src/gallium/state_trackers/glx/xlib/xm_api.h

   1 /*
   2  * Mesa 3-D graphics library
   3  * Version:  7.1
   4  *
   5  * Copyright (C) 1999-2007  Brian Paul   All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the "Software"),
   9  * to deal in the Software without restriction, including without limitation
  10  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  11  * and/or sell copies of the Software, and to permit persons to whom the
  12  * Software is furnished to do so, subject to the following conditions:
  13  *
  14  * The above copyright notice and this permission notice shall be included
  15  * in all copies or substantial portions of the Software.
  16  *
  17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  18  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  20  * BRIAN PAUL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
  21  * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  22  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  23  */
  24
  25
  26
  27 /* Sample Usage:
  28
  29 In addition to the usual X calls to select a visual, create a colormap
  30 and create a window, you must do the following to use the X/Mesa interface:
  31
  32 1. Call XMesaCreateVisual() to make an XMesaVisual from an XVisualInfo.
  33
  34 2. Call XMesaCreateContext() to create an X/Mesa rendering context, given
  35    the XMesaVisual.
  36
  37 3. Call XMesaCreateWindowBuffer() to create an XMesaBuffer from an X window
  38    and XMesaVisual.
  39
  40 4. Call XMesaMakeCurrent() to bind the XMesaBuffer to an XMesaContext and
  41    to make the context the current one.
  42
  43 5. Make gl* calls to render your graphics.
  44
  45 6. Use XMesaSwapBuffers() when double buffering to swap front/back buffers.
  46
  47 7. Before the X window is destroyed, call XMesaDestroyBuffer().
  48
  49 8. Before exiting, call XMesaDestroyVisual and XMesaDestroyContext.
  50
  51 */
  52
  53
  54
  55
  56 #ifndef XMESA_H
  57 #define XMESA_H
  58
  59
  60 #include "main/core.h" /* for gl_config */
  61 #include "state_tracker/st_api.h"
  62 #include "os/os_thread.h"
  63
  64 #include "state_tracker/xlib_sw_winsys.h"
  65
  66 # include <X11/Xlib.h>
  67 # include <X11/Xlibint.h>
  68 # include <X11/Xutil.h>
  69
  70 typedef struct xmesa_display *XMesaDisplay;
  71 typedef struct xmesa_buffer *XMesaBuffer;
  72 typedef struct xmesa_context *XMesaContext;
  73 typedef struct xmesa_visual *XMesaVisual;
  74
  75
  76 struct xmesa_display {
  77    pipe_mutex mutex;
  78
  79    Display *display;
  80    struct pipe_screen *screen;
  81    struct st_manager *smapi;
  82
  83    struct pipe_context *pipe;
  84 };
  85
  86
  87 /*
  88  * Create a new X/Mesa visual.
  89  * Input:  display - X11 display
  90  *         visinfo - an XVisualInfo pointer
  91  *         rgb_flag - GL_TRUE = RGB mode,
  92  *                    GL_FALSE = color index mode
  93  *         alpha_flag - alpha buffer requested?
  94  *         db_flag - GL_TRUE = double-buffered,
  95  *                   GL_FALSE = single buffered
  96  *         stereo_flag - stereo visual?
  97  *         ximage_flag - GL_TRUE = use an XImage for back buffer,
  98  *                       GL_FALSE = use an off-screen pixmap for back buffer
  99  *         depth_size - requested bits/depth values, or zero
 100  *         stencil_size - requested bits/stencil values, or zero
 101  *         accum_red_size - requested bits/red accum values, or zero
 102  *         accum_green_size - requested bits/green accum values, or zero
 103  *         accum_blue_size - requested bits/blue accum values, or zero
 104  *         accum_alpha_size - requested bits/alpha accum values, or zero
 105  *         num_samples - number of samples/pixel if multisampling, or zero
 106  *         level - visual level, usually 0
 107  *         visualCaveat - ala the GLX extension, usually GLX_NONE_EXT
 108  * Return;  a new XMesaVisual or 0 if error.
 109  */
 110 extern XMesaVisual XMesaCreateVisual( Display *display,
 111                                       XVisualInfo * visinfo,
 112                                       GLboolean rgb_flag,
 113                                       GLboolean alpha_flag,
 114                                       GLboolean db_flag,
 115                                       GLboolean stereo_flag,
 116                                       GLboolean ximage_flag,
 117                                       GLint depth_size,
 118                                       GLint stencil_size,
 119                                       GLint accum_red_size,
 120                                       GLint accum_green_size,
 121                                       GLint accum_blue_size,
 122                                       GLint accum_alpha_size,
 123                                       GLint num_samples,
 124                                       GLint level,
 125                                       GLint visualCaveat );
 126
 127 /*
 128  * Destroy an XMesaVisual, but not the associated XVisualInfo.
 129  */
 130 extern void XMesaDestroyVisual( XMesaVisual v );
 131
 132
 133
 134 /*
 135  * Create a new XMesaContext for rendering into an X11 window.
 136  *
 137  * Input:  visual - an XMesaVisual
 138  *         share_list - another XMesaContext with which to share display
 139  *                      lists or NULL if no sharing is wanted.
 140  * Return:  an XMesaContext or NULL if error.
 141  */
 142 extern XMesaContext XMesaCreateContext( XMesaVisual v,
 143                                         XMesaContext share_list,
 144                                         GLuint major, GLuint minor,
 145                                         GLuint profileMask,
 146                                         GLuint contextFlags);
 147
 148
 149 /*
 150  * Destroy a rendering context as returned by XMesaCreateContext()
 151  */
 152 extern void XMesaDestroyContext( XMesaContext c );
 153
 154
 155
 156 /*
 157  * Create an XMesaBuffer from an X window.
 158  */
 159 extern XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, Window w );
 160
 161
 162 /*
 163  * Create an XMesaBuffer from an X pixmap.
 164  */
 165 extern XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v,
 166                                             Pixmap p,
 167                                             Colormap cmap );
 168
 169
 170 /*
 171  * Destroy an XMesaBuffer, but not the corresponding window or pixmap.
 172  */
 173 extern void XMesaDestroyBuffer( XMesaBuffer b );
 174
 175
 176 /*
 177  * Return the XMesaBuffer handle which corresponds to an X drawable, if any.
 178  *
 179  * New in Mesa 2.3.
 180  */
 181 extern XMesaBuffer XMesaFindBuffer( Display *dpy,
 182                                     Drawable d );
 183
 184
 185
 186 /*
 187  * Bind two buffers (read and draw) to a context and make the
 188  * context the current one.
 189  * New in Mesa 3.3
 190  */
 191 extern GLboolean XMesaMakeCurrent2( XMesaContext c,
 192                                     XMesaBuffer drawBuffer,
 193                                     XMesaBuffer readBuffer );
 194
 195
 196 /*
 197  * Unbind the current context from its buffer.
 198  */
 199 extern GLboolean XMesaUnbindContext( XMesaContext c );
 200
 201
 202 /*
 203  * Return a handle to the current context.
 204  */
 205 extern XMesaContext XMesaGetCurrentContext( void );
 206
 207
 208 /*
 209  * Swap the front and back buffers for the given buffer.  No action is
 210  * taken if the buffer is not double buffered.
 211  */
 212 extern void XMesaSwapBuffers( XMesaBuffer b );
 213
 214
 215 /*
 216  * Copy a sub-region of the back buffer to the front buffer.
 217  *
 218  * New in Mesa 2.6
 219  */
 220 extern void XMesaCopySubBuffer( XMesaBuffer b,
 221                                 int x,
 222                                 int y,
 223                                 int width,
 224                                 int height );
 225
 226
 227
 228
 229
 230 /*
 231  * Flush/sync a context
 232  */
 233 extern void XMesaFlush( XMesaContext c );
 234
 235
 236
 237 /*
 238  * Scan for XMesaBuffers whose window/pixmap has been destroyed, then free
 239  * any memory used by that buffer.
 240  *
 241  * New in Mesa 2.3.
 242  */
 243 extern void XMesaGarbageCollect( void );
 244
 245
 246
 247 /*
 248  * Create a pbuffer.
 249  * New in Mesa 4.1
 250  */
 251 extern XMesaBuffer XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
 252                                       unsigned int width, unsigned int height);
 253
 254
 255
 256 /*
 257  * Texture from Pixmap
 258  * New in Mesa 7.1
 259  */
 260 extern void
 261 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
 262                   const int *attrib_list);
 263
 264 extern void
 265 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer);
 266
 267
 268 extern XMesaBuffer
 269 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
 270                                Colormap cmap,
 271                                int format, int target, int mipmap);
 272
 273
 274 extern void
 275 XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask);
 276
 277
 278 /***********************************************************************
 279  */
 280
 281 /**
 282  * Visual inforation, derived from GLvisual.
 283  * Basically corresponds to an XVisualInfo.
 284  */
 285 struct xmesa_visual {
 286    struct gl_config mesa_visual;/* Device independent visual parameters */
 287    int screen, visualID, visualType;
 288    Display *display;    /* The X11 display */
 289    XVisualInfo * visinfo;       /* X's visual info (pointer to private copy) */
 290    XVisualInfo *vishandle;      /* Only used in fakeglx.c */
 291    GLint BitsPerPixel;          /* True bits per pixel for XImages */
 292
 293    GLboolean ximage_flag;       /* Use XImage for back buffer (not pixmap)? */
 294
 295    struct st_visual stvis;
 296 };
 297
 298
 299 /**
 300  * Context info, derived from st_context.
 301  * Basically corresponds to a GLXContext.
 302  */
 303 struct xmesa_context {
 304    struct st_context_iface *st;
 305    XMesaVisual xm_visual;       /** pixel format info */
 306    XMesaBuffer xm_buffer;       /** current drawbuffer */
 307    XMesaBuffer xm_read_buffer;  /** current readbuffer */
 308 };
 309
 310
 311 /**
 312  * Types of X/GLX drawables we might render into.
 313  */
 314 typedef enum {
 315    WINDOW,          /* An X window */
 316    GLXWINDOW,       /* GLX window */
 317    PIXMAP,          /* GLX pixmap */
 318    PBUFFER          /* GLX Pbuffer */
 319 } BufferType;
 320
 321
 322 /**
 323  * Framebuffer information, derived from.
 324  * Basically corresponds to a GLXDrawable.
 325  */
 326 struct xmesa_buffer {
 327    struct st_framebuffer_iface *stfb;
 328    struct xlib_drawable ws;
 329
 330    GLboolean wasCurrent;        /* was ever the current buffer? */
 331    XMesaVisual xm_visual;       /* the X/Mesa visual */
 332    Colormap cmap;               /* the X colormap */
 333    BufferType type;             /* window, pixmap, pbuffer or glxwindow */
 334
 335    GLboolean largestPbuffer;    /**< for pbuffers */
 336    GLboolean preservedContents; /**< for pbuffers */
 337
 338    XImage *tempImage;
 339    unsigned long selectedEvents;/* for pbuffers only */
 340
 341
 342    GC gc;                       /* scratch GC for span, line, tri drawing */
 343
 344    /* GLX_EXT_texture_from_pixmap */
 345    GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
 346    GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
 347    GLint TextureMipmap; /** 0 or 1 */
 348
 349    struct xmesa_buffer *Next;   /* Linked list pointer: */
 350
 351    unsigned width, height;
 352 };
 353
 354
 355
 356 extern const char *
 357 xmesa_get_name(void);
 358
 359 extern void
 360 xmesa_init(Display *dpy);
 361
 362 extern XMesaBuffer
 363 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis);
 364
 365 extern void
 366 xmesa_get_window_size(Display *dpy, XMesaBuffer b,
 367                       GLuint *width, GLuint *height);
 368
 369 extern void
 370 xmesa_notify_invalid_buffer(XMesaBuffer b);
 371
 372 extern void
 373 xmesa_check_buffer_size(XMesaBuffer b);
 374
 375 extern void
 376 xmesa_destroy_buffers_on_display(Display *dpy);
 377
 378 static INLINE GLuint
 379 xmesa_buffer_width(XMesaBuffer b)
 380 {
 381    return b->width;
 382 }
 383
 384 static INLINE GLuint
 385 xmesa_buffer_height(XMesaBuffer b)
 386 {
 387    return b->height;
 388 }
 389
 390 extern boolean xmesa_strict_invalidate;
 391
 392 #endif