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"),
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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_initialize_context_extra(GLcontext
*ctx
);
121 _mesa_free_context_data( GLcontext
*ctx
);
124 _mesa_destroy_context( GLcontext
*ctx
);
128 _mesa_copy_context(const GLcontext
*src
, GLcontext
*dst
, GLuint mask
);
132 _mesa_make_current( GLcontext
*ctx
, GLframebuffer
*drawBuffer
,
133 GLframebuffer
*readBuffer
);
136 _mesa_share_state(GLcontext
*ctx
, GLcontext
*ctxToShare
);
139 _mesa_get_current_context(void);
145 _mesa_notifySwapBuffers(__GLcontext
*gc
);
148 extern struct _glapi_table
*
149 _mesa_get_dispatch(GLcontext
*ctx
);
153 /** \name Miscellaneous */
157 _mesa_record_error( GLcontext
*ctx
, GLenum error
);
159 extern void GLAPIENTRY
160 _mesa_Finish( void );
162 extern void GLAPIENTRY
170 * \name Macros for flushing buffered rendering commands before state changes,
171 * checking if inside glBegin/glEnd, etc.
178 * \param ctx GL context.
179 * \param newstate new state.
181 * Checks if dd_function_table::NeedFlush is marked to flush stored vertices,
182 * and calls dd_function_table::FlushVertices if so. Marks
183 * __GLcontextRec::NewState with \p newstate.
185 #define FLUSH_VERTICES(ctx, newstate) \
187 if (MESA_VERBOSE & VERBOSE_STATE) \
188 _mesa_debug(ctx, "FLUSH_VERTICES in %s\n", MESA_FUNCTION);\
189 if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) \
190 ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES); \
191 ctx->NewState |= newstate; \
195 * Flush current state.
197 * \param ctx GL context.
198 * \param newstate new state.
200 * Checks if dd_function_table::NeedFlush is marked to flush current state,
201 * and calls dd_function_table::FlushVertices if so. Marks
202 * __GLcontextRec::NewState with \p newstate.
204 #define FLUSH_CURRENT(ctx, newstate) \
206 if (MESA_VERBOSE & VERBOSE_STATE) \
207 _mesa_debug(ctx, "FLUSH_CURRENT in %s\n", MESA_FUNCTION); \
208 if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) \
209 ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT); \
210 ctx->NewState |= newstate; \
214 * Macro to assert that the API call was made outside the
215 * glBegin()/glEnd() pair, with return value.
217 * \param ctx GL context.
218 * \param retval value to return value in case the assertion fails.
220 #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval) \
222 if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
223 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
229 * Macro to assert that the API call was made outside the
230 * glBegin()/glEnd() pair.
232 * \param ctx GL context.
234 #define ASSERT_OUTSIDE_BEGIN_END(ctx) \
236 if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \
237 _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \
243 * Macro to assert that the API call was made outside the
244 * glBegin()/glEnd() pair and flush the vertices.
246 * \param ctx GL context.
248 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx) \
250 ASSERT_OUTSIDE_BEGIN_END(ctx); \
251 FLUSH_VERTICES(ctx, 0); \
255 * Macro to assert that the API call was made outside the
256 * glBegin()/glEnd() pair and flush the vertices, with return value.
258 * \param ctx GL context.
259 * \param retval value to return value in case the assertion fails.
261 #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval) \
263 ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval); \
264 FLUSH_VERTICES(ctx, 0); \
272 * Is the secondary color needed?
274 #define NEED_SECONDARY_COLOR(CTX) \
275 (((CTX)->Light.Enabled && \
276 (CTX)->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR) \
277 || (CTX)->Fog.ColorSumEnabled \
278 || ((CTX)->VertexProgram._Current && \
279 ((CTX)->VertexProgram._Current != (CTX)->VertexProgram._TnlProgram) && \
280 ((CTX)->VertexProgram._Current->Base.InputsRead & VERT_BIT_COLOR1)) \
281 || ((CTX)->FragmentProgram._Current && \
282 ((CTX)->FragmentProgram._Current != (CTX)->FragmentProgram._TexEnvProgram) && \
283 ((CTX)->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_COL1)) \
288 * Is RGBA LogicOp enabled?
290 #define RGBA_LOGICOP_ENABLED(CTX) \
291 ((CTX)->Color.ColorLogicOpEnabled || \
292 ((CTX)->Color.BlendEnabled && (CTX)->Color.BlendEquationRGB == GL_LOGIC_OP))
295 #endif /* CONTEXT_H */