2 * Mesa 3-D graphics library
4 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
6 * Permission is hereby granted, free of charge, to any person obtaining a
7 * copy of this software and associated documentation files (the "Software"),
8 * to deal in the Software without restriction, including without limitation
9 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
10 * and/or sell copies of the Software, and to permit persons to whom the
11 * Software is furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included
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17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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28 * Mesa context and visual-related functions.
30 * There are three large Mesa data types/classes which are meant to be
31 * used by device drivers:
32 * - struct gl_context: this contains the Mesa rendering state
33 * - struct gl_config: this describes the color buffer (RGB vs. ci), whether
34 * or not there's a depth buffer, stencil buffer, etc.
35 * - struct gl_framebuffer: contains pointers to the depth buffer, stencil
36 * buffer, accum buffer and alpha buffers.
38 * These types should be encapsulated by corresponding device driver
39 * data types. See xmesa.h and xmesaP.h for an example.
41 * In OOP terms, struct gl_context, struct gl_config, and struct gl_framebuffer
42 * are base classes which the device driver must derive from.
44 * The following functions create and destroy these data types.
54 #include "extensions.h"
67 /** \name Visual-related functions */
70 extern struct gl_config
*
71 _mesa_create_visual( GLboolean dbFlag
,
86 _mesa_initialize_visual( struct gl_config
*v
,
102 _mesa_destroy_visual( struct gl_config
*vis
);
107 /** \name Context-related functions */
111 _mesa_initialize(void);
114 _mesa_initialize_context( struct gl_context
*ctx
,
116 const struct gl_config
*visual
,
117 struct gl_context
*share_list
,
118 const struct dd_function_table
*driverFunctions
);
121 _mesa_free_context_data(struct gl_context
*ctx
);
124 _mesa_destroy_context( struct gl_context
*ctx
);
128 _mesa_copy_context(const struct gl_context
*src
, struct gl_context
*dst
, GLuint mask
);
131 _mesa_make_current( struct gl_context
*ctx
, struct gl_framebuffer
*drawBuffer
,
132 struct gl_framebuffer
*readBuffer
);
135 _mesa_share_state(struct gl_context
*ctx
, struct gl_context
*ctxToShare
);
137 extern struct gl_context
*
138 _mesa_get_current_context(void);
143 _mesa_init_constants(struct gl_constants
*consts
, gl_api api
);
146 _mesa_notifySwapBuffers(struct gl_context
*gc
);
149 extern struct _glapi_table
*
150 _mesa_get_dispatch(struct gl_context
*ctx
);
153 _mesa_set_context_lost_dispatch(struct gl_context
*ctx
);
157 /** \name Miscellaneous */
161 _mesa_flush(struct gl_context
*ctx
);
163 extern void GLAPIENTRY
164 _mesa_Finish( void );
166 extern void GLAPIENTRY
173 * Are we currently between glBegin and glEnd?
174 * During execution, not display list compilation.
176 static inline GLboolean
177 _mesa_inside_begin_end(const struct gl_context
*ctx
)
179 return ctx
->Driver
.CurrentExecPrimitive
!= PRIM_OUTSIDE_BEGIN_END
;
184 * Are we currently between glBegin and glEnd in a display list?
186 static inline GLboolean
187 _mesa_inside_dlist_begin_end(const struct gl_context
*ctx
)
189 return ctx
->Driver
.CurrentSavePrimitive
<= PRIM_MAX
;
195 * \name Macros for flushing buffered rendering commands before state changes,
196 * checking if inside glBegin/glEnd, etc.
203 * \param ctx GL context.
204 * \param newstate new state.
206 * Checks if dd_function_table::NeedFlush is marked to flush stored vertices,
207 * and calls dd_function_table::FlushVertices if so. Marks
208 * __struct gl_contextRec::NewState with \p newstate.
210 #define FLUSH_VERTICES(ctx, newstate) \
212 if (MESA_VERBOSE & VERBOSE_STATE) \
213 _mesa_debug(ctx, "FLUSH_VERTICES in %s\n", __func__); \
214 if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) \
215 vbo_exec_FlushVertices(ctx, FLUSH_STORED_VERTICES); \
216 ctx->NewState |= newstate; \
220 * Flush current state.
222 * \param ctx GL context.
223 * \param newstate new state.
225 * Checks if dd_function_table::NeedFlush is marked to flush current state,
226 * and calls dd_function_table::FlushVertices if so. Marks
227 * __struct gl_contextRec::NewState with \p newstate.
229 #define FLUSH_CURRENT(ctx, newstate) \
231 if (MESA_VERBOSE & VERBOSE_STATE) \
232 _mesa_debug(ctx, "FLUSH_CURRENT in %s\n", __func__); \
233 if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) \
234 vbo_exec_FlushVertices(ctx, FLUSH_UPDATE_CURRENT); \
235 ctx->NewState |= newstate; \
241 * \param ctx GL context.
243 * Checks if dd_function_table::NeedFlush is marked to flush stored vertices
244 * or current state and calls dd_function_table::FlushVertices if so.
246 #define FLUSH_FOR_DRAW(ctx) \
248 if (MESA_VERBOSE & VERBOSE_STATE) \
249 _mesa_debug(ctx, "FLUSH_FOR_DRAW in %s\n", __func__); \
250 if (ctx->Driver.NeedFlush) { \
251 if (ctx->_AllowDrawOutOfOrder) { \
252 if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) \
253 vbo_exec_FlushVertices(ctx, FLUSH_UPDATE_CURRENT); \
255 vbo_exec_FlushVertices(ctx, ctx->Driver.NeedFlush); \
261 * Macro to assert that the API call was made outside the
262 * glBegin()/glEnd() pair, with return value.
264 * \param ctx GL context.
265 * \param retval value to return in case the assertion fails.
267 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval) \
269 if (_mesa_inside_begin_end(ctx)) { \
270 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
276 * Macro to assert that the API call was made outside the
277 * glBegin()/glEnd() pair.
279 * \param ctx GL context.
281 #define ASSERT_OUTSIDE_BEGIN_END(ctx) \
283 if (_mesa_inside_begin_end(ctx)) { \
284 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
293 * Checks if the context is for Desktop GL (Compatibility or Core)
296 _mesa_is_desktop_gl(const struct gl_context
*ctx
)
298 return ctx
->API
== API_OPENGL_COMPAT
|| ctx
->API
== API_OPENGL_CORE
;
303 * Checks if the context is for any GLES version
306 _mesa_is_gles(const struct gl_context
*ctx
)
308 return ctx
->API
== API_OPENGLES
|| ctx
->API
== API_OPENGLES2
;
313 * Checks if the context is for GLES 3.0 or later
316 _mesa_is_gles3(const struct gl_context
*ctx
)
318 return ctx
->API
== API_OPENGLES2
&& ctx
->Version
>= 30;
323 * Checks if the context is for GLES 3.1 or later
326 _mesa_is_gles31(const struct gl_context
*ctx
)
328 return ctx
->API
== API_OPENGLES2
&& ctx
->Version
>= 31;
333 * Checks if the context is for GLES 3.2 or later
336 _mesa_is_gles32(const struct gl_context
*ctx
)
338 return ctx
->API
== API_OPENGLES2
&& ctx
->Version
>= 32;
343 _mesa_is_no_error_enabled(const struct gl_context
*ctx
)
345 return ctx
->Const
.ContextFlags
& GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR
;
350 _mesa_has_integer_textures(const struct gl_context
*ctx
)
352 return _mesa_has_EXT_texture_integer(ctx
) || _mesa_is_gles3(ctx
);
356 _mesa_has_half_float_textures(const struct gl_context
*ctx
)
358 return _mesa_has_ARB_texture_float(ctx
) ||
359 _mesa_has_OES_texture_half_float(ctx
) || _mesa_is_gles3(ctx
);
363 _mesa_has_float_textures(const struct gl_context
*ctx
)
365 return _mesa_has_ARB_texture_float(ctx
) ||
366 _mesa_has_OES_texture_float(ctx
) || _mesa_is_gles3(ctx
);
370 _mesa_has_texture_rgb10_a2ui(const struct gl_context
*ctx
)
372 return _mesa_has_ARB_texture_rgb10_a2ui(ctx
) || _mesa_is_gles3(ctx
);
376 _mesa_has_float_depth_buffer(const struct gl_context
*ctx
)
378 return _mesa_has_ARB_depth_buffer_float(ctx
) || _mesa_is_gles3(ctx
);
382 _mesa_has_packed_float(const struct gl_context
*ctx
)
384 return _mesa_has_EXT_packed_float(ctx
) || _mesa_is_gles3(ctx
);
388 _mesa_has_rg_textures(const struct gl_context
*ctx
)
390 return _mesa_has_ARB_texture_rg(ctx
) || _mesa_has_EXT_texture_rg(ctx
) ||
395 _mesa_has_texture_shared_exponent(const struct gl_context
*ctx
)
397 return _mesa_has_EXT_texture_shared_exponent(ctx
) || _mesa_is_gles3(ctx
);
401 _mesa_has_texture_type_2_10_10_10_REV(const struct gl_context
*ctx
)
403 return _mesa_is_desktop_gl(ctx
) ||
404 _mesa_has_EXT_texture_type_2_10_10_10_REV(ctx
);
408 * Checks if the context supports geometry shaders.
411 _mesa_has_geometry_shaders(const struct gl_context
*ctx
)
413 return _mesa_has_OES_geometry_shader(ctx
) ||
414 (_mesa_is_desktop_gl(ctx
) && ctx
->Version
>= 32);
419 * Checks if the context supports compute shaders.
422 _mesa_has_compute_shaders(const struct gl_context
*ctx
)
424 return _mesa_has_ARB_compute_shader(ctx
) ||
425 (ctx
->API
== API_OPENGLES2
&& ctx
->Version
>= 31);
429 * Checks if the context supports tessellation.
432 _mesa_has_tessellation(const struct gl_context
*ctx
)
434 /* _mesa_has_EXT_tessellation_shader(ctx) is redundant with the OES
435 * check, so don't bother calling it.
437 return _mesa_has_OES_tessellation_shader(ctx
) ||
438 _mesa_has_ARB_tessellation_shader(ctx
);
442 _mesa_has_texture_cube_map_array(const struct gl_context
*ctx
)
444 return _mesa_has_ARB_texture_cube_map_array(ctx
) ||
445 _mesa_has_OES_texture_cube_map_array(ctx
);
449 _mesa_has_texture_view(const struct gl_context
*ctx
)
451 return _mesa_has_ARB_texture_view(ctx
) ||
452 _mesa_has_OES_texture_view(ctx
);
460 #endif /* CONTEXT_H */