mirror of https://github.com/tongzx/nt5src
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
282 lines
6.8 KiB
282 lines
6.8 KiB
/*
|
|
** Copyright 1991,1992, Silicon Graphics, Inc.
|
|
** All Rights Reserved.
|
|
**
|
|
** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
|
|
** the contents of this file may not be disclosed to third parties, copied or
|
|
** duplicated in any form, in whole or in part, without the prior written
|
|
** permission of Silicon Graphics, Inc.
|
|
**
|
|
** RESTRICTED RIGHTS LEGEND:
|
|
** Use, duplication or disclosure by the Government is subject to restrictions
|
|
** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
|
|
** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
|
|
** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
|
|
** rights reserved under the Copyright Laws of the United States.
|
|
*/
|
|
|
|
#include "precomp.h"
|
|
#pragma hdrstop
|
|
|
|
/*
|
|
** This file contains span reading routines. These are routines which
|
|
** read data from the depth buffer, stencil buffer, or frame buffer
|
|
** into internal software spans. The type of internal span that it
|
|
** is read into varies from routine to routine.
|
|
*/
|
|
|
|
/*
|
|
** A reader that reads spans into scaled a RGBA, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than 1.0 and greater than -1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadRGBA(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLint readY, readX;
|
|
GLshort *pixelArray;
|
|
GLint skipCount;
|
|
|
|
width = spanInfo->realWidth;
|
|
spanData = (GLfloat*) span;
|
|
pixelArray = spanInfo->pixelArray;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
|
|
for (i=0; i<width; i++) {
|
|
#ifdef NT
|
|
(*gc->readBuffer->readColor)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData);
|
|
#else
|
|
(*gc->frontBuffer.readColor)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData);
|
|
#endif
|
|
|
|
spanData += 4;
|
|
skipCount = *pixelArray++;
|
|
readX += skipCount;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** A reader that reads spans into a scaled RGBA, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than or equal to -1.0 or greater than or
|
|
** equal to 1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadRGBA2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLint readY, readX;
|
|
|
|
width = spanInfo->width;
|
|
spanData = (GLfloat*) span;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
|
|
#ifdef NT
|
|
(*gc->readBuffer->readSpan)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData, width);
|
|
#else
|
|
(*gc->frontBuffer.readSpan)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData, width);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
** A reader that reads spans into a COLOR_INDEX, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than 1.0 and greater than -1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadCI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLenum format;
|
|
GLint readY, readX;
|
|
GLshort *pixelArray;
|
|
GLint skipCount;
|
|
|
|
width = spanInfo->realWidth;
|
|
spanData = (GLfloat*) span;
|
|
pixelArray = spanInfo->pixelArray;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
|
|
for (i=0; i<width; i++) {
|
|
#ifdef NT
|
|
(*gc->readBuffer->readColor)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData);
|
|
#else
|
|
(*gc->frontBuffer.readColor)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData);
|
|
#endif
|
|
spanData++;
|
|
skipCount = *pixelArray++;
|
|
readX += skipCount;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** A reader that reads spans into a COLOR_INDEX, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than or equal to -1.0 or greater than or
|
|
** equal to 1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadCI2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLint readY, readX;
|
|
|
|
width = spanInfo->width;
|
|
spanData = (GLfloat*) span;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
|
|
for (i=0; i<width; i++) {
|
|
#ifdef NT
|
|
(*gc->readBuffer->readColor)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData);
|
|
#else
|
|
(*gc->frontBuffer.readColor)(gc->readBuffer, readX, readY,
|
|
(__GLcolor *) spanData);
|
|
#endif
|
|
spanData++;
|
|
readX++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** A reader that reads spans into a DEPTH_COMPONENT, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than 1.0 and greater than -1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadDepth(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLint readY, readX;
|
|
GLshort *pixelArray;
|
|
GLint skipCount;
|
|
__GLfloat oneOverScale;
|
|
|
|
width = spanInfo->realWidth;
|
|
spanData = (GLfloat*) span;
|
|
pixelArray = spanInfo->pixelArray;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
oneOverScale = __glOne / gc->depthBuffer.scale;
|
|
|
|
for (i=0; i<width; i++) {
|
|
*spanData++ =
|
|
(*gc->depthBuffer.fetch)(&(gc->depthBuffer), readX, readY) *
|
|
oneOverScale;
|
|
skipCount = *pixelArray++;
|
|
readX += skipCount;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** A reader that reads spans into a DEPTH_COMPONENT, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than or equal to -1.0 or greater than or
|
|
** equal to 1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadDepth2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLint readY, readX;
|
|
__GLfloat oneOverScale;
|
|
|
|
width = spanInfo->width;
|
|
spanData = (GLfloat*) span;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
oneOverScale = __glOne / gc->depthBuffer.scale;
|
|
|
|
for (i=0; i<width; i++) {
|
|
*spanData++ =
|
|
(*gc->depthBuffer.fetch)(&(gc->depthBuffer), readX, readY) *
|
|
oneOverScale;
|
|
readX++;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** A reader that reads spans into a STENCIL_INDEX, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than 1.0 and greater than -1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadStencil(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLint readY, readX;
|
|
GLshort *pixelArray;
|
|
GLint skipCount;
|
|
|
|
width = spanInfo->realWidth;
|
|
spanData = (GLfloat*) span;
|
|
pixelArray = spanInfo->pixelArray;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
|
|
for (i=0; i<width; i++) {
|
|
*spanData++ =
|
|
(*gc->stencilBuffer.fetch)(&(gc->stencilBuffer), readX, readY);
|
|
skipCount = *pixelArray++;
|
|
readX += skipCount;
|
|
}
|
|
}
|
|
|
|
/*
|
|
** A reader that reads spans into a STENCIL_INDEX, FLOAT span.
|
|
**
|
|
** zoomx is assumed to be less than or equal to -1.0 or greater than or
|
|
** equal to 1.0.
|
|
*/
|
|
void FASTCALL __glSpanReadStencil2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *span)
|
|
{
|
|
GLint i;
|
|
GLint width;
|
|
GLfloat *spanData;
|
|
GLint readY, readX;
|
|
|
|
width = spanInfo->width;
|
|
spanData = (GLfloat*) span;
|
|
|
|
readY = spanInfo->readY;
|
|
readX = spanInfo->readX;
|
|
|
|
for (i=0; i<width; i++) {
|
|
*spanData++ =
|
|
(*gc->stencilBuffer.fetch)(&(gc->stencilBuffer), readX, readY);
|
|
readX++;
|
|
}
|
|
}
|