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/*
* The Python Imaging Library.
* $Id: tkImaging.c,v 1.1 1996/05/09 22:11:39 fredrik Exp $
*
* TK interface for Python Imaging objects
*
* Copies (parts of) a named display memory to a photo image object.
* Also contains code to create an display memory. Under Tk, a
* display memory is simply an "L" or "RGB" image memory that is
* allocated in a single block.
*
* To use this module, add the following lines to your Tcl_AppInit
* function (in tkappinit.c). Put them after the calls to Tcl_Init
* and Tk_Init:
*
* {
* extern void TkImaging_Init(Tcl_Interp* interp);
* TkImaging_Init(interp);
* }
*
* This registers a Tcl command called "PyImagingPhoto", which
* is use to communicate between PIL and Tk's PhotoImage handler.
*
* Compile and link tkImaging.c with tkappinit.c and _tkinter
* (see the Setup file for details on how to use tkappinit.c).
* Note that _tkinter.c must be compiled with WITH_APPINIT.
*
* History:
* 1995-09-12 fl Created
* 1996-04-08 fl Ready for release
* 1997-05-09 fl Use command instead of image type
* 2001-03-18 fl Initialize alpha layer pointer (struct changed in 8.3)
* 2003-04-23 fl Fixed building for Tk 8.4.1 and later (Jack Jansen)
* 2004-06-24 fl Fixed building for Tk 8.4.6 and later.
*
* Copyright (c) 1997-2004 by Secret Labs AB
* Copyright (c) 1995-2004 by Fredrik Lundh
*
* See the README file for information on usage and redistribution.
*/
/* This is needed for (at least) Tk 8.4.1, otherwise the signature of
** Tk_PhotoPutBlock changes.
*/
#define USE_COMPOSITELESS_PHOTO_PUT_BLOCK
/* This is needed for (at least) Tk 8.4.6 and later, to avoid warnings
for the Tcl_CreateCommand command. */
#define USE_COMPAT_CONST
#include "tk.h"
#include "Imaging.h"
#include <stdlib.h>
static Imaging
ImagingFind(const char* name)
{
long id;
/* FIXME: use CObject instead? */
id = atol(name);
if (!id)
return NULL;
return (Imaging) id;
}
static int
PyImagingPhotoPut(ClientData clientdata, Tcl_Interp* interp,
int argc, char **argv)
{
Imaging im;
Tk_PhotoHandle photo;
Tk_PhotoImageBlock block;
if (argc != 3) {
Tcl_AppendResult(interp, "usage: ", argv[0],
" destPhoto srcImage", (char *) NULL);
return TCL_ERROR;
}
/* get Tcl PhotoImage handle */
photo = Tk_FindPhoto(interp, argv[1]);
if (photo == NULL) {
Tcl_AppendResult(
interp, "destination photo must exist", (char *) NULL
);
return TCL_ERROR;
}
/* get PIL Image handle */
im = ImagingFind(argv[2]);
if (!im) {
Tcl_AppendResult(interp, "bad name", (char*) NULL);
return TCL_ERROR;
}
if (!im->block) {
Tcl_AppendResult(interp, "bad display memory", (char*) NULL);
return TCL_ERROR;
}
/* Active region */
#if 0
if (src_xoffset + xsize > im->xsize)
xsize = im->xsize - src_xoffset;
if (src_yoffset + ysize > im->ysize)
ysize = im->ysize - src_yoffset;
if (xsize < 0 || ysize < 0
|| src_xoffset >= im->xsize
|| src_yoffset >= im->ysize)
return TCL_OK;
#endif
/* Mode */
if (strcmp(im->mode, "1") == 0 || strcmp(im->mode, "L") == 0) {
block.pixelSize = 1;
block.offset[0] = block.offset[1] = block.offset[2] = 0;
} else if (strncmp(im->mode, "RGB", 3) == 0) {
block.pixelSize = 4;
block.offset[0] = 0;
block.offset[1] = 1;
block.offset[2] = 2;
block.offset[3] = 0; /* no alpha (or reserved, under 8.2) */
} else {
Tcl_AppendResult(interp, "Bad mode", (char*) NULL);
return TCL_ERROR;
}
block.width = im->xsize;
block.height = im->ysize;
block.pitch = im->linesize;
block.pixelPtr = (unsigned char*) im->block;
#if 0
block.pixelPtr = (unsigned char*) im->block +
src_yoffset * im->linesize +
src_xoffset * im->pixelsize;
#endif
if (strcmp(im->mode, "RGBA") == 0) {
/* Copy non-transparent pixels to photo image */
int x, y;
Tk_PhotoImageBlock run;
/* Clear current contents */
Tk_PhotoBlank(photo);
/* Setup run descriptor */
run.height = 1;
run.pitch = block.pitch;
run.pixelSize = block.pixelSize;
run.offset[0] = 0;
run.offset[1] = 1;
run.offset[2] = 2;
run.offset[3] = 0; /* no alpha (or reserved, under 8.2) */
/* Copy opaque runs to photo image */
for (y = 0; y < block.height; y++) {
unsigned char* p = block.pixelPtr + y*block.pitch;
unsigned char* s = p;
int w = 0;
for (x = 0; x < block.width; x++) {
if (p[3]) {
/* opaque: add pixel to current run */
if (w == 0)
s = p;
w = w + 1;
} else if (s) {
/* copy run to photo image */
if (w > 0) {
run.width = w;
run.pixelPtr = s;
Tk_PhotoPutBlock(photo, &run, x-w, y, run.width, 1);
}
w = 0;
}
p += block.pixelSize;
}
if (w > 0) {
/* copy final run, if any */
run.width = w;
run.pixelPtr = s;
Tk_PhotoPutBlock(photo, &run, x-w, y, run.width, 1);
}
}
} else
/* Copy opaque block to photo image, and leave the rest to TK */
Tk_PhotoPutBlock(photo, &block, 0, 0, block.width, block.height);
return TCL_OK;
}
static int
PyImagingPhotoGet(ClientData clientdata, Tcl_Interp* interp,
int argc, char **argv)
{
Tk_PhotoHandle photo;
Tk_PhotoImageBlock block;
if (argc != 2) {
Tcl_AppendResult(interp, "usage: ", argv[0],
" srcPhoto", (char *) NULL);
return TCL_ERROR;
}
/* get Tcl PhotoImage handle */
photo = Tk_FindPhoto(interp, argv[1]);
if (photo == NULL) {
Tcl_AppendResult(
interp, "source photo must exist", (char *) NULL
);
return TCL_ERROR;
}
Tk_PhotoGetImage(photo, &block);
printf("pixelPtr = %p\n", block.pixelPtr);
printf("width = %d\n", block.width);
printf("height = %d\n", block.height);
printf("pitch = %d\n", block.pitch);
printf("pixelSize = %d\n", block.pixelSize);
printf("offset = %d %d %d %d\n", block.offset[0], block.offset[1],
block.offset[2], block.offset[3]);
Tcl_AppendResult(
interp, "this function is not yet support", (char *) NULL
);
return TCL_ERROR;
}
void
TkImaging_Init(Tcl_Interp* interp)
{
Tcl_CreateCommand(interp, "PyImagingPhoto", PyImagingPhotoPut,
(ClientData) 0, (Tcl_CmdDeleteProc*) NULL);
Tcl_CreateCommand(interp, "PyImagingPhotoGet", PyImagingPhotoGet,
(ClientData) 0, (Tcl_CmdDeleteProc*) NULL);
}
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