2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
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30 In addition to the usual X calls to select a visual, create a colormap
31 and create a window, you must do the following to use the X/Mesa interface:
33 1. Call XMesaCreateVisual() to make an XMesaVisual from an XVisualInfo.
35 2. Call XMesaCreateContext() to create an X/Mesa rendering context, given
38 3. Call XMesaCreateWindowBuffer() to create an XMesaBuffer from an X window
41 4. Call XMesaMakeCurrent() to bind the XMesaBuffer to an XMesaContext and
42 to make the context the current one.
44 5. Make gl* calls to render your graphics.
46 6. Use XMesaSwapBuffers() when double buffering to swap front/back buffers.
48 7. Before the X window is destroyed, call XMesaDestroyBuffer().
50 8. Before exiting, call XMesaDestroyVisual and XMesaDestroyContext.
61 #include "main/core.h" /* for gl_config */
62 #include "state_tracker/st_api.h"
63 #include "os/os_thread.h"
65 #include "state_tracker/xlib_sw_winsys.h"
67 # include <X11/Xlib.h>
68 # include <X11/Xlibint.h>
69 # include <X11/Xutil.h>
73 typedef struct xmesa_display *XMesaDisplay;
74 typedef struct xmesa_buffer *XMesaBuffer;
75 typedef struct xmesa_context *XMesaContext;
76 typedef struct xmesa_visual *XMesaVisual;
79 struct xmesa_display {
83 struct pipe_screen *screen;
84 struct st_manager *smapi;
86 struct pipe_context *pipe;
91 * Create a new X/Mesa visual.
92 * Input: display - X11 display
93 * visinfo - an XVisualInfo pointer
94 * rgb_flag - GL_TRUE = RGB mode,
95 * GL_FALSE = color index mode
96 * alpha_flag - alpha buffer requested?
97 * db_flag - GL_TRUE = double-buffered,
98 * GL_FALSE = single buffered
99 * stereo_flag - stereo visual?
100 * ximage_flag - GL_TRUE = use an XImage for back buffer,
101 * GL_FALSE = use an off-screen pixmap for back buffer
102 * depth_size - requested bits/depth values, or zero
103 * stencil_size - requested bits/stencil values, or zero
104 * accum_red_size - requested bits/red accum values, or zero
105 * accum_green_size - requested bits/green accum values, or zero
106 * accum_blue_size - requested bits/blue accum values, or zero
107 * accum_alpha_size - requested bits/alpha accum values, or zero
108 * num_samples - number of samples/pixel if multisampling, or zero
109 * level - visual level, usually 0
110 * visualCaveat - ala the GLX extension, usually GLX_NONE_EXT
111 * Return; a new XMesaVisual or 0 if error.
113 extern XMesaVisual XMesaCreateVisual( Display *display,
114 XVisualInfo * visinfo,
116 GLboolean alpha_flag,
118 GLboolean stereo_flag,
119 GLboolean ximage_flag,
122 GLint accum_red_size,
123 GLint accum_green_size,
124 GLint accum_blue_size,
125 GLint accum_alpha_size,
128 GLint visualCaveat );
131 * Destroy an XMesaVisual, but not the associated XVisualInfo.
133 extern void XMesaDestroyVisual( XMesaVisual v );
138 * Create a new XMesaContext for rendering into an X11 window.
140 * Input: visual - an XMesaVisual
141 * share_list - another XMesaContext with which to share display
142 * lists or NULL if no sharing is wanted.
143 * Return: an XMesaContext or NULL if error.
145 extern XMesaContext XMesaCreateContext( XMesaVisual v,
146 XMesaContext share_list,
147 GLuint major, GLuint minor,
149 GLuint contextFlags);
153 * Destroy a rendering context as returned by XMesaCreateContext()
155 extern void XMesaDestroyContext( XMesaContext c );
160 * Create an XMesaBuffer from an X window.
162 extern XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, Window w );
166 * Create an XMesaBuffer from an X pixmap.
168 extern XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v,
174 * Destroy an XMesaBuffer, but not the corresponding window or pixmap.
176 extern void XMesaDestroyBuffer( XMesaBuffer b );
180 * Return the XMesaBuffer handle which corresponds to an X drawable, if any.
184 extern XMesaBuffer XMesaFindBuffer( Display *dpy,
190 * Bind two buffers (read and draw) to a context and make the
191 * context the current one.
194 extern GLboolean XMesaMakeCurrent2( XMesaContext c,
195 XMesaBuffer drawBuffer,
196 XMesaBuffer readBuffer );
200 * Unbind the current context from its buffer.
202 extern GLboolean XMesaUnbindContext( XMesaContext c );
206 * Return a handle to the current context.
208 extern XMesaContext XMesaGetCurrentContext( void );
212 * Swap the front and back buffers for the given buffer. No action is
213 * taken if the buffer is not double buffered.
215 extern void XMesaSwapBuffers( XMesaBuffer b );
219 * Copy a sub-region of the back buffer to the front buffer.
223 extern void XMesaCopySubBuffer( XMesaBuffer b,
234 * Flush/sync a context
236 extern void XMesaFlush( XMesaContext c );
241 * Scan for XMesaBuffers whose window/pixmap has been destroyed, then free
242 * any memory used by that buffer.
246 extern void XMesaGarbageCollect( void );
254 extern XMesaBuffer XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
255 unsigned int width, unsigned int height);
260 * Texture from Pixmap
264 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
265 const int *attrib_list);
268 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer);
272 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
274 int format, int target, int mipmap);
278 XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask);
281 /***********************************************************************
285 * Visual inforation, derived from GLvisual.
286 * Basically corresponds to an XVisualInfo.
288 struct xmesa_visual {
289 struct gl_config mesa_visual;/* Device independent visual parameters */
290 int screen, visualID, visualType;
291 Display *display; /* The X11 display */
292 XVisualInfo * visinfo; /* X's visual info (pointer to private copy) */
293 XVisualInfo *vishandle; /* Only used in fakeglx.c */
294 GLint BitsPerPixel; /* True bits per pixel for XImages */
296 GLboolean ximage_flag; /* Use XImage for back buffer (not pixmap)? */
298 struct st_visual stvis;
303 * Context info, derived from st_context.
304 * Basically corresponds to a GLXContext.
306 struct xmesa_context {
307 struct st_context_iface *st;
308 XMesaVisual xm_visual; /** pixel format info */
309 XMesaBuffer xm_buffer; /** current drawbuffer */
310 XMesaBuffer xm_read_buffer; /** current readbuffer */
311 struct hud_context *hud;
316 * Types of X/GLX drawables we might render into.
319 WINDOW, /* An X window */
320 GLXWINDOW, /* GLX window */
321 PIXMAP, /* GLX pixmap */
322 PBUFFER /* GLX Pbuffer */
327 * Framebuffer information, derived from.
328 * Basically corresponds to a GLXDrawable.
330 struct xmesa_buffer {
331 struct st_framebuffer_iface *stfb;
332 struct xlib_drawable ws;
334 GLboolean wasCurrent; /* was ever the current buffer? */
335 XMesaVisual xm_visual; /* the X/Mesa visual */
336 Colormap cmap; /* the X colormap */
337 BufferType type; /* window, pixmap, pbuffer or glxwindow */
339 GLboolean largestPbuffer; /**< for pbuffers */
340 GLboolean preservedContents; /**< for pbuffers */
343 unsigned long selectedEvents;/* for pbuffers only */
346 GC gc; /* scratch GC for span, line, tri drawing */
348 /* GLX_EXT_texture_from_pixmap */
349 GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
350 GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
351 GLint TextureMipmap; /** 0 or 1 */
353 struct xmesa_buffer *Next; /* Linked list pointer: */
355 unsigned width, height;
361 xmesa_get_name(void);
364 xmesa_init(Display *dpy);
367 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis);
370 xmesa_get_window_size(Display *dpy, XMesaBuffer b,
371 GLuint *width, GLuint *height);
374 xmesa_notify_invalid_buffer(XMesaBuffer b);
377 xmesa_check_buffer_size(XMesaBuffer b);
380 xmesa_destroy_buffers_on_display(Display *dpy);
383 xmesa_buffer_width(XMesaBuffer b)
389 xmesa_buffer_height(XMesaBuffer b)
394 extern boolean xmesa_strict_invalidate;