/[dtapublic]/to_be_filed/sf_code/esrgpcpj/shared/tk_base/tkwinimage.c
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1 dashley 25 /* $Header: /cvsroot/esrg/sfesrg/esrgpcpj/shared/tk_base/tkwinimage.c,v 1.1.1.1 2001/06/13 05:13:34 dtashley Exp $ */
2    
3     /*
4     * tkWinImage.c --
5     *
6     * This file contains routines for manipulation full-color images.
7     *
8     * Copyright (c) 1995 Sun Microsystems, Inc.
9     *
10     * See the file "license.terms" for information on usage and redistribution
11     * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
12     *
13     * RCS: @(#) $Id: tkwinimage.c,v 1.1.1.1 2001/06/13 05:13:34 dtashley Exp $
14     */
15    
16     #include "tkWinInt.h"
17    
18     static int DestroyImage _ANSI_ARGS_((XImage* data));
19     static unsigned long ImageGetPixel _ANSI_ARGS_((XImage *image, int x, int y));
20     static int PutPixel _ANSI_ARGS_((XImage *image, int x, int y,
21     unsigned long pixel));
22    
23     /*
24     *----------------------------------------------------------------------
25     *
26     * DestroyImage --
27     *
28     * This is a trivial wrapper around ckfree to make it possible to
29     * pass ckfree as a pointer.
30     *
31     * Results:
32     * None.
33     *
34     * Side effects:
35     * Deallocates the image.
36     *
37     *----------------------------------------------------------------------
38     */
39    
40     static int
41     DestroyImage(imagePtr)
42     XImage *imagePtr; /* image to free */
43     {
44     if (imagePtr) {
45     if (imagePtr->data) {
46     ckfree((char*)imagePtr->data);
47     }
48     ckfree((char*)imagePtr);
49     }
50     return 0;
51     }
52    
53     /*
54     *----------------------------------------------------------------------
55     *
56     * ImageGetPixel --
57     *
58     * Get a single pixel from an image.
59     *
60     * Results:
61     * Returns the 32 bit pixel value.
62     *
63     * Side effects:
64     * None.
65     *
66     *----------------------------------------------------------------------
67     */
68    
69     static unsigned long
70     ImageGetPixel(image, x, y)
71     XImage *image;
72     int x, y;
73     {
74     unsigned long pixel = 0;
75     unsigned char *srcPtr = &(image->data[(y * image->bytes_per_line)
76     + ((x * image->bits_per_pixel) / NBBY)]);
77    
78     switch (image->bits_per_pixel) {
79     case 32:
80     case 24:
81     pixel = RGB(srcPtr[2], srcPtr[1], srcPtr[0]);
82     break;
83     case 16:
84     pixel = RGB(((((WORD*)srcPtr)[0]) >> 7) & 0xf8,
85     ((((WORD*)srcPtr)[0]) >> 2) & 0xf8,
86     ((((WORD*)srcPtr)[0]) << 3) & 0xf8);
87     break;
88     case 8:
89     pixel = srcPtr[0];
90     break;
91     case 4:
92     pixel = ((x%2) ? (*srcPtr) : ((*srcPtr) >> 4)) & 0x0f;
93     break;
94     case 1:
95     pixel = ((*srcPtr) & (0x80 >> (x%8))) ? 1 : 0;
96     break;
97     }
98     return pixel;
99     }
100    
101     /*
102     *----------------------------------------------------------------------
103     *
104     * PutPixel --
105     *
106     * Set a single pixel in an image.
107     *
108     * Results:
109     * None.
110     *
111     * Side effects:
112     * None.
113     *
114     *----------------------------------------------------------------------
115     */
116    
117     static int
118     PutPixel(image, x, y, pixel)
119     XImage *image;
120     int x, y;
121     unsigned long pixel;
122     {
123     unsigned char *destPtr = &(image->data[(y * image->bytes_per_line)
124     + ((x * image->bits_per_pixel) / NBBY)]);
125    
126     switch (image->bits_per_pixel) {
127     case 32:
128     /*
129     * Pixel is DWORD: 0x00BBGGRR
130     */
131    
132     destPtr[3] = 0;
133     case 24:
134     /*
135     * Pixel is triplet: 0xBBGGRR.
136     */
137    
138     destPtr[0] = (unsigned char) GetBValue(pixel);
139     destPtr[1] = (unsigned char) GetGValue(pixel);
140     destPtr[2] = (unsigned char) GetRValue(pixel);
141     break;
142     case 16:
143     /*
144     * Pixel is WORD: 5-5-5 (R-G-B)
145     */
146    
147     (*(WORD*)destPtr) =
148     ((GetRValue(pixel) & 0xf8) << 7)
149     | ((GetGValue(pixel) & 0xf8) <<2)
150     | ((GetBValue(pixel) & 0xf8) >> 3);
151     break;
152     case 8:
153     /*
154     * Pixel is 8-bit index into color table.
155     */
156    
157     (*destPtr) = (unsigned char) pixel;
158     break;
159     case 4:
160     /*
161     * Pixel is 4-bit index in MSBFirst order.
162     */
163     if (x%2) {
164     (*destPtr) = (unsigned char) (((*destPtr) & 0xf0)
165     | (pixel & 0x0f));
166     } else {
167     (*destPtr) = (unsigned char) (((*destPtr) & 0x0f)
168     | ((pixel << 4) & 0xf0));
169     }
170     break;
171     case 1: {
172     /*
173     * Pixel is bit in MSBFirst order.
174     */
175    
176     int mask = (0x80 >> (x%8));
177     if (pixel) {
178     (*destPtr) |= mask;
179     } else {
180     (*destPtr) &= ~mask;
181     }
182     }
183     break;
184     }
185     return 0;
186     }
187    
188     /*
189     *----------------------------------------------------------------------
190     *
191     * XCreateImage --
192     *
193     * Allocates storage for a new XImage.
194     *
195     * Results:
196     * Returns a newly allocated XImage.
197     *
198     * Side effects:
199     * None.
200     *
201     *----------------------------------------------------------------------
202     */
203    
204     XImage *
205     XCreateImage(display, visual, depth, format, offset, data, width, height,
206     bitmap_pad, bytes_per_line)
207     Display* display;
208     Visual* visual;
209     unsigned int depth;
210     int format;
211     int offset;
212     char* data;
213     unsigned int width;
214     unsigned int height;
215     int bitmap_pad;
216     int bytes_per_line;
217     {
218     XImage* imagePtr = (XImage *) ckalloc(sizeof(XImage));
219     imagePtr->width = width;
220     imagePtr->height = height;
221     imagePtr->xoffset = offset;
222     imagePtr->format = format;
223     imagePtr->data = data;
224     imagePtr->byte_order = LSBFirst;
225     imagePtr->bitmap_unit = 8;
226     imagePtr->bitmap_bit_order = MSBFirst;
227     imagePtr->bitmap_pad = bitmap_pad;
228     imagePtr->bits_per_pixel = depth;
229     imagePtr->depth = depth;
230    
231     /*
232     * Under Windows, bitmap_pad must be on an LONG data-type boundary.
233     */
234    
235     #define LONGBITS (sizeof(LONG) * 8)
236    
237     bitmap_pad = (bitmap_pad + LONGBITS - 1) / LONGBITS * LONGBITS;
238    
239     /*
240     * Round to the nearest bitmap_pad boundary.
241     */
242    
243     if (bytes_per_line) {
244     imagePtr->bytes_per_line = bytes_per_line;
245     } else {
246     imagePtr->bytes_per_line = (((depth * width)
247     + (bitmap_pad - 1)) >> 3) & ~((bitmap_pad >> 3) - 1);
248     }
249    
250     imagePtr->red_mask = 0;
251     imagePtr->green_mask = 0;
252     imagePtr->blue_mask = 0;
253    
254     imagePtr->f.put_pixel = PutPixel;
255     imagePtr->f.get_pixel = ImageGetPixel;
256     imagePtr->f.destroy_image = DestroyImage;
257     imagePtr->f.create_image = NULL;
258     imagePtr->f.sub_image = NULL;
259     imagePtr->f.add_pixel = NULL;
260    
261     return imagePtr;
262     }
263    
264     /*
265     *----------------------------------------------------------------------
266     *
267     * XGetImage --
268     *
269     * This function copies data from a pixmap or window into an
270     * XImage.
271     *
272     * Results:
273     * Returns a newly allocated image containing the data from the
274     * given rectangle of the given drawable.
275     *
276     * Side effects:
277     * None.
278     *
279     *----------------------------------------------------------------------
280     */
281    
282     XImage *
283     XGetImage(display, d, x, y, width, height, plane_mask, format)
284     Display* display;
285     Drawable d;
286     int x;
287     int y;
288     unsigned int width;
289     unsigned int height;
290     unsigned long plane_mask;
291     int format;
292     {
293     TkWinDrawable *twdPtr = (TkWinDrawable *)d;
294     XImage *imagePtr;
295     HDC dc;
296     char infoBuf[sizeof(BITMAPINFO) + sizeof(RGBQUAD)];
297     BITMAPINFO *infoPtr = (BITMAPINFO*)infoBuf;
298    
299     if ((twdPtr->type != TWD_BITMAP) || (twdPtr->bitmap.handle == NULL)
300     || (format != XYPixmap) || (plane_mask != 1)) {
301     panic("XGetImage: not implemented");
302     }
303    
304    
305     imagePtr = XCreateImage(display, NULL, 1, XYBitmap, 0, NULL,
306     width, height, 32, 0);
307     imagePtr->data = ckalloc(imagePtr->bytes_per_line * imagePtr->height);
308    
309     dc = GetDC(NULL);
310    
311     GetDIBits(dc, twdPtr->bitmap.handle, 0, height, NULL,
312     infoPtr, DIB_RGB_COLORS);
313    
314     infoPtr->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
315     infoPtr->bmiHeader.biWidth = width;
316     infoPtr->bmiHeader.biHeight = -(LONG)height;
317     infoPtr->bmiHeader.biPlanes = 1;
318     infoPtr->bmiHeader.biBitCount = 1;
319     infoPtr->bmiHeader.biCompression = BI_RGB;
320     infoPtr->bmiHeader.biCompression = 0;
321     infoPtr->bmiHeader.biXPelsPerMeter = 0;
322     infoPtr->bmiHeader.biYPelsPerMeter = 0;
323     infoPtr->bmiHeader.biClrUsed = 0;
324     infoPtr->bmiHeader.biClrImportant = 0;
325    
326     GetDIBits(dc, twdPtr->bitmap.handle, 0, height, imagePtr->data,
327     infoPtr, DIB_RGB_COLORS);
328     ReleaseDC(NULL, dc);
329    
330     return imagePtr;
331     }
332    
333    
334     /* $History: tkWinImage.c $
335     *
336     * ***************** Version 1 *****************
337     * User: Dtashley Date: 1/02/01 Time: 3:15a
338     * Created in $/IjuScripter, IjuConsole/Source/Tk Base
339     * Initial check-in.
340     */
341    
342     /* End of TKWINIMAGE.C */

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