/*
* Mesa 3-D graphics library
* Version: 7.1
*
* Copyright (C) 1999-2007 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"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included
* in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* \file xm_api.c
*
* All the XMesa* API functions.
*
*
* NOTES:
*
* The window coordinate system origin (0,0) is in the lower-left corner
* of the window. X11's window coordinate origin is in the upper-left
* corner of the window. Therefore, most drawing functions in this
* file have to flip Y coordinates.
*
*
* Byte swapping: If the Mesa host and the X display use a different
* byte order then there's some trickiness to be aware of when using
* XImages. The byte ordering used for the XImage is that of the X
* display, not the Mesa host.
* The color-to-pixel encoding for True/DirectColor must be done
* according to the display's visual red_mask, green_mask, and blue_mask.
* If XPutPixel is used to put a pixel into an XImage then XPutPixel will
* do byte swapping if needed. If one wants to directly "poke" the pixel
* into the XImage's buffer then the pixel must be byte swapped first.
*
*/
#ifdef __CYGWIN__
#undef WIN32
#undef __WIN32__
#endif
#include "xm_api.h"
#include "xm_st.h"
#include "pipe/p_context.h"
#include "pipe/p_defines.h"
#include "pipe/p_screen.h"
#include "pipe/p_state.h"
#include "util/u_atomic.h"
#include "util/u_inlines.h"
#include "xm_public.h"
#include <GL/glx.h>
/* Driver interface routines, set up by xlib backend on library
* _init(). These are global in the same way that function names are
* global.
*/
static struct xm_driver driver;
static struct st_api *stapi;
/* Default strict invalidate to false. This means we will not call
* XGetGeometry after every swapbuffers, which allows swapbuffers to
* remain asynchronous. For apps running at 100fps with synchronous
* swapping, a 10% boost is typical. For gears, I see closer to 20%
* speedup.
*
* Note that the work of copying data on swapbuffers doesn't disappear
* - this change just allows the X server to execute the PutImage
* asynchronously without us effectively blocked until its completion.
*
* This speeds up even llvmpipe's threaded rasterization as the
* swapbuffers operation was a large part of the serial component of
* an llvmpipe frame.
*
* The downside of this is correctness - applications which don't call
* glViewport on window resizes will get incorrect rendering. A
* better solution would be to have per-frame but asynchronous
* invalidation. Xcb almost looks as if it could provide this, but
* the API doesn't seem to quite be there.
*/
boolean xmesa_strict_invalidate = FALSE;
void xmesa_set_driver( const struct xm_driver *templ )
{
driver = *templ;
stapi = driver.create_st_api();
xmesa_strict_invalidate =
debug_get_bool_option("XMESA_STRICT_INVALIDATE", FALSE);
}
/*
* XXX replace this with a linked list, or better yet, try to attach the
* gallium/mesa extra bits to the X Display object with XAddExtension().
*/
#define MAX_DISPLAYS 10
static struct xmesa_display Displays[MAX_DISPLAYS];
static int NumDisplays = 0;
static int
xmesa_get_param(struct st_manager *smapi,
enum st_manager_param param)
{
switch(param) {
case ST_MANAGER_BROKEN_INVALIDATE:
return !xmesa_strict_invalidate;
default:
return 0;
}
}
static XMesaDisplay
xmesa_init_display( Display *display )
{
pipe_static_mutex(init_mutex);
XMesaDisplay xmdpy;
int i;
pipe_mutex_lock(init_mutex);
/* Look for XMesaDisplay which corresponds to 'display' */
for (i = 0; i < NumDisplays; i++) {
if (Displays[i].display == display) {
/* Found it */
pipe_mutex_unlock(init_mutex);
return &Displays[i];
}
}
/* Create new XMesaDisplay */
assert(NumDisplays < MAX_DISPLAYS);
xmdpy = &Displays[NumDisplays];
NumDisplays++;
if (!xmdpy->display && display) {
xmdpy->display = display;
xmdpy->screen = driver.create_pipe_screen(display);
xmdpy->smapi = CALLOC_STRUCT(st_manager);
if (xmdpy->smapi) {
xmdpy->smapi->screen = xmdpy->screen;
xmdpy->smapi->get_param = xmesa_get_param;
}
if (xmdpy->screen && xmdpy->smapi) {
pipe_mutex_init(xmdpy->mutex);
}
else {
if (xmdpy->screen) {
xmdpy->screen->destroy(xmdpy->screen);
xmdpy->screen = NULL;
}
if (xmdpy->smapi) {
FREE(xmdpy->smapi);
xmdpy->smapi = NULL;
}
xmdpy->display = NULL;
}
}
if (!xmdpy->display || xmdpy->display != display)
xmdpy = NULL;
pipe_mutex_unlock(init_mutex);
return xmdpy;
}
/**********************************************************************/
/***** X Utility Functions *****/
/**********************************************************************/
/**
* Return the host's byte order as LSBFirst or MSBFirst ala X.
*/
static int host_byte_order( void )
{
int i = 1;
char *cptr = (char *) &i;
return (*cptr==1) ? LSBFirst : MSBFirst;
}
/**
* 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.
* Input: dpy - the X display
* visinfo - desribes the visual to be used for XImages
* Return: true number of bits per pixel for XImages
*/
static int
bits_per_pixel( XMesaVisual xmv )
{
Display *dpy = xmv->display;
XVisualInfo * visinfo = xmv->visinfo;
XImage *img;
int bitsPerPixel;
/* Create a temporary XImage */
img = XCreateImage( dpy, visinfo->visual, visinfo->depth,
ZPixmap, 0, /*format, offset*/
(char*) MALLOC(8), /*data*/
1, 1, /*width, height*/
32, /*bitmap_pad*/
0 /*bytes_per_line*/
);
assert(img);
/* grab the bits/pixel value */
bitsPerPixel = img->bits_per_pixel;
/* free the XImage */
free( img->data );
img->data = NULL;
XDestroyImage( img );
return bitsPerPixel;
}
/*
* Determine if a given X window ID is valid (window exists).
* Do this by calling XGetWindowAttributes() for the window and
* checking if we catch an X error.
* Input: dpy - the display
* win - the window to check for existance
* Return: GL_TRUE - window exists
* GL_FALSE - window doesn't exist
*/
static GLboolean WindowExistsFlag;
static int window_exists_err_handler( Display* dpy, XErrorEvent* xerr )
{
(void) dpy;
if (xerr->error_code == BadWindow) {
WindowExistsFlag = GL_FALSE;
}
return 0;
}
static GLboolean window_exists( Display *dpy, Window win )
{
XWindowAttributes wa;
int (*old_handler)( Display*, XErrorEvent* );
WindowExistsFlag = GL_TRUE;
old_handler = XSetErrorHandler(window_exists_err_handler);
XGetWindowAttributes( dpy, win, &wa ); /* dummy request */
XSetErrorHandler(old_handler);
return WindowExistsFlag;
}
static Status
get_drawable_size( Display *dpy, Drawable d, uint *width, uint *height )
{
Window root;
Status stat;
int xpos, ypos;
unsigned int w, h, bw, depth;
stat = XGetGeometry(dpy, d, &root, &xpos, &ypos, &w, &h, &bw, &depth);
*width = w;
*height = h;
return stat;
}
/**
* 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(Display *dpy, XMesaBuffer b,
GLuint *width, GLuint *height)
{
XMesaDisplay xmdpy = xmesa_init_display(dpy);
Status stat;
pipe_mutex_lock(xmdpy->mutex);
stat = get_drawable_size(dpy, b->ws.drawable, width, height);
pipe_mutex_unlock(xmdpy->mutex);
if (!stat) {
/* probably querying a window that's recently been destroyed */
_mesa_warning(NULL, "XGetGeometry failed!\n");
*width = *height = 1;
}
}
#define GET_REDMASK(__v) __v->mesa_visual.redMask
#define GET_GREENMASK(__v) __v->mesa_visual.greenMask
#define GET_BLUEMASK(__v) __v->mesa_visual.blueMask
/**
* Choose the pixel format for the given visual.
* This will tell the gallium driver how to pack pixel data into
* drawing surfaces.
*/
static GLuint
choose_pixel_format(XMesaVisual v)
{
boolean native_byte_order = (host_byte_order() ==
ImageByteOrder(v->display));
if ( GET_REDMASK(v) == 0x0000ff
&& GET_GREENMASK(v) == 0x00ff00
&& GET_BLUEMASK(v) == 0xff0000
&& v->BitsPerPixel == 32) {
if (native_byte_order) {
/* no byteswapping needed */
return PIPE_FORMAT_R8G8B8A8_UNORM;
}
else {
return PIPE_FORMAT_A8B8G8R8_UNORM;
}
}
else if ( GET_REDMASK(v) == 0xff0000
&& GET_GREENMASK(v) == 0x00ff00
&& GET_BLUEMASK(v) == 0x0000ff
&& v->BitsPerPixel == 32) {
if (native_byte_order) {
/* no byteswapping needed */
return PIPE_FORMAT_B8G8R8A8_UNORM;
}
else {
return PIPE_FORMAT_A8R8G8B8_UNORM;
}
}
else if ( GET_REDMASK(v) == 0x0000ff00
&& GET_GREENMASK(v) == 0x00ff0000
&& GET_BLUEMASK(v) == 0xff000000
&& v->BitsPerPixel == 32) {
if (native_byte_order) {
/* no byteswapping needed */
return PIPE_FORMAT_A8R8G8B8_UNORM;
}
else {
return PIPE_FORMAT_B8G8R8A8_UNORM;
}
}
else if ( GET_REDMASK(v) == 0xf800
&& GET_GREENMASK(v) == 0x07e0
&& GET_BLUEMASK(v) == 0x001f
&& native_byte_order
&& v->BitsPerPixel == 16) {
/* 5-6-5 RGB */
return PIPE_FORMAT_B5G6R5_UNORM;
}
return PIPE_FORMAT_NONE;
}
/**
* Choose a depth/stencil format that satisfies the given depth and
* stencil sizes.
*/
static enum pipe_format
choose_depth_stencil_format(XMesaDisplay xmdpy, int depth, int stencil)
{
const enum pipe_texture_target target = PIPE_TEXTURE_2D;
const unsigned tex_usage = PIPE_BIND_DEPTH_STENCIL;
const unsigned sample_count = 0;
enum pipe_format formats[8], fmt;
int count, i;
count = 0;
if (depth <= 16 && stencil == 0) {
formats[count++] = PIPE_FORMAT_Z16_UNORM;
}
if (depth <= 24 && stencil == 0) {
formats[count++] = PIPE_FORMAT_X8Z24_UNORM;
formats[count++] = PIPE_FORMAT_Z24X8_UNORM;
}
if (depth <= 24 && stencil <= 8) {
formats[count++] = PIPE_FORMAT_S8_UINT_Z24_UNORM;
formats[count++] = PIPE_FORMAT_Z24_UNORM_S8_UINT;
}
if (depth <= 32 && stencil == 0) {
formats[count++] = PIPE_FORMAT_Z32_UNORM;
}
fmt = PIPE_FORMAT_NONE;
for (i = 0; i < count; i++) {
if (xmdpy->screen->is_format_supported(xmdpy->screen, formats[i],
target, sample_count,
tex_usage)) {
fmt = formats[i];
break;
}
}
return fmt;
}
/**********************************************************************/
/***** Linked list of XMesaBuffers *****/
/**********************************************************************/
static XMesaBuffer XMesaBufferList = NULL;
/**
* Allocate a new XMesaBuffer object which corresponds to the given drawable.
* Note that XMesaBuffer is derived from struct gl_framebuffer.
* 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
create_xmesa_buffer(Drawable d, BufferType type,
XMesaVisual vis, Colormap cmap)
{
XMesaDisplay xmdpy = xmesa_init_display(vis->display);
XMesaBuffer b;
uint width, height;
ASSERT(type == WINDOW || type == PIXMAP || type == PBUFFER);
if (!xmdpy)
return NULL;
b = (XMesaBuffer) CALLOC_STRUCT(xmesa_buffer);
if (!b)
return NULL;
b->ws.drawable = d;
b->ws.visual = vis->visinfo->visual;
b->ws.depth = vis->visinfo->depth;
b->xm_visual = vis;
b->type = type;
b->cmap = cmap;
get_drawable_size(vis->display, d, &width, &height);
/*
* Create framebuffer, but we'll plug in our own renderbuffers below.
*/
b->stfb = xmesa_create_st_framebuffer(xmdpy, b);
/* GLX_EXT_texture_from_pixmap */
b->TextureTarget = 0;
b->TextureFormat = GLX_TEXTURE_FORMAT_NONE_EXT;
b->TextureMipmap = 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.
*/
XMesaBuffer
xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis)
{
XMesaBuffer b;
for (b = XMesaBufferList; b; b = b->Next) {
if (b->xm_visual->display == dpy &&
b->cmap == cmap &&
b != notThis) {
return b;
}
}
return NULL;
}
/**
* Remove buffer from linked list, delete if no longer referenced.
*/
static void
xmesa_free_buffer(XMesaBuffer buffer)
{
XMesaBuffer prev = NULL, b;
for (b = XMesaBufferList; b; b = b->Next) {
if (b == buffer) {
/* unlink buffer from list */
if (prev)
prev->Next = buffer->Next;
else
XMesaBufferList = buffer->Next;
/* Since the X window for the XMesaBuffer is going away, we don't
* want to dereference this pointer in the future.
*/
b->ws.drawable = 0;
/* XXX we should move the buffer to a delete-pending list and destroy
* the buffer until it is no longer current.
*/
xmesa_destroy_st_framebuffer(buffer->stfb);
free(buffer);
return;
}
/* continue search */
prev = b;
}
/* buffer not found in XMesaBufferList */
_mesa_problem(NULL,"xmesa_free_buffer() - buffer not found\n");
}
/**********************************************************************/
/***** Misc Private Functions *****/
/**********************************************************************/
/**
* When a context is bound for the first time, we can finally finish
* initializing the context's visual and buffer information.
* \param v the XMesaVisual to initialize
* \param b the XMesaBuffer to initialize (may be NULL)
* \param rgb_flag TRUE = RGBA mode, FALSE = color index mode
* \param window the window/pixmap we're rendering into
* \param cmap the colormap associated with the window/pixmap
* \return GL_TRUE=success, GL_FALSE=failure
*/
static GLboolean
initialize_visual_and_buffer(XMesaVisual v, XMesaBuffer b,
GLboolean rgb_flag, Drawable window,
Colormap cmap)
{
ASSERT(!b || b->xm_visual == v);
/* Save true bits/pixel */
v->BitsPerPixel = bits_per_pixel(v);
assert(v->BitsPerPixel > 0);
if (rgb_flag == GL_FALSE) {
/* COLOR-INDEXED WINDOW: not supported*/
return GL_FALSE;
}
else {
/* RGB WINDOW:
* We support RGB rendering into almost any kind of visual.
*/
const int xclass = v->visualType;
if (xclass != GLX_TRUE_COLOR && xclass == !GLX_DIRECT_COLOR) {
_mesa_warning(NULL,
"XMesa: RGB mode rendering not supported in given visual.\n");
return GL_FALSE;
}
v->mesa_visual.indexBits = 0;
if (v->BitsPerPixel == 32) {
/* We use XImages for all front/back buffers. If an X Window or
* X Pixmap is 32bpp, there's no guarantee that the alpha channel
* will be preserved. For XImages we're in luck.
*/
v->mesa_visual.alphaBits = 8;
}
}
/*
* If MESA_INFO env var is set print out some debugging info
* which can help Brian figure out what's going on when a user
* reports bugs.
*/
if (_mesa_getenv("MESA_INFO")) {
printf("X/Mesa visual = %p\n", (void *) v);
printf("X/Mesa level = %d\n", v->mesa_visual.level);
printf("X/Mesa depth = %d\n", v->visinfo->depth);
printf("X/Mesa bits per pixel = %d\n", v->BitsPerPixel);
}
return GL_TRUE;
}
#define NUM_VISUAL_TYPES 6
/**
* Convert an X visual type to a GLX visual type.
*
* \param visualType X visual type (i.e., \c TrueColor, \c StaticGray, etc.)
* to be converted.
* \return If \c visualType is a valid X visual type, a GLX visual type will
* be returned. Otherwise \c GLX_NONE will be returned.
*
* \note
* This code was lifted directly from lib/GL/glx/glcontextmodes.c in the
* DRI CVS tree.
*/
static GLint
xmesa_convert_from_x_visual_type( int visualType )
{
static const int glx_visual_types[ NUM_VISUAL_TYPES ] = {
GLX_STATIC_GRAY, GLX_GRAY_SCALE,
GLX_STATIC_COLOR, GLX_PSEUDO_COLOR,
GLX_TRUE_COLOR, GLX_DIRECT_COLOR
};
return ( (unsigned) visualType < NUM_VISUAL_TYPES )
? glx_visual_types[ visualType ] : GLX_NONE;
}
/**********************************************************************/
/***** Public Functions *****/
/**********************************************************************/
/*
* Create a new X/Mesa visual.
* Input: display - X11 display
* visinfo - an XVisualInfo pointer
* rgb_flag - GL_TRUE = RGB mode,
* GL_FALSE = color index mode
* alpha_flag - alpha buffer requested?
* db_flag - GL_TRUE = double-buffered,
* GL_FALSE = single buffered
* stereo_flag - stereo visual?
* ximage_flag - GL_TRUE = use an XImage for back buffer,
* GL_FALSE = use an off-screen pixmap for back buffer
* depth_size - requested bits/depth values, or zero
* stencil_size - requested bits/stencil values, or zero
* accum_red_size - requested bits/red accum values, or zero
* accum_green_size - requested bits/green accum values, or zero
* accum_blue_size - requested bits/blue accum values, or zero
* accum_alpha_size - requested bits/alpha accum values, or zero
* num_samples - number of samples/pixel if multisampling, or zero
* level - visual level, usually 0
* visualCaveat - ala the GLX extension, usually GLX_NONE
* Return; a new XMesaVisual or 0 if error.
*/
PUBLIC
XMesaVisual XMesaCreateVisual( Display *display,
XVisualInfo * visinfo,
GLboolean rgb_flag,
GLboolean alpha_flag,
GLboolean db_flag,
GLboolean stereo_flag,
GLboolean ximage_flag,
GLint depth_size,
GLint stencil_size,
GLint accum_red_size,
GLint accum_green_size,
GLint accum_blue_size,
GLint accum_alpha_size,
GLint num_samples,
GLint level,
GLint visualCaveat )
{
XMesaDisplay xmdpy = xmesa_init_display(display);
XMesaVisual v;
GLint red_bits, green_bits, blue_bits, alpha_bits;
if (!xmdpy)
return NULL;
/* For debugging only */
if (_mesa_getenv("MESA_XSYNC")) {
/* This makes debugging X easier.
* In your debugger, set a breakpoint on _XError to stop when an
* X protocol error is generated.
*/
XSynchronize( display, 1 );
}
v = (XMesaVisual) CALLOC_STRUCT(xmesa_visual);
if (!v) {
return NULL;
}
v->display = display;
/* Save a copy of the XVisualInfo struct because the user may Xfree()
* the struct but we may need some of the information contained in it
* at a later time.
*/
v->visinfo = (XVisualInfo *) MALLOC(sizeof(*visinfo));
if (!v->visinfo) {
free(v);
return NULL;
}
memcpy(v->visinfo, visinfo, sizeof(*visinfo));
v->ximage_flag = ximage_flag;
v->mesa_visual.redMask = visinfo->red_mask;
v->mesa_visual.greenMask = visinfo->green_mask;
v->mesa_visual.blueMask = visinfo->blue_mask;
v->visualID = visinfo->visualid;
v->screen = visinfo->screen;
#if !(defined(__cplusplus) || defined(c_plusplus))
v->visualType = xmesa_convert_from_x_visual_type(visinfo->class);
#else
v->visualType = xmesa_convert_from_x_visual_type(visinfo->c_class);
#endif
v->mesa_visual.visualRating = visualCaveat;
if (alpha_flag)
v->mesa_visual.alphaBits = 8;
(void) initialize_visual_and_buffer( v, NULL, rgb_flag, 0, 0 );
{
const int xclass = v->visualType;
if (xclass == GLX_TRUE_COLOR || xclass == GLX_DIRECT_COLOR) {
red_bits = _mesa_bitcount(GET_REDMASK(v));
green_bits = _mesa_bitcount(GET_GREENMASK(v));
blue_bits = _mesa_bitcount(GET_BLUEMASK(v));
}
else {
/* this is an approximation */
int depth;
depth = v->visinfo->depth;
red_bits = depth / 3;
depth -= red_bits;
green_bits = depth / 2;
depth -= green_bits;
blue_bits = depth;
alpha_bits = 0;
assert( red_bits + green_bits + blue_bits == v->visinfo->depth );
}
alpha_bits = v->mesa_visual.alphaBits;
}
/* initialize visual */
{
struct gl_config *vis = &v->mesa_visual;
vis->rgbMode = GL_TRUE;
vis->doubleBufferMode = db_flag;
vis->stereoMode = stereo_flag;
vis->redBits = red_bits;
vis->greenBits = green_bits;
vis->blueBits = blue_bits;
vis->alphaBits = alpha_bits;
vis->rgbBits = red_bits + green_bits + blue_bits;
vis->indexBits = 0;
vis->depthBits = depth_size;
vis->stencilBits = stencil_size;
vis->accumRedBits = accum_red_size;
vis->accumGreenBits = accum_green_size;
vis->accumBlueBits = accum_blue_size;
vis->accumAlphaBits = accum_alpha_size;
vis->haveAccumBuffer = accum_red_size > 0;
vis->haveDepthBuffer = depth_size > 0;
vis->haveStencilBuffer = stencil_size > 0;
vis->numAuxBuffers = 0;
vis->level = 0;
vis->sampleBuffers = 0;
vis->samples = 0;
}
v->stvis.buffer_mask = ST_ATTACHMENT_FRONT_LEFT_MASK;
if (db_flag)
v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_LEFT_MASK;
if (stereo_flag) {
v->stvis.buffer_mask |= ST_ATTACHMENT_FRONT_RIGHT_MASK;
if (db_flag)
v->stvis.buffer_mask |= ST_ATTACHMENT_BACK_RIGHT_MASK;
}
v->stvis.color_format = choose_pixel_format(v);
if (v->stvis.color_format == PIPE_FORMAT_NONE) {
FREE(v->visinfo);
FREE(v);
return NULL;
}
v->stvis.depth_stencil_format =
choose_depth_stencil_format(xmdpy, depth_size, stencil_size);
v->stvis.accum_format = (accum_red_size +
accum_green_size + accum_blue_size + accum_alpha_size) ?
PIPE_FORMAT_R16G16B16A16_SNORM : PIPE_FORMAT_NONE;
v->stvis.samples = num_samples;
v->stvis.render_buffer = ST_ATTACHMENT_INVALID;
/* XXX minor hack */
v->mesa_visual.level = level;
return v;
}
PUBLIC
void XMesaDestroyVisual( XMesaVisual v )
{
free(v->visinfo);
free(v);
}
/**
* Return the informative name.
*/
const char *
xmesa_get_name(void)
{
return stapi->name;
}
/**
* Do per-display initializations.
*/
void
xmesa_init( Display *display )
{
xmesa_init_display(display);
}
/**
* Create a new XMesaContext.
* \param v the XMesaVisual
* \param share_list another XMesaContext with which to share display
* lists or NULL if no sharing is wanted.
* \return an XMesaContext or NULL if error.
*/
PUBLIC
XMesaContext XMesaCreateContext( XMesaVisual v, XMesaContext share_list,
GLuint major, GLuint minor,
GLuint profileMask, GLuint contextFlags)
{
XMesaDisplay xmdpy = xmesa_init_display(v->display);
struct st_context_attribs attribs;
enum st_context_error ctx_err = 0;
XMesaContext c;
if (!xmdpy)
return NULL;
/* Note: the XMesaContext contains a Mesa struct gl_context struct (inheritance) */
c = (XMesaContext) CALLOC_STRUCT(xmesa_context);
if (!c)
return NULL;
c->xm_visual = v;
c->xm_buffer = NULL; /* set later by XMesaMakeCurrent */
c->xm_read_buffer = NULL;
memset(&attribs, 0, sizeof(attribs));
attribs.visual = v->stvis;
attribs.major = major;
attribs.minor = minor;
if (contextFlags & GLX_CONTEXT_FORWARD_COMPATIBLE_BIT_ARB)
attribs.flags |= ST_CONTEXT_FLAG_FORWARD_COMPATIBLE;
if (contextFlags & GLX_CONTEXT_DEBUG_BIT_ARB)
attribs.flags |= ST_CONTEXT_FLAG_DEBUG;
if (contextFlags & GLX_CONTEXT_ROBUST_ACCESS_BIT_ARB)
attribs.flags |= ST_CONTEXT_FLAG_ROBUST_ACCESS;
/* There are no profiles before OpenGL 3.2. The
* GLX_ARB_create_context_profile spec says:
*
* "If the requested OpenGL version is less than 3.2,
* GLX_CONTEXT_PROFILE_MASK_ARB is ignored and the functionality of the
* context is determined solely by the requested version."
*
* The spec also says:
*
* "The default value for GLX_CONTEXT_PROFILE_MASK_ARB is
* GLX_CONTEXT_CORE_PROFILE_BIT_ARB."
*/
attribs.profile = ST_PROFILE_DEFAULT;
if ((major > 3 || (major == 3 && minor >= 2))
&& ((profileMask & GLX_CONTEXT_COMPATIBILITY_PROFILE_BIT_ARB) == 0))
attribs.profile = ST_PROFILE_OPENGL_CORE;
c->st = stapi->create_context(stapi, xmdpy->smapi, &attribs,
&ctx_err, (share_list) ? share_list->st : NULL);
if (c->st == NULL)
goto fail;
c->st->st_manager_private = (void *) c;
return c;
fail:
if (c->st)
c->st->destroy(c->st);
free(c);
return NULL;
}
PUBLIC
void XMesaDestroyContext( XMesaContext c )
{
c->st->destroy(c->st);
/* FIXME: We should destroy the screen here, but if we do so, surfaces may
* outlive it, causing segfaults
struct pipe_screen *screen = c->st->pipe->screen;
screen->destroy(screen);
*/
free(c);
}
/**
* 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;
}
/**
* 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, Pixmap p, Colormap cmap)
{
XMesaBuffer b;
assert(v);
b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
if (!b)
return NULL;
if (!initialize_visual_and_buffer(v, b, v->mesa_visual.rgbMode,
(Drawable) p, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
/**
* For GLX_EXT_texture_from_pixmap
*/
XMesaBuffer
XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
Colormap cmap,
int format, int target, int mipmap)
{
GET_CURRENT_CONTEXT(ctx);
XMesaBuffer b;
assert(v);
b = create_xmesa_buffer((Drawable) p, PIXMAP, v, cmap);
if (!b)
return NULL;
/* get pixmap size */
xmesa_get_window_size(v->display, b, &b->width, &b->height);
if (target == 0) {
/* examine dims */
if (ctx->Extensions.ARB_texture_non_power_of_two) {
target = GLX_TEXTURE_2D_EXT;
}
else if ( _mesa_bitcount(b->width) == 1
&& _mesa_bitcount(b->height) == 1) {
/* power of two size */
if (b->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, v->mesa_visual.rgbMode,
(Drawable) p, cmap)) {
xmesa_free_buffer(b);
return NULL;
}
return b;
}
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;
}
/*
* Deallocate an XMesaBuffer structure and all related info.
*/
PUBLIC void
XMesaDestroyBuffer(XMesaBuffer b)
{
xmesa_free_buffer(b);
}
/**
* Notify the binding context to validate the buffer.
*/
void
xmesa_notify_invalid_buffer(XMesaBuffer b)
{
p_atomic_inc(&b->stfb->stamp);
}
/**
* Query the current drawable size and notify the binding context.
*/
void
xmesa_check_buffer_size(XMesaBuffer b)
{
GLuint old_width, old_height;
if (b->type == PBUFFER)
return;
old_width = b->width;
old_height = b->height;
xmesa_get_window_size(b->xm_visual->display, b, &b->width, &b->height);
if (b->width != old_width || b->height != old_height)
xmesa_notify_invalid_buffer(b);
}
/*
* 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;
}
/*
* Unbind the context c from its buffer.
*/
GLboolean XMesaUnbindContext( XMesaContext c )
{
/* A no-op for XFree86 integration purposes */
return GL_TRUE;
}
XMesaContext XMesaGetCurrentContext( void )
{
struct st_context_iface *st = stapi->get_current(stapi);
return (XMesaContext) (st) ? st->st_manager_private : NULL;
}
/**
* Swap front and back color buffers and have winsys display front buffer.
* If there's no front color buffer no swap actually occurs.
*/
PUBLIC
void XMesaSwapBuffers( XMesaBuffer b )
{
XMesaContext xmctx = XMesaGetCurrentContext();
if (xmctx && xmctx->xm_buffer == b) {
xmctx->st->flush( xmctx->st, ST_FLUSH_FRONT, NULL);
}
xmesa_swap_st_framebuffer(b->stfb);
}
/*
* Copy sub-region of back buffer to front buffer
*/
void XMesaCopySubBuffer( XMesaBuffer b, int x, int y, int width, int height )
{
xmesa_copy_st_framebuffer(b->stfb,
ST_ATTACHMENT_BACK_LEFT, ST_ATTACHMENT_FRONT_LEFT,
x, y, width, height);
}
void XMesaFlush( XMesaContext c )
{
if (c && c->xm_visual->display) {
XMesaDisplay xmdpy = xmesa_init_display(c->xm_visual->display);
struct pipe_fence_handle *fence = NULL;
c->st->flush(c->st, ST_FLUSH_FRONT, &fence);
if (fence) {
xmdpy->screen->fence_finish(xmdpy->screen, fence,
PIPE_TIMEOUT_INFINITE);
xmdpy->screen->fence_reference(xmdpy->screen, &fence, NULL);
}
XFlush( c->xm_visual->display );
}
}
XMesaBuffer XMesaFindBuffer( Display *dpy, Drawable d )
{
XMesaBuffer b;
for (b = XMesaBufferList; b; b = b->Next) {
if (b->ws.drawable == d && b->xm_visual->display == dpy) {
return b;
}
}
return NULL;
}
/**
* Free/destroy all XMesaBuffers associated with given display.
*/
void xmesa_destroy_buffers_on_display(Display *dpy)
{
XMesaBuffer b, next;
for (b = XMesaBufferList; b; b = next) {
next = b->Next;
if (b->xm_visual->display == dpy) {
xmesa_free_buffer(b);
/* delete head of list? */
if (XMesaBufferList == b) {
XMesaBufferList = next;
}
}
}
}
/*
* Look for XMesaBuffers whose X window has been destroyed.
* Deallocate any such XMesaBuffers.
*/
void XMesaGarbageCollect( void )
{
XMesaBuffer b, next;
for (b=XMesaBufferList; b; b=next) {
next = b->Next;
if (b->xm_visual &&
b->xm_visual->display &&
b->ws.drawable &&
b->type == WINDOW) {
XSync(b->xm_visual->display, False);
if (!window_exists( b->xm_visual->display, b->ws.drawable )) {
/* found a dead window, free the ancillary info */
XMesaDestroyBuffer( b );
}
}
}
}
static enum st_attachment_type xmesa_attachment_type(int glx_attachment)
{
switch(glx_attachment) {
case GLX_FRONT_LEFT_EXT:
return ST_ATTACHMENT_FRONT_LEFT;
case GLX_FRONT_RIGHT_EXT:
return ST_ATTACHMENT_FRONT_RIGHT;
case GLX_BACK_LEFT_EXT:
return ST_ATTACHMENT_BACK_LEFT;
case GLX_BACK_RIGHT_EXT:
return ST_ATTACHMENT_BACK_RIGHT;
default:
assert(0);
return ST_ATTACHMENT_FRONT_LEFT;
}
}
PUBLIC void
XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
const int *attrib_list)
{
struct st_context_iface *st = stapi->get_current(stapi);
struct st_framebuffer_iface* stfbi = drawable->stfb;
struct pipe_resource *res;
int x, y, w, h;
enum st_attachment_type st_attachment = xmesa_attachment_type(buffer);
x = 0;
y = 0;
w = drawable->width;
h = drawable->height;
/* We need to validate our attachments before using them,
* in case the texture doesn't exist yet. */
xmesa_st_framebuffer_validate_textures(stfbi, w, h, 1 << st_attachment);
res = xmesa_get_attachment(stfbi, st_attachment);
if (res) {
struct pipe_context* pipe = xmesa_get_context(stfbi);
enum pipe_format internal_format = res->format;
struct pipe_transfer *tex_xfer;
char *map;
int line, ximage_stride;
XImage *img;
internal_format = choose_pixel_format(drawable->xm_visual);
tex_xfer = pipe_get_transfer(pipe, res,
0, 0, /* level, layer */
PIPE_TRANSFER_WRITE,
x, y,
w, h);
if (!tex_xfer)
return;
/* Grab the XImage that we want to turn into a texture. */
img = XGetImage(dpy,
drawable->ws.drawable,
x, y,
w, h,
AllPlanes,
ZPixmap);
if (!img) {
pipe_transfer_destroy(pipe, tex_xfer);
return;
}
map = pipe_transfer_map(pipe, tex_xfer);
if (!map) {
pipe_transfer_destroy(pipe, tex_xfer);
return;
}
/* The pipe transfer has a pitch rounded up to the nearest 64 pixels.
We assume 32 bit pixels. */
ximage_stride = w * 4;
for (line = 0; line < h; line++)
memcpy(&map[line * tex_xfer->stride],
&img->data[line * ximage_stride],
ximage_stride);
pipe_transfer_unmap(pipe, tex_xfer);
pipe_transfer_destroy(pipe, tex_xfer);
st->teximage(st,
ST_TEXTURE_2D,
0, /* level */
internal_format,
res,
FALSE /* no mipmap */);
}
}
PUBLIC void
XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer)
{
}
void
XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask)
{
if (dst->st->copy)
dst->st->copy(dst->st, src->st, mask);
}