2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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
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14 * The above copyright notice and this permission notice shall be included
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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 * - GLcontext: this contains the Mesa rendering state
33 * - GLvisual: this describes the color buffer (RGB vs. ci), whether or not
34 * there's a depth buffer, stencil buffer, etc.
35 * - GLframebuffer: contains pointers to the depth buffer, stencil buffer,
36 * 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, GLcontext, GLvisual, and GLframebuffer are base classes
42 * which the device driver must derive from.
44 * The following functions create and destroy these data types.
59 /** \name Visual-related functions */
63 _mesa_create_visual( GLboolean rgbFlag
,
80 _mesa_initialize_visual( GLvisual
*v
,
98 _mesa_destroy_visual( GLvisual
*vis
);
103 /** \name Context-related functions */
107 _mesa_create_context( const GLvisual
*visual
,
108 GLcontext
*share_list
,
109 const struct dd_function_table
*driverFunctions
,
110 void *driverContext
);
113 _mesa_initialize_context( GLcontext
*ctx
,
114 const GLvisual
*visual
,
115 GLcontext
*share_list
,
116 const struct dd_function_table
*driverFunctions
,
117 void *driverContext
);
120 _mesa_initialize_context_extra(GLcontext
*ctx
);
123 _mesa_free_context_data( GLcontext
*ctx
);
126 _mesa_destroy_context( GLcontext
*ctx
);
130 _mesa_copy_context(const GLcontext
*src
, GLcontext
*dst
, GLuint mask
);
134 _mesa_make_current( GLcontext
*ctx
, GLframebuffer
*drawBuffer
,
135 GLframebuffer
*readBuffer
);
138 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
);
141 _mesa_get_current_context(void);
147 _mesa_notifySwapBuffers(__GLcontext
*gc
);
150 extern struct _glapi_table
*
151 _mesa_get_dispatch(GLcontext
*ctx
);
155 _mesa_set_mvp_with_dp4( GLcontext
*ctx
,
159 /** \name Miscellaneous */
163 _mesa_record_error( GLcontext
*ctx
, GLenum error
);
165 extern void GLAPIENTRY
166 _mesa_Finish( void );
168 extern void GLAPIENTRY
176 * \name Macros for flushing buffered rendering commands before state changes,
177 * checking if inside glBegin/glEnd, etc.
184 * \param ctx GL context.
185 * \param newstate new state.
187 * Checks if dd_function_table::NeedFlush is marked to flush stored vertices,
188 * and calls dd_function_table::FlushVertices if so. Marks
189 * __GLcontextRec::NewState with \p newstate.
191 #define FLUSH_VERTICES(ctx, newstate) \
193 if (MESA_VERBOSE & VERBOSE_STATE) \
194 _mesa_debug(ctx, "FLUSH_VERTICES in %s\n", MESA_FUNCTION);\
195 if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) \
196 ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES); \
197 ctx->NewState |= newstate; \
201 * Flush current state.
203 * \param ctx GL context.
204 * \param newstate new state.
206 * Checks if dd_function_table::NeedFlush is marked to flush current state,
207 * and calls dd_function_table::FlushVertices if so. Marks
208 * __GLcontextRec::NewState with \p newstate.
210 #define FLUSH_CURRENT(ctx, newstate) \
212 if (MESA_VERBOSE & VERBOSE_STATE) \
213 _mesa_debug(ctx, "FLUSH_CURRENT in %s\n", MESA_FUNCTION); \
214 if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) \
215 ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT); \
216 ctx->NewState |= newstate; \
220 * Macro to assert that the API call was made outside the
221 * glBegin()/glEnd() pair, with return value.
223 * \param ctx GL context.
224 * \param retval value to return value in case the assertion fails.
226 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval) \
228 if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
229 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
235 * Macro to assert that the API call was made outside the
236 * glBegin()/glEnd() pair.
238 * \param ctx GL context.
240 #define ASSERT_OUTSIDE_BEGIN_END(ctx) \
242 if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
243 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
249 * Macro to assert that the API call was made outside the
250 * glBegin()/glEnd() pair and flush the vertices.
252 * \param ctx GL context.
254 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx) \
256 ASSERT_OUTSIDE_BEGIN_END(ctx); \
257 FLUSH_VERTICES(ctx, 0); \
261 * Macro to assert that the API call was made outside the
262 * glBegin()/glEnd() pair and flush the vertices, with return value.
264 * \param ctx GL context.
265 * \param retval value to return value in case the assertion fails.
267 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval) \
269 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval); \
270 FLUSH_VERTICES(ctx, 0); \
278 * Is the secondary color needed?
280 #define NEED_SECONDARY_COLOR(CTX) \
281 (((CTX)->Light.Enabled && \
282 (CTX)->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR) \
283 || (CTX)->Fog.ColorSumEnabled \
284 || ((CTX)->VertexProgram._Current && \
285 ((CTX)->VertexProgram._Current != (CTX)->VertexProgram._TnlProgram) && \
286 ((CTX)->VertexProgram._Current->Base.InputsRead & VERT_BIT_COLOR1)) \
287 || ((CTX)->FragmentProgram._Current && \
288 ((CTX)->FragmentProgram._Current != (CTX)->FragmentProgram._TexEnvProgram) && \
289 ((CTX)->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_COL1)) \
294 * Is RGBA LogicOp enabled?
296 #define RGBA_LOGICOP_ENABLED(CTX) \
297 ((CTX)->Color.ColorLogicOpEnabled || \
298 ((CTX)->Color.BlendEnabled && (CTX)->Color.BlendEquationRGB == GL_LOGIC_OP))
301 #endif /* CONTEXT_H */