2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2007 Brian Paul All Rights Reserved.
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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:
32 1. Call XMesaCreateVisual() to make an XMesaVisual from an XVisualInfo.
34 2. Call XMesaCreateContext() to create an X/Mesa rendering context, given
37 3. Call XMesaCreateWindowBuffer() to create an XMesaBuffer from an X window
40 4. Call XMesaMakeCurrent() to bind the XMesaBuffer to an XMesaContext and
41 to make the context the current one.
43 5. Make gl* calls to render your graphics.
45 6. Use XMesaSwapBuffers() when double buffering to swap front/back buffers.
47 7. Before the X window is destroyed, call XMesaDestroyBuffer().
49 8. Before exiting, call XMesaDestroyVisual and XMesaDestroyContext.
60 #include "main/core.h" /* for gl_config */
61 #include "state_tracker/st_api.h"
62 #include "os/os_thread.h"
64 #include "state_tracker/xlib_sw_winsys.h"
66 # include <X11/Xlib.h>
67 # include <X11/Xlibint.h>
68 # include <X11/Xutil.h>
70 typedef struct xmesa_display *XMesaDisplay;
71 typedef struct xmesa_buffer *XMesaBuffer;
72 typedef struct xmesa_context *XMesaContext;
73 typedef struct xmesa_visual *XMesaVisual;
76 struct xmesa_display {
80 struct pipe_screen *screen;
81 struct st_manager *smapi;
83 struct pipe_context *pipe;
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.
110 extern XMesaVisual XMesaCreateVisual( Display *display,
111 XVisualInfo * visinfo,
113 GLboolean alpha_flag,
115 GLboolean stereo_flag,
116 GLboolean ximage_flag,
119 GLint accum_red_size,
120 GLint accum_green_size,
121 GLint accum_blue_size,
122 GLint accum_alpha_size,
125 GLint visualCaveat );
128 * Destroy an XMesaVisual, but not the associated XVisualInfo.
130 extern void XMesaDestroyVisual( XMesaVisual v );
135 * Create a new XMesaContext for rendering into an X11 window.
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.
142 extern XMesaContext XMesaCreateContext( XMesaVisual v,
143 XMesaContext share_list,
144 GLuint major, GLuint minor,
146 GLuint contextFlags);
150 * Destroy a rendering context as returned by XMesaCreateContext()
152 extern void XMesaDestroyContext( XMesaContext c );
157 * Create an XMesaBuffer from an X window.
159 extern XMesaBuffer XMesaCreateWindowBuffer( XMesaVisual v, Window w );
163 * Create an XMesaBuffer from an X pixmap.
165 extern XMesaBuffer XMesaCreatePixmapBuffer( XMesaVisual v,
171 * Destroy an XMesaBuffer, but not the corresponding window or pixmap.
173 extern void XMesaDestroyBuffer( XMesaBuffer b );
177 * Return the XMesaBuffer handle which corresponds to an X drawable, if any.
181 extern XMesaBuffer XMesaFindBuffer( Display *dpy,
187 * Bind two buffers (read and draw) to a context and make the
188 * context the current one.
191 extern GLboolean XMesaMakeCurrent2( XMesaContext c,
192 XMesaBuffer drawBuffer,
193 XMesaBuffer readBuffer );
197 * Unbind the current context from its buffer.
199 extern GLboolean XMesaUnbindContext( XMesaContext c );
203 * Return a handle to the current context.
205 extern XMesaContext XMesaGetCurrentContext( void );
209 * Swap the front and back buffers for the given buffer. No action is
210 * taken if the buffer is not double buffered.
212 extern void XMesaSwapBuffers( XMesaBuffer b );
216 * Copy a sub-region of the back buffer to the front buffer.
220 extern void XMesaCopySubBuffer( XMesaBuffer b,
231 * Flush/sync a context
233 extern void XMesaFlush( XMesaContext c );
238 * Scan for XMesaBuffers whose window/pixmap has been destroyed, then free
239 * any memory used by that buffer.
243 extern void XMesaGarbageCollect( void );
251 extern XMesaBuffer XMesaCreatePBuffer(XMesaVisual v, Colormap cmap,
252 unsigned int width, unsigned int height);
257 * Texture from Pixmap
261 XMesaBindTexImage(Display *dpy, XMesaBuffer drawable, int buffer,
262 const int *attrib_list);
265 XMesaReleaseTexImage(Display *dpy, XMesaBuffer drawable, int buffer);
269 XMesaCreatePixmapTextureBuffer(XMesaVisual v, Pixmap p,
271 int format, int target, int mipmap);
275 XMesaCopyContext(XMesaContext src, XMesaContext dst, unsigned long mask);
278 /***********************************************************************
282 * Visual inforation, derived from GLvisual.
283 * Basically corresponds to an XVisualInfo.
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 */
293 GLboolean ximage_flag; /* Use XImage for back buffer (not pixmap)? */
295 struct st_visual stvis;
300 * Context info, derived from st_context.
301 * Basically corresponds to a GLXContext.
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 */
312 * Types of X/GLX drawables we might render into.
315 WINDOW, /* An X window */
316 GLXWINDOW, /* GLX window */
317 PIXMAP, /* GLX pixmap */
318 PBUFFER /* GLX Pbuffer */
323 * Framebuffer information, derived from.
324 * Basically corresponds to a GLXDrawable.
326 struct xmesa_buffer {
327 struct st_framebuffer_iface *stfb;
328 struct xlib_drawable ws;
330 GLboolean wasCurrent; /* was ever the current buffer? */
331 XMesaVisual xm_visual; /* the X/Mesa visual */
332 Drawable drawable; /* Usually the X window ID */
333 Colormap cmap; /* the X colormap */
334 BufferType type; /* window, pixmap, pbuffer or glxwindow */
336 GLboolean largestPbuffer; /**< for pbuffers */
337 GLboolean preservedContents; /**< for pbuffers */
340 unsigned long selectedEvents;/* for pbuffers only */
343 GC gc; /* scratch GC for span, line, tri drawing */
345 /* GLX_EXT_texture_from_pixmap */
346 GLint TextureTarget; /** GLX_TEXTURE_1D_EXT, for example */
347 GLint TextureFormat; /** GLX_TEXTURE_FORMAT_RGB_EXT, for example */
348 GLint TextureMipmap; /** 0 or 1 */
350 struct xmesa_buffer *Next; /* Linked list pointer: */
352 unsigned width, height;
358 xmesa_get_name(void);
361 xmesa_init(Display *dpy);
364 xmesa_find_buffer(Display *dpy, Colormap cmap, XMesaBuffer notThis);
367 xmesa_get_window_size(Display *dpy, XMesaBuffer b,
368 GLuint *width, GLuint *height);
371 xmesa_notify_invalid_buffer(XMesaBuffer b);
374 xmesa_check_buffer_size(XMesaBuffer b);
377 xmesa_destroy_buffers_on_display(Display *dpy);
380 xmesa_buffer_width(XMesaBuffer b)
386 xmesa_buffer_height(XMesaBuffer b)
391 extern boolean xmesa_strict_invalidate;