void
xmesa_swap_st_framebuffer(struct st_framebuffer_iface *stfbi)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
boolean ret;
ret = xmesa_st_framebuffer_display(stfbi, ST_ATTACHMENT_BACK_LEFT);
if (ret) {
struct pipe_resource **front, **back, *tmp;
front = &xstfb->textures[ST_ATTACHMENT_FRONT_LEFT];
back = &xstfb->textures[ST_ATTACHMENT_BACK_LEFT];
/* swap textures only if the front texture has been allocated */
if (*front) {
tmp = *front;
*front = *back;
*back = tmp;
/* the current context should validate the buffer after swapping */
if (!xmesa_strict_invalidate)
xmesa_notify_invalid_buffer(xstfb->buffer);
}
if (xmesa_strict_invalidate)
xmesa_check_buffer_size(xstfb->buffer);
}
}
/**
* Check that a framebuffer's attachments match the window's size.
*
* Called via st_framebuffer_iface::validate()
*
* \param statts array of framebuffer attachments
* \param count number of framebuffer attachments in statts[]
* \param out returns resources for each of the attachments
*/
static boolean
xmesa_st_framebuffer_validate(struct st_context_iface *stctx,
struct st_framebuffer_iface *stfbi,
const enum st_attachment_type *statts,
unsigned count,
struct pipe_resource **out)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
unsigned statt_mask, new_mask, i;
boolean resized;
boolean ret;
/* build mask of ST_ATTACHMENT bits */
statt_mask = 0x0;
for (i = 0; i < count; i++)
statt_mask |= 1 << statts[i];
/* record newly allocated textures */
new_mask = statt_mask & ~xstfb->texture_mask;
/* If xmesa_strict_invalidate is not set, we will not yet have
* called XGetGeometry(). Do so here:
*/
if (!xmesa_strict_invalidate)
xmesa_check_buffer_size(xstfb->buffer);
resized = (xstfb->buffer->width != xstfb->texture_width ||
xstfb->buffer->height != xstfb->texture_height);
/* revalidate textures */
if (resized || new_mask) {
ret = xmesa_st_framebuffer_validate_textures(stfbi,
xstfb->buffer->width, xstfb->buffer->height, statt_mask);
if (!ret)
return ret;
if (!resized) {
enum st_attachment_type back, front;
back = ST_ATTACHMENT_BACK_LEFT;
front = ST_ATTACHMENT_FRONT_LEFT;
/* copy the contents if front is newly allocated and back is not */
if ((statt_mask & (1 << back)) &&
(new_mask & (1 << front)) &&
!(new_mask & (1 << back))) {
xmesa_st_framebuffer_copy_textures(stfbi, back, front,
0, 0, xstfb->texture_width, xstfb->texture_height);
}
}
}
for (i = 0; i < count; i++) {
out[i] = NULL;
pipe_resource_reference(&out[i], xstfb->textures[statts[i]]);
}
return TRUE;
}
/*
* Bind buffer b to context c and make c the current rendering context.
*/
PUBLIC
GLboolean XMesaMakeCurrent2( XMesaContext c, XMesaBuffer drawBuffer,
XMesaBuffer readBuffer )
{
XMesaContext old_ctx = XMesaGetCurrentContext();
if (old_ctx && old_ctx != c) {
XMesaFlush(old_ctx);
old_ctx->xm_buffer = NULL;
old_ctx->xm_read_buffer = NULL;
}
if (c) {
if (!drawBuffer || !readBuffer)
return GL_FALSE; /* must specify buffers! */
if (c == old_ctx &&
c->xm_buffer == drawBuffer &&
c->xm_read_buffer == readBuffer)
return GL_TRUE;
xmesa_check_buffer_size(drawBuffer);
if (readBuffer != drawBuffer)
xmesa_check_buffer_size(readBuffer);
c->xm_buffer = drawBuffer;
c->xm_read_buffer = readBuffer;
stapi->make_current(stapi, c->st, drawBuffer->stfb, readBuffer->stfb);
/* Solution to Stephane Rehel's problem with glXReleaseBuffersMESA(): */
drawBuffer->wasCurrent = GL_TRUE;
}
else {
/* Detach */
stapi->make_current(stapi, NULL, NULL, NULL);
}
return GL_TRUE;
}
/**
* Called via st_framebuffer_iface::flush_front()
*/
static boolean
xmesa_st_framebuffer_flush_front(struct st_framebuffer_iface *stfbi,
enum st_attachment_type statt)
{
struct xmesa_st_framebuffer *xstfb = xmesa_st_framebuffer(stfbi);
boolean ret;
ret = xmesa_st_framebuffer_display(stfbi, statt);
if (ret && xmesa_strict_invalidate)
xmesa_check_buffer_size(xstfb->buffer);
return ret;
}
