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Diffstat (limited to 'blt/src/bltImage.h')
| -rw-r--r-- | blt/src/bltImage.h | 287 |
1 files changed, 287 insertions, 0 deletions
diff --git a/blt/src/bltImage.h b/blt/src/bltImage.h new file mode 100644 index 00000000000..3ddfe701fb6 --- /dev/null +++ b/blt/src/bltImage.h @@ -0,0 +1,287 @@ +/* + * bltImage.h -- + * + * Copyright 1993-1998 Lucent Technologies, Inc. + * + * Permission to use, copy, modify, and distribute this software and + * its documentation for any purpose and without fee is hereby + * granted, provided that the above copyright notice appear in all + * copies and that both that the copyright notice and warranty + * disclaimer appear in supporting documentation, and that the names + * of Lucent Technologies any of their entities not be used in + * advertising or publicity pertaining to distribution of the software + * without specific, written prior permission. + * + * Lucent Technologies disclaims all warranties with regard to this + * software, including all implied warranties of merchantability and + * fitness. In no event shall Lucent Technologies be liable for any + * special, indirect or consequential damages or any damages + * whatsoever resulting from loss of use, data or profits, whether in + * an action of contract, negligence or other tortuous action, arising + * out of or in connection with the use or performance of this + * software. + */ + +#include <X11/Xutil.h> +#ifndef WIN32 +#include <X11/Xproto.h> +#endif + +#ifndef _BLT_IMAGE_H +#define _BLT_IMAGE_H + +#define DIV255(i) ((((i) + 1) + (((i) + 1) >> 8) ) >> 8) + +#define GAMMA (1.0) + +/* + *---------------------------------------------------------------------- + * + * Pix32 -- + * + * A union representing either a pixel as a RGB triplet or a + * single word value. + * + *---------------------------------------------------------------------- + */ +typedef union { + unsigned int value; /* Lookup table address */ + struct RGBA { + unsigned char red; /* Red intensity 0..255 */ + unsigned char green; /* Green intensity 0.255 */ + unsigned char blue; /* Blue intensity 0..255 */ + unsigned char alpha; /* Alpha-channel for compositing. 0..255 */ + } rgba; + unsigned char channel[4]; +} Pix32; + +#define Red rgba.red +#define Blue rgba.blue +#define Green rgba.green +#define Alpha rgba.alpha + + +typedef struct { + XColor exact, best; + double error; + unsigned int freq; + int allocated; + int index; +} ColorInfo; + + +/* + *---------------------------------------------------------------------- + * + * ColorTable -- + * + * For colormap-ed visuals, this structure contains color lookup + * information needed to translate RGB triplets to pixel indices. + * + * This structure isn't needed for TrueColor or Monochrome visuals. + * + * DirectColor: + * Pixel values for each color channel + * StaticColor, PsuedoColor, StaticGray, and GrayScale: + * Red represents the 8-bit color. Green and Blue pixel + * values are unused. + * + *---------------------------------------------------------------------- + */ +typedef struct ColorTableStruct { + double outputGamma; /* Gamma correction value */ + Display *display; /* Display of colortable. Used to free + * colors allocated. */ + XVisualInfo visualInfo; /* Visual information for window displaying + * the image. */ + Colormap colorMap; /* Colormap used. This may be the default + * colormap, or an allocated private map. */ + int flags; + unsigned int red[256], green[256], blue[256]; + + /* Array of allocated pixels in colormap */ + ColorInfo colorInfo[256]; + ColorInfo *sortedColors[256]; + + int nUsedColors, nFreeColors; + int nPixels; /* Number of colors in the quantized image */ + unsigned long int pixelValues[256]; + + unsigned int *lut; /* Color lookup table. Used to collect + * frequencies of colors and later + * colormap indices */ +} *ColorTable; + +#define PRIVATE_COLORMAP 1 +#define RGBIndex(r,g,b) (((r)<<10) + ((r)<<6) + (r) + ((g) << 5) + (g) + (b)) + +/* + *---------------------------------------------------------------------- + * + * Blt_Colorimage -- + * + * The structure below represents a color image. Each pixel + * occupies a 32-bit word of memory: one byte for each of the + * red, green, and blue color intensities, and another for + * alpha-channel image compositing (e.g. transparency). + * + *---------------------------------------------------------------------- + */ +typedef struct Colorimage { + int width, height; /* Dimensions of the image */ + Pix32 *bits; /* Array of pixels representing the image. */ +} *Blt_Colorimage; + +/* + * Blt_Colorimage is supposed to be an opaque type. + * Use the macros below to access its members. + */ +#define Blt_ColorimageHeight(c) ((c)->height) +#define Blt_ColorimageWidth(c) ((c)->width) +#define Blt_ColorimageBits(c) ((c)->bits) +#define Blt_ColorimagePixel(c, x, y) ((c)->bits + ((c)->width * (y)) + (x)) + +/* + *---------------------------------------------------------------------- + * + * ResampleFilterProc -- + * + * A function implementing a 1-D filter. + * + *---------------------------------------------------------------------- + */ +typedef double (ResampleFilterProc) _ANSI_ARGS_((double value)); + +/* + *---------------------------------------------------------------------- + * + * ResampleFilter -- + * + * Contains information about a 1-D filter (its support and + * the procedure implementing the filter). + * + *---------------------------------------------------------------------- + */ +typedef struct { + char *name; /* Name of the filter */ + ResampleFilterProc *proc; /* 1-D filter procedure. */ + double support; /* Width of 1-D filter */ +} ResampleFilter; + +extern ResampleFilter *bltBoxFilterPtr; /* The ubiquitous box filter */ + + +/* + *---------------------------------------------------------------------- + * + * Filter2D -- + * + * Defines a convolution mask for a 2-D filter. Used to smooth or + * enhance images. + * + *---------------------------------------------------------------------- + */ +typedef struct { + double support; /* Radius of filter */ + double sum, scale; /* Sum of kernel */ + double *kernel; /* Array of values (malloc-ed) representing + * the discrete 2-D filter. */ +} Filter2D; + +/* Prototypes of image routines */ + +extern void Blt_ColorimageToGreyscale _ANSI_ARGS_((Blt_Colorimage image)); + +extern void Blt_ColorimageToPhoto _ANSI_ARGS_((Blt_Colorimage image, + Tk_PhotoHandle photo)); + +extern Pixmap Blt_ColorimageToPixmap _ANSI_ARGS_((Tcl_Interp *interp, + Tk_Window tkwin, Blt_Colorimage image, ColorTable *colorTablePtr)); + +extern Blt_Colorimage Blt_ConvolveColorimage _ANSI_ARGS_(( + Blt_Colorimage srcImage, Filter2D *filter)); + +extern Blt_Colorimage Blt_CreateColorimage _ANSI_ARGS_((int width,int height)); + +extern Blt_Colorimage Blt_DrawableToColorimage _ANSI_ARGS_((Tk_Window tkwin, + Drawable drawable, int x, int y, int width, int height, + double inputGamma)); + +extern int Blt_GetResampleFilter _ANSI_ARGS_((Tcl_Interp *interp, + char *filterName, ResampleFilter **filterPtrPtr)); + +extern void Blt_FreeColorimage _ANSI_ARGS_((Blt_Colorimage image)); + +#if HAVE_JPEG +extern Blt_Colorimage Blt_JPEGToColorimage _ANSI_ARGS_((Tcl_Interp *interp, + char *fileName)); +#endif + +extern Blt_Colorimage Blt_PhotoToColorimage _ANSI_ARGS_(( + Tk_PhotoHandle photo)); + +extern Blt_Colorimage Blt_PhotoRegionToColorimage _ANSI_ARGS_(( + Tk_PhotoHandle photo, int x, int y, int width, int height)); + +extern int Blt_QuantizeColorimage _ANSI_ARGS_((Blt_Colorimage src, + Blt_Colorimage dest, int nColors)); + +extern Blt_Colorimage Blt_ResampleColorimage _ANSI_ARGS_((Blt_Colorimage image, + int destWidth, int destHeight, ResampleFilter *horzFilterPtr, + ResampleFilter *vertFilterPtr)); + +extern void Blt_ResamplePhoto _ANSI_ARGS_((Tk_PhotoHandle srcPhoto, + int x, int y, int width, int height, Tk_PhotoHandle destPhoto, + ResampleFilter *horzFilterPtr, ResampleFilter *vertFilterPtr)); + +extern Blt_Colorimage Blt_ResizeColorimage _ANSI_ARGS_((Blt_Colorimage image, + int x, int y, int width, int height, int destWidth, int destHeight)); + +extern Blt_Colorimage Blt_RotateColorimage _ANSI_ARGS_((Blt_Colorimage image, + double theta)); + +extern void Blt_ResizePhoto _ANSI_ARGS_((Tk_PhotoHandle srcPhoto, int x, int y, + int width, int height, Tk_PhotoHandle destPhoto)); + +extern int Blt_SnapPhoto _ANSI_ARGS_((Tcl_Interp *interp, Tk_Window tkwin, + Drawable drawable, int x, int y, int width, int height, int destWidth, + int destHeight, char *photoName, double inputGamma)); + +extern void Blt_ImageRegion _ANSI_ARGS_((Blt_Colorimage image, + Region2D *regionPtr)); + +extern Region2D *Blt_ColorimageRegion _ANSI_ARGS_((Blt_Colorimage image, + Region2D *regionPtr)); + +extern Region2D *Blt_SetRegion _ANSI_ARGS_((int x, int y, int width, + int height, Region2D *regionPtr)); + +extern ColorTable Blt_CreateColorTable _ANSI_ARGS_((Tk_Window tkwin)); + +extern ColorTable Blt_DirectColorTable _ANSI_ARGS_((Tcl_Interp *interp, + Tk_Window tkwin, Blt_Colorimage image)); + +extern ColorTable Blt_PseudoColorTable _ANSI_ARGS_((Tcl_Interp *interp, + Tk_Window tkwin, Blt_Colorimage image)); + +extern void Blt_FreeColorTable _ANSI_ARGS_((ColorTable colorTable)); + +/* Missing routines from the Tk photo C API */ + +extern int Tk_ImageIsDeleted _ANSI_ARGS_((Tk_Image tkImage)); +extern Tk_ImageMaster Tk_ImageGetMaster _ANSI_ARGS_((Tk_Image tkImage)); +extern Tk_ImageType *Tk_ImageGetType _ANSI_ARGS_((Tk_Image tkImage)); +extern Pixmap Tk_ImageGetPhotoPixmap _ANSI_ARGS_((Tk_Image photoImage)); +extern GC Tk_ImageGetPhotoGC _ANSI_ARGS_((Tk_Image photoImage)); + +extern char *Blt_NameOfImage _ANSI_ARGS_((Tk_Image tkImage)); +extern Tk_Image Blt_CreateTemporaryImage _ANSI_ARGS_((Tcl_Interp *interp, + Tk_Window tkwin, ClientData clientData)); +extern int Blt_DestroyTemporaryImage _ANSI_ARGS_((Tcl_Interp *interp, + Tk_Image tkImage)); + +extern GC Blt_GetBitmapGC _ANSI_ARGS_((Tk_Window tkwin)); +extern Pixmap Blt_PhotoImageMask _ANSI_ARGS_((Tk_Window tkwin, + Tk_PhotoImageBlock src)); + +#endif /*_BLT_IMAGE_H*/ |