| /* |
| * mesa 3-D graphics library |
| * Version: 6.5 |
| * |
| * 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 vbo_context.h |
| * \brief VBO builder module datatypes and definitions. |
| * \author Keith Whitwell |
| */ |
| |
| |
| /** |
| * \mainpage The VBO builder module |
| * |
| * This module hooks into the GL dispatch table and catches all vertex |
| * building and drawing commands, such as glVertex3f, glBegin and |
| * glDrawArrays. The module stores all incoming vertex data as arrays |
| * in GL vertex buffer objects (VBOs), and translates all drawing |
| * commands into calls to a driver supplied DrawPrimitives() callback. |
| * |
| * The module captures both immediate mode and display list drawing, |
| * and manages the allocation, reference counting and deallocation of |
| * vertex buffer objects itself. |
| * |
| * The DrawPrimitives() callback can be either implemented by the |
| * driver itself or hooked to the tnl module's _tnl_draw_primitives() |
| * function for hardware without tnl capablilties or during fallbacks. |
| */ |
| |
| |
| #ifndef _VBO_CONTEXT_H |
| #define _VBO_CONTEXT_H |
| |
| #include "main/mfeatures.h" |
| #include "vbo.h" |
| #include "vbo_attrib.h" |
| #include "vbo_exec.h" |
| #include "vbo_save.h" |
| |
| |
| /** Used to signal when transitioning from one kind of drawing method |
| * to another. |
| */ |
| enum draw_method |
| { |
| DRAW_NONE, /**< Initial value only */ |
| DRAW_BEGIN_END, |
| DRAW_DISPLAY_LIST, |
| DRAW_ARRAYS |
| }; |
| |
| |
| struct vbo_context { |
| struct gl_client_array currval[VBO_ATTRIB_MAX]; |
| |
| /** Map VERT_ATTRIB_x to VBO_ATTRIB_y */ |
| GLuint map_vp_none[VERT_ATTRIB_MAX]; |
| GLuint map_vp_arb[VERT_ATTRIB_MAX]; |
| |
| struct vbo_exec_context exec; |
| #if FEATURE_dlist |
| struct vbo_save_context save; |
| #endif |
| |
| /* Callback into the driver. This must always succeed, the driver |
| * is responsible for initiating any fallback actions required: |
| */ |
| vbo_draw_func draw_prims; |
| |
| enum draw_method last_draw_method; |
| }; |
| |
| |
| static inline struct vbo_context *vbo_context(struct gl_context *ctx) |
| { |
| return (struct vbo_context *)(ctx->swtnl_im); |
| } |
| |
| |
| /** |
| * Return VP_x token to indicate whether we're running fixed-function |
| * vertex transformation, an NV vertex program or ARB vertex program/shader. |
| */ |
| static inline enum vp_mode |
| get_program_mode( struct gl_context *ctx ) |
| { |
| if (!ctx->VertexProgram._Current) |
| return VP_NONE; |
| else if (ctx->VertexProgram._Current == ctx->VertexProgram._TnlProgram) |
| return VP_NONE; |
| else if (ctx->VertexProgram._Current->IsNVProgram) |
| return VP_NV; |
| else |
| return VP_ARB; |
| } |
| |
| |
| /** |
| * This is called by glBegin, glDrawArrays and glDrawElements (and |
| * variations of those calls). When we transition from immediate mode |
| * drawing to array drawing we need to invalidate the array state. |
| * |
| * glBegin/End builds vertex arrays. Those arrays may look identical |
| * to glDrawArrays arrays except that the position of the elements may |
| * be different. For example, arrays of (position3v, normal3f) vs. arrays |
| * of (normal3f, position3f). So we need to make sure we notify drivers |
| * that arrays may be changing. |
| */ |
| static inline void |
| vbo_draw_method(struct vbo_context *vbo, enum draw_method method) |
| { |
| if (vbo->last_draw_method != method) { |
| struct gl_context *ctx = vbo->exec.ctx; |
| |
| switch (method) { |
| case DRAW_ARRAYS: |
| ctx->Array._DrawArrays = vbo->exec.array.inputs; |
| break; |
| case DRAW_BEGIN_END: |
| ctx->Array._DrawArrays = vbo->exec.vtx.inputs; |
| break; |
| case DRAW_DISPLAY_LIST: |
| ctx->Array._DrawArrays = vbo->save.inputs; |
| break; |
| default: |
| ASSERT(0); |
| } |
| |
| ctx->NewDriverState |= ctx->DriverFlags.NewArray; |
| vbo->last_draw_method = method; |
| } |
| } |
| |
| /** |
| * Return if format is integer. The immediate mode commands only emit floats |
| * for non-integer types, thus everything else is integer. |
| */ |
| static inline GLboolean |
| vbo_attrtype_to_integer_flag(GLenum format) |
| { |
| switch (format) { |
| case GL_FLOAT: |
| return GL_FALSE; |
| case GL_INT: |
| case GL_UNSIGNED_INT: |
| return GL_TRUE; |
| default: |
| ASSERT(0); |
| return GL_FALSE; |
| } |
| } |
| |
| |
| /** |
| * Return default component values for the given format. |
| * The return type is an array of floats, because that's how we declare |
| * the vertex storage despite the fact we sometimes store integers in there. |
| */ |
| static inline const GLfloat * |
| vbo_get_default_vals_as_float(GLenum format) |
| { |
| static const GLfloat default_float[4] = { 0, 0, 0, 1 }; |
| static const GLint default_int[4] = { 0, 0, 0, 1 }; |
| |
| switch (format) { |
| case GL_FLOAT: |
| return default_float; |
| case GL_INT: |
| case GL_UNSIGNED_INT: |
| return (const GLfloat*)default_int; |
| default: |
| ASSERT(0); |
| return NULL; |
| } |
| } |
| |
| #endif |