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79 lines
2.8 KiB
C
79 lines
2.8 KiB
C
/********************************************************************************************
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*
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* PNGU
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*
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* Original author: frontier (http://frontier-dev.net)
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* Modified by Tantric, 2009-2010
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*
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********************************************************************************************/
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#ifndef __PNGU__
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#define __PNGU__
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Types
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typedef unsigned char PNGU_u8;
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typedef unsigned short PNGU_u16;
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typedef unsigned int PNGU_u32;
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typedef unsigned long long PNGU_u64;
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typedef struct
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{
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PNGU_u8 r;
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PNGU_u8 g;
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PNGU_u8 b;
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} PNGUCOLOR;
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typedef struct
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{
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PNGU_u32 imgWidth; // In pixels
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PNGU_u32 imgHeight; // In pixels
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PNGU_u32 imgBitDepth; // In bitx
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PNGU_u32 imgColorType; // PNGU_COLOR_TYPE_*
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PNGU_u32 validBckgrnd; // Non zero if there is a background color
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PNGUCOLOR bckgrnd; // Backgroun color
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PNGU_u32 numTrans; // Number of transparent colors
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PNGUCOLOR *trans; // Transparent colors
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} PNGUPROP;
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// Image context, always initialize with SelectImageFrom* and free with ReleaseImageContext
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struct _IMGCTX;
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typedef struct _IMGCTX *IMGCTX;
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/****************************************************************************
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* Image context handling *
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****************************************************************************/
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// Selects a PNG file, previosly loaded into a buffer, and creates an image context for subsequent procesing.
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IMGCTX PNGU_SelectImageFromBuffer (const void *buffer);
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// Selects a PNG file, from any devoptab device, and creates an image context for subsequent procesing.
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IMGCTX PNGU_SelectImageFromDevice (const char *filename);
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// Frees resources associated with an image context. Always call this function when you no longer need the IMGCTX.
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void PNGU_ReleaseImageContext (IMGCTX ctx);
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/****************************************************************************
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* Miscellaneous *
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****************************************************************************/
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// Retrieves info from selected PNG file, including image dimensions, color format, background and transparency colors.
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int PNGU_GetImageProperties (IMGCTX ctx, PNGUPROP *fileproperties);
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/****************************************************************************
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* Image conversion *
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****************************************************************************/
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PNGU_u8 * DecodePNG(const PNGU_u8 *src, int *width, int *height, int maxwidth, int maxheight);
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int PNGU_EncodeFromRGB (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
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int PNGU_EncodeFromGXTexture (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
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#ifdef __cplusplus
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}
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#endif
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#endif
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