131 lines
2.9 KiB
C
131 lines
2.9 KiB
C
/*
|
||
* tkWinImage.c --
|
||
*
|
||
* This file contains routines for manipulation full-color images.
|
||
*
|
||
* Copyright (c) 1995 Sun Microsystems, Inc.
|
||
*
|
||
* See the file "license.terms" for information on usage and redistribution
|
||
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
||
*
|
||
* SCCS: @(#) tkWinImage.c 1.5 96/10/11 14:59:04
|
||
*/
|
||
|
||
#include "tkWinInt.h"
|
||
|
||
static int PutPixel _ANSI_ARGS_((XImage *image, int x, int y,
|
||
unsigned long pixel));
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* PutPixel --
|
||
*
|
||
* Set a single pixel in an image.
|
||
*
|
||
* Results:
|
||
* None.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
static int
|
||
PutPixel(image, x, y, pixel)
|
||
XImage *image;
|
||
int x, y;
|
||
unsigned long pixel;
|
||
{
|
||
char *destPtr = &(image->data[(y * image->bytes_per_line)
|
||
+ (x * (image->bits_per_pixel >> 3))]);
|
||
switch (image->bits_per_pixel) {
|
||
case 32:
|
||
destPtr[3] = 0;
|
||
case 24:
|
||
destPtr[0] = GetBValue(pixel);
|
||
destPtr[1] = GetGValue(pixel);
|
||
destPtr[2] = GetRValue(pixel);
|
||
break;
|
||
case 16:
|
||
destPtr[1] = (char) pixel>>8;
|
||
case 8:
|
||
destPtr[0] = (char) pixel;
|
||
break;
|
||
case 1: {
|
||
int offset = x%8;
|
||
if (pixel) {
|
||
destPtr[0] |= 1<< offset;
|
||
} else {
|
||
destPtr[0] & 0<< offset;
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
return 0;
|
||
}
|
||
|
||
/*
|
||
*----------------------------------------------------------------------
|
||
*
|
||
* XCreateImage --
|
||
*
|
||
* Allocates storage for a new XImage.
|
||
*
|
||
* Results:
|
||
* Returns a newly allocated XImage.
|
||
*
|
||
* Side effects:
|
||
* None.
|
||
*
|
||
*----------------------------------------------------------------------
|
||
*/
|
||
|
||
XImage *
|
||
XCreateImage(display, visual, depth, format, offset, data, width, height,
|
||
bitmap_pad, bytes_per_line)
|
||
Display* display;
|
||
Visual* visual;
|
||
unsigned int depth;
|
||
int format;
|
||
int offset;
|
||
char* data;
|
||
unsigned int width;
|
||
unsigned int height;
|
||
int bitmap_pad;
|
||
int bytes_per_line;
|
||
{
|
||
XImage* imagePtr = (XImage *) ckalloc(sizeof(XImage));
|
||
imagePtr->width = width;
|
||
imagePtr->height = height;
|
||
imagePtr->xoffset = offset;
|
||
imagePtr->format = format;
|
||
imagePtr->data = data;
|
||
imagePtr->byte_order = LSBFirst;
|
||
imagePtr->bitmap_unit = 32;
|
||
imagePtr->bitmap_bit_order = LSBFirst;
|
||
imagePtr->bitmap_pad = bitmap_pad;
|
||
imagePtr->depth = depth;
|
||
|
||
/*
|
||
* Round to the nearest word boundary.
|
||
*/
|
||
|
||
imagePtr->bytes_per_line = bytes_per_line ? bytes_per_line
|
||
: ((depth * width + 31) >> 3) & ~3;
|
||
|
||
imagePtr->bits_per_pixel = depth;
|
||
imagePtr->f.put_pixel = PutPixel;
|
||
imagePtr->red_mask = visual->red_mask;
|
||
imagePtr->green_mask = visual->green_mask;
|
||
imagePtr->blue_mask = visual->blue_mask;
|
||
imagePtr->f.create_image = NULL;
|
||
imagePtr->f.destroy_image = NULL;
|
||
imagePtr->f.get_pixel = NULL;
|
||
imagePtr->f.sub_image = NULL;
|
||
imagePtr->f.add_pixel = NULL;
|
||
|
||
return imagePtr;
|
||
}
|