mirror of
https://github.com/Fledge68/WiiFlow_Lite.git
synced 2024-12-26 03:41:55 +01:00
174 lines
7.7 KiB
C
174 lines
7.7 KiB
C
/********************************************************************************************
|
|
|
|
PNGU Version : 0.2a
|
|
|
|
Coder : frontier
|
|
|
|
More info : http://frontier-dev.net
|
|
|
|
********************************************************************************************/
|
|
#ifndef __PNGU__
|
|
#define __PNGU__
|
|
|
|
// Return codes
|
|
#define PNGU_OK 0
|
|
#define PNGU_ODD_WIDTH 1
|
|
#define PNGU_ODD_STRIDE 2
|
|
#define PNGU_INVALID_WIDTH_OR_HEIGHT 3
|
|
#define PNGU_FILE_IS_NOT_PNG 4
|
|
#define PNGU_UNSUPPORTED_COLOR_TYPE 5
|
|
#define PNGU_NO_FILE_SELECTED 6
|
|
#define PNGU_CANT_OPEN_FILE 7
|
|
#define PNGU_CANT_READ_FILE 8
|
|
#define PNGU_LIB_ERROR 9
|
|
|
|
// Color types
|
|
#define PNGU_COLOR_TYPE_GRAY 1
|
|
#define PNGU_COLOR_TYPE_GRAY_ALPHA 2
|
|
#define PNGU_COLOR_TYPE_PALETTE 3
|
|
#define PNGU_COLOR_TYPE_RGB 4
|
|
#define PNGU_COLOR_TYPE_RGB_ALPHA 5
|
|
#define PNGU_COLOR_TYPE_UNKNOWN 6
|
|
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// Types
|
|
typedef unsigned char PNGU_u8;
|
|
typedef unsigned short PNGU_u16;
|
|
typedef unsigned int PNGU_u32;
|
|
typedef unsigned long long PNGU_u64;
|
|
|
|
typedef struct
|
|
{
|
|
PNGU_u8 r;
|
|
PNGU_u8 g;
|
|
PNGU_u8 b;
|
|
} PNGUCOLOR;
|
|
|
|
typedef struct
|
|
{
|
|
PNGU_u32 imgWidth; // In pixels
|
|
PNGU_u32 imgHeight; // In pixels
|
|
PNGU_u32 imgBitDepth; // In bitx
|
|
PNGU_u32 imgColorType; // PNGU_COLOR_TYPE_*
|
|
PNGU_u32 validBckgrnd; // Non zero if there is a background color
|
|
PNGUCOLOR bckgrnd; // Backgroun color
|
|
PNGU_u32 numTrans; // Number of transparent colors
|
|
PNGUCOLOR *trans; // Transparent colors
|
|
} PNGUPROP;
|
|
|
|
// Image context, always initialize with SelectImageFrom* and free with ReleaseImageContext
|
|
struct _IMGCTX;
|
|
typedef struct _IMGCTX *IMGCTX;
|
|
|
|
|
|
/****************************************************************************
|
|
* Pixel conversion *
|
|
****************************************************************************/
|
|
|
|
// Macro to convert RGB8 values to RGB565
|
|
#define PNGU_RGB8_TO_RGB565(r,g,b) ( ((((PNGU_u16) r) & 0xF8U) << 8) | ((((PNGU_u16) g) & 0xFCU) << 3) | (((PNGU_u16) b) >> 3) )
|
|
|
|
// Macro to convert RGBA8 values to RGB5A3
|
|
#define PNGU_RGB8_TO_RGB5A3(r,g,b,a) (PNGU_u16) (((a & 0xE0U) == 0xE0U) ? \
|
|
(0x8000U | ((((PNGU_u16) r) & 0xF8U) << 7) | ((((PNGU_u16) g) & 0xF8U) << 2) | (((PNGU_u16) b) >> 3)) : \
|
|
(((((PNGU_u16) a) & 0xE0U) << 7) | ((((PNGU_u16) r) & 0xF0U) << 4) | (((PNGU_u16) g) & 0xF0U) | ((((PNGU_u16) b) & 0xF0U) >> 4)))
|
|
|
|
// Function to convert two RGB8 values to YCbYCr
|
|
PNGU_u32 PNGU_RGB8_TO_YCbYCr (PNGU_u8 r1, PNGU_u8 g1, PNGU_u8 b1, PNGU_u8 r2, PNGU_u8 g2, PNGU_u8 b2);
|
|
|
|
// Function to convert an YCbYCr to two RGB8 values.
|
|
void PNGU_YCbYCr_TO_RGB8 (PNGU_u32 ycbycr, PNGU_u8 *r1, PNGU_u8 *g1, PNGU_u8 *b1, PNGU_u8 *r2, PNGU_u8 *g2, PNGU_u8 *b2);
|
|
|
|
|
|
/****************************************************************************
|
|
* Image context handling *
|
|
****************************************************************************/
|
|
|
|
// Selects a PNG file, previosly loaded into a buffer, and creates an image context for subsequent procesing.
|
|
IMGCTX PNGU_SelectImageFromBuffer (const void *buffer);
|
|
|
|
// Selects a PNG file, from any devoptab device, and creates an image context for subsequent procesing.
|
|
IMGCTX PNGU_SelectImageFromDevice (const char *filename);
|
|
|
|
// Frees resources associated with an image context. Always call this function when you no longer need the IMGCTX.
|
|
void PNGU_ReleaseImageContext (IMGCTX ctx);
|
|
|
|
|
|
/****************************************************************************
|
|
* Miscelaneous *
|
|
****************************************************************************/
|
|
|
|
// Retrieves info from selected PNG file, including image dimensions, color format, background and transparency colors.
|
|
int PNGU_GetImageProperties (IMGCTX ctx, PNGUPROP *fileproperties);
|
|
|
|
|
|
/****************************************************************************
|
|
* Image conversion *
|
|
****************************************************************************/
|
|
|
|
// Expands selected image into an YCbYCr buffer. You need to specify context, image dimensions,
|
|
// destination address and stride in pixels (stride = buffer width - image width).
|
|
int PNGU_DecodeToYCbYCr (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
|
|
|
|
// Macro for decoding an image inside a buffer at given coordinates.
|
|
#define PNGU_DECODE_TO_COORDS_YCbYCr(ctx,coordX,coordY,imgWidth,imgHeight,bufferWidth,bufferHeight,buffer) \
|
|
\
|
|
PNGU_DecodeToYCbYCr (ctx, imgWidth, imgHeight, ((void *) buffer) + (coordY) * (bufferWidth) * 2 + \
|
|
(coordX) * 2, (bufferWidth) - (imgWidth))
|
|
|
|
// Expands selected image into a linear RGB565 buffer. You need to specify context, image dimensions,
|
|
// destination address and stride in pixels (stride = buffer width - image width).
|
|
int PNGU_DecodeToRGB565 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
|
|
|
|
// Macro for decoding an image inside a buffer at given coordinates.
|
|
#define PNGU_DECODE_TO_COORDS_RGB565(ctx,coordX,coordY,imgWidth,imgHeight,bufferWidth,bufferHeight,buffer) \
|
|
\
|
|
PNGU_DecodeToRGB565 (ctx, imgWidth, imgHeight, ((void *) buffer) + (coordY) * (bufferWidth) * 2 + \
|
|
(coordX) * 2, (bufferWidth) - (imgWidth))
|
|
|
|
// Expands selected image into a linear RGBA8 buffer. You need to specify context, image dimensions,
|
|
// destination address, stride in pixels and default alpha value, which is used if the source image
|
|
// doesn't have an alpha channel.
|
|
int PNGU_DecodeToRGBA8 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride, PNGU_u8 default_alpha);
|
|
|
|
// Macro for decoding an image inside a buffer at given coordinates.
|
|
#define PNGU_DECODE_TO_COORDS_RGBA8(ctx,coordX,coordY,imgWidth,imgHeight,default_alpha,bufferWidth,bufferHeight,buffer) \
|
|
\
|
|
PNGU_DecodeToRGBA8 (ctx, imgWidth, imgHeight, ((void *) buffer) + (coordY) * (bufferWidth) * 2 + \
|
|
(coordX) * 2, (bufferWidth) - (imgWidth), default_alpha)
|
|
|
|
// Expands selected image into a 4x4 tiled RGB565 buffer. You need to specify context, image dimensions
|
|
// and destination address.
|
|
int PNGU_DecodeTo4x4RGB565 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer);
|
|
|
|
// Expands selected image into a 4x4 tiled RGB5A3 buffer. You need to specify context, image dimensions,
|
|
// destination address and default alpha value, which is used if the source image doesn't have an alpha channel.
|
|
int PNGU_DecodeTo4x4RGB5A3 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u8 default_alpha);
|
|
|
|
// Expands selected image into a 4x4 tiled RGBA8 buffer. You need to specify context, image dimensions,
|
|
// destination address and default alpha value, which is used if the source image doesn't have an alpha channel.
|
|
int PNGU_DecodeTo4x4RGBA8 (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u8 default_alpha);
|
|
|
|
// Encodes an YCbYCr image in PNG format and stores it in the selected device or memory buffer. You need to
|
|
// specify context, image dimensions, destination address and stride in pixels (stride = buffer width - image width).
|
|
int PNGU_EncodeFromYCbYCr (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
|
|
|
|
int PNGU_EncodeFromGXTexture (IMGCTX ctx, PNGU_u32 width, PNGU_u32 height, void *buffer, PNGU_u32 stride);
|
|
|
|
// Macro for encoding an image stored into an YCbYCr buffer at given coordinates.
|
|
#define PNGU_ENCODE_TO_COORDS_YCbYCr(ctx,coordX,coordY,imgWidth,imgHeight,bufferWidth,bufferHeight,buffer) \
|
|
\
|
|
PNGU_EncodeFromYCbYCr (ctx, imgWidth, imgHeight, ((void *) buffer) + (coordY) * (bufferWidth) * 2 + \
|
|
(coordX) * 2, (bufferWidth) - (imgWidth))
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif
|
|
|