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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 | |