+++ /dev/null
-/* minirgb -- simple rgb buffer drawing library for 16, 24 and 32 bit displays
- * Copyright (C) 2000 timecop@japan.co.jp
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <X11/Xlib.h>
-#include <X11/Xutil.h>
-#include "minirgb.h"
-
-#undef MAX
-#define MAX(a, b) (((a) > (b)) ? (a) : (b))
-
-/* local variables */
-Display *minirgb_display; /* display */
-Visual *minirgb_visual; /* visual */
-int minirgb_depth; /* display depth */
-int minirgb_ok = 0; /* init ok? */
-
-/* local prototypes */
-static __inline void rgb_conv_16(unsigned char *ptr, unsigned char r, unsigned char g, unsigned char b, XImage *image);
-static __inline void rgb_conv_24(unsigned char *ptr, unsigned char r, unsigned char g, unsigned char b, XImage *image);
-static __inline void rgb_conv_32(unsigned char *ptr, unsigned char r, unsigned char g, unsigned char b, XImage *image);
-
-static __inline void rgb_conv_16(unsigned char *ptr, unsigned char r, unsigned char g, unsigned char b, XImage *image)
-{
- if (image->green_mask & 0x7e0) /* 565 */
- *(unsigned short int *)ptr = ((r >> 3) << 11) |
- ((g >> 2) << 5) |
- (b >> 3);
- else /* 555 untested */
- *(unsigned short int *)ptr = ((r >> 3) << 11) |
- ((g >> 3) << 6) |
- (b >> 3);
-}
-
-static __inline void rgb_conv_24(unsigned char *ptr, unsigned char r, unsigned char g, unsigned char b, XImage *image)
-{
- /* untested */
- *ptr++ = r;
- *ptr++ = g;
- *ptr = b;
-}
-
-static __inline void rgb_conv_32(unsigned char *ptr, unsigned char r, unsigned char g, unsigned char b, XImage *image)
-{
- if (image->red_mask & 0xff0000) /* 0888 */
- *(unsigned int *)ptr = (r << 16) |
- (g << 8) |
- (b);
- else /* 8880 untested */
- *(unsigned int *)ptr = (r << 24) |
- (g << 16) |
- (b << 8);
-}
-
-int minirgb_init(Display *d)
-{
- int screen;
-
- minirgb_display = d;
- screen = DefaultScreen(minirgb_display);
- minirgb_visual = XDefaultVisual(minirgb_display, screen);
- minirgb_depth = XDefaultDepth(minirgb_display, screen);
- if (minirgb_depth <= 8) {
- fprintf(stderr, "minirgb: No support for 8 bit displays\n");
- minirgb_ok = 0;
- return 1;
- } else {
- minirgb_ok = 1;
- return 0;
- }
-}
-
-void minirgb_setpixel(MiniRGB *rgb_image, unsigned char *color, unsigned int x, unsigned int y)
-{
- unsigned char *ptr;
-
- ptr = rgb_image->mem + (y * rgb_image->rowstride * 3) + (x * 3);
- *ptr++ = *color++;
- *ptr++ = *color++;
- *ptr = *color;
-}
-
-void minirgb_copy(MiniRGB *from, MiniRGB *to,
- unsigned int sx, unsigned int sy, unsigned int w, unsigned int h,
- unsigned int dx, unsigned int dy)
-{
- unsigned int i;
- unsigned char *src, *dest;
-
-#ifdef VERBOSE
- fprintf(stderr, "minirgb: copy %d, %d (%dx%d) -> %d, %d)\n", sx, sy, w, h, dx, dy);
-#endif
-
-#if 0
- if (w == 1) { /* special case - dot operations */
- src = from->mem + (sy * from->rowstride * 3) + sx * 3;
- dest = to->mem + (dy * to->rowstride * 3) + dx * 3;
- dest[0] = dest[0] & src[0];
- dest[1] = dest[1] & src[1];
- dest[2] = dest[2] & src[2];
- return;
- }
-#endif
-
- for (i = 0; i < h; i++) {
- src = from->mem + ((sy + i) * from->rowstride * 3) + sx * 3;
- dest = to->mem + ((dy + i) * to->rowstride * 3) + dx * 3;
- memcpy(dest, src, w * 3);
- }
-}
-
-void minirgb_new(MiniRGB *image, unsigned int width, unsigned int height)
-{
- image->width = width;
- image->height = height;
- image->rowstride = width;
- image->mem = calloc(1, width * height * 3);
-}
-
-void minirgb_draw(Window drawable, GC gc, int x, int y, int width,
- int height, MiniRGB *rgb_image)
-{
- XImage *image = NULL;
- unsigned int bpp;
- unsigned int x0, y0;
- unsigned char *ptr, *col;
- void (*conv) (unsigned char *, unsigned char, unsigned char, unsigned char, XImage *) = NULL;
-
- if (!minirgb_ok)
- return;
-
- image = XCreateImage(minirgb_display, minirgb_visual, minirgb_depth, ZPixmap, 0, 0, width, height, 32, 0);
- bpp = (image->bits_per_pixel + 7) / 8;
- switch (bpp) {
- case 2:
- conv = rgb_conv_16;
- break;
- case 3:
- conv = rgb_conv_24;
- break;
- case 4:
- conv = rgb_conv_32;
- break;
- }
-#ifdef VERBOSE
- printf("minirgb: image %p %dx%d (bpp: %d, bpl: %d)\n", image, width, height, bpp, image->bytes_per_line);
-#endif
- image->data = malloc(image->bytes_per_line * height);
- if (!image->data) {
- fprintf(stderr, "minirgb: allocation error\n");
- XDestroyImage(image);
- return;
- }
-
- for (y0 = 0; y0 < height; y0++) {
- for (x0 = 0; x0 < width; x0++) {
- col = rgb_image->mem + (y0 * rgb_image->rowstride * 3 + x0 * 3);
- ptr = image->data + (y0 * image->bytes_per_line + x0 * bpp);
- conv(ptr, col[0], col[1], col[2], image);
- }
- }
- /* draw image onto drawable */
- XPutImage(minirgb_display, drawable, gc, image, 0, 0, x, y, width, height);
- XDestroyImage(image);
-}
projects / my-code / ivac.git / blobdiff