XMesaBuffer
XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
unsigned int width, unsigned int height)
{
Window root;
Drawable drawable; /* X Pixmap Drawable */
XMesaBuffer b;
/* allocate pixmap for front buffer */
root = RootWindow( v->display, v->visinfo->screen );
drawable = XCreatePixmap(v->display, root, width, height,
v->visinfo->depth);
if (!drawable)
return NULL;
b = create_xmesa_buffer(drawable, PBUFFER, v, cmap);
if (!b)
return NULL;
if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
drawable, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
/**
* For GLX_EXT_texture_from_pixmap
*/
XMesaBuffer
XMesaCreatePixmapTextureBuffer(XMesaVisual v, XMesaPixmap p,
XMesaColormap cmap,
int format, int target, int mipmap)
{
GET_CURRENT_CONTEXT(ctx);
XMesaBuffer b;
GLuint width, height;
assert(v);
b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
if (!b)
return NULL;
/* get pixmap size, update framebuffer/renderbuffer dims */
xmesa_get_window_size(v->display, b, &width, &height);
_mesa_resize_framebuffer(NULL, &(b->mesa_buffer), width, height);
if (target == 0) {
/* examine dims */
if (ctx->Extensions.ARB_texture_non_power_of_two) {
target = GLX_TEXTURE_2D_EXT;
}
else if ( _mesa_bitcount(width) == 1
&& _mesa_bitcount(height) == 1) {
/* power of two size */
if (height == 1) {
target = GLX_TEXTURE_1D_EXT;
}
else {
target = GLX_TEXTURE_2D_EXT;
}
}
else if (ctx->Extensions.NV_texture_rectangle) {
target = GLX_TEXTURE_RECTANGLE_EXT;
}
else {
/* non power of two textures not supported */
XMesaDestroyBuffer(b);
return 0;
}
}
b->TextureTarget = target;
b->TextureFormat = format;
b->TextureMipmap = mipmap;
if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
/**
* Create a new XMesaBuffer from an X pixmap.
*
* \param v the XMesaVisual
* \param p the pixmap
* \param cmap the colormap, may be 0 if using a \c GLX_TRUE_COLOR or
* \c GLX_DIRECT_COLOR visual for the pixmap
* \returns new XMesaBuffer or NULL if error
*/
PUBLIC XMesaBuffer
XMesaCreatePixmapBuffer(XMesaVisual v, XMesaPixmap p, XMesaColormap cmap)
{
XMesaBuffer b;
assert(v);
b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
if (!b)
return NULL;
if (!initialize_visual_and_buffer(v, b, (XMesaDrawable) p, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
/**
* Private function for creating an XMesaBuffer which corresponds to an
* X window or pixmap.
* \param v the window's XMesaVisual
* \param w the window we're wrapping
* \return new XMesaBuffer or NULL if error
*/
PUBLIC XMesaBuffer
XMesaCreateWindowBuffer(XMesaVisual v, Window w)
{
XWindowAttributes attr;
XMesaBuffer b;
Colormap cmap;
int depth;
assert(v);
assert(w);
/* Check that window depth matches visual depth */
XGetWindowAttributes( v->display, w, &attr );
depth = attr.depth;
if (v->visinfo->depth != depth) {
_mesa_warning(NULL, "XMesaCreateWindowBuffer: depth mismatch between visual (%d) and window (%d)!\n",
v->visinfo->depth, depth);
return NULL;
}
/* Find colormap */
if (attr.colormap) {
cmap = attr.colormap;
}
else {
_mesa_warning(NULL, "Window %u has no colormap!\n", (unsigned int) w);
/* this is weird, a window w/out a colormap!? */
/* OK, let's just allocate a new one and hope for the best */
cmap = XCreateColormap(v->display, w, attr.visual, AllocNone);
}
b = create_xmesa_buffer((Drawable) w, WINDOW, v, cmap);
if (!b)
return NULL;
if (!initialize_visual_and_buffer( v, b, v->mesa_visual.rgbMode,
(Drawable) w, cmap )) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}