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755 lines
19 KiB
755 lines
19 KiB
/*
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** Copyright 1991,1992, Silicon Graphics, Inc.
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** All Rights Reserved.
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**
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** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;
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** the contents of this file may not be disclosed to third parties, copied or
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** duplicated in any form, in whole or in part, without the prior written
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** permission of Silicon Graphics, Inc.
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**
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** RESTRICTED RIGHTS LEGEND:
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** Use, duplication or disclosure by the Government is subject to restrictions
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** as set forth in subdivision (c)(1)(ii) of the Rights in Technical Data
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** and Computer Software clause at DFARS 252.227-7013, and/or in similar or
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** successor clauses in the FAR, DOD or NASA FAR Supplement. Unpublished -
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** rights reserved under the Copyright Laws of the United States.
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*/
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#include "precomp.h"
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#pragma hdrstop
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#include "imports.h"
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/*
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** This file contains span packers. A span packer takes a span of source
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** data, and packs its contents into the user's data space.
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**
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** The packer is expected to aquire information about store modes from
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** the __GLpixelSpanInfo structure.
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*/
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void FASTCALL __glInitPacker(__GLcontext *gc, __GLpixelSpanInfo *spanInfo)
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{
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GLint alignment;
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GLint lsb_first;
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GLint components;
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GLint element_size;
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GLint rowsize;
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GLint padding;
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GLint group_size;
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GLint groups_per_line;
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GLint skip_pixels, skip_lines;
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GLint swap_bytes;
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GLenum format, type;
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const GLvoid *pixels;
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format = spanInfo->dstFormat;
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type = spanInfo->dstType;
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pixels = spanInfo->dstImage;
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skip_pixels = spanInfo->dstSkipPixels;
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skip_lines = spanInfo->dstSkipLines;
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alignment = spanInfo->dstAlignment;
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lsb_first = spanInfo->dstLsbFirst;
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swap_bytes = spanInfo->dstSwapBytes;
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components = __glElementsPerGroup(format);
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groups_per_line = spanInfo->dstLineLength;
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element_size = __glBytesPerElement(type);
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if (element_size == 1) swap_bytes = 0;
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group_size = element_size * components;
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rowsize = groups_per_line * group_size;
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if (type == GL_BITMAP) {
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rowsize = (groups_per_line + 7)/8;
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}
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padding = (rowsize % alignment);
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if (padding) {
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rowsize += alignment - padding;
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}
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if (((skip_pixels & 0x7) && type == GL_BITMAP) ||
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(swap_bytes && element_size > 1)) {
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spanInfo->dstPackedData = GL_FALSE;
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} else {
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spanInfo->dstPackedData = GL_TRUE;
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}
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if (type == GL_BITMAP) {
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spanInfo->dstCurrent = (GLvoid *) (((const GLubyte*) pixels) +
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skip_lines * rowsize + skip_pixels / 8);
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spanInfo->dstStartBit = skip_pixels % 8;
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} else {
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spanInfo->dstCurrent = (GLvoid *) (((const GLubyte*) pixels) +
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skip_lines * rowsize + skip_pixels * group_size);
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}
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spanInfo->dstRowIncrement = rowsize;
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spanInfo->dstGroupIncrement = group_size;
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spanInfo->dstComponents = components;
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spanInfo->dstElementSize = element_size;
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}
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/*
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** Reduces and unscales a RGBA, FLOAT span into a RED, FLOAT span, unscaling
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** as it goes.
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*/
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void __glSpanReduceRed(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat rs = gc->frontBuffer.oneOverRedScale;
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for (i=0; i<width; i++) {
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*outData++ = *inData * rs;
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inData += 4;
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}
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}
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/*
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** Reduces and unscales a RGBA, FLOAT span into a GREEN, FLOAT span, unscaling
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** as it goes.
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*/
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void __glSpanReduceGreen(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat gs = gc->frontBuffer.oneOverGreenScale;
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inData++; /* Skip first red */
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for (i=0; i<width; i++) {
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*outData++ = *inData * gs;
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inData += 4;
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}
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}
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/*
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** Reduces and unscales a RGBA, FLOAT span into a BLUE, FLOAT span, unscaling
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** as it goes.
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*/
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void __glSpanReduceBlue(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat bs = gc->frontBuffer.oneOverBlueScale;
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inData += 2; /* Skip first red, green */
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for (i=0; i<width; i++) {
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*outData++ = *inData * bs;
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inData += 4;
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}
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}
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/*
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** Reduces and unscales a RGBA, FLOAT span into a ALPHA, FLOAT span, unscaling
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** as it goes.
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*/
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void __glSpanReduceAlpha(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat as = gc->frontBuffer.oneOverAlphaScale;
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inData += 3; /* Skip first red, green, blue */
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for (i=0; i<width; i++) {
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*outData++ = *inData * as;
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inData += 4;
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}
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}
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/*
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** Reduces and unscales a RGBA, FLOAT span into a RGB, FLOAT span, unscaling
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** as it goes.
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*/
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void __glSpanReduceRGB(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat rs = gc->frontBuffer.oneOverRedScale;
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GLfloat bs = gc->frontBuffer.oneOverBlueScale;
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GLfloat gs = gc->frontBuffer.oneOverGreenScale;
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GLfloat red, green, blue;
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for (i=0; i<width; i++) {
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red = *inData++ * rs;
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green = *inData++ * gs;
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blue = *inData++ * bs;
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*outData++ = red;
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*outData++ = green;
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*outData++ = blue;
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inData++;
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}
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}
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#ifdef GL_EXT_bgra
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/*
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** Reduces and unscales a RGBA, FLOAT span into a BGR, FLOAT span, unscaling
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** as it goes.
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*/
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void __glSpanReduceBGR(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat rs = gc->frontBuffer.oneOverRedScale;
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GLfloat bs = gc->frontBuffer.oneOverBlueScale;
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GLfloat gs = gc->frontBuffer.oneOverGreenScale;
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GLfloat red, green, blue;
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for (i=0; i<width; i++) {
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red = *inData++ * rs;
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green = *inData++ * gs;
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blue = *inData++ * bs;
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*outData++ = blue;
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*outData++ = green;
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*outData++ = red;
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inData++;
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}
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}
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#endif
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/*
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** Reduces and unscales a RGBA, FLOAT span into a LUMINANCE, FLOAT span,
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** unscaling as it goes.
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*/
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void __glSpanReduceLuminance(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat l, one;
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GLfloat rs = gc->frontBuffer.oneOverRedScale;
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GLfloat bs = gc->frontBuffer.oneOverBlueScale;
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GLfloat gs = gc->frontBuffer.oneOverGreenScale;
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one = __glOne;
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for (i=0; i<width; i++) {
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l = inData[0] * rs + inData[1] * gs + inData[2] * bs;
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if (l > one) l = one;
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*outData++ = l;
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inData += 4;
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}
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}
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/*
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** Reduces and unscales a RGBA, FLOAT span into a LUMINANCE_ALPHA, FLOAT span,
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** unscaling as it goes.
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*/
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void __glSpanReduceLuminanceAlpha(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat l, one;
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GLfloat rs = gc->frontBuffer.oneOverRedScale;
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GLfloat bs = gc->frontBuffer.oneOverBlueScale;
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GLfloat gs = gc->frontBuffer.oneOverGreenScale;
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GLfloat as = gc->frontBuffer.oneOverAlphaScale;
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one = __glOne;
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for (i=0; i<width; i++) {
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l = inData[0] * rs + inData[1] * gs + inData[2] * bs;
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if (l > one) l = one;
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*outData++ = l;
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inData += 3;
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*outData++ = *inData++ * as;
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}
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}
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/*
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** Reduces and unscales a RGBA, FLOAT span into a __GL_RED_ALPHA, FLOAT span,
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** unscaling as it goes.
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*/
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void __glSpanReduceRedAlpha(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *outData = (GLfloat *) outspan;
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GLfloat *inData = (GLfloat *) inspan;
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GLfloat r, one;
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GLfloat rs = gc->frontBuffer.oneOverRedScale;
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GLfloat as = gc->frontBuffer.oneOverAlphaScale;
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one = __glOne;
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for (i=0; i<width; i++) {
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*outData++ = *inData++ * rs;
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inData += 2;
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*outData++ = *inData++ * as;
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}
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}
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/*
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** Packs to any component of type UNSIGNED_BYTE from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackUbyte(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLubyte *outData = (GLubyte *) outspan;
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GLint components = spanInfo->dstComponents;
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GLint totalSize = width * components;
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FPU_SAVE_MODE();
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FPU_CHOP_ON_PREC_LOW();
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = (GLubyte) UNSAFE_FTOL((*inData++) * __glVal255 + __glHalf);
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}
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FPU_RESTORE_MODE();
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}
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/*
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** Packs to any component of type BYTE from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackByte(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLbyte *outData = (GLbyte *) outspan;
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GLint components = spanInfo->dstComponents;
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GLint totalSize = width * components;
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = __GL_FLOAT_TO_B(*inData++);
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}
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}
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/*
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** Packs to any component of type UNSIGNED_SHORT from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackUshort(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLushort *outData = (GLushort *) outspan;
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GLint components = spanInfo->dstComponents;
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GLint totalSize = width * components;
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FPU_SAVE_MODE();
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FPU_CHOP_ON_PREC_LOW();
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = (GLushort) UNSAFE_FTOL((*inData++) * __glVal65535 + __glHalf);
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}
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FPU_RESTORE_MODE();
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}
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/*
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** Packs to any component of type SHORT from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackShort(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLshort *outData = (GLshort *) outspan;
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GLint components = spanInfo->dstComponents;
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GLint totalSize = width * components;
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = __GL_FLOAT_TO_S(*inData++);
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}
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}
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/*
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** Packs to any component of type UNSIGNED_INT from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackUint(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLuint *outData = (GLuint *) outspan;
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GLint components = spanInfo->dstComponents;
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GLint totalSize = width * components;
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = __GL_FLOAT_TO_UI(*inData++);
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}
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}
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/*
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** Packs to any component of type INT from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackInt(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint width = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLint *outData = (GLint *) outspan;
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GLint components = spanInfo->dstComponents;
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GLint totalSize = width * components;
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = __GL_FLOAT_TO_I(*inData++);
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}
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}
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/*
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** Packs to any index of type UNSIGNED_BYTE from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackUbyteI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint totalSize = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLubyte *outData = (GLubyte *) outspan;
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FPU_SAVE_MODE();
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FPU_CHOP_ON_PREC_LOW();
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = (GLubyte) UNSAFE_FTOL(*inData++);
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}
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FPU_RESTORE_MODE();
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}
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/*
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** Packs to any index of type BYTE from a span of the same
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** format of type FLOAT.
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*/
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void __glSpanPackByteI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint totalSize = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLbyte *outData = (GLbyte *) outspan;
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FPU_SAVE_MODE();
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FPU_CHOP_ON_PREC_LOW();
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#ifdef __GL_LINT
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gc = gc;
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#endif
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for (i=0; i<totalSize; i++) {
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*outData++ = UNSAFE_FTOL(*inData++) & 0x7f;
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}
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FPU_RESTORE_MODE();
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}
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/*
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** Packs to any index of type UNSIGNED_SHORT from a span of the same
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** format of type FLOAT.
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*/
|
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void __glSpanPackUshortI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
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GLvoid *inspan, GLvoid *outspan)
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{
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GLint i;
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GLint totalSize = spanInfo->realWidth;
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GLfloat *inData = (GLfloat *) inspan;
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GLushort *outData = (GLushort *) outspan;
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|
|
FPU_SAVE_MODE();
|
|
FPU_CHOP_ON_PREC_LOW();
|
|
|
|
#ifdef __GL_LINT
|
|
gc = gc;
|
|
#endif
|
|
for (i=0; i<totalSize; i++) {
|
|
*outData++ = (GLushort) UNSAFE_FTOL(*inData++);
|
|
}
|
|
|
|
FPU_RESTORE_MODE();
|
|
}
|
|
|
|
/*
|
|
** Packs to any index of type SHORT from a span of the same
|
|
** format of type FLOAT.
|
|
*/
|
|
void __glSpanPackShortI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *inspan, GLvoid *outspan)
|
|
{
|
|
GLint i;
|
|
GLint totalSize = spanInfo->realWidth;
|
|
GLfloat *inData = (GLfloat *) inspan;
|
|
GLshort *outData = (GLshort *) outspan;
|
|
|
|
FPU_SAVE_MODE();
|
|
FPU_CHOP_ON_PREC_LOW();
|
|
|
|
#ifdef __GL_LINT
|
|
gc = gc;
|
|
#endif
|
|
for (i=0; i<totalSize; i++) {
|
|
*outData++ = UNSAFE_FTOL(*inData++) & 0x7fff;
|
|
}
|
|
|
|
FPU_RESTORE_MODE();
|
|
}
|
|
|
|
/*
|
|
** Packs to any index of type UNSIGNED_INT from a span of the same
|
|
** format of type FLOAT.
|
|
*/
|
|
void __glSpanPackUintI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *inspan, GLvoid *outspan)
|
|
{
|
|
GLint i;
|
|
GLint totalSize = spanInfo->realWidth;
|
|
GLfloat *inData = (GLfloat *) inspan;
|
|
GLuint *outData = (GLuint *) outspan;
|
|
|
|
FPU_SAVE_MODE();
|
|
FPU_CHOP_ON_PREC_LOW();
|
|
|
|
#ifdef __GL_LINT
|
|
gc = gc;
|
|
#endif
|
|
for (i=0; i<totalSize; i++) {
|
|
*outData++ = FTOL(*inData++);
|
|
}
|
|
|
|
FPU_RESTORE_MODE();
|
|
}
|
|
|
|
/*
|
|
** Packs to any index of type INT from a span of the same
|
|
** format of type FLOAT.
|
|
*/
|
|
void __glSpanPackIntI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *inspan, GLvoid *outspan)
|
|
{
|
|
GLint i;
|
|
GLint totalSize = spanInfo->realWidth;
|
|
GLfloat *inData = (GLfloat *) inspan;
|
|
GLint *outData = (GLint *) outspan;
|
|
|
|
FPU_SAVE_MODE();
|
|
FPU_CHOP_ON_PREC_LOW();
|
|
|
|
#ifdef __GL_LINT
|
|
gc = gc;
|
|
#endif
|
|
for (i=0; i<totalSize; i++) {
|
|
*outData++ = FTOL(*inData++) & 0x7fffffff;
|
|
}
|
|
|
|
FPU_RESTORE_MODE();
|
|
}
|
|
|
|
void __glSpanCopy(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *inspan, GLvoid *outspan)
|
|
{
|
|
GLint totalSize = spanInfo->realWidth * spanInfo->srcComponents *
|
|
spanInfo->srcElementSize;
|
|
|
|
__GL_MEMCOPY(outspan, inspan, totalSize);
|
|
}
|
|
|
|
/*
|
|
** Packs to any index of type BITMAP from a span of the same
|
|
** format of type FLOAT.
|
|
*/
|
|
void __glSpanPackBitmap(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
|
|
GLvoid *inspan, GLvoid *outspan)
|
|
{
|
|
GLint i,j;
|
|
GLint width;
|
|
GLvoid *userData;
|
|
GLfloat *spanData;
|
|
GLint lsbFirst;
|
|
GLint startBit;
|
|
GLint bit;
|
|
GLubyte ubyte, mask;
|
|
|
|
#ifdef __GL_LINT
|
|
gc = gc;
|
|
#endif
|
|
|
|
width = spanInfo->width;
|
|
userData = outspan;
|
|
spanData = (GLfloat *) inspan;
|
|
|
|
lsbFirst = spanInfo->dstLsbFirst;
|
|
startBit = spanInfo->dstStartBit;
|
|
|
|
i = width;
|
|
bit = startBit;
|
|
ubyte = *(GLubyte *) userData;
|
|
|
|
if (lsbFirst) {
|
|
if (bit) {
|
|
switch(bit) {
|
|
case 1:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x02;
|
|
else ubyte &= ~0x02;
|
|
if (--i == 0) break;
|
|
case 2:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x04;
|
|
else ubyte &= ~0x04;
|
|
if (--i == 0) break;
|
|
case 3:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x08;
|
|
else ubyte &= ~0x08;
|
|
if (--i == 0) break;
|
|
case 4:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x10;
|
|
else ubyte &= ~0x10;
|
|
if (--i == 0) break;
|
|
case 5:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x20;
|
|
else ubyte &= ~0x20;
|
|
if (--i == 0) break;
|
|
case 6:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x40;
|
|
else ubyte &= ~0x40;
|
|
if (--i == 0) break;
|
|
case 7:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x80;
|
|
else ubyte &= ~0x80;
|
|
i--;
|
|
}
|
|
*(GLubyte *) userData = ubyte;
|
|
userData = (GLvoid *) ((GLubyte *) userData + 1);
|
|
}
|
|
while (i >= 8) {
|
|
ubyte = 0;
|
|
i -= 8;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x01;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x02;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x04;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x08;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x10;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x20;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x40;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x80;
|
|
*(GLubyte *) userData = ubyte;
|
|
userData = (GLvoid *) ((GLubyte *) userData + 1);
|
|
}
|
|
if (i) {
|
|
ubyte = *(GLubyte *) userData;
|
|
mask = 0x01;
|
|
while (i-- > 0) {
|
|
if (((GLint) *spanData++) & 1) ubyte |= mask;
|
|
else ubyte &= ~mask;
|
|
mask <<= 1;
|
|
}
|
|
*(GLubyte *) userData = ubyte;
|
|
}
|
|
} else {
|
|
if (bit) {
|
|
switch(bit) {
|
|
case 1:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x40;
|
|
else ubyte &= ~0x40;
|
|
if (--i == 0) break;
|
|
case 2:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x20;
|
|
else ubyte &= ~0x20;
|
|
if (--i == 0) break;
|
|
case 3:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x10;
|
|
else ubyte &= ~0x10;
|
|
if (--i == 0) break;
|
|
case 4:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x08;
|
|
else ubyte &= ~0x08;
|
|
if (--i == 0) break;
|
|
case 5:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x04;
|
|
else ubyte &= ~0x04;
|
|
if (--i == 0) break;
|
|
case 6:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x02;
|
|
else ubyte &= ~0x02;
|
|
if (--i == 0) break;
|
|
case 7:
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x01;
|
|
else ubyte &= ~0x01;
|
|
i--;
|
|
}
|
|
*(GLubyte *) userData = ubyte;
|
|
userData = (GLvoid *) ((GLubyte *) userData + 1);
|
|
}
|
|
while (i >= 8) {
|
|
ubyte = 0;
|
|
i -= 8;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x80;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x40;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x20;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x10;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x08;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x04;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x02;
|
|
if (((GLint) *spanData++) & 1) ubyte |= 0x01;
|
|
*(GLubyte *) userData = ubyte;
|
|
userData = (GLvoid *) ((GLubyte *) userData + 1);
|
|
}
|
|
if (i) {
|
|
ubyte = *(GLubyte *) userData;
|
|
mask = 0x80;
|
|
while (i-- > 0) {
|
|
if (((GLint) *spanData++) & 1) ubyte |= mask;
|
|
else ubyte &= ~mask;
|
|
mask >>= 1;
|
|
}
|
|
*(GLubyte *) userData = ubyte;
|
|
}
|
|
}
|
|
}
|