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