2 * Mesa 3-D graphics library
5 * Copyright (C) 1999-2006 Brian Paul All Rights Reserved.
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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.
52 #include "glapi/glapi.h"
57 /** \name Visual-related functions */
61 _mesa_create_visual( GLboolean rgbFlag
,
78 _mesa_initialize_visual( GLvisual
*v
,
96 _mesa_destroy_visual( GLvisual
*vis
);
101 /** \name Context-related functions */
105 _mesa_create_context( const GLvisual
*visual
,
106 GLcontext
*share_list
,
107 const struct dd_function_table
*driverFunctions
,
108 void *driverContext
);
111 _mesa_initialize_context( GLcontext
*ctx
,
112 const GLvisual
*visual
,
113 GLcontext
*share_list
,
114 const struct dd_function_table
*driverFunctions
,
115 void *driverContext
);
118 _mesa_free_context_data( GLcontext
*ctx
);
121 _mesa_destroy_context( GLcontext
*ctx
);
125 _mesa_copy_context(const GLcontext
*src
, GLcontext
*dst
, GLuint mask
);
129 _mesa_make_current( GLcontext
*ctx
, GLframebuffer
*drawBuffer
,
130 GLframebuffer
*readBuffer
);
133 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
);
136 _mesa_get_current_context(void);
142 _mesa_notifySwapBuffers(__GLcontext
*gc
);
145 extern struct _glapi_table
*
146 _mesa_get_dispatch(GLcontext
*ctx
);
150 /** \name Miscellaneous */
154 _mesa_record_error( GLcontext
*ctx
, GLenum error
);
156 extern void GLAPIENTRY
157 _mesa_Finish( void );
159 extern void GLAPIENTRY
167 * \name Macros for flushing buffered rendering commands before state changes,
168 * checking if inside glBegin/glEnd, etc.
175 * \param ctx GL context.
176 * \param newstate new state.
178 * Checks if dd_function_table::NeedFlush is marked to flush stored vertices,
179 * and calls dd_function_table::FlushVertices if so. Marks
180 * __GLcontextRec::NewState with \p newstate.
182 #define FLUSH_VERTICES(ctx, newstate) \
184 if (MESA_VERBOSE & VERBOSE_STATE) \
185 _mesa_debug(ctx, "FLUSH_VERTICES in %s\n", MESA_FUNCTION);\
186 if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) \
187 ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES); \
188 ctx->NewState |= newstate; \
192 * Flush current state.
194 * \param ctx GL context.
195 * \param newstate new state.
197 * Checks if dd_function_table::NeedFlush is marked to flush current state,
198 * and calls dd_function_table::FlushVertices if so. Marks
199 * __GLcontextRec::NewState with \p newstate.
201 #define FLUSH_CURRENT(ctx, newstate) \
203 if (MESA_VERBOSE & VERBOSE_STATE) \
204 _mesa_debug(ctx, "FLUSH_CURRENT in %s\n", MESA_FUNCTION); \
205 if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) \
206 ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT); \
207 ctx->NewState |= newstate; \
211 * Macro to assert that the API call was made outside the
212 * glBegin()/glEnd() pair, with return value.
214 * \param ctx GL context.
215 * \param retval value to return value in case the assertion fails.
217 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval) \
219 if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
220 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
226 * Macro to assert that the API call was made outside the
227 * glBegin()/glEnd() pair.
229 * \param ctx GL context.
231 #define ASSERT_OUTSIDE_BEGIN_END(ctx) \
233 if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
234 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
240 * Macro to assert that the API call was made outside the
241 * glBegin()/glEnd() pair and flush the vertices.
243 * \param ctx GL context.
245 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx) \
247 ASSERT_OUTSIDE_BEGIN_END(ctx); \
248 FLUSH_VERTICES(ctx, 0); \
252 * Macro to assert that the API call was made outside the
253 * glBegin()/glEnd() pair and flush the vertices, with return value.
255 * \param ctx GL context.
256 * \param retval value to return value in case the assertion fails.
258 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval) \
260 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval); \
261 FLUSH_VERTICES(ctx, 0); \
269 * Is the secondary color needed?
271 #define NEED_SECONDARY_COLOR(CTX) \
272 (((CTX)->Light.Enabled && \
273 (CTX)->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR) \
274 || (CTX)->Fog.ColorSumEnabled \
275 || ((CTX)->VertexProgram._Current && \
276 ((CTX)->VertexProgram._Current->Base.InputsRead & VERT_BIT_COLOR1)) \
277 || ((CTX)->FragmentProgram._Current && \
278 ((CTX)->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_COL1)) \
283 * Is RGBA LogicOp enabled?
285 #define RGBA_LOGICOP_ENABLED(CTX) \
286 ((CTX)->Color.ColorLogicOpEnabled || \
287 ((CTX)->Color.BlendEnabled && (CTX)->Color.BlendEquationRGB == GL_LOGIC_OP))
290 #endif /* CONTEXT_H */