0,0 → 1,192 |
/* |
* 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 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 "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; |
struct vbo_save_context save; |
|
/* 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 |
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 |