Initial revision

1 files changed, 167 insertions, 0 deletions

diff --git a/src/mesa/main/context.h b/src/mesa/main/context.h
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+/* $Id: context.h,v 1.1 1999/08/19 00:55:41 jtg Exp $ */
+
+/*
+ * Mesa 3-D graphics library
+ * Version:  3.1
+ * 
+ * Copyright (C) 1999  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.
+ */
+
+
+
+
+
+#ifndef CONTEXT_H
+#define CONTEXT_H
+
+
+#include "types.h"
+
+
+
+#ifdef THREADS
+   /*
+    * A seperate GLcontext for each thread
+    */
+   extern GLcontext *gl_get_thread_context( void );
+#else
+   /*
+    * All threads use same pointer to current context.
+    */
+   extern GLcontext *CC;
+   extern struct immediate *CURRENT_INPUT;
+#endif
+
+
+
+/*
+ * There are three Mesa datatypes which are meant to be used by device
+ * drivers:
+ *   GLcontext:  this contains the Mesa rendering state
+ *   GLvisual:  this describes the color buffer (rgb vs. ci), whether
+ *              or not there's a depth buffer, stencil buffer, etc.
+ *   GLframebuffer:  contains pointers to the depth buffer, stencil
+ *                   buffer, accum buffer and alpha buffers.
+ *
+ * These types should be encapsulated by corresponding device driver
+ * datatypes.  See xmesa.h and xmesaP.h for an example.
+ *
+ * In OOP terms, GLcontext, GLvisual, and GLframebuffer are base classes
+ * which the device driver must derive from.
+ *
+ * The following functions create and destroy these datatypes.
+ */
+
+
+/*
+ * Create/destroy a GLvisual.  A GLvisual is like a GLX visual.  It describes
+ * the colorbuffer, depth buffer, stencil buffer and accum buffer which will
+ * be used by the GL context and framebuffer.
+ */
+extern GLvisual *gl_create_visual( GLboolean rgbFlag,
+                                   GLboolean alphaFlag,
+                                   GLboolean dbFlag,
+                                   GLboolean stereoFlag,
+                                   GLint depthBits,
+                                   GLint stencilBits,
+                                   GLint accumBits,
+                                   GLint indexBits,
+                                   GLint redBits,
+                                   GLint greenBits,
+                                   GLint blueBits,
+                                   GLint alphaBits );
+
+extern void gl_destroy_visual( GLvisual *vis );
+
+
+/*
+ * Create/destroy a GLcontext.  A GLcontext is like a GLX context.  It
+ * contains the rendering state.
+ */
+extern GLcontext *gl_create_context( GLvisual *visual,
+                                     GLcontext *share_list,
+                                     void *driver_ctx,
+                                     GLboolean direct);
+
+extern void gl_destroy_context( GLcontext *ctx );
+
+/* Called by the driver after both the context and driver are fully
+ * initialized.  Currently just reads the config file.
+ */
+extern void gl_context_initialize( GLcontext *ctx );
+
+/*
+ * Create/destroy a GLframebuffer.  A GLframebuffer is like a GLX drawable.
+ * It bundles up the depth buffer, stencil buffer and accum buffers into a
+ * single entity.
+ */
+extern GLframebuffer *gl_create_framebuffer( GLvisual *visual );
+
+extern void gl_destroy_framebuffer( GLframebuffer *buffer );
+
+
+
+extern void gl_make_current( GLcontext *ctx, GLframebuffer *buffer );
+
+extern GLcontext *gl_get_current_context(void);
+
+extern void gl_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask);
+
+extern void gl_set_api_table( GLcontext *ctx, const struct gl_api_table *api );
+
+
+
+/*
+ * GL_MESA_resize_buffers extension
+ */
+extern void gl_ResizeBuffersMESA( GLcontext *ctx );
+
+
+
+/*
+ * Miscellaneous
+ */
+
+extern void gl_problem( const GLcontext *ctx, const char *s );
+
+extern void gl_warning( const GLcontext *ctx, const char *s );
+
+extern void gl_error( GLcontext *ctx, GLenum error, const char *s );
+extern void gl_compile_error( GLcontext *ctx, GLenum error, const char *s );
+
+extern GLenum gl_GetError( GLcontext *ctx );
+
+
+extern void gl_update_state( GLcontext *ctx );
+
+
+/* for debugging */
+extern void gl_print_state( const char *msg, GLuint state );
+
+/* for debugging */
+extern void gl_print_enable_flags( const char *msg, GLuint flags );
+
+
+#ifdef PROFILE
+extern GLdouble gl_time( void );
+#endif
+
+
+#endif