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authorBrian <[email protected]>2007-03-16 11:00:07 -0600
committerBrian <[email protected]>2007-03-16 11:00:07 -0600
commite5070bc3ca75dee31034cc543f3d2ee04e5dc032 (patch)
treec275438e2790d47da063fdccd7a7acbf64a3afd4 /src/mesa/drivers/x11
parent7573b58db659b32f3589fc955959710d44353239 (diff)
Assorted fixes for dealing with zero-size frame/renderbuffers.
In xmesa_check_and_update_buffer_size() handle xmctx==NULL correctly: still call _mesa_resize_framebufer(). If we don't we can wind up in a situation where the framebuffer size is non-zero but an attached renderbuffer size is still initialized to zero. This inconsistancy can later cause problems. Check for zero-size renderbuffers in update_color_draw_buffers() and update_color_read_buffer(). See bug 7205.
Diffstat (limited to 'src/mesa/drivers/x11')
-rw-r--r--src/mesa/drivers/x11/xm_api.c14
-rw-r--r--src/mesa/drivers/x11/xm_buffer.c39
2 files changed, 31 insertions, 22 deletions
diff --git a/src/mesa/drivers/x11/xm_api.c b/src/mesa/drivers/x11/xm_api.c
index ba020fc3d6a..b513dc8d40a 100644
--- a/src/mesa/drivers/x11/xm_api.c
+++ b/src/mesa/drivers/x11/xm_api.c
@@ -1842,16 +1842,18 @@ XMesaDestroyBuffer(XMesaBuffer b)
* 1. the first time a buffer is bound to a context.
* 2. from glViewport to poll for window size changes
* 3. from the XMesaResizeBuffers() API function.
+ * Note: it's possible (and legal) for xmctx to be NULL. That can happen
+ * when resizing a buffer when no rendering context is bound.
*/
void
xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
{
GLuint width, height;
- xmesa_get_window_size(xmctx->display, drawBuffer, &width, &height);
+ xmesa_get_window_size(drawBuffer->display, drawBuffer, &width, &height);
if (drawBuffer->mesa_buffer.Width != width ||
drawBuffer->mesa_buffer.Height != height) {
- _mesa_resize_framebuffer(&(xmctx->mesa),
- &(drawBuffer->mesa_buffer), width, height);
+ GLcontext *ctx = xmctx ? &xmctx->mesa : NULL;
+ _mesa_resize_framebuffer(ctx, &(drawBuffer->mesa_buffer), width, height);
}
drawBuffer->mesa_buffer.Initialized = GL_TRUE; /* XXX TEMPORARY? */
}
@@ -2175,7 +2177,7 @@ void XMesaSwapBuffers( XMesaBuffer b )
}
#endif
if (b->backxrb->ximage) {
- /* Copy Ximage from host's memory to server's window */
+ /* Copy Ximage (back buf) from client memory to server window */
#if defined(USE_XSHM) && !defined(XFree86Server)
if (b->shm) {
/*_glthread_LOCK_MUTEX(_xmesa_lock);*/
@@ -2197,8 +2199,8 @@ void XMesaSwapBuffers( XMesaBuffer b )
/*_glthread_UNLOCK_MUTEX(_xmesa_lock);*/
}
}
- else {
- /* Copy pixmap to window on server */
+ else if (b->backxrb->pixmap) {
+ /* Copy pixmap (back buf) to window (front buf) on server */
/*_glthread_LOCK_MUTEX(_xmesa_lock);*/
XMesaCopyArea( b->xm_visual->display,
b->backxrb->pixmap, /* source drawable */
diff --git a/src/mesa/drivers/x11/xm_buffer.c b/src/mesa/drivers/x11/xm_buffer.c
index 73c46b1fe60..c1fa23328f0 100644
--- a/src/mesa/drivers/x11/xm_buffer.c
+++ b/src/mesa/drivers/x11/xm_buffer.c
@@ -168,9 +168,6 @@ alloc_back_shm_ximage(XMesaBuffer b, GLuint width, GLuint height)
static void
alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
{
- if (width == 0 || height == 0)
- return;
-
if (b->db_mode == BACK_XIMAGE) {
/* Deallocate the old backxrb->ximage, if any */
if (b->backxrb->ximage) {
@@ -186,6 +183,9 @@ alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
b->backxrb->ximage = NULL;
}
+ if (width == 0 || height == 0)
+ return;
+
/* Allocate new back buffer */
#ifdef XFree86Server
/* Allocate a regular XImage for the back buffer. */
@@ -218,20 +218,20 @@ alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
b->backxrb->pixmap = None;
}
else if (b->db_mode == BACK_PIXMAP) {
- if (!width)
- width = 1;
- if (!height)
- height = 1;
-
/* Free the old back pixmap */
if (b->backxrb->pixmap) {
- XMesaFreePixmap(b->xm_visual->display, b->backxrb->pixmap);
+ XMesaFreePixmap(b->xm_visual->display, b->backxrb->pixmap);
+ b->backxrb->pixmap = 0;
}
- /* Allocate new back pixmap */
- b->backxrb->pixmap = XMesaCreatePixmap(b->xm_visual->display,
- b->frontxrb->drawable,
- width, height,
- GET_VISUAL_DEPTH(b->xm_visual));
+
+ 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;
}
}
@@ -250,6 +250,7 @@ xmesa_delete_renderbuffer(struct gl_renderbuffer *rb)
/**
* Reallocate renderbuffer storage for front color buffer.
+ * Called via gl_renderbuffer::AllocStorage()
*/
static GLboolean
xmesa_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
@@ -260,6 +261,7 @@ xmesa_alloc_front_storage(GLcontext *ctx, struct gl_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: */
@@ -275,6 +277,7 @@ xmesa_alloc_front_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
/**
* Reallocate renderbuffer storage for back color buffer.
+ * Called via gl_renderbuffer::AllocStorage()
*/
static GLboolean
xmesa_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
@@ -309,8 +312,12 @@ xmesa_alloc_back_storage(GLcontext *ctx, struct gl_renderbuffer *rb,
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;