mirror of
https://github.com/reactos/reactos.git
synced 2024-10-31 03:48:17 +00:00
5f2bebf7a5
With this commit, we now use a forked version of MESA which only supports OpenGL 1.1, like the windows implementation does. It exposes : - The same pixel formats - The same set of extensions - Nothing more All of this without taking 10% of your build time. If you need a more modern option, look at the MESA package from Rapps, which is (and must be) maintained outside of this code tree. CORE-7499
558 lines
18 KiB
C
558 lines
18 KiB
C
/* $Id: dd.h,v 1.15 1997/12/05 04:38:28 brianp Exp $ */
|
|
|
|
/*
|
|
* Mesa 3-D graphics library
|
|
* Version: 2.6
|
|
* Copyright (C) 1995-1997 Brian Paul
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the Free
|
|
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
|
|
/*
|
|
* $Log: dd.h,v $
|
|
* Revision 1.15 1997/12/05 04:38:28 brianp
|
|
* added ClearColorAndDepth() function pointer (David Bucciarelli)
|
|
*
|
|
* Revision 1.14 1997/11/25 03:39:41 brianp
|
|
* added TexSubImage() function pointer (David Bucciarelli)
|
|
*
|
|
* Revision 1.13 1997/10/29 02:23:54 brianp
|
|
* added UseGlobalTexturePalette() dd function (David Bucciarelli v20 3dfx)
|
|
*
|
|
* Revision 1.12 1997/10/16 02:27:53 brianp
|
|
* more comments
|
|
*
|
|
* Revision 1.11 1997/10/14 00:07:40 brianp
|
|
* added DavidB's fxmesa v19 changes
|
|
*
|
|
* Revision 1.10 1997/09/29 23:26:50 brianp
|
|
* new texture functions
|
|
*
|
|
* Revision 1.9 1997/04/29 01:31:07 brianp
|
|
* added RasterSetup() function to device driver
|
|
*
|
|
* Revision 1.8 1997/04/20 19:47:27 brianp
|
|
* added RenderVB to device driver
|
|
*
|
|
* Revision 1.7 1997/04/20 16:31:08 brianp
|
|
* added NearFar device driver function
|
|
*
|
|
* Revision 1.6 1997/04/12 12:27:31 brianp
|
|
* added QuadFunc and RectFunc
|
|
*
|
|
* Revision 1.5 1997/03/21 01:57:07 brianp
|
|
* added RendererString() function
|
|
*
|
|
* Revision 1.4 1997/02/10 19:22:47 brianp
|
|
* added device driver Error() function
|
|
*
|
|
* Revision 1.3 1997/01/16 03:34:33 brianp
|
|
* added preliminary texture mapping functions and cleaned up documentation
|
|
*
|
|
* Revision 1.2 1996/11/13 03:51:59 brianp
|
|
* updated comments
|
|
*
|
|
* Revision 1.1 1996/09/13 01:38:16 brianp
|
|
* Initial revision
|
|
*
|
|
*/
|
|
|
|
|
|
#ifndef DD_INCLUDED
|
|
#define DD_INCLUDED
|
|
|
|
|
|
/* THIS FILE ONLY INCLUDED BY types.h !!!!! */
|
|
|
|
|
|
/*
|
|
* Device Driver (DD) interface
|
|
*
|
|
*
|
|
* All device driver functions are accessed through pointers in the
|
|
* dd_function_table struct (defined below) which is stored in the GLcontext
|
|
* struct. Since the device driver is strictly accessed trough a table of
|
|
* function pointers we can:
|
|
* 1. switch between a number of different device drivers at runtime.
|
|
* 2. use optimized functions dependant on current rendering state or
|
|
* frame buffer configuration.
|
|
*
|
|
* The function pointers in the dd_function_table struct are divided into
|
|
* two groups: mandatory and optional.
|
|
* Mandatory functions have to be implemented by every device driver.
|
|
* Optional functions may or may not be implemented by the device driver.
|
|
* The optional functions provide ways to take advantage of special hardware
|
|
* or optimized algorithms.
|
|
*
|
|
* The function pointers in the dd_function_table struct are first
|
|
* initialized in the "MakeCurrent" function. The "MakeCurrent" function
|
|
* is a little different in each device driver. See the X/Mesa, GLX, or
|
|
* OS/Mesa drivers for examples.
|
|
*
|
|
* Later, Mesa may call the dd_function_table's UpdateState() function.
|
|
* This function should initialize the dd_function_table's pointers again.
|
|
* The UpdateState() function is called whenever the core (GL) rendering
|
|
* state is changed in a way which may effect rasterization. For example,
|
|
* the TriangleFunc() pointer may have to point to different functions
|
|
* depending on whether smooth or flat shading is enabled.
|
|
*
|
|
* Note that the first argument to every device driver function is a
|
|
* GLcontext *. In turn, the GLcontext->DriverCtx pointer points to
|
|
* the driver-specific context struct. See the X/Mesa or OS/Mesa interface
|
|
* for an example.
|
|
*
|
|
* For more information about writing a device driver see the ddsample.c
|
|
* file and other device drivers (xmesa[123].c, osmesa.c, etc) for examples.
|
|
*
|
|
*
|
|
* Look below in the dd_function_table struct definition for descriptions
|
|
* of each device driver function.
|
|
*
|
|
*
|
|
* In the future more function pointers may be added for glReadPixels
|
|
* glCopyPixels, etc.
|
|
*
|
|
*
|
|
* Notes:
|
|
* ------
|
|
* RGBA = red/green/blue/alpha
|
|
* CI = color index (color mapped mode)
|
|
* mono = all pixels have the same color or index
|
|
*
|
|
* The write_ functions all take an array of mask flags which indicate
|
|
* whether or not the pixel should be written. One special case exists
|
|
* in the write_color_span function: if the mask array is NULL, then
|
|
* draw all pixels. This is an optimization used for glDrawPixels().
|
|
*
|
|
* IN ALL CASES:
|
|
* X coordinates start at 0 at the left and increase to the right
|
|
* Y coordinates start at 0 at the bottom and increase upward
|
|
*
|
|
*/
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
* Device Driver function table.
|
|
*/
|
|
struct dd_function_table {
|
|
|
|
/**********************************************************************
|
|
*** Mandatory functions: these functions must be implemented by ***
|
|
*** every device driver. ***
|
|
**********************************************************************/
|
|
|
|
const char * (*RendererString)(void);
|
|
/*
|
|
* Return a string which uniquely identifies this device driver.
|
|
* The string should contain no whitespace. Examples: "X11" "OffScreen"
|
|
* "MSWindows" "SVGA".
|
|
*/
|
|
|
|
void (*UpdateState)( GLcontext *ctx );
|
|
/*
|
|
* UpdateState() is called whenver Mesa thinks the device driver should
|
|
* update its state and/or the other pointers (such as PointsFunc,
|
|
* LineFunc, or TriangleFunc).
|
|
*/
|
|
|
|
void (*ClearIndex)( GLcontext *ctx, GLuint index );
|
|
/*
|
|
* Called whenever glClearIndex() is called. Set the index for clearing
|
|
* the color buffer.
|
|
*/
|
|
|
|
void (*ClearColor)( GLcontext *ctx, GLubyte red, GLubyte green,
|
|
GLubyte blue, GLubyte alpha );
|
|
/*
|
|
* Called whenever glClearColor() is called. Set the color for clearing
|
|
* the color buffer.
|
|
*/
|
|
|
|
void (*Clear)( GLcontext *ctx,
|
|
GLboolean all, GLint x, GLint y, GLint width, GLint height );
|
|
/*
|
|
* Clear the current color buffer. If 'all' is set the clear the whole
|
|
* buffer, else clear the region defined by (x,y,width,height).
|
|
*/
|
|
|
|
void (*Index)( GLcontext *ctx, GLuint index );
|
|
/*
|
|
* Sets current color index for drawing flat-shaded primitives.
|
|
*/
|
|
|
|
void (*Color)( GLcontext *ctx,
|
|
GLubyte red, GLubyte green, GLubyte glue, GLubyte alpha );
|
|
/*
|
|
* Sets current color for drawing flat-shaded primitives.
|
|
*/
|
|
|
|
GLboolean (*SetBuffer)( GLcontext *ctx, GLenum mode );
|
|
/*
|
|
* Selects either the front or back color buffer for reading and writing.
|
|
* mode is either GL_FRONT or GL_BACK.
|
|
*/
|
|
|
|
void (*GetBufferSize)( GLcontext *ctx,
|
|
GLuint *width, GLuint *height );
|
|
/*
|
|
* Returns the width and height of the current color buffer.
|
|
*/
|
|
|
|
|
|
/***
|
|
*** Functions for writing pixels to the frame buffer:
|
|
***/
|
|
void (*WriteColorSpan)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y,
|
|
const GLubyte red[], const GLubyte green[],
|
|
const GLubyte blue[], const GLubyte alpha[],
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Write a horizontal run of RGBA pixels.
|
|
*/
|
|
|
|
void (*WriteMonocolorSpan)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y,
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Write a horizontal run of mono-RGBA pixels.
|
|
*/
|
|
|
|
void (*WriteColorPixels)( GLcontext *ctx,
|
|
GLuint n, const GLint x[], const GLint y[],
|
|
const GLubyte red[], const GLubyte green[],
|
|
const GLubyte blue[], const GLubyte alpha[],
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Write an array of RGBA pixels at random locations.
|
|
*/
|
|
|
|
void (*WriteMonocolorPixels)( GLcontext *ctx,
|
|
GLuint n, const GLint x[], const GLint y[],
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Write an array of mono-RGBA pixels at random locations.
|
|
*/
|
|
|
|
void (*WriteIndexSpan)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y, const GLuint index[],
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Write a horizontal run of CI pixels.
|
|
*/
|
|
|
|
void (*WriteMonoindexSpan)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y,
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Write a horizontal run of mono-CI pixels.
|
|
*/
|
|
|
|
void (*WriteIndexPixels)( GLcontext *ctx,
|
|
GLuint n, const GLint x[], const GLint y[],
|
|
const GLuint index[], const GLubyte mask[] );
|
|
/*
|
|
* Write a random array of CI pixels.
|
|
*/
|
|
|
|
void (*WriteMonoindexPixels)( GLcontext *ctx,
|
|
GLuint n, const GLint x[], const GLint y[],
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Write a random array of mono-CI pixels.
|
|
*/
|
|
|
|
/***
|
|
*** Functions to read pixels from frame buffer:
|
|
***/
|
|
void (*ReadIndexSpan)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y, GLuint index[] );
|
|
/*
|
|
* Read a horizontal run of color index pixels.
|
|
*/
|
|
|
|
void (*ReadColorSpan)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y,
|
|
GLubyte red[], GLubyte green[],
|
|
GLubyte blue[], GLubyte alpha[] );
|
|
/*
|
|
* Read a horizontal run of RGBA pixels.
|
|
*/
|
|
|
|
void (*ReadIndexPixels)( GLcontext *ctx,
|
|
GLuint n, const GLint x[], const GLint y[],
|
|
GLuint indx[], const GLubyte mask[] );
|
|
/*
|
|
* Read a random array of CI pixels.
|
|
*/
|
|
|
|
void (*ReadColorPixels)( GLcontext *ctx,
|
|
GLuint n, const GLint x[], const GLint y[],
|
|
GLubyte red[], GLubyte green[],
|
|
GLubyte blue[], GLubyte alpha[],
|
|
const GLubyte mask[] );
|
|
/*
|
|
* Read a random array of RGBA pixels.
|
|
*/
|
|
|
|
|
|
/**********************************************************************
|
|
*** Optional functions: these functions may or may not be ***
|
|
*** implemented by the device driver. If the device driver ***
|
|
*** doesn't implement them it should never touch these pointers ***
|
|
*** since Mesa will either set them to NULL or point them at a ***
|
|
*** fall-back function. ***
|
|
**********************************************************************/
|
|
|
|
void (*Finish)( GLcontext *ctx );
|
|
/*
|
|
* Called whenever glFinish() is called.
|
|
*/
|
|
|
|
void (*Flush)( GLcontext *ctx );
|
|
/*
|
|
* Called whenever glFlush() is called.
|
|
*/
|
|
|
|
GLboolean (*IndexMask)( GLcontext *ctx, GLuint mask );
|
|
/*
|
|
* Implements glIndexMask() if possible, else return GL_FALSE.
|
|
*/
|
|
|
|
GLboolean (*ColorMask)( GLcontext *ctx,
|
|
GLboolean rmask, GLboolean gmask,
|
|
GLboolean bmask, GLboolean amask );
|
|
/*
|
|
* Implements glColorMask() if possible, else return GL_FALSE.
|
|
*/
|
|
|
|
GLboolean (*LogicOp)( GLcontext *ctx, GLenum op );
|
|
/*
|
|
* Implements glLogicOp() if possible, else return GL_FALSE.
|
|
*/
|
|
|
|
void (*Dither)( GLcontext *ctx, GLboolean enable );
|
|
/*
|
|
* Enable/disable dithering.
|
|
*/
|
|
|
|
void (*Error)( GLcontext *ctx );
|
|
/*
|
|
* Called whenever an error is generated. ctx->ErrorValue contains
|
|
* the error value.
|
|
*/
|
|
|
|
void (*NearFar)( GLcontext *ctx, GLfloat nearVal, GLfloat farVal );
|
|
/*
|
|
* Called from glFrustum and glOrtho to tell device driver the
|
|
* near and far clipping plane Z values. The 3Dfx driver, for example,
|
|
* uses this.
|
|
*/
|
|
|
|
|
|
/***
|
|
*** For supporting hardware Z buffers:
|
|
***/
|
|
|
|
void (*AllocDepthBuffer)( GLcontext *ctx );
|
|
/*
|
|
* Called when the depth buffer must be allocated or possibly resized.
|
|
*/
|
|
|
|
void (*ClearDepthBuffer)( GLcontext *ctx );
|
|
/*
|
|
* Clear the depth buffer to depth specified by CC.Depth.Clear value.
|
|
*/
|
|
|
|
GLuint (*DepthTestSpan)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y, const GLdepth z[],
|
|
GLubyte mask[] );
|
|
void (*DepthTestPixels)( GLcontext *ctx,
|
|
GLuint n, const GLint x[], const GLint y[],
|
|
const GLdepth z[], GLubyte mask[] );
|
|
/*
|
|
* Apply the depth buffer test to an span/array of pixels and return
|
|
* an updated pixel mask. This function is not used when accelerated
|
|
* point, line, polygon functions are used.
|
|
*/
|
|
|
|
void (*ReadDepthSpanFloat)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y, GLfloat depth[]);
|
|
void (*ReadDepthSpanInt)( GLcontext *ctx,
|
|
GLuint n, GLint x, GLint y, GLdepth depth[] );
|
|
/*
|
|
* Return depth values as integers for glReadPixels.
|
|
* Floats should be returned in the range [0,1].
|
|
* Ints (GLdepth) values should be in the range [0,MAXDEPTH].
|
|
*/
|
|
|
|
|
|
void (*ClearColorAndDepth)( GLcontext *ctx,
|
|
GLboolean all, GLint x, GLint y,
|
|
GLint width, GLint height );
|
|
/*
|
|
* If this function is implemented then it will be called when both the
|
|
* color and depth buffers are to be cleared.
|
|
*/
|
|
|
|
|
|
/***
|
|
*** Accelerated point, line, polygon, glDrawPixels and glBitmap functions:
|
|
***/
|
|
|
|
points_func PointsFunc;
|
|
/*
|
|
* Called to draw an array of points.
|
|
*/
|
|
|
|
line_func LineFunc;
|
|
/*
|
|
* Called to draw a line segment.
|
|
*/
|
|
|
|
triangle_func TriangleFunc;
|
|
/*
|
|
* Called to draw a filled triangle.
|
|
*/
|
|
|
|
quad_func QuadFunc;
|
|
/*
|
|
* Called to draw a filled quadrilateral.
|
|
*/
|
|
|
|
rect_func RectFunc;
|
|
/*
|
|
* Called to draw a filled, screen-aligned 2-D rectangle.
|
|
*/
|
|
|
|
GLboolean (*DrawPixels)( GLcontext *ctx,
|
|
GLint x, GLint y, GLsizei width, GLsizei height,
|
|
GLenum format, GLenum type, GLboolean packed,
|
|
const GLvoid *pixels );
|
|
/*
|
|
* Called from glDrawPixels().
|
|
*/
|
|
|
|
GLboolean (*Bitmap)( GLcontext *ctx, GLsizei width, GLsizei height,
|
|
GLfloat xorig, GLfloat yorig,
|
|
GLfloat xmove, GLfloat ymove,
|
|
const struct gl_image *bitmap );
|
|
/*
|
|
* Called from glBitmap().
|
|
*/
|
|
|
|
void (*Begin)( GLcontext *ctx, GLenum mode );
|
|
void (*End)( GLcontext *ctx );
|
|
/*
|
|
* These are called whenever glBegin() or glEnd() are called.
|
|
* The device driver may do some sort of window locking/unlocking here.
|
|
*/
|
|
|
|
|
|
void (*RasterSetup)( GLcontext *ctx, GLuint start, GLuint end );
|
|
/*
|
|
* This function, if not NULL, is called whenever new window coordinates
|
|
* are put in the vertex buffer. The vertices in question are those n
|
|
* such that start <= n < end.
|
|
* The device driver can convert the window coords to its own specialized
|
|
* format. The 3Dfx driver uses this.
|
|
*/
|
|
|
|
GLboolean (*RenderVB)( GLcontext *ctx, GLboolean allDone );
|
|
/*
|
|
* This function allows the device driver to rasterize an entire
|
|
* buffer of primitives at once. See the gl_render_vb() function
|
|
* in vbrender.c for more details.
|
|
* Return GL_TRUE if vertex buffer successfully rendered.
|
|
* Return GL_FALSE if failure, let core Mesa render the vertex buffer.
|
|
*/
|
|
|
|
/***
|
|
*** Texture mapping functions:
|
|
***/
|
|
|
|
void (*TexEnv)( GLcontext *ctx, GLenum pname, const GLfloat *param );
|
|
/*
|
|
* Called whenever glTexEnv*() is called.
|
|
* Pname will be one of GL_TEXTURE_ENV_MODE or GL_TEXTURE_ENV_COLOR.
|
|
* If pname is GL_TEXTURE_ENV_MODE then param will be one
|
|
* of GL_MODULATE, GL_BLEND, GL_DECAL, or GL_REPLACE.
|
|
*/
|
|
|
|
void (*TexImage)( GLcontext *ctx, GLenum target,
|
|
struct gl_texture_object *tObj, GLint level,
|
|
GLint internalFormat,
|
|
const struct gl_texture_image *image );
|
|
/*
|
|
* Called whenever a texture object's image is changed.
|
|
* texObject is the number of the texture object being changed.
|
|
* level indicates the mipmap level.
|
|
* internalFormat is the format in which the texture is to be stored.
|
|
* image is a pointer to a gl_texture_image struct which contains
|
|
* the actual image data.
|
|
*/
|
|
|
|
void (*TexSubImage)( GLcontext *ctx, GLenum target,
|
|
struct gl_texture_object *tObj, GLint level,
|
|
GLint xoffset, GLint yoffset,
|
|
GLsizei width, GLsizei height,
|
|
GLint internalFormat,
|
|
const struct gl_texture_image *image );
|
|
/*
|
|
* Called from glTexSubImage() to define a sub-region of a texture.
|
|
*/
|
|
|
|
void (*TexParameter)( GLcontext *ctx, GLenum target,
|
|
struct gl_texture_object *tObj,
|
|
GLenum pname, const GLfloat *params );
|
|
/*
|
|
* Called whenever glTexParameter*() is called.
|
|
* target is GL_TEXTURE_1D or GL_TEXTURE_2D
|
|
* texObject is the texture object to modify
|
|
* pname is one of GL_TEXTURE_MIN_FILTER, GL_TEXTURE_MAG_FILTER,
|
|
* GL_TEXTURE_WRAP_S, GL_TEXTURE_WRAP_T, or GL_TEXTURE_BORDER_COLOR.
|
|
* params is dependant on pname. See man glTexParameter.
|
|
*/
|
|
|
|
void (*BindTexture)( GLcontext *ctx, GLenum target,
|
|
struct gl_texture_object *tObj );
|
|
/*
|
|
* Called whenever glBindTexture() is called. This specifies which
|
|
* texture is to be the current one.
|
|
*/
|
|
|
|
void (*DeleteTexture)( GLcontext *ctx, struct gl_texture_object *tObj );
|
|
/*
|
|
* Called when a texture object can be deallocated.
|
|
*/
|
|
|
|
void (*UpdateTexturePalette)( GLcontext *ctx,
|
|
struct gl_texture_object *tObj );
|
|
/*
|
|
* Called when the texture's color lookup table is changed.
|
|
* If tObj is NULL then the shared texture palette ctx->Texture.Palette
|
|
* was changed.
|
|
*/
|
|
};
|
|
|
|
|
|
|
|
#endif
|
|
|