2 * PNG loader library for OpenGL v1.45 (10/07/00)
3 * by Ben Wyatt ben@wyatt100.freeserve.co.uk
4 * Using LibPNG 1.0.2 and ZLib 1.1.3
6 * This software is provided 'as-is', without any express or implied warranty.
7 * In no event will the author be held liable for any damages arising from the
8 * use of this software.
10 * Permission is hereby granted to use, copy, modify, and distribute this
11 * source code, or portions hereof, for any purpose, without fee, subject to
12 * the following restrictions:
14 * 1. The origin of this source code must not be misrepresented. You must not
15 * claim that you wrote the original software. If you use this software in
16 * a product, an acknowledgment in the product documentation would be
17 * appreciated but is not required.
18 * 2. Altered versions must be plainly marked as such and must not be
19 * misrepresented as being the original source.
20 * 3. This notice must not be removed or altered from any source distribution.
34 #pragma comment (lib, "glpngd.lib")
36 #pragma comment (lib, "glpng.lib")
40 /* XXX This is from Win32's <windef.h> */
42 #if (_MSC_VER >= 800) || defined(_STDCALL_SUPPORTED)
43 #define APIENTRY __stdcall
49 /* Mipmapping parameters */
50 #define PNG_NOMIPMAPS 0 /* No mipmapping */
51 #define PNG_BUILDMIPMAPS -1 /* Calls a clone of gluBuild2DMipmaps() */
52 #define PNG_SIMPLEMIPMAPS -2 /* Generates mipmaps without filtering */
54 /* Who needs an "S" anyway? */
55 #define PNG_NOMIPMAP PNG_NOMIPMAPS
56 #define PNG_BUILDMIPMAP PNG_BUILDMIPMAPS
57 #define PNG_SIMPLEMIPMAP PNG_SIMPLEMIPMAPS
59 /* Transparency parameters */
60 #define PNG_CALLBACK -3 /* Call the callback function to generate alpha */
61 #define PNG_ALPHA -2 /* Use alpha channel in PNG file, if there is one */
62 #define PNG_SOLID -1 /* No transparency */
63 #define PNG_STENCIL 0 /* Sets alpha to 0 for r=g=b=0, 1 otherwise */
64 #define PNG_BLEND1 1 /* a = r+g+b */
65 #define PNG_BLEND2 2 /* a = (r+g+b)/2 */
66 #define PNG_BLEND3 3 /* a = (r+g+b)/3 */
67 #define PNG_BLEND4 4 /* a = r*r+g*g+b*b */
68 #define PNG_BLEND5 5 /* a = (r*r+g*g+b*b)/2 */
69 #define PNG_BLEND6 6 /* a = (r*r+g*g+b*b)/3 */
70 #define PNG_BLEND7 7 /* a = (r*r+g*g+b*b)/4 */
71 #define PNG_BLEND8 8 /* a = sqrt(r*r+g*g+b*b) */
86 unsigned int Components
;
88 unsigned char *Palette
;
91 extern int APIENTRY
pngLoadRaw(const char *filename
, pngRawInfo
*rawinfo
);
92 extern int APIENTRY
pngLoadRawF(FILE *file
, pngRawInfo
*rawinfo
);
94 extern int APIENTRY
pngLoad(const char *filename
, int mipmap
, int trans
, pngInfo
*info
);
95 extern int APIENTRY
pngLoadF(FILE *file
, int mipmap
, int trans
, pngInfo
*info
);
97 extern unsigned int APIENTRY
pngBind(const char *filename
, int mipmap
, int trans
, pngInfo
*info
, int wrapst
, int minfilter
, int magfilter
);
98 extern unsigned int APIENTRY
pngBindF(FILE *file
, int mipmap
, int trans
, pngInfo
*info
, int wrapst
, int minfilter
, int magfilter
);
100 extern void APIENTRY
pngSetStencil(unsigned char red
, unsigned char green
, unsigned char blue
);
101 extern void APIENTRY
pngSetAlphaCallback(unsigned char (*callback
)(unsigned char red
, unsigned char green
, unsigned char blue
));
102 extern void APIENTRY
pngSetViewingGamma(double viewingGamma
);
103 extern void APIENTRY
pngSetStandardOrientation(int standardorientation
);