698 lines
13 KiB
C
698 lines
13 KiB
C
/*
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* Blit RGBA images to X with X(Shm)Images
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*/
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#ifndef _XOPEN_SOURCE
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# define _XOPEN_SOURCE 1
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#endif
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#ifndef _XOPEN_SOURCE
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# define _XOPEN_SOURCE 1
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#endif
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#define noSHOWINFO
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#include "fitz.h"
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#include <X11/Xlib.h>
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#include <X11/Xutil.h>
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#include <sys/ipc.h>
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#include <sys/shm.h>
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#include <X11/extensions/XShm.h>
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extern int ffs(int);
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typedef void (*ximage_convert_func_t)
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(
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const unsigned char *src,
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int srcstride,
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unsigned char *dst,
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int dststride,
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int w,
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int h
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);
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#define POOLSIZE 4
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#define WIDTH 256
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#define HEIGHT 256
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enum {
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ARGB8888,
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BGRA8888,
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RGBA8888,
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ABGR8888,
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RGB888,
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BGR888,
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RGB565,
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RGB565_BR,
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RGB555,
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RGB555_BR,
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BGR233,
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UNKNOWN
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};
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#ifdef SHOWINFO
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static char *modename[] = {
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"ARGB8888",
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"BGRA8888",
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"RGBA8888",
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"ABGR8888",
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"RGB888",
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"BGR888",
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"RGB565",
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"RGB565_BR",
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"RGB555",
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"RGB555_BR",
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"BGR233",
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"UNKNOWN"
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};
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#endif
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extern ximage_convert_func_t ximage_convert_funcs[];
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static struct
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{
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Display *display;
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int screen;
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XVisualInfo visual;
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Colormap colormap;
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int bitsperpixel;
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int mode;
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XColor rgbcube[256];
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ximage_convert_func_t convert_func;
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int useshm;
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int shmcode;
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XImage *pool[POOLSIZE];
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/* MUST exist during the lifetime of the shared ximage according to the
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xc/doc/hardcopy/Xext/mit-shm.PS.gz */
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XShmSegmentInfo shminfo[POOLSIZE];
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int lastused;
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} info;
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static XImage *
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createximage(Display *dpy, Visual *vis, XShmSegmentInfo *xsi, int depth, int w, int h)
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{
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XImage *img;
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Status status;
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if (!XShmQueryExtension(dpy))
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goto fallback;
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if (!info.useshm)
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goto fallback;
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img = XShmCreateImage(dpy, vis, depth, ZPixmap, NULL, xsi, w, h);
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if (!img)
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{
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fprintf(stderr, "warn: could not XShmCreateImage\n");
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goto fallback;
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}
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xsi->shmid = shmget(IPC_PRIVATE,
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img->bytes_per_line * img->height,
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IPC_CREAT | 0777);
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if (xsi->shmid < 0)
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{
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XDestroyImage(img);
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fprintf(stderr, "warn: could not shmget\n");
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goto fallback;
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}
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img->data = xsi->shmaddr = shmat(xsi->shmid, NULL, 0);
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if (img->data == (char*)-1)
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{
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XDestroyImage(img);
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fprintf(stderr, "warn: could not shmat\n");
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goto fallback;
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}
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xsi->readOnly = False;
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status = XShmAttach(dpy, xsi);
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if (!status)
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{
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shmdt(xsi->shmaddr);
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XDestroyImage(img);
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fprintf(stderr, "warn: could not XShmAttach\n");
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goto fallback;
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}
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XSync(dpy, False);
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shmctl(xsi->shmid, IPC_RMID, NULL);
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return img;
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fallback:
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info.useshm = 0;
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img = XCreateImage(dpy, vis, depth, ZPixmap, 0, NULL, w, h, 32, 0);
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if (!img)
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{
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fprintf(stderr, "fail: could not XCreateImage");
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abort();
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}
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img->data = malloc(h * img->bytes_per_line);
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if (!img->data)
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{
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fprintf(stderr, "fail: could not malloc");
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abort();
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}
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return img;
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}
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static void
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make_colormap(void)
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{
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if (info.visual.class == PseudoColor && info.visual.depth == 8)
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{
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int i, r, g, b;
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i = 0;
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for (b = 0; b < 4; b++) {
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for (g = 0; g < 8; g++) {
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for (r = 0; r < 8; r++) {
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info.rgbcube[i].pixel = i;
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info.rgbcube[i].red = (r * 36) << 8;
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info.rgbcube[i].green = (g * 36) << 8;
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info.rgbcube[i].blue = (b * 85) << 8;
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info.rgbcube[i].flags =
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DoRed | DoGreen | DoBlue;
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i++;
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}
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}
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}
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info.colormap = XCreateColormap(info.display,
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RootWindow(info.display, info.screen),
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info.visual.visual,
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AllocAll);
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XStoreColors(info.display, info.colormap, info.rgbcube, 256);
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return;
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}
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else if (info.visual.class == TrueColor)
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{
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info.colormap = 0;
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return;
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}
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fprintf(stderr, "Cannot handle visual class %d with depth: %d\n",
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info.visual.class, info.visual.depth);
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return;
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}
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static void
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select_mode(void)
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{
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int byteorder;
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int byterev;
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unsigned long rm, gm, bm;
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unsigned long rs, gs, bs;
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byteorder = ImageByteOrder(info.display);
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if (fz_is_big_endian())
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byterev = byteorder != MSBFirst;
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else
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byterev = byteorder != LSBFirst;
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rm = info.visual.red_mask;
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gm = info.visual.green_mask;
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bm = info.visual.blue_mask;
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rs = ffs(rm) - 1;
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gs = ffs(gm) - 1;
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bs = ffs(bm) - 1;
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#ifdef SHOWINFO
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printf("ximage: mode %d/%d %08lx %08lx %08lx (%ld,%ld,%ld) %s%s\n",
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info.visual.depth,
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info.bitsperpixel,
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rm, gm, bm, rs, gs, bs,
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byteorder == MSBFirst ? "msb" : "lsb",
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byterev ? " <swap>":"");
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#endif
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info.mode = UNKNOWN;
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if (info.bitsperpixel == 8) {
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/* Either PseudoColor with BGR233 colormap, or TrueColor */
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info.mode = BGR233;
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}
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else if (info.bitsperpixel == 16) {
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if (rm == 0xF800 && gm == 0x07E0 && bm == 0x001F)
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info.mode = !byterev ? RGB565 : RGB565_BR;
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if (rm == 0x7C00 && gm == 0x03E0 && bm == 0x001F)
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info.mode = !byterev ? RGB555 : RGB555_BR;
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}
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else if (info.bitsperpixel == 24) {
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if (rs == 0 && gs == 8 && bs == 16)
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info.mode = byteorder == MSBFirst ? RGB888 : BGR888;
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if (rs == 16 && gs == 8 && bs == 0)
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info.mode = byteorder == MSBFirst ? BGR888 : RGB888;
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}
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else if (info.bitsperpixel == 32) {
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if (rs == 0 && gs == 8 && bs == 16)
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info.mode = byteorder == MSBFirst ? ABGR8888 : RGBA8888;
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if (rs == 8 && gs == 16 && bs == 24)
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info.mode = byteorder == MSBFirst ? BGRA8888 : ARGB8888;
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if (rs == 16 && gs == 8 && bs == 0)
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info.mode = byteorder == MSBFirst ? ARGB8888 : BGRA8888;
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if (rs == 24 && gs == 16 && bs == 8)
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info.mode = byteorder == MSBFirst ? RGBA8888 : ABGR8888;
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}
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#ifdef SHOWINFO
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printf("ximage: RGBA8888 to %s\n", modename[info.mode]);
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#endif
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/* select conversion function */
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info.convert_func = ximage_convert_funcs[info.mode];
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}
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static int
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create_pool(void)
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{
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int i;
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info.lastused = 0;
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for (i = 0; i < POOLSIZE; i++) {
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info.pool[i] = NULL;
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}
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for (i = 0; i < POOLSIZE; i++) {
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info.pool[i] = createximage(info.display,
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info.visual.visual, &info.shminfo[i], info.visual.depth,
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WIDTH, HEIGHT);
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if (info.pool[i] == NULL) {
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return 0;
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}
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}
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return 1;
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}
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static XImage *
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next_pool_image(void)
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{
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if (info.lastused + 1 >= POOLSIZE) {
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if (info.useshm)
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XSync(info.display, False);
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else
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XFlush(info.display);
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info.lastused = 0;
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}
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return info.pool[info.lastused ++];
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}
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static int
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ximage_error_handler(Display *display, XErrorEvent *event)
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{
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/* Turn off shared memory images if we get an error from the MIT-SHM extension */
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if (event->request_code == info.shmcode)
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{
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char buf[80];
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XGetErrorText(display, event->error_code, buf, sizeof buf);
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fprintf(stderr, "ximage: disabling shared memory extension: %s\n", buf);
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info.useshm = 0;
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return 0;
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}
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XSetErrorHandler(NULL);
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return (XSetErrorHandler(ximage_error_handler))(display, event);
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}
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int
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ximage_init(Display *display, int screen, Visual *visual)
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{
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XVisualInfo template;
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XVisualInfo *visuals;
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int nvisuals;
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XPixmapFormatValues *formats;
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int nformats;
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int ok;
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int i;
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int major;
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int event;
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int error;
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info.display = display;
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info.screen = screen;
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info.colormap = 0;
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/* Get XVisualInfo for this visual */
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template.visualid = XVisualIDFromVisual(visual);
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visuals = XGetVisualInfo(display, VisualIDMask, &template, &nvisuals);
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if (nvisuals != 1) {
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fprintf(stderr, "Visual not found!\n");
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XFree(visuals);
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return 0;
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}
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memcpy(&info.visual, visuals, sizeof (XVisualInfo));
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XFree(visuals);
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/* Get appropriate PixmapFormat for this visual */
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formats = XListPixmapFormats(info.display, &nformats);
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for (i = 0; i < nformats; i++) {
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if (formats[i].depth == info.visual.depth) {
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info.bitsperpixel = formats[i].bits_per_pixel;
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break;
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}
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}
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XFree(formats);
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if (i == nformats) {
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fprintf(stderr, "PixmapFormat not found!\n");
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return 0;
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}
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/* extract mode */
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select_mode();
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/* prepare colormap */
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make_colormap();
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/* identify code for MIT-SHM extension */
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if (XQueryExtension(display, "MIT-SHM", &major, &event, &error) &&
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XShmQueryExtension(display))
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info.shmcode = major;
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/* intercept errors looking for SHM code */
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XSetErrorHandler(ximage_error_handler);
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/* prepare pool of XImages */
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info.useshm = 1;
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ok = create_pool();
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if (!ok)
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return 0;
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#ifdef SHOWINFO
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printf("ximage: %sPutImage\n", info.useshm ? "XShm" : "X");
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#endif
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return 1;
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}
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int
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ximage_get_depth(void)
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{
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return info.visual.depth;
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}
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Visual *
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ximage_get_visual(void)
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{
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return info.visual.visual;
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}
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Colormap
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ximage_get_colormap(void)
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{
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return info.colormap;
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}
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void
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ximage_blit(Drawable d, GC gc,
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int dstx, int dsty,
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unsigned char *srcdata,
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int srcx, int srcy,
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int srcw, int srch,
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int srcstride)
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{
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XImage *image;
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int ax, ay;
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int w, h;
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unsigned char *srcptr;
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for (ay = 0; ay < srch; ay += HEIGHT)
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{
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h = MIN(srch - ay, HEIGHT);
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for (ax = 0; ax < srcw; ax += WIDTH)
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{
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w = MIN(srcw - ax, WIDTH);
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image = next_pool_image();
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srcptr = srcdata +
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(ay + srcy) * srcstride +
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(ax + srcx) * 4;
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info.convert_func(srcptr, srcstride,
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(unsigned char *) image->data,
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image->bytes_per_line, w, h);
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if (info.useshm)
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{
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XShmPutImage(info.display, d, gc, image,
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0, 0, dstx + ax, dsty + ay,
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w, h, False);
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}
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else
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{
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XPutImage(info.display, d, gc, image,
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0, 0,
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dstx + ax,
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dsty + ay,
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w, h);
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}
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}
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}
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}
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/*
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* Primitive conversion functions
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*/
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#ifndef restrict
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#ifndef _C99
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#ifdef __GNUC__
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#define restrict __restrict__
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#else
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#define restrict
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#endif
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#endif
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#endif
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#define PARAMS \
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const unsigned char * restrict src, \
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int srcstride, \
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unsigned char * restrict dst, \
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int dststride, \
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int w, \
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int h
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/*
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* Convert byte:RGBA8888 to various formats
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*/
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static void
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ximage_convert_argb8888(PARAMS)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x ++) {
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dst[x * 4 + 0] = src[x * 4 + 3]; /* a */
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dst[x * 4 + 1] = src[x * 4 + 0]; /* r */
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dst[x * 4 + 2] = src[x * 4 + 1]; /* g */
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dst[x * 4 + 3] = src[x * 4 + 2]; /* b */
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}
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dst += dststride;
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src += srcstride;
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}
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}
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static void
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ximage_convert_bgra8888(PARAMS)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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dst[x * 4 + 0] = src[x * 4 + 2];
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dst[x * 4 + 1] = src[x * 4 + 1];
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dst[x * 4 + 2] = src[x * 4 + 0];
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dst[x * 4 + 3] = src[x * 4 + 3];
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}
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dst += dststride;
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src += srcstride;
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}
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}
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static void
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ximage_convert_abgr8888(PARAMS)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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dst[x * 4 + 0] = src[x * 4 + 3];
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dst[x * 4 + 1] = src[x * 4 + 2];
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dst[x * 4 + 2] = src[x * 4 + 1];
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dst[x * 4 + 3] = src[x * 4 + 0];
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}
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dst += dststride;
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src += srcstride;
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}
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}
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static void
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ximage_convert_rgba8888(PARAMS)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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dst[x] = src[x];
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}
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dst += dststride;
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src += srcstride;
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}
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}
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static void
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ximage_convert_bgr888(PARAMS)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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dst[3*x + 0] = src[4*x + 2];
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dst[3*x + 1] = src[4*x + 1];
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dst[3*x + 2] = src[4*x + 0];
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}
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src += srcstride;
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dst += dststride;
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}
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}
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static void
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ximage_convert_rgb888(PARAMS)
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{
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int x, y;
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for (y = 0; y < h; y++) {
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for (x = 0; x < w; x++) {
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dst[3*x + 0] = src[4*x + 0];
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dst[3*x + 1] = src[4*x + 1];
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|
dst[3*x + 2] = src[4*x + 2];
|
|
}
|
|
src += srcstride;
|
|
dst += dststride;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ximage_convert_rgb565(PARAMS)
|
|
{
|
|
unsigned char r, g, b;
|
|
int x, y;
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++) {
|
|
r = src[4*x + 0];
|
|
g = src[4*x + 1];
|
|
b = src[4*x + 2];
|
|
((unsigned short *)dst)[x] =
|
|
((r & 0xF8) << 8) |
|
|
((g & 0xFC) << 3) |
|
|
(b >> 3);
|
|
}
|
|
src += srcstride;
|
|
dst += dststride;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ximage_convert_rgb565_br(PARAMS)
|
|
{
|
|
unsigned char r, g, b;
|
|
int x, y;
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++) {
|
|
r = src[4*x + 0];
|
|
g = src[4*x + 1];
|
|
b = src[4*x + 2];
|
|
/* final word is:
|
|
g4 g3 g2 b7 b6 b5 b4 b3 : r7 r6 r5 r4 r3 g7 g6 g5
|
|
*/
|
|
((unsigned short *)dst)[x] =
|
|
(r & 0xF8) |
|
|
((g & 0xE0) >> 5) |
|
|
((g & 0x1C) << 11) |
|
|
((b & 0xF8) << 5);
|
|
}
|
|
src += srcstride;
|
|
dst += dststride;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ximage_convert_rgb555(PARAMS)
|
|
{
|
|
unsigned char r, g, b;
|
|
int x, y;
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++) {
|
|
r = src[4*x + 0];
|
|
g = src[4*x + 1];
|
|
b = src[4*x + 2];
|
|
((unsigned short *)dst)[x] =
|
|
((r & 0xF8) << 7) |
|
|
((g & 0xF8) << 2) |
|
|
(b >> 3);
|
|
}
|
|
src += srcstride;
|
|
dst += dststride;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ximage_convert_rgb555_br(PARAMS)
|
|
{
|
|
unsigned char r, g, b;
|
|
int x, y;
|
|
for (y = 0; y < h; y++) {
|
|
for (x = 0; x < w; x++) {
|
|
r = src[4*x + 0];
|
|
g = src[4*x + 1];
|
|
b = src[4*x + 2];
|
|
/* final word is:
|
|
g5 g4 g3 b7 b6 b5 b4 b3 : 0 r7 r6 r5 r4 r3 g7 g6
|
|
*/
|
|
((unsigned short *)dst)[x] =
|
|
((r & 0xF8) >> 1) |
|
|
((g & 0xC0) >> 6) |
|
|
((g & 0x38) << 10) |
|
|
((b & 0xF8) << 5);
|
|
}
|
|
src += srcstride;
|
|
dst += dststride;
|
|
}
|
|
}
|
|
|
|
static void
|
|
ximage_convert_bgr233(PARAMS)
|
|
{
|
|
unsigned char r, g, b;
|
|
int x,y;
|
|
for(y = 0; y < h; y++) {
|
|
for(x = 0; x < w; x++) {
|
|
r = src[4*x + 0];
|
|
g = src[4*x + 1];
|
|
b = src[4*x + 2];
|
|
/* format: b7 b6 g7 g6 g5 r7 r6 r5 */
|
|
dst[x] = (b&0xC0) | ((g>>2)&0x38) | ((r>>5)&0x7);
|
|
}
|
|
src += srcstride;
|
|
dst += dststride;
|
|
}
|
|
}
|
|
|
|
ximage_convert_func_t ximage_convert_funcs[] = {
|
|
ximage_convert_argb8888,
|
|
ximage_convert_bgra8888,
|
|
ximage_convert_rgba8888,
|
|
ximage_convert_abgr8888,
|
|
ximage_convert_rgb888,
|
|
ximage_convert_bgr888,
|
|
ximage_convert_rgb565,
|
|
ximage_convert_rgb565_br,
|
|
ximage_convert_rgb555,
|
|
ximage_convert_rgb555_br,
|
|
ximage_convert_bgr233,
|
|
};
|