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#include "yagl_bimage.h"
#include "yagl_log.h"
#include "yagl_malloc.h"
#include "yagl_display.h"
#include "yagl_mem.h"
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/time.h>
#include <sys/mman.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
struct yagl_bimage *yagl_bimage_create(struct yagl_display *dpy,
uint32_t width,
uint32_t height,
uint32_t depth)
{
struct yagl_bimage *res = NULL;
XPixmapFormatValues *pfs;
int i, num_formats;
Visual visual;
unsigned int image_bytes = 0;
YAGL_LOG_FUNC_ENTER(yagl_bimage_create,
"width = %u, height = %u, depth = %u",
width, height, depth);
res = yagl_malloc0(sizeof(*res));
res->width = width;
res->height = height;
res->depth = depth;
res->dpy = dpy;
pfs = XListPixmapFormats(dpy->x_dpy, &num_formats);
if (!pfs) {
YAGL_LOG_ERROR("XListPixmapFormats failed");
goto fail;
}
for (i = 0; i < num_formats; ++i) {
if (pfs[i].depth == (int)depth) {
res->bpp = (pfs[i].bits_per_pixel / 8);
break;
}
}
XFree(pfs);
pfs = NULL;
if (i == num_formats) {
YAGL_LOG_ERROR("No suitable pixmap format found for depth %u", depth);
goto fail;
}
if (dpy->xshm_images_supported) {
res->x_image = XShmCreateImage(dpy->x_dpy,
&visual,
depth,
ZPixmap,
NULL,
&res->x_shm,
width,
height);
if (res->x_image) {
image_bytes = res->x_image->bytes_per_line * res->x_image->height;
res->x_shm.shmid = shmget(IPC_PRIVATE, image_bytes, IPC_CREAT | 0777);
if (res->x_shm.shmid != -1) {
res->x_shm.shmaddr = shmat(res->x_shm.shmid, 0, 0);
if (res->x_shm.shmaddr != (char*)-1) {
if (XShmAttach(dpy->x_dpy, &res->x_shm)) {
res->pixels = res->x_image->data = res->x_shm.shmaddr;
goto allocated;
} else {
YAGL_LOG_ERROR("XShmAttach failed");
}
shmdt(res->x_shm.shmaddr);
res->x_shm.shmaddr = (char*)-1;
} else {
YAGL_LOG_ERROR("shmat failed");
}
shmctl(res->x_shm.shmid, IPC_RMID, 0);
res->x_shm.shmid = -1;
} else {
YAGL_LOG_ERROR("shmget failed");
}
XDestroyImage(res->x_image);
res->x_image = NULL;
} else {
YAGL_LOG_ERROR("XShmCreateImage failed");
}
}
allocated:
if (!dpy->xshm_images_supported || !res->x_image) {
image_bytes = width * height * res->bpp;
res->pixels = yagl_malloc(image_bytes);
res->x_image = yagl_malloc0(sizeof(*res->x_image));
res->x_image->width = res->width;
res->x_image->height = res->height;
res->x_image->xoffset = 0;
res->x_image->format = ZPixmap;
res->x_image->data = res->pixels;
res->x_image->byte_order = LSBFirst;
res->x_image->bitmap_unit = res->bpp * 8;
res->x_image->bitmap_pad = 8;
res->x_image->depth = res->depth;
res->x_image->bytes_per_line = res->width * res->bpp;
res->x_image->bits_per_pixel = res->bpp * 8;
if (!XInitImage(res->x_image)) {
YAGL_LOG_ERROR("XInitImage failed");
yagl_free(res->x_image);
res->x_image = NULL;
yagl_free(res->pixels);
res->pixels = NULL;
goto fail;
}
}
XSync(dpy->x_dpy, 0);
if (mlock(res->pixels, res->width * res->height * res->bpp) == -1)
{
fprintf(stderr, "Critical error! Unable to lock YaGL bimage memory: %s!\n", strerror(errno));
exit(1);
}
/*
* Probe in immediately.
*/
yagl_mem_probe_write(res->pixels, res->width * res->height * res->bpp);
YAGL_LOG_FUNC_EXIT(NULL);
return res;
fail:
yagl_free(res);
YAGL_LOG_FUNC_EXIT(NULL);
return NULL;
}
void yagl_bimage_destroy(struct yagl_bimage *bi)
{
if (munlock(bi->pixels, bi->width * bi->height * bi->bpp) == -1)
{
fprintf(stderr, "Critical error! Unable to unlock YaGL bimage memory: %s!\n", strerror(errno));
exit(1);
}
if (bi->x_shm.shmid != -1) {
XShmDetach(bi->dpy->x_dpy, &bi->x_shm);
shmdt(bi->x_shm.shmaddr);
bi->x_shm.shmaddr = (char*)-1;
shmctl(bi->x_shm.shmid, IPC_RMID, 0);
bi->x_shm.shmid = -1;
XDestroyImage(bi->x_image);
bi->x_image = NULL;
bi->pixels = NULL;
} else {
yagl_free(bi->x_image);
bi->x_image = NULL;
yagl_free(bi->pixels);
bi->pixels = NULL;
}
yagl_free(bi);
}
void yagl_bimage_draw(struct yagl_bimage *bi, Drawable target, GC gc)
{
if (bi->x_shm.shmid != -1) {
XShmPutImage(bi->dpy->x_dpy, target, gc, bi->x_image,
0, 0, 0, 0, bi->width, bi->height, 0);
} else {
XPutImage(bi->dpy->x_dpy, target, gc, bi->x_image,
0, 0, 0, 0, bi->width, bi->height);
}
XFlush(bi->dpy->x_dpy);
}
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