/*
* Mesa 3-D graphics library
- * Version: 6.5
+ * Version: 6.5.2
*
- * Copyright (C) 1999-2005 Brian Paul All Rights Reserved.
+ * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
*/
+/**
+ * \file xm_buffer.h
+ * Framebuffer and renderbuffer-related functions.
+ */
+
+
#include "glxheader.h"
-#include "GL/xmesa.h"
#include "xmesaP.h"
-#include "imports.h"
-#include "renderbuffer.h"
+#include "main/imports.h"
+#include "main/framebuffer.h"
+#include "main/renderbuffer.h"
+
+
+#if defined(USE_XSHM) && !defined(XFree86Server)
+static volatile int mesaXErrorFlag = 0;
+
+/**
+ * Catches potential Xlib errors.
+ */
+static int
+mesaHandleXError(XMesaDisplay *dpy, XErrorEvent *event)
+{
+ (void) dpy;
+ (void) event;
+ mesaXErrorFlag = 1;
+ return 0;
+}
+
+/**
+ * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
+ * Return: GL_TRUE if success, GL_FALSE if error
+ */
+static GLboolean
+alloc_back_shm_ximage(XMesaBuffer b, GLuint width, GLuint height)
+{
+ /*
+ * We have to do a _lot_ of error checking here to be sure we can
+ * really use the XSHM extension. It seems different servers trigger
+ * errors at different points if the extension won't work. Therefore
+ * we have to be very careful...
+ */
+ GC gc;
+ int (*old_handler)(XMesaDisplay *, XErrorEvent *);
+
+ if (width == 0 || height == 0) {
+ /* this will be true the first time we're called on 'b' */
+ return GL_FALSE;
+ }
+
+ b->backxrb->ximage = XShmCreateImage(b->xm_visual->display,
+ b->xm_visual->visinfo->visual,
+ b->xm_visual->visinfo->depth,
+ ZPixmap, NULL, &b->shminfo,
+ width, height);
+ if (b->backxrb->ximage == NULL) {
+ _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (XShmCreateImage), disabling.\n");
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ b->shminfo.shmid = shmget(IPC_PRIVATE, b->backxrb->ximage->bytes_per_line
+ * b->backxrb->ximage->height, IPC_CREAT|0777);
+ if (b->shminfo.shmid < 0) {
+ _mesa_warning(NULL, "shmget failed while allocating back buffer.\n");
+ XDestroyImage(b->backxrb->ximage);
+ b->backxrb->ximage = NULL;
+ _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmget), disabling.\n");
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ b->shminfo.shmaddr = b->backxrb->ximage->data
+ = (char*)shmat(b->shminfo.shmid, 0, 0);
+ if (b->shminfo.shmaddr == (char *) -1) {
+ _mesa_warning(NULL, "shmat() failed while allocating back buffer.\n");
+ XDestroyImage(b->backxrb->ximage);
+ shmctl(b->shminfo.shmid, IPC_RMID, 0);
+ b->backxrb->ximage = NULL;
+ _mesa_warning(NULL, "alloc_back_buffer: Shared memory error (shmat), disabling.\n");
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ b->shminfo.readOnly = False;
+ mesaXErrorFlag = 0;
+ old_handler = XSetErrorHandler(mesaHandleXError);
+ /* This may trigger the X protocol error we're ready to catch: */
+ XShmAttach(b->xm_visual->display, &b->shminfo);
+ XSync(b->xm_visual->display, False);
+
+ if (mesaXErrorFlag) {
+ /* we are on a remote display, this error is normal, don't print it */
+ XFlush(b->xm_visual->display);
+ mesaXErrorFlag = 0;
+ XDestroyImage(b->backxrb->ximage);
+ shmdt(b->shminfo.shmaddr);
+ shmctl(b->shminfo.shmid, IPC_RMID, 0);
+ b->backxrb->ximage = NULL;
+ b->shm = 0;
+ (void) XSetErrorHandler(old_handler);
+ return GL_FALSE;
+ }
+
+ shmctl(b->shminfo.shmid, IPC_RMID, 0); /* nobody else needs it */
+
+ /* Finally, try an XShmPutImage to be really sure the extension works */
+ gc = XCreateGC(b->xm_visual->display, b->frontxrb->drawable, 0, NULL);
+ XShmPutImage(b->xm_visual->display, b->frontxrb->drawable, gc,
+ b->backxrb->ximage, 0, 0, 0, 0, 1, 1 /*one pixel*/, False);
+ XSync(b->xm_visual->display, False);
+ XFreeGC(b->xm_visual->display, gc);
+ (void) XSetErrorHandler(old_handler);
+ if (mesaXErrorFlag) {
+ XFlush(b->xm_visual->display);
+ mesaXErrorFlag = 0;
+ XDestroyImage(b->backxrb->ximage);
+ shmdt(b->shminfo.shmaddr);
+ shmctl(b->shminfo.shmid, IPC_RMID, 0);
+ b->backxrb->ximage = NULL;
+ b->shm = 0;
+ return GL_FALSE;
+ }
+
+ return GL_TRUE;
+}
+#else
+static GLboolean
+alloc_back_shm_ximage(XMesaBuffer b, GLuint width, GLuint height)
+{
+ /* Can't compile XSHM support */
+ return GL_FALSE;
+}
+#endif
+
+
+
+/**
+ * Setup an off-screen pixmap or Ximage to use as the back buffer.
+ * Input: b - the X/Mesa buffer
+ */
+static void
+alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
+{
+ if (b->db_mode == BACK_XIMAGE) {
+ /* Deallocate the old backxrb->ximage, if any */
+ if (b->backxrb->ximage) {
+#if defined(USE_XSHM) && !defined(XFree86Server)
+ if (b->shm) {
+ XShmDetach(b->xm_visual->display, &b->shminfo);
+ XDestroyImage(b->backxrb->ximage);
+ shmdt(b->shminfo.shmaddr);
+ }
+ else
+#endif
+ XMesaDestroyImage(b->backxrb->ximage);
+ b->backxrb->ximage = NULL;
+ }
+
+ if (width == 0 || height == 0)
+ return;
+
+ /* Allocate new back buffer */
+ if (b->shm == 0 || !alloc_back_shm_ximage(b, width, height)) {
+ /* Allocate a regular XImage for the back buffer. */
+#ifdef XFree86Server
+ b->backxrb->ximage = XMesaCreateImage(b->xm_visual->BitsPerPixel,
+ width, height, NULL);
+#else
+ b->backxrb->ximage = XCreateImage(b->xm_visual->display,
+ b->xm_visual->visinfo->visual,
+ GET_VISUAL_DEPTH(b->xm_visual),
+ ZPixmap, 0, /* format, offset */
+ NULL,
+ width, height,
+ 8, 0); /* pad, bytes_per_line */
+#endif
+ if (!b->backxrb->ximage) {
+ _mesa_warning(NULL, "alloc_back_buffer: XCreateImage failed.\n");
+ return;
+ }
+ b->backxrb->ximage->data = (char *) MALLOC(b->backxrb->ximage->height
+ * b->backxrb->ximage->bytes_per_line);
+ if (!b->backxrb->ximage->data) {
+ _mesa_warning(NULL, "alloc_back_buffer: MALLOC failed.\n");
+ XMesaDestroyImage(b->backxrb->ximage);
+ b->backxrb->ximage = NULL;
+ }
+ }
+ b->backxrb->pixmap = None;
+ }
+ else if (b->db_mode == BACK_PIXMAP) {
+ /* Free the old back pixmap */
+ if (b->backxrb->pixmap) {
+ XMesaFreePixmap(b->xm_visual->display, b->backxrb->pixmap);
+ b->backxrb->pixmap = 0;
+ }
+
+ if (width > 0 && height > 0) {
+ /* Allocate new back pixmap */
+ b->backxrb->pixmap = XMesaCreatePixmap(b->xm_visual->display,
+ b->frontxrb->drawable,
+ width, height,
+ GET_VISUAL_DEPTH(b->xm_visual));
+ }
+
+ b->backxrb->ximage = NULL;
+ b->backxrb->drawable = b->backxrb->pixmap;
+ }
+}
static void
/**
* Reallocate renderbuffer storage for front color buffer.
+ * Called via gl_renderbuffer::AllocStorage()
*/
static GLboolean
xmesa_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
- struct xmesa_renderbuffer *xrb = (struct xmesa_renderbuffer *) rb;
+ struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
/* just clear these to be sure we don't accidentally use them */
xrb->origin1 = NULL;
xrb->origin2 = NULL;
+ xrb->origin3 = NULL;
xrb->origin4 = NULL;
/* for the FLIP macro: */
/**
* Reallocate renderbuffer storage for back color buffer.
- * XXX we should resize the back pixmap/ximage here.
+ * Called via gl_renderbuffer::AllocStorage()
*/
static GLboolean
xmesa_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
GLenum internalFormat, GLuint width, GLuint height)
{
- struct xmesa_renderbuffer *xrb = (struct xmesa_renderbuffer *) rb;
+ struct xmesa_renderbuffer *xrb = xmesa_renderbuffer(rb);
+
+ /* reallocate the back buffer XImage or Pixmap */
+ assert(xrb->Parent);
+ alloc_back_buffer(xrb->Parent, width, height);
/* same as front buffer */
+ /* XXX why is this here? */
(void) xmesa_alloc_front_storage(ctx, rb, internalFormat, width, height);
/* plus... */
xrb->origin4 = (GLuint *) xrb->ximage->data + xrb->width4 * (height - 1);
}
else {
- /* this assertion will fail if we happend to run out of memory */
- /*assert(xrb->pixmap);*/
+ /* out of memory or buffer size is 0 x 0 */
+ xrb->width1 = xrb->width2 = xrb->width3 = xrb->width4 = 0;
+ xrb->origin1 = NULL;
+ xrb->origin2 = NULL;
+ xrb->origin3 = NULL;
+ xrb->origin4 = NULL;
}
return GL_TRUE;
}
+/**
+ * Called via gl_framebuffer::Delete() method when this buffer
+ * is _really_ being deleted.
+ */
+void
+xmesa_delete_framebuffer(struct gl_framebuffer *fb)
+{
+ XMesaBuffer b = XMESA_BUFFER(fb);
+ if (b->num_alloced > 0) {
+ /* If no other buffer uses this X colormap then free the colors. */
+ if (!xmesa_find_buffer(b->display, b->cmap, b)) {
+#ifdef XFree86Server
+ int client = 0;
+ if (b->frontxrb->drawable)
+ client = CLIENT_ID(b->frontxrb->drawable->id);
+ (void)FreeColors(b->cmap, client,
+ b->num_alloced, b->alloced_colors, 0);
+#else
+ XFreeColors(b->display, b->cmap,
+ b->alloced_colors, b->num_alloced, 0);
+#endif
+ }
+ }
+ if (b->gc)
+ XMesaFreeGC(b->display, b->gc);
+ if (b->cleargc)
+ XMesaFreeGC(b->display, b->cleargc);
+ if (b->swapgc)
+ XMesaFreeGC(b->display, b->swapgc);
+
+ if (fb->Visual.doubleBufferMode) {
+ /* free back ximage/pixmap/shmregion */
+ if (b->backxrb->ximage) {
+#if defined(USE_XSHM) && !defined(XFree86Server)
+ if (b->shm) {
+ XShmDetach( b->display, &b->shminfo );
+ XDestroyImage( b->backxrb->ximage );
+ shmdt( b->shminfo.shmaddr );
+ }
+ else
+#endif
+ XMesaDestroyImage( b->backxrb->ximage );
+ b->backxrb->ximage = NULL;
+ }
+ if (b->backxrb->pixmap) {
+ XMesaFreePixmap( b->display, b->backxrb->pixmap );
+ if (b->xm_visual->hpcr_clear_flag) {
+ XMesaFreePixmap( b->display,
+ b->xm_visual->hpcr_clear_pixmap );
+ XMesaDestroyImage( b->xm_visual->hpcr_clear_ximage );
+ }
+ }
+ }
+
+ if (b->rowimage) {
+ _mesa_free( b->rowimage->data );
+ b->rowimage->data = NULL;
+ XMesaDestroyImage( b->rowimage );
+ }
+
+ _mesa_free_framebuffer_data(fb);
+ _mesa_free(fb);
+}
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