* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
-/*
- * This file contains the implementations of all the XMesa* functions.
+/**
+ * \file xm_api.c
+ *
+ * All the XMesa* API functions.
*
*
* NOTES:
#include "framebuffer.h"
#include "glthread.h"
#include "imports.h"
-#include "matrix.h"
-#include "mtypes.h"
#include "macros.h"
#include "renderbuffer.h"
-#include "texformat.h"
-#include "texobj.h"
-#include "texstore.h"
#include "swrast/swrast.h"
#include "swrast_setup/swrast_setup.h"
#include "array_cache/acache.h"
#include <GL/glxtokens.h>
#endif
-/*
+/**
* Global X driver lock
*/
_glthread_Mutex _xmesa_lock;
-/*
+/**
* Lookup tables for HPCR pixel format:
*/
static short hpcr_rgbTbl[3][256] = {
/**********************************************************************/
-/*
+/**
* Return the host's byte order as LSBFirst or MSBFirst ala X.
*/
#ifndef XFree86Server
#endif
-/*
- * Error handling.
- */
-#ifndef XFree86Server
-static volatile int mesaXErrorFlag = 0;
-
-static int mesaHandleXError( XMesaDisplay *dpy, XErrorEvent *event )
-{
- (void) dpy;
- (void) event;
- mesaXErrorFlag = 1;
- return 0;
-}
-#endif
-
-
-/*
+/**
* Check if the X Shared Memory extension is available.
* Return: 0 = not available
* 1 = shared XImage support available
}
-/*
+/**
* Apply gamma correction to an intensity value in [0..max]. Return the
* new intensity value.
*/
-static GLint gamma_adjust( GLfloat gamma, GLint value, GLint max )
+static GLint
+gamma_adjust( GLfloat gamma, GLint value, GLint max )
{
if (gamma == 1.0) {
return value;
-/*
+/**
* Return the true number of bits per pixel for XImages.
* For example, if we request a 24-bit deep visual we may actually need/get
* 32bpp XImages. This function returns the appropriate bpp.
* visinfo - desribes the visual to be used for XImages
* Return: true number of bits per pixel for XImages
*/
-#ifdef XFree86Server
-
-static int bits_per_pixel( XMesaVisual xmv )
+static int
+bits_per_pixel( XMesaVisual xmv )
{
+#ifdef XFree86Server
const int depth = xmv->nplanes;
int i;
assert(depth > 0);
return screenInfo.formats[i].bitsPerPixel;
}
return depth; /* should never get here, but this should be safe */
-}
-
#else
-
-static int bits_per_pixel( XMesaVisual xmv )
-{
XMesaDisplay *dpy = xmv->display;
XMesaVisualInfo visinfo = xmv->visinfo;
XMesaImage *img;
img->data = NULL;
XMesaDestroyImage( img );
return bitsPerPixel;
-}
#endif
+}
+/**
+ * Return the size of the window (or pixmap) that corresponds to the
+ * given XMesaBuffer.
+ * \param width returns width in pixels
+ * \param height returns height in pixels
+ */
+void
+xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
+ GLuint *width, GLuint *height)
+{
+#ifdef XFree86Server
+ *width = MIN2(b->frontxrb->drawable->width, MAX_WIDTH);
+ *height = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT);
+#else
+ Window root;
+ Status stat;
+ int xpos, ypos;
+ unsigned int w, h, bw, depth;
+
+ _glthread_LOCK_MUTEX(_xmesa_lock);
+ XSync(b->xm_visual->display, 0); /* added for Chromium */
+ stat = XGetGeometry(dpy, b->frontxrb->pixmap, &root, &xpos, &ypos,
+ &w, &h, &bw, &depth);
+ _glthread_UNLOCK_MUTEX(_xmesa_lock);
+
+ if (stat) {
+ *width = w;
+ *height = h;
+ }
+ else {
+ /* probably querying a window that's recently been destroyed */
+ _mesa_warning(NULL, "XGetGeometry failed!\n");
+ *width = *height = 1;
+ }
+#endif
+}
+
+
+
/**********************************************************************/
/***** Linked list of XMesaBuffers *****/
/**********************************************************************/
/**
- * Allocate a new XMesaBuffer, initialize basic fields and add to
- * the list of all buffers.
+ * Allocate a new XMesaBuffer object which corresponds to the given drawable.
+ * Note that XMesaBuffer is derived from GLframebuffer.
+ * The new XMesaBuffer will not have any size (Width=Height=0).
+ *
+ * \param d the corresponding X drawable (window or pixmap)
+ * \param type either WINDOW, PIXMAP or PBUFFER, describing d
+ * \param vis the buffer's visual
+ * \param cmap the window's colormap, if known.
+ * \return new XMesaBuffer or NULL if any problem
*/
static XMesaBuffer
-alloc_xmesa_buffer(XMesaVisual vis, BufferType type, XMesaColormap cmap)
+create_xmesa_buffer(XMesaDrawable d, BufferType type,
+ XMesaVisual vis, XMesaColormap cmap)
{
- XMesaBuffer b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
- if (b) {
- GLboolean swAlpha;
+ GLboolean swAlpha;
+ XMesaBuffer b;
- b->display = vis->display;
- b->xm_visual = vis;
- b->type = type;
- b->cmap = cmap;
+ ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
- _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
+ b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
+ if (!b)
+ return NULL;
+
+ b->display = vis->display;
+ b->xm_visual = vis;
+ b->type = type;
+ b->cmap = cmap;
- /* Allocate the framebuffer's renderbuffers */
- assert(!b->mesa_buffer.Attachment[BUFFER_FRONT_LEFT].Renderbuffer);
- assert(!b->mesa_buffer.Attachment[BUFFER_BACK_LEFT].Renderbuffer);
+ _mesa_initialize_framebuffer(&b->mesa_buffer, &vis->mesa_visual);
- /* front renderbuffer */
- b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual,
+ /*
+ * Front renderbuffer
+ */
+ b->frontxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual,
GL_FALSE);
- _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
- &b->frontxrb->Base);
-
- /* back renderbuffer */
- if (vis->mesa_visual.doubleBufferMode) {
- b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual,
- GL_TRUE);
- /* determine back buffer implementation */
- b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
-
- _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
- &b->backxrb->Base);
- }
+ if (!b->frontxrb) {
+ _mesa_free(b);
+ return NULL;
+ }
+ b->frontxrb->Parent = b;
+ b->frontxrb->drawable = d;
+ b->frontxrb->pixmap = (XMesaPixmap) d;
+ _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_FRONT_LEFT,
+ &b->frontxrb->Base);
- /* determine if we need software alpha planes */
- if (vis->mesa_visual.alphaBits > 0
- && vis->undithered_pf != PF_8A8B8G8R
- && vis->undithered_pf != PF_8A8R8G8B) {
- /* Visual has alpha, but pixel format doesn't support it.
- * We'll use an alpha renderbuffer wrapper.
- */
- swAlpha = GL_TRUE;
- }
- else {
- swAlpha = GL_FALSE;
+ /*
+ * Back renderbuffer
+ */
+ if (vis->mesa_visual.doubleBufferMode) {
+ b->backxrb = xmesa_new_renderbuffer(NULL, 0, &vis->mesa_visual,
+ GL_TRUE);
+ if (!b->backxrb) {
+ /* XXX free front xrb too */
+ _mesa_free(b);
+ return NULL;
}
+ b->backxrb->Parent = b;
+ /* determine back buffer implementation */
+ b->db_mode = vis->ximage_flag ? BACK_XIMAGE : BACK_PIXMAP;
+
+ _mesa_add_renderbuffer(&b->mesa_buffer, BUFFER_BACK_LEFT,
+ &b->backxrb->Base);
+ }
- _mesa_add_soft_renderbuffers(&b->mesa_buffer,
- GL_FALSE, /* color */
- vis->mesa_visual.haveDepthBuffer,
- vis->mesa_visual.haveStencilBuffer,
- vis->mesa_visual.haveAccumBuffer,
- swAlpha,
- vis->mesa_visual.numAuxBuffers > 0 );
-
- /* insert into linked list */
- b->Next = XMesaBufferList;
- XMesaBufferList = b;
+ /*
+ * Software alpha planes
+ */
+ if (vis->mesa_visual.alphaBits > 0
+ && vis->undithered_pf != PF_8A8B8G8R
+ && vis->undithered_pf != PF_8A8R8G8B) {
+ /* Visual has alpha, but pixel format doesn't support it.
+ * We'll use an alpha renderbuffer wrapper.
+ */
+ swAlpha = GL_TRUE;
+ }
+ else {
+ swAlpha = GL_FALSE;
}
+
+ /*
+ * Other renderbuffer (depth, stencil, etc)
+ */
+ _mesa_add_soft_renderbuffers(&b->mesa_buffer,
+ GL_FALSE, /* color */
+ vis->mesa_visual.haveDepthBuffer,
+ vis->mesa_visual.haveStencilBuffer,
+ vis->mesa_visual.haveAccumBuffer,
+ swAlpha,
+ vis->mesa_visual.numAuxBuffers > 0 );
+
+ /* insert buffer into linked list */
+ b->Next = XMesaBufferList;
+ XMesaBufferList = b;
+
return b;
}
-/*
+/**
* Find an XMesaBuffer by matching X display and colormap but NOT matching
* the notThis buffer.
*/
-static XMesaBuffer find_xmesa_buffer(XMesaDisplay *dpy,
- XMesaColormap cmap,
- XMesaBuffer notThis)
+static XMesaBuffer
+find_xmesa_buffer(XMesaDisplay *dpy, XMesaColormap cmap, XMesaBuffer notThis)
{
XMesaBuffer b;
for (b=XMesaBufferList; b; b=b->Next) {
}
-/*
+/**
* Free an XMesaBuffer, remove from linked list, perhaps free X colormap
* entries.
*/
-static void free_xmesa_buffer(int client, XMesaBuffer buffer)
+static void
+free_xmesa_buffer(int client, XMesaBuffer buffer)
{
XMesaBuffer prev = NULL, b;
(void) client;
}
-/* Copy X color table stuff from one XMesaBuffer to another. */
-static void copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
+/**
+ * Copy X color table stuff from one XMesaBuffer to another.
+ */
+static void
+copy_colortable_info(XMesaBuffer dst, const XMesaBuffer src)
{
MEMCPY(dst->color_table, src->color_table, sizeof(src->color_table));
MEMCPY(dst->pixel_to_r, src->pixel_to_r, sizeof(src->pixel_to_r));
/**
- * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
- * Return: GL_TRUE if success, GL_FALSE if error
- */
-#ifndef XFree86Server
-static GLboolean
-alloc_shm_back_buffer(XMesaBuffer b, GLuint width, GLuint height)
-{
-#ifdef USE_XSHM
- /*
- * 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
- /* Can't compile XSHM support */
- return GL_FALSE;
-#endif
-}
-#endif
-
-
-
-
-/*
- * Setup an off-screen pixmap or Ximage to use as the back buffer.
- * Input: b - the X/Mesa buffer
- */
-void
-xmesa_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) {
-#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;
- }
-
- /* Allocate new back buffer */
-#ifdef XFree86Server
- /* Allocate a regular XImage for the back buffer. */
- b->backxrb->ximage = XMesaCreateImage(b->xm_visual->BitsPerPixel,
- width, height, NULL);
- {
-#else
- if (b->shm == 0 || !alloc_shm_back_buffer(b, width, height)) {
- /* Allocate a regular XImage for the back buffer. */
- 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;
- }
- else {
- /* this call just updates the width/origin fields in the xrb */
- b->backxrb->Base.AllocStorage(NULL, &b->backxrb->Base,
- b->backxrb->Base.InternalFormat,
- b->backxrb->ximage->width,
- b->backxrb->ximage->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 );
- }
- /* 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;
- }
-}
-
-
-
-/*
* A replacement for XAllocColor. This function should never
* fail to allocate a color. When XAllocColor fails, we return
* the nearest matching color. If we have to allocate many colors
if (AllocColor(cmap,
&color->red, &color->green, &color->blue,
&color->pixel,
- client) == Success) {
+ client) == Success)
#else
- if (XAllocColor(dpy, cmap, color)) {
+ if (XAllocColor(dpy, cmap, color))
#endif
+ {
*exact = 1;
*alloced = 1;
return;
-
-/*
+/**
* Do setup for PF_GRAYSCALE pixel format.
* Note that buffer may be NULL.
*/
-static GLboolean setup_grayscale( int client, XMesaVisual v,
- XMesaBuffer buffer, XMesaColormap cmap )
+static GLboolean
+setup_grayscale(int client, XMesaVisual v,
+ XMesaBuffer buffer, XMesaColormap cmap)
{
if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
return GL_FALSE;
-/*
+/**
* Setup RGB rendering for a window with a PseudoColor, StaticColor,
* or 8-bit TrueColor visual visual. We try to allocate a palette of 225
* colors (5 red, 9 green, 5 blue) and dither to approximate a 24-bit RGB
* visuals, it has also proven to work from 4-bit up to 16-bit visuals.
* Dithering code contributed by Bob Mercier.
*/
-static GLboolean setup_dithered_color( int client, XMesaVisual v,
- XMesaBuffer buffer, XMesaColormap cmap )
+static GLboolean
+setup_dithered_color(int client, XMesaVisual v,
+ XMesaBuffer buffer, XMesaColormap cmap)
{
if (GET_VISUAL_DEPTH(v)<4 || GET_VISUAL_DEPTH(v)>16) {
return GL_FALSE;
}
-/*
+/**
* Setup for Hewlett Packard Color Recovery 8-bit TrueColor mode.
* HPCR simulates 24-bit color fidelity with an 8-bit frame buffer.
* Special dithering tables have to be initialized.
*/
-static void setup_8bit_hpcr( XMesaVisual v )
+static void
+setup_8bit_hpcr(XMesaVisual v)
{
/* HP Color Recovery contributed by: Alex De Bruyn (ad@lms.be)
* To work properly, the atom _HP_RGB_SMOOTH_MAP_LIST must be defined
}
-/*
+/**
* Setup RGB rendering for a window with a True/DirectColor visual.
*/
-static void setup_truecolor( XMesaVisual v, XMesaBuffer buffer,
- XMesaColormap cmap )
+static void
+setup_truecolor(XMesaVisual v, XMesaBuffer buffer, XMesaColormap cmap)
{
unsigned long rmask, gmask, bmask;
(void) buffer;
-/*
+/**
* Setup RGB rendering for a window with a monochrome visual.
*/
-static void setup_monochrome( XMesaVisual v, XMesaBuffer b )
+static void
+setup_monochrome( XMesaVisual v, XMesaBuffer b )
{
(void) b;
v->dithered_pf = v->undithered_pf = PF_1Bit;
v->BitsPerPixel = bits_per_pixel(v);
assert(v->BitsPerPixel > 0);
- if (rgb_flag==GL_FALSE) {
+ if (rgb_flag == GL_FALSE) {
/* COLOR-INDEXED WINDOW:
* Even if the visual is TrueColor or DirectColor we treat it as
* being color indexed. This is weird but might be useful to someone.
if (b && window) {
/* Do window-specific initializations */
- b->frontxrb->drawable = window;
- b->frontxrb->pixmap = (XMesaPixmap) window;
+ /* these should have been set in create_xmesa_buffer */
+ ASSERT(b->frontxrb->drawable == window);
+ ASSERT(b->frontxrb->pixmap == (XMesaPixmap) window);
/* Setup for single/double buffering */
if (v->mesa_visual.doubleBufferMode) {
/* Double buffered */
b->shm = check_for_xshm( v->display );
- xmesa_alloc_back_buffer(b, b->mesa_buffer.Width, b->mesa_buffer.Height);
}
/* X11 graphics contexts */
-/*
- * XXX this isn't a public function! It's a hack for the 3Dfx driver.
- * Create a new XMesaBuffer from an X window.
- * Input: v - the XMesaVisual
- * w - the window
- * c - the context
- * Return: new XMesaBuffer or NULL if error
+/**
+ * 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
+ * \param c context used to initialize the buffer if 3Dfx mode in use.
+ * \return new XMesaBuffer or NULL if error
*/
XMesaBuffer
XMesaCreateWindowBuffer2(XMesaVisual v, XMesaWindow w, XMesaContext c)
XMesaColormap cmap;
assert(v);
+ assert(w);
(void) c;
/* Check that window depth matches visual depth */
}
#endif
- b = alloc_xmesa_buffer(v, WINDOW, cmap);
- if (!b) {
+ b = create_xmesa_buffer((XMesaDrawable) w, WINDOW, v, cmap);
+ if (!b)
return NULL;
- }
if (!initialize_visual_and_buffer( client, v, b, v->mesa_visual.rgbMode,
(XMesaDrawable) w, cmap )) {
assert(v);
- b = alloc_xmesa_buffer(v, PIXMAP, cmap);
- if (!b) {
+ b = create_xmesa_buffer((XMesaDrawable) p, PIXMAP, v, cmap);
+ if (!b)
return NULL;
- }
#ifdef XFree86Server
client = CLIENT_ID(((XMesaDrawable)p)->id);
XMesaDrawable drawable; /* X Pixmap Drawable */
XMesaBuffer b;
- b = alloc_xmesa_buffer(v, PBUFFER, cmap);
- if (!b) {
- return NULL;
- }
-
/* allocate pixmap for front buffer */
root = RootWindow( v->display, v->visinfo->screen );
- drawable = XCreatePixmap( v->display, root, width, height, v->visinfo->depth );
+ 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(client, v, b, v->mesa_visual.rgbMode,
drawable, cmap)) {
}
+/**
+ * Query the current window size and update the corresponding GLframebuffer
+ * and all attached renderbuffers.
+ * Called when:
+ * 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.
+ */
+void
+xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer)
+{
+ GLuint width, height;
+ xmesa_get_window_size(xmctx->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);
+ }
+ drawBuffer->mesa_buffer.Initialized = GL_TRUE;
+}
+
/*
* Bind buffer b to context c and make c the current rendering context.
if (&(c->mesa) == _mesa_get_current_context()
&& c->mesa.DrawBuffer == &drawBuffer->mesa_buffer
&& c->mesa.ReadBuffer == &readBuffer->mesa_buffer
- && ((XMesaBuffer) c->mesa.DrawBuffer)->wasCurrent) {
+ && XMESA_BUFFER(c->mesa.DrawBuffer)->wasCurrent) {
/* same context and buffer, do nothing */
return GL_TRUE;
}
*/
_glapi_check_multithread();
+ if (!drawBuffer->mesa_buffer.Initialized)
+ xmesa_check_and_update_buffer_size(c, drawBuffer);
+
+ if (!readBuffer->mesa_buffer.Initialized)
+ xmesa_check_and_update_buffer_size(c, readBuffer);
+
_mesa_make_current(&(c->mesa),
&drawBuffer->mesa_buffer,
&readBuffer->mesa_buffer);
{
GET_CURRENT_CONTEXT(ctx);
if (ctx) {
- return (XMesaBuffer) (ctx->ReadBuffer);
+ return XMESA_BUFFER(ctx->ReadBuffer);
}
else {
return 0;
GET_CURRENT_CONTEXT(ctx);
static unsigned short pixbuf[MAX_WIDTH];
GLuint x, y;
- int xpos, ypos;
- XMesaWindow root;
- unsigned int bw, depth, width, height;
+ GLuint width, height;
XMesaContext xmesa = XMESA_CONTEXT(ctx);
#ifdef XFree86Server
height = b->frontxrb->pixmap->height;
depth = b->frontxrb->pixmap->depth;
#else
- XGetGeometry( b->xm_visual->display, b->frontxrb->pixmap,
- &root, &xpos, &ypos, &width, &height, &bw, &depth);
+ xmesa_get_window_size(b->display, b, &width, &height);
+ x = y = 0;
#endif
if (b->mesa_buffer.Width != width || b->mesa_buffer.Height != height) {
b->mesa_buffer.Width = MIN2((int)width, b->FXctx->width);
b->mesa_buffer.Height = MIN2((int)height, b->FXctx->height);
if (b->mesa_buffer.Width & 1)
b->mesa_buffer.Width--; /* prevent odd width */
- xmesa_alloc_back_buffer(b, b->mesa_buffer.Width, b->mesa_buffer.Height);
}
/* [dBorca] we're always in the right GR_COLORFORMAT... aren't we? */
* This is typically called when the window size changes and we need
* to reallocate the buffer's back/depth/stencil/accum buffers.
*/
-void XMesaResizeBuffers( XMesaBuffer b )
+void
+XMesaResizeBuffers( XMesaBuffer b )
{
-#ifdef XFree86Server
- GLuint winwidth, winheight;
GET_CURRENT_CONTEXT(ctx);
-
- winwidth = MIN2(b->frontxrb->drawable->width, MAX_WIDTH);
- winheight = MIN2(b->frontxrb->drawable->height, MAX_HEIGHT);
-
- xmesa_resize_buffers(ctx, &(b->mesa_buffer), winwidth, winheight);
-#else
- Window root;
- int xpos, ypos;
- unsigned int width, height, bw, depth;
- GET_CURRENT_CONTEXT(ctx);
- XGetGeometry( b->xm_visual->display, b->frontxrb->pixmap,
- &root, &xpos, &ypos, &width, &height, &bw, &depth);
- xmesa_resize_buffers(ctx, &(b->mesa_buffer), width, height);
-#endif
+ XMesaContext xmctx = XMESA_CONTEXT(ctx);
+ xmesa_check_and_update_buffer_size(xmctx, b);
}
/*
* 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 "renderbuffer.h"
+#ifndef 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;
+}
+#endif
+
+
+/**
+ * Allocate a shared memory XImage back buffer for the given XMesaBuffer.
+ * Return: GL_TRUE if success, GL_FALSE if error
+ */
+#ifndef XFree86Server
+static GLboolean
+alloc_back_shm_ximage(XMesaBuffer b, GLuint width, GLuint height)
+{
+#ifdef USE_XSHM
+ /*
+ * 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
+ /* Can't compile XSHM support */
+ return GL_FALSE;
+#endif
+}
+#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 (width == 0 || height == 0)
+ return;
+
+ 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;
+ }
+
+ /* Allocate new back buffer */
+#ifdef XFree86Server
+ /* Allocate a regular XImage for the back buffer. */
+ b->backxrb->ximage = XMesaCreateImage(b->xm_visual->BitsPerPixel,
+ width, height, NULL);
+ {
+#else
+ if (b->shm == 0 || !alloc_back_shm_ximage(b, width, height)) {
+ /* Allocate a regular XImage for the back buffer. */
+ 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;
+ }
+ else {
+ /* this call just updates the width/origin fields in the xrb */
+ b->backxrb->Base.AllocStorage(NULL, &b->backxrb->Base,
+ b->backxrb->Base.InternalFormat,
+ b->backxrb->ximage->width,
+ b->backxrb->ximage->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);
+ }
+ /* 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;
+ }
+}
+
+
static void
xmesa_delete_renderbuffer(struct gl_renderbuffer *rb)
{
/**
* Reallocate renderbuffer storage for back color buffer.
- * XXX we should resize the back pixmap/ximage here.
*/
static GLboolean
xmesa_alloc_back_storage(GLcontext *ctx, struct gl_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... */
};
-/*
- * "Derived" from GLvisual. Basically corresponds to an XVisualInfo.
+/**
+ * Visual inforation, derived from GLvisual.
+ * Basically corresponds to an XVisualInfo.
*/
struct xmesa_visual {
GLvisual mesa_visual; /* Device independent visual parameters */
};
-/*
- * "Derived" from __GLcontextRec. Basically corresponds to a GLXContext.
+/**
+ * Context info, dDerived from GLcontext.
+ * Basically corresponds to a GLXContext.
*/
struct xmesa_context {
GLcontext mesa; /* the core library context (containment) */
};
-
+/**
+ * Types of X/GLX drawables we might render into.
+ */
typedef enum {
WINDOW, /* An X window */
GLXWINDOW, /* GLX window */
} BufferType;
-/* Values for db_mode: */
+/** Values for db_mode: */
+/*@{*/
#define BACK_PIXMAP 1
#define BACK_XIMAGE 2
+/*@}*/
/**
{
struct gl_renderbuffer Base; /* Base class */
+ XMesaBuffer Parent; /**< The XMesaBuffer this renderbuffer belongs to */
XMesaDrawable drawable; /* Usually the X window ID */
XMesaPixmap pixmap; /* Back color buffer */
XMesaImage *ximage; /* The back buffer, if not using a Pixmap */
};
-/*
- * "Derived" from GLframebuffer. Basically corresponds to a GLXDrawable.
+/**
+ * Framebuffer information, derived from.
+ * Basically corresponds to a GLXDrawable.
*/
struct xmesa_buffer {
GLframebuffer mesa_buffer; /* depth, stencil, accum, etc buffers */
};
-/*
+/**
* If pixelformat==PF_TRUECOLOR:
*/
#define PACK_TRUECOLOR( PIXEL, R, G, B ) \
| xmesa->xm_visual->BtoPixel[B]; \
-/*
+/**
* If pixelformat==PF_TRUEDITHER:
*/
#define PACK_TRUEDITHER( PIXEL, X, Y, R, G, B ) \
-/*
+/**
* If pixelformat==PF_8A8B8G8R:
*/
#define PACK_8A8B8G8R( R, G, B, A ) \
( ((A) << 24) | ((B) << 16) | ((G) << 8) | (R) )
-/*
+/**
* Like PACK_8A8B8G8R() but don't use alpha. This is usually an acceptable
* shortcut.
*/
-/*
+/**
* If pixelformat==PF_8R8G8B:
*/
#define PACK_8R8G8B( R, G, B) ( ((R) << 16) | ((G) << 8) | (B) )
-/*
+/**
* If pixelformat==PF_5R6G5B:
*/
#define PACK_5R6G5B( R, G, B) ( (((R) & 0xf8) << 8) | (((G) & 0xfc) << 3) | ((B) >> 3) )
-/*
+/**
* If pixelformat==PF_8A8R8G8B:
*/
#define PACK_8A8R8G8B( R, G, B, A ) \
-/*
+/**
* If pixelformat==PF_DITHER:
*
* Improved 8-bit RGB dithering code contributed by Bob Mercier
-/*
+/**
* If pixelformat==PF_LOOKUP:
*/
#define _dither_lookup(C, c) (((unsigned)((DITH_N * (C - 1) + 1) * c)) >> 12)
_dither_lookup(DITH_B, (B)))]
-
-/*
+/**
* If pixelformat==PF_HPCR:
*
* HP Color Recovery dithering (ad@lms.be 30/08/95)
-/*
+/**
* If pixelformat==PF_1BIT:
*/
extern const int xmesa_kernel1[16];
-/*
+/**
* If pixelformat==PF_GRAYSCALE:
*/
#define GRAY_RGB( R, G, B ) XMESA_BUFFER(ctx->DrawBuffer)->color_table[((R) + (G) + (B))/3]
-/*
+/**
* Converts a GL window Y coord to an X window Y coord:
*/
#define YFLIP(XRB, Y) ((XRB)->bottom - (Y))
-/*
+/**
* Return the address of a 1, 2 or 4-byte pixel in the buffer's XImage:
* X==0 is left, Y==0 is bottom.
*/
-
-/*
- * Return pointer to XMesaContext corresponding to a Mesa GLcontext.
- * Since we're using structure containment, it's just a cast!.
- * XXX should use inlined function for better type safety.
- */
-#define XMESA_CONTEXT(MESACTX) ((XMesaContext) (MESACTX))
-
-/*
- * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
- * Since we're using structure containment, it's just a cast!.
- * XXX should use inlined function for better type safety.
- */
-#define XMESA_BUFFER(MESABUFF) ((XMesaBuffer) (MESABUFF))
-
-
-
/*
* External functions:
*/
GLuint pixelFormat );
extern void
-xmesa_alloc_back_buffer(XMesaBuffer b, GLuint width, GLuint height);
+xmesa_get_window_size(XMesaDisplay *dpy, XMesaBuffer b,
+ GLuint *width, GLuint *height);
-extern void xmesa_resize_buffers(GLcontext *ctx, GLframebuffer *buffer,
- GLuint width, GLuint height);
+extern void
+xmesa_check_and_update_buffer_size(XMesaContext xmctx, XMesaBuffer drawBuffer);
-extern void xmesa_init_driver_functions( XMesaVisual xmvisual,
- struct dd_function_table *driver );
+extern void
+xmesa_init_driver_functions( XMesaVisual xmvisual,
+ struct dd_function_table *driver );
-extern void xmesa_update_state( GLcontext *ctx, GLbitfield new_state );
+extern void
+xmesa_update_state( GLcontext *ctx, GLbitfield new_state );
extern void
xmesa_set_renderbuffer_funcs(struct xmesa_renderbuffer *xrb,
enum pixel_format pixelformat, GLint depth);
-extern void xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
+extern void
+xmesa_destroy_buffers_on_display(XMesaDisplay *dpy);
/**
}
+/**
+ * Return pointer to XMesaContext corresponding to a Mesa GLcontext.
+ * Since we're using structure containment, it's just a cast!.
+ * XXX should use inlined function for better type safety.
+ */
+static INLINE XMesaContext
+XMESA_CONTEXT(GLcontext *ctx)
+{
+ return (XMesaContext) ctx;
+}
+
+
+/**
+ * Return pointer to XMesaBuffer corresponding to a Mesa GLframebuffer.
+ * Since we're using structure containment, it's just a cast!.
+ * XXX should use inlined function for better type safety.
+ */
+static INLINE XMesaBuffer
+XMESA_BUFFER(GLframebuffer *b)
+{
+ return (XMesaBuffer) b;
+}
+
+
/* Plugged into the software rasterizer. Try to use internal
* swrast-style point, line and triangle functions.
*/
projects / platform / upstream / mesa.git / commitdiff