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91 lines
3.2 KiB
C
91 lines
3.2 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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* This is Tantric's modified/condensed version + RGB565 decoder from original
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*
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********************************************************************************************/
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#ifndef __PNGU__
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#define __PNGU__
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#include <gccore.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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// Return codes
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#define PNGU_OK 0
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#define PNGU_ODD_WIDTH 1
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#define PNGU_ODD_STRIDE 2
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#define PNGU_INVALID_WIDTH_OR_HEIGHT 3
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#define PNGU_FILE_IS_NOT_PNG 4
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#define PNGU_UNSUPPORTED_COLOR_TYPE 5
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#define PNGU_NO_FILE_SELECTED 6
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#define PNGU_CANT_OPEN_FILE 7
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#define PNGU_CANT_READ_FILE 8
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#define PNGU_LIB_ERROR 9
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typedef struct
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{
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u8 r;
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u8 g;
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u8 b;
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} PNGUCOLOR;
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typedef struct
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{
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u32 imgWidth; // In pixels
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u32 imgHeight; // In pixels
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u32 imgBitDepth; // In bitx
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u32 imgColorType; // PNGU_COLOR_TYPE_*
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u32 validBckgrnd; // Non zero if there is a background color
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PNGUCOLOR bckgrnd; // Background color
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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, previously loaded into a buffer, and creates an image context for subsequent processing.
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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 processing.
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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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u8 * DecodePNG(const u8 *src, int *width, int *height, u8 *dst, int maxwidth, int maxheight);
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int PNGU_EncodeFromRGB (IMGCTX ctx, u32 width, u32 height, void *buffer, u32 stride);
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int PNGU_EncodeFromGXTexture (IMGCTX ctx, u32 width, u32 height, void *buffer, u32 stride);
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int PNGU_EncodeFromEFB (IMGCTX ctx, u32 width, u32 height);
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int PNGU_DecodeTo4x4RGB565 (IMGCTX ctx, u32 width, u32 height, void *buffer);
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int PNGU_EncodeFromLinearRGB565 (IMGCTX ctx, u32 width, u32 height, const void* buffer, int rowlength);
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#ifdef __cplusplus
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}
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#endif
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#endif
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