/* * Mesa 3-D graphics library * Version: 6.5.1 * * Copyright (C) 1999-2006 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. */ /** * \file context.h * Mesa context and visual-related functions. * * There are three large Mesa data types/classes 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 * data types. 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 data types. */ #ifndef CONTEXT_H #define CONTEXT_H #include "imports.h" #include "mtypes.h" struct _glapi_table; /** \name Visual-related functions */ /*@{*/ extern GLvisual * _mesa_create_visual( GLboolean dbFlag, GLboolean stereoFlag, GLint redBits, GLint greenBits, GLint blueBits, GLint alphaBits, GLint depthBits, GLint stencilBits, GLint accumRedBits, GLint accumGreenBits, GLint accumBlueBits, GLint accumAlphaBits, GLint numSamples ); extern GLboolean _mesa_initialize_visual( GLvisual *v, GLboolean dbFlag, GLboolean stereoFlag, GLint redBits, GLint greenBits, GLint blueBits, GLint alphaBits, GLint depthBits, GLint stencilBits, GLint accumRedBits, GLint accumGreenBits, GLint accumBlueBits, GLint accumAlphaBits, GLint numSamples ); extern void _mesa_destroy_visual( GLvisual *vis ); /*@}*/ /** \name Context-related functions */ /*@{*/ extern GLcontext * _mesa_create_context( const GLvisual *visual, GLcontext *share_list, const struct dd_function_table *driverFunctions, void *driverContext ); extern GLboolean _mesa_initialize_context( GLcontext *ctx, const GLvisual *visual, GLcontext *share_list, const struct dd_function_table *driverFunctions, void *driverContext ); extern GLcontext * _mesa_create_context_for_api(gl_api api, const GLvisual *visual, GLcontext *share_list, const struct dd_function_table *driverFunctions, void *driverContext); extern GLboolean _mesa_initialize_context_for_api(GLcontext *ctx, gl_api api, const GLvisual *visual, GLcontext *share_list, const struct dd_function_table *driverFunctions, void *driverContext); extern void _mesa_free_context_data( GLcontext *ctx ); extern void _mesa_destroy_context( GLcontext *ctx ); extern void _mesa_copy_context(const GLcontext *src, GLcontext *dst, GLuint mask); extern void _mesa_check_init_viewport(GLcontext *ctx, GLuint width, GLuint height); extern GLboolean _mesa_make_current( GLcontext *ctx, GLframebuffer *drawBuffer, GLframebuffer *readBuffer ); extern GLboolean _mesa_share_state(GLcontext *ctx, GLcontext *ctxToShare); extern GLcontext * _mesa_get_current_context(void); /*@}*/ extern void _mesa_init_get_hash(GLcontext *ctx); extern void _mesa_notifySwapBuffers(GLcontext *gc); extern struct _glapi_table * _mesa_get_dispatch(GLcontext *ctx); void _mesa_set_mvp_with_dp4( GLcontext *ctx, GLboolean flag ); extern GLboolean _mesa_valid_to_render(GLcontext *ctx, const char *where); /** \name Miscellaneous */ /*@{*/ extern void _mesa_record_error( GLcontext *ctx, GLenum error ); extern void _mesa_finish(GLcontext *ctx); extern void _mesa_flush(GLcontext *ctx); extern void GLAPIENTRY _mesa_Finish( void ); extern void GLAPIENTRY _mesa_Flush( void ); /*@}*/ /** * \name Macros for flushing buffered rendering commands before state changes, * checking if inside glBegin/glEnd, etc. */ /*@{*/ /** * Flush vertices. * * \param ctx GL context. * \param newstate new state. * * Checks if dd_function_table::NeedFlush is marked to flush stored vertices, * and calls dd_function_table::FlushVertices if so. Marks * __GLcontextRec::NewState with \p newstate. */ #define FLUSH_VERTICES(ctx, newstate) \ do { \ if (MESA_VERBOSE & VERBOSE_STATE) \ _mesa_debug(ctx, "FLUSH_VERTICES in %s\n", MESA_FUNCTION);\ if (ctx->Driver.NeedFlush & FLUSH_STORED_VERTICES) \ ctx->Driver.FlushVertices(ctx, FLUSH_STORED_VERTICES); \ ctx->NewState |= newstate; \ } while (0) /** * Flush current state. * * \param ctx GL context. * \param newstate new state. * * Checks if dd_function_table::NeedFlush is marked to flush current state, * and calls dd_function_table::FlushVertices if so. Marks * __GLcontextRec::NewState with \p newstate. */ #define FLUSH_CURRENT(ctx, newstate) \ do { \ if (MESA_VERBOSE & VERBOSE_STATE) \ _mesa_debug(ctx, "FLUSH_CURRENT in %s\n", MESA_FUNCTION); \ if (ctx->Driver.NeedFlush & FLUSH_UPDATE_CURRENT) \ ctx->Driver.FlushVertices(ctx, FLUSH_UPDATE_CURRENT); \ ctx->NewState |= newstate; \ } while (0) /** * Macro to assert that the API call was made outside the * glBegin()/glEnd() pair, with return value. * * \param ctx GL context. * \param retval value to return value in case the assertion fails. */ #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval) \ do { \ if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \ _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \ return retval; \ } \ } while (0) /** * Macro to assert that the API call was made outside the * glBegin()/glEnd() pair. * * \param ctx GL context. */ #define ASSERT_OUTSIDE_BEGIN_END(ctx) \ do { \ if (ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END) { \ _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \ return; \ } \ } while (0) /** * Macro to assert that the API call was made outside the * glBegin()/glEnd() pair and flush the vertices. * * \param ctx GL context. */ #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH(ctx) \ do { \ ASSERT_OUTSIDE_BEGIN_END(ctx); \ FLUSH_VERTICES(ctx, 0); \ } while (0) /** * Macro to assert that the API call was made outside the * glBegin()/glEnd() pair and flush the vertices, with return value. * * \param ctx GL context. * \param retval value to return value in case the assertion fails. */ #define ASSERT_OUTSIDE_BEGIN_END_AND_FLUSH_WITH_RETVAL(ctx, retval) \ do { \ ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval); \ FLUSH_VERTICES(ctx, 0); \ } while (0) /*@}*/ /** * Is the secondary color needed? */ #define NEED_SECONDARY_COLOR(CTX) \ (((CTX)->Light.Enabled && \ (CTX)->Light.Model.ColorControl == GL_SEPARATE_SPECULAR_COLOR) \ || (CTX)->Fog.ColorSumEnabled \ || ((CTX)->VertexProgram._Current && \ ((CTX)->VertexProgram._Current != (CTX)->VertexProgram._TnlProgram) && \ ((CTX)->VertexProgram._Current->Base.InputsRead & VERT_BIT_COLOR1)) \ || ((CTX)->FragmentProgram._Current && \ ((CTX)->FragmentProgram._Current != (CTX)->FragmentProgram._TexEnvProgram) && \ ((CTX)->FragmentProgram._Current->Base.InputsRead & FRAG_BIT_COL1)) \ ) /** * Is RGBA LogicOp enabled? */ #define RGBA_LOGICOP_ENABLED(CTX) \ ((CTX)->Color.ColorLogicOpEnabled || \ ((CTX)->Color.BlendEnabled && (CTX)->Color.BlendEquationRGB == GL_LOGIC_OP)) #endif /* CONTEXT_H */