
| 56 | errInvalidGeoTIFFPointer = 13, |
| 57 | errUndefinedBGImage = 14, |
| 58 | errBGImageTooSmall = 15, |
| 59 | errCorruptFile = 16 |
| 60 | }; |
| 61 | |
| 62 | typedef enum BMG_Error BMGError; |
| 63 | |
| 64 | #pragma pack(push,1) |
| 65 | struct BMGImageStruct |
| 66 | { |
| 67 | unsigned int width; |
| 68 | unsigned int height; |
| 69 | unsigned char bits_per_pixel; |
| 70 | unsigned char *bits; |
| 71 | unsigned short palette_size; |
| 72 | unsigned char bytes_per_palette_entry; |
| 73 | unsigned char *palette; |
| 74 | unsigned int scan_width; |
| 75 | int opt_for_bmp; /*= 1 if memory has been sized for HBITMAP, 0 otherwise*/ |
| 76 | short transparency_index; |
| 77 | }; |
| 78 | #pragma pack(pop) |
| 79 | |
| 80 | #if defined(__cplusplus) |
| 81 | extern "C" { |
| 82 | #endif |
| 83 | |
| 84 | /* initializes a BMGImage to default values */ |
| 85 | extern |
| 86 | void InitBMGImage(struct BMGImageStruct *img ); |
| 87 | |
| 88 | /* frees memory allocated to a BMGImage */ |
| 89 | extern |
| 90 | void FreeBMGImage( struct BMGImageStruct *img ); |
| 91 | |
| 92 | /* allocates memory (bits & palette) for a BMGImage. |
| 93 | returns 1 if successfull, 0 otherwise. |
| 94 | width, height, bits_per_pixel, palette_size, & opt_for_bmp must have valid |
| 95 | values before this function is called. |
| 96 | Assumes that all images with bits_per_pixel <= 8 requires a palette. |
| 97 | will set bits_per_palette_entry, scan_width, bits, & palette */ |
| 98 | extern |
| 99 | BMGError AllocateBMGImage( struct BMGImageStruct *img ); |
| 100 | |
| 101 | /* compresses 8 BPP paletted images to 1 BPP or 4 BPP paletted images if |
| 102 | possible */ |
| 103 | extern |
| 104 | BMGError CompressBMGImage( struct BMGImageStruct *img ); |
| 105 | |
| 106 | |
| 107 | /* a utility function for freeing memory created in BMGLib */ |
| 108 | extern |
| 109 | void FreeBMGMemory( unsigned char *mem ); |
| 110 | |
| 111 | /* converts a color image to a gray scale image */ |
| 112 | extern |
| 113 | BMGError ConvertToGrayScale( struct BMGImageStruct *img ); |
| 114 | |
| 115 | /* converts a color image to a pseudo-gray scale image */ |
| 116 | extern |
| 117 | BMGError ConvertToPseudoGrayScale( struct BMGImageStruct *img ); |
| 118 | |
| 119 | /* stores the contents of a bitmap into a BMGImageStruct */ |
| 120 | extern |
| 121 | BMGError GetDataFromBitmap( HBITMAP hBitmap, |
| 122 | struct BMGImageStruct *img, |
| 123 | int remove_alpha ); |
| 124 | |
| 125 | /* creates an HBITMAP from a BMGImageStruct */ |
| 126 | extern |
| 127 | HBITMAP CreateBitmapFromData( struct BMGImageStruct img, |
| 128 | int alpha_blend ); |
| 129 | |
| 130 | /* sets the background color for alpha blending |
| 131 | color points to an array of 4 unsigned chars |
| 132 | color[0] = blue, color[1] = green, color[2] = red, color[3] = unused */ |
| 133 | extern |
| 134 | void SetBMGBackgroundColor( unsigned char *color ); |
| 135 | |
| 136 | /* defines the background bitmap that is used for alpha blending & transparent |
| 137 | pixels */ |
| 138 | extern |
| 139 | BMGError SetBMGBackgroundBitmap( HBITMAP hBitmap ); |
| 140 | |
| 141 | /* defines the background image that is used for alpha blending & transparent |
| 142 | pixels */ |
| 143 | extern |
| 144 | BMGError SetBMGBackgroundImage( struct BMGImageStruct img ); |
| 145 | |
| 146 | /* Converts paletted images and 16-BPP images to 24-BPP images */ |
| 147 | extern |
| 148 | BMGError ConvertPaletteToRGB( struct BMGImageStruct img_in, |
| 149 | struct BMGImageStruct *img_out ); |
| 150 | |
| 151 | /* copies the contents of the input image into the output image */ |
| 152 | extern |
| 153 | BMGError CopyBMGImage( struct BMGImageStruct img_in, |
| 154 | struct BMGImageStruct *img_out ); |
| 155 | |
| 156 | /* returns the last error state */ |
| 157 | extern |
| 158 | BMGError GetLastBMGError(); |
| 159 | |
| 160 | /* gets the error message */ |
| 161 | extern |
| 162 | void GetLastBMGErrorMessage( const char **msg ); |
| 163 | |
| 164 | #if defined(__cplusplus) |
| 165 | } |
| 166 | #endif |
| 167 | |
| 168 | #endif |
| 169 | |