/* * Mesa 3-D graphics library * * 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 * THE AUTHORS OR COPYRIGHT HOLDERS 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: * - struct gl_context: this contains the Mesa rendering state * - struct gl_config: this describes the color buffer (RGB vs. ci), whether * or not there's a depth buffer, stencil buffer, etc. * - struct gl_framebuffer: 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, struct gl_context, struct gl_config, and struct gl_framebuffer * 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 "extensions.h" #include "mtypes.h" #include "vbo/vbo.h" #ifdef __cplusplus extern "C" { #endif struct _glapi_table; /** \name Visual-related functions */ /*@{*/ extern struct gl_config * _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( struct gl_config *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( struct gl_config *vis ); /*@}*/ /** \name Context-related functions */ /*@{*/ extern GLboolean _mesa_initialize_context( struct gl_context *ctx, gl_api api, const struct gl_config *visual, struct gl_context *share_list, const struct dd_function_table *driverFunctions); extern void _mesa_free_context_data( struct gl_context *ctx ); extern void _mesa_destroy_context( struct gl_context *ctx ); extern void _mesa_copy_context(const struct gl_context *src, struct gl_context *dst, GLuint mask); extern void _mesa_check_init_viewport(struct gl_context *ctx, GLuint width, GLuint height); extern GLboolean _mesa_make_current( struct gl_context *ctx, struct gl_framebuffer *drawBuffer, struct gl_framebuffer *readBuffer ); extern GLboolean _mesa_share_state(struct gl_context *ctx, struct gl_context *ctxToShare); extern struct gl_context * _mesa_get_current_context(void); /*@}*/ extern void _mesa_init_constants(struct gl_constants *consts, gl_api api); extern void _mesa_notifySwapBuffers(struct gl_context *gc); extern struct _glapi_table * _mesa_get_dispatch(struct gl_context *ctx); extern void _mesa_set_context_lost_dispatch(struct gl_context *ctx); extern GLboolean _mesa_valid_to_render(struct gl_context *ctx, const char *where); /** \name Miscellaneous */ /*@{*/ extern void _mesa_record_error( struct gl_context *ctx, GLenum error ); extern void _mesa_finish(struct gl_context *ctx); extern void _mesa_flush(struct gl_context *ctx); extern void GLAPIENTRY _mesa_Finish( void ); extern void GLAPIENTRY _mesa_Flush( void ); /*@}*/ /** * Are we currently between glBegin and glEnd? * During execution, not display list compilation. */ static inline GLboolean _mesa_inside_begin_end(const struct gl_context *ctx) { return ctx->Driver.CurrentExecPrimitive != PRIM_OUTSIDE_BEGIN_END; } /** * Are we currently between glBegin and glEnd in a display list? */ static inline GLboolean _mesa_inside_dlist_begin_end(const struct gl_context *ctx) { return ctx->Driver.CurrentSavePrimitive <= PRIM_MAX; } /** * \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 * __struct gl_contextRec::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) \ vbo_exec_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 * __struct gl_contextRec::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) \ vbo_exec_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 in case the assertion fails. */ #define ASSERT_OUTSIDE_BEGIN_END_WITH_RETVAL(ctx, retval) \ do { \ if (_mesa_inside_begin_end(ctx)) { \ _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 (_mesa_inside_begin_end(ctx)) { \ _mesa_error(ctx, GL_INVALID_OPERATION, "Inside glBegin/glEnd"); \ return; \ } \ } while (0) /*@}*/ /** * Checks if the context is for Desktop GL (Compatibility or Core) */ static inline bool _mesa_is_desktop_gl(const struct gl_context *ctx) { return ctx->API == API_OPENGL_COMPAT || ctx->API == API_OPENGL_CORE; } /** * Checks if the context is for any GLES version */ static inline bool _mesa_is_gles(const struct gl_context *ctx) { return ctx->API == API_OPENGLES || ctx->API == API_OPENGLES2; } /** * Checks if the context is for GLES 3.0 or later */ static inline bool _mesa_is_gles3(const struct gl_context *ctx) { return ctx->API == API_OPENGLES2 && ctx->Version >= 30; } /** * Checks if the context is for GLES 3.1 or later */ static inline bool _mesa_is_gles31(const struct gl_context *ctx) { return ctx->API == API_OPENGLES2 && ctx->Version >= 31; } /** * Checks if the context supports geometry shaders. */ static inline bool _mesa_has_geometry_shaders(const struct gl_context *ctx) { return _mesa_has_OES_geometry_shader(ctx) || (_mesa_is_desktop_gl(ctx) && ctx->Version >= 32); } /** * Checks if the context supports compute shaders. */ static inline bool _mesa_has_compute_shaders(const struct gl_context *ctx) { return _mesa_has_ARB_compute_shader(ctx) || (ctx->API == API_OPENGLES2 && ctx->Version >= 31); } /** * Checks if the context supports tessellation. */ static inline GLboolean _mesa_has_tessellation(const struct gl_context *ctx) { /* _mesa_has_EXT_tessellation_shader(ctx) is redundant with the OES * check, so don't bother calling it. */ return _mesa_has_OES_tessellation_shader(ctx) || _mesa_has_ARB_tessellation_shader(ctx); } static inline bool _mesa_has_texture_cube_map_array(const struct gl_context *ctx) { return _mesa_has_ARB_texture_cube_map_array(ctx) || _mesa_has_OES_texture_cube_map_array(ctx); } #ifdef __cplusplus } #endif #endif /* CONTEXT_H */