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windows-nt/Source/XPSP1/NT/multimedia/opengl/server/pixel/px_unpac.c

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2020-09-26 03:20:57 -05:00
/*
** 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** This is UNPUBLISHED PROPRIETARY SOURCE CODE of Silicon Graphics, Inc.;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 Unpublished -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 routines to unpack data from the user's data space
** into a span of pixels which can then be rendered.
*/
/*
** Return the number of elements per group of a specified format
*/
GLint FASTCALL __glElementsPerGroup(GLenum format)
{
switch(format) {
case GL_RGB:
#ifdef GL_EXT_bgra
case GL_BGR_EXT:
#endif
return 3;
case GL_LUMINANCE_ALPHA:
case __GL_RED_ALPHA:
return 2;
case GL_RGBA:
#ifdef GL_EXT_bgra
case GL_BGRA_EXT:
#endif
return 4;
default:
return 1;
}
}
/*
** Return the number of bytes per element, based on the element type
*/
__GLfloat FASTCALL __glBytesPerElement(GLenum type)
{
switch(type) {
case GL_BITMAP:
return ((__GLfloat) 1.0 / (__GLfloat) 8.0);
case GL_UNSIGNED_SHORT:
case GL_SHORT:
return 2;
case GL_UNSIGNED_BYTE:
case GL_BYTE:
return 1;
case GL_INT:
case GL_UNSIGNED_INT:
case GL_FLOAT:
default:
return 4;
}
}
void FASTCALL __glInitUnpacker(__GLcontext *gc, __GLpixelSpanInfo *spanInfo)
{
GLint alignment;
GLint lsb_first;
GLint components;
GLint element_size;
GLint rowsize;
GLint padding;
GLint group_size;
GLint groups_per_line;
GLint skip_pixels, skip_lines;
GLint swap_bytes;
GLenum format, type;
const GLvoid *pixels;
format = spanInfo->srcFormat;
type = spanInfo->srcType;
pixels = spanInfo->srcImage;
skip_pixels = spanInfo->srcSkipPixels;
skip_lines = spanInfo->srcSkipLines;
alignment = spanInfo->srcAlignment;
lsb_first = spanInfo->srcLsbFirst;
swap_bytes = spanInfo->srcSwapBytes;
components = __glElementsPerGroup(format);
groups_per_line = spanInfo->srcLineLength;
element_size = __glBytesPerElement(type);
if (element_size == 1) swap_bytes = 0;
group_size = element_size * components;
rowsize = groups_per_line * group_size;
if (type == GL_BITMAP) {
rowsize = (groups_per_line + 7)/8;
}
padding = (rowsize % alignment);
if (padding) {
rowsize += alignment - padding;
}
if (((skip_pixels & 0x7) && type == GL_BITMAP) ||
(swap_bytes && element_size > 1)) {
spanInfo->srcPackedData = GL_FALSE;
} else {
spanInfo->srcPackedData = GL_TRUE;
}
if (type == GL_BITMAP) {
spanInfo->srcCurrent = (GLvoid *) (((const GLubyte *) pixels) +
skip_lines * rowsize + skip_pixels / 8);
spanInfo->srcStartBit = skip_pixels % 8;
} else {
spanInfo->srcCurrent = (GLvoid *) (((const GLubyte *) pixels) +
skip_lines * rowsize + skip_pixels * group_size);
}
spanInfo->srcRowIncrement = rowsize;
spanInfo->srcGroupIncrement = group_size;
spanInfo->srcComponents = components;
spanInfo->srcElementSize = element_size;
}
/*
** An unpacker that unpacks from BITMAP source data, into FLOAT spans.
**
** zoomx is assumed to be less than 1.0 and greater than -1.0.
*/
void __glSpanUnpackBitmap(__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;
GLshort *pixelArray;
GLint skipCount;
__GLfloat zero, one;
userData = inspan;
spanData = (GLfloat *) outspan;
pixelArray = spanInfo->pixelArray;
width = spanInfo->width;
lsbFirst = spanInfo->srcLsbFirst;
startBit = spanInfo->srcStartBit;
i = width;
bit = startBit;
ubyte = *(GLubyte *) userData;
zero = __glZero;
one = __glOne;
skipCount = 1;
if (lsbFirst) {
switch(bit) {
case 1:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x02) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 2:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x04) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 3:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x08) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 4:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x10) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 5:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x20) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 6:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x40) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 7:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x80) *spanData++ = one;
else *spanData++ = zero;
}
i--;
userData = (GLvoid *) ((GLubyte *) userData + 1);
case 0:
break;
}
while (i >= 8) {
ubyte = *(GLubyte *) userData;
userData = (GLvoid *) ((GLubyte *) userData + 1);
i -= 8;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x01) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x02) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x04) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x08) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x10) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x20) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x40) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x80) *spanData++ = one;
else *spanData++ = zero;
}
}
if (i) {
ubyte = *(GLubyte *) userData;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x01) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x02) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x04) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x08) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x10) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x20) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x40) *spanData++ = one;
else *spanData++ = zero;
}
}
} else {
switch(bit) {
case 1:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x40) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 2:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x20) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 3:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x10) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 4:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x08) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 5:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x04) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 6:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x02) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) break;
case 7:
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x01) *spanData++ = one;
else *spanData++ = zero;
}
i--;
userData = (GLvoid *) ((GLubyte *) userData + 1);
case 0:
break;
}
while (i >= 8) {
ubyte = *(GLubyte *) userData;
userData = (GLvoid *) ((GLubyte *) userData + 1);
i -= 8;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x80) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x40) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x20) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x10) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x08) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x04) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x02) *spanData++ = one;
else *spanData++ = zero;
}
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x01) *spanData++ = one;
else *spanData++ = zero;
}
}
if (i) {
ubyte = *(GLubyte *) userData;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x80) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x40) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x20) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x10) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x08) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x04) *spanData++ = one;
else *spanData++ = zero;
}
if (--i == 0) return;
if (--skipCount == 0) {
skipCount = *pixelArray++;
if (ubyte & 0x02) *spanData++ = one;
else *spanData++ = zero;
}
}
}
}
/*
** An unpacker that unpacks from BITMAP source data, into FLOAT spans.
**
** zoomx is assumed to be less than or equal to -1.0 or greater than or
** equal to 1.0.
*/
void __glSpanUnpackBitmap2(__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;
width = spanInfo->realWidth;
userData = inspan;
spanData = (GLfloat *) outspan;
lsbFirst = spanInfo->srcLsbFirst;
startBit = spanInfo->srcStartBit;
i = width;
bit = startBit;
ubyte = *(GLubyte *) userData;
if (lsbFirst) {
switch(bit) {
case 1:
if (ubyte & 0x02) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 2:
if (ubyte & 0x04) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 3:
if (ubyte & 0x08) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 4:
if (ubyte & 0x10) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 5:
if (ubyte & 0x20) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 6:
if (ubyte & 0x40) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 7:
if (ubyte & 0x80) *spanData++ = __glOne;
else *spanData++ = __glZero;
i--;
userData = (GLvoid *) ((GLubyte *) userData + 1);
case 0:
break;
}
while (i >= 8) {
ubyte = *(GLubyte *) userData;
userData = (GLvoid *) ((GLubyte *) userData + 1);
i -= 8;
if (ubyte & 0x01) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x02) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x04) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x08) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x10) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x20) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x40) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x80) *spanData++ = __glOne;
else *spanData++ = __glZero;
}
if (i) {
ubyte = *(GLubyte *) userData;
if (ubyte & 0x01) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x02) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x04) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x08) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x10) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x20) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x40) *spanData++ = __glOne;
else *spanData++ = __glZero;
}
} else {
switch(bit) {
case 1:
if (ubyte & 0x40) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 2:
if (ubyte & 0x20) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 3:
if (ubyte & 0x10) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 4:
if (ubyte & 0x08) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 5:
if (ubyte & 0x04) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 6:
if (ubyte & 0x02) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) break;
case 7:
if (ubyte & 0x01) *spanData++ = __glOne;
else *spanData++ = __glZero;
i--;
userData = (GLvoid *) ((GLubyte *) userData + 1);
case 0:
break;
}
while (i >= 8) {
ubyte = *(GLubyte *) userData;
userData = (GLvoid *) ((GLubyte *) userData + 1);
i -= 8;
if (ubyte & 0x80) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x40) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x20) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x10) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x08) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x04) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x02) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (ubyte & 0x01) *spanData++ = __glOne;
else *spanData++ = __glZero;
}
if (i) {
ubyte = *(GLubyte *) userData;
if (ubyte & 0x80) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x40) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x20) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x10) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x08) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x04) *spanData++ = __glOne;
else *spanData++ = __glZero;
if (--i == 0) return;
if (ubyte & 0x02) *spanData++ = __glOne;
else *spanData++ = __glZero;
}
}
}
/*
** An unpacker that unpacks from RGB, UNSIGNED_BYTE source data, into
** RGB, UNSIGNED_BYTE spans.
**
** zoomx is assumed to be less than 1.0 and greater than -1.0.
*/
void __glSpanUnpackRGBubyte(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLubyte *userData;
GLubyte *spanData;
GLint width, groupInc;
GLshort *pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
width = spanInfo->realWidth;
groupInc = spanInfo->srcGroupIncrement;
userData = (GLubyte *) inspan;
spanData = (GLubyte *) outspan;
pixelArray = spanInfo->pixelArray;
i = 0;
do {
spanData[0] = userData[0];
spanData[1] = userData[1];
spanData[2] = userData[2];
spanData += 3;
skipCount = *pixelArray++;
userData = (GLubyte *) ((GLubyte *) userData + 3 * skipCount);
i++;
} while (i<width);
}
/*
** An unpacker that unpacks from either index, UNSIGNED_BYTE source data,
** into UNSIGNED_BYTE spans.
**
** zoomx is assumed to be less than 1.0 and greater than -1.0.
*/
void __glSpanUnpackIndexUbyte(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLubyte *userData;
GLubyte *spanData;
GLint width, groupInc;
GLshort *pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
width = spanInfo->realWidth;
groupInc = spanInfo->srcGroupIncrement;
userData = (GLubyte *) inspan;
spanData = (GLubyte *) outspan;
pixelArray = spanInfo->pixelArray;
i = 0;
do {
*spanData = *userData;
spanData++;
skipCount = *pixelArray++;
userData = (GLubyte *) ((GLubyte *) userData + skipCount);
i++;
} while (i<width);
}
/*
** An unpacker that unpacks from RGBA, UNSIGNED_BYTE source data, into
** RGBA, UNSIGNED_BYTE spans.
**
** This could be faster if we could assume that the first ubyte (red)
** was aligned on a word boundary. Then we could just use unsigned int
** pointers to copy the user's data. This might be a reasonable future
** optimization.
**
** zoomx is assumed to be less than 1.0 and greater than -1.0.
*/
void __glSpanUnpackRGBAubyte(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLubyte *userData;
GLubyte *spanData;
GLint width, groupInc;
GLshort *pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
width = spanInfo->realWidth;
groupInc = spanInfo->srcGroupIncrement;
userData = (GLubyte *) inspan;
spanData = (GLubyte *) outspan;
pixelArray = spanInfo->pixelArray;
i = 0;
do {
spanData[0] = userData[0];
spanData[1] = userData[1];
spanData[2] = userData[2];
spanData[3] = userData[3];
spanData += 4;
skipCount = *pixelArray++;
userData = (GLubyte *) ((GLubyte *) userData + (skipCount << 2));
i++;
} while (i<width);
}
/*
** Swaps bytes from an incoming span of two byte objects to an outgoing span.
** No pixel skipping is performed.
*/
void __glSpanSwapBytes2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
a = inData[0];
b = inData[1];
outData[0] = b;
outData[1] = a;
outData += 2;
inData += 2;
}
}
/*
** Swaps bytes from an incoming span of two byte objects to an outgoing span.
** No pixel skipping is performed. This version is for swapping to the
** desination image.
*/
void __glSpanSwapBytes2Dst(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b;
GLint components = spanInfo->dstComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
a = inData[0];
b = inData[1];
outData[0] = b;
outData[1] = a;
outData += 2;
inData += 2;
}
}
/*
** Swaps bytes from an incoming span of two byte objects to an outgoing span.
** Pixel skipping is performed.
*/
void __glSpanSwapAndSkipBytes2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i,j;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b;
GLint components = spanInfo->srcComponents;
GLint groupInc = spanInfo->srcGroupIncrement;
GLshort *pixelArray = spanInfo->pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<width; i++) {
for (j=0; j<components; j++) {
a = inData[0];
b = inData[1];
outData[0] = b;
outData[1] = a;
outData += 2;
inData += 2;
}
skipCount = (*pixelArray++) - 1;
inData = (GLubyte *) ((GLubyte *) inData + (skipCount * groupInc));
}
}
/*
** Swaps bytes from an incoming span of four byte objects to an outgoing span.
** No pixel skipping is performed.
*/
void __glSpanSwapBytes4(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b,c,d;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
c = inData[2];
d = inData[3];
a = inData[0];
b = inData[1];
outData[0] = d;
outData[1] = c;
outData[2] = b;
outData[3] = a;
outData += 4;
inData += 4;
}
}
/*
** Swaps bytes from an incoming span of four byte objects to an outgoing span.
** No pixel skipping is performed. This version is for swapping to the
** destination image.
*/
void __glSpanSwapBytes4Dst(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b,c,d;
GLint components = spanInfo->dstComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
c = inData[2];
d = inData[3];
a = inData[0];
b = inData[1];
outData[0] = d;
outData[1] = c;
outData[2] = b;
outData[3] = a;
outData += 4;
inData += 4;
}
}
/*
** Swaps bytes from an incoming span of four byte objects to an outgoing span.
** Pixel skipping is performed.
*/
void __glSpanSwapAndSkipBytes4(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i,j;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b,c,d;
GLint components = spanInfo->srcComponents;
GLint groupInc = spanInfo->srcGroupIncrement;
GLshort *pixelArray = spanInfo->pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<width; i++) {
for (j=0; j<components; j++) {
c = inData[2];
d = inData[3];
outData[0] = d;
outData[1] = c;
a = inData[0];
b = inData[1];
outData[2] = b;
outData[3] = a;
outData += 4;
inData += 4;
}
skipCount = (*pixelArray++) - 1;
inData = (GLubyte *) ((GLubyte *) inData + (skipCount * groupInc));
}
}
/*
** A span modifier that skips pixels according to the pixel skip array.
** Components are assumed to be 1 byte in size.
*/
void __glSpanSkipPixels1(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i,j;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLint components = spanInfo->srcComponents;
GLint groupInc = spanInfo->srcGroupIncrement;
GLshort *pixelArray = spanInfo->pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<width; i++) {
for (j=0; j<components; j++) {
*outData++ = *inData++;
}
skipCount = (*pixelArray++) - 1;
inData = (GLubyte *) ((GLubyte *) inData + (skipCount * groupInc));
}
}
/*
** A span modifier that skips pixels according to the pixel skip array.
** Components are assumed to be 2 bytes in size, and aligned on a half
** word boundary.
*/
void __glSpanSkipPixels2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i,j;
GLint width = spanInfo->realWidth;
GLushort *inData = (GLushort *) inspan;
GLushort *outData = (GLushort *) outspan;
GLint components = spanInfo->srcComponents;
GLint groupInc = spanInfo->srcGroupIncrement;
GLshort *pixelArray = spanInfo->pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<width; i++) {
for (j=0; j<components; j++) {
*outData++ = *inData++;
}
skipCount = (*pixelArray++) - 1;
inData = (GLushort *) ((GLubyte *) inData + (skipCount * groupInc));
}
}
/*
** A span modifier that skips pixels according to the pixel skip array.
** Components are assumed to be 4 bytes in size, and aligned on a word
** boundary.
*/
void __glSpanSkipPixels4(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i,j;
GLint width = spanInfo->realWidth;
GLuint *inData = (GLuint *) inspan;
GLuint *outData = (GLuint *) outspan;
GLint components = spanInfo->srcComponents;
GLint groupInc = spanInfo->srcGroupIncrement;
GLshort *pixelArray = spanInfo->pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<width; i++) {
for (j=0; j<components; j++) {
*outData++ = *inData++;
}
skipCount = (*pixelArray++) - 1;
inData = (GLuint *) ((GLubyte *) inData + (skipCount * groupInc));
}
}
/*
** A span modifier that skips pixels according to the pixel skip array.
** Components are assumed to be 2 bytes in size. No alignment is assumed,
** so misaligned data should use this path.
*/
void __glSpanSlowSkipPixels2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i,j;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b;
GLint components = spanInfo->srcComponents;
GLint groupInc = spanInfo->srcGroupIncrement;
GLshort *pixelArray = spanInfo->pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<width; i++) {
for (j=0; j<components; j++) {
a = inData[0];
b = inData[1];
outData[0] = a;
outData[1] = b;
outData += 2;
inData += 2;
}
skipCount = (*pixelArray++) - 1;
inData = ((GLubyte *) inData + (skipCount * groupInc));
}
}
/*
** A span modifier that skips pixels according to the pixel skip array.
** Components are assumed to be 4 bytes in size. No alignment is assumed,
** so misaligned data should use this path.
*/
void __glSpanSlowSkipPixels4(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i,j;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b,c,d;
GLint components = spanInfo->srcComponents;
GLint groupInc = spanInfo->srcGroupIncrement;
GLshort *pixelArray = spanInfo->pixelArray;
GLint skipCount;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<width; i++) {
for (j=0; j<components; j++) {
a = inData[0];
b = inData[1];
c = inData[2];
d = inData[3];
outData[0] = a;
outData[1] = b;
outData[2] = c;
outData[3] = d;
outData += 4;
inData += 4;
}
skipCount = (*pixelArray++) - 1;
inData = ((GLubyte *) inData + (skipCount * groupInc));
}
}
/*
** A span modifier that aligns pixels 2 bytes in size. No alignment is
** assumed, so misaligned data should use this path.
*/
void __glSpanAlignPixels2(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
a = inData[0];
b = inData[1];
outData[0] = a;
outData[1] = b;
outData += 2;
inData += 2;
}
}
/*
** A span modifier that aligns pixels 2 bytes in size. No alignment is
** assumed, so misaligned data should use this path. This version is for
** aligning to the destination image.
*/
void __glSpanAlignPixels2Dst(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b;
GLint components = spanInfo->dstComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
a = inData[0];
b = inData[1];
outData[0] = a;
outData[1] = b;
outData += 2;
inData += 2;
}
}
/*
** A span modifier that aligns pixels 4 bytes in size. No alignment is
** assumed, so misaligned data should use this path.
*/
void __glSpanAlignPixels4(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b,c,d;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
a = inData[0];
b = inData[1];
c = inData[2];
d = inData[3];
outData[0] = a;
outData[1] = b;
outData[2] = c;
outData[3] = d;
outData += 4;
inData += 4;
}
}
/*
** A span modifier that aligns pixels 4 bytes in size. No alignment is
** assumed, so misaligned data should use this path. This version is
** for swapping to the destination image.
*/
void __glSpanAlignPixels4Dst(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLubyte *outData = (GLubyte *) outspan;
GLubyte a,b,c,d;
GLint components = spanInfo->dstComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
a = inData[0];
b = inData[1];
c = inData[2];
d = inData[3];
outData[0] = a;
outData[1] = b;
outData[2] = c;
outData[3] = d;
outData += 4;
inData += 4;
}
}
/*
** Unpacks from any component of type UNSIGNED_BYTE to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackUbyte(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = __GL_UB_TO_FLOAT(*inData++);
}
}
/*
** Unpacks from any component of type BYTE to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackByte(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLbyte *inData = (GLbyte *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = __GL_B_TO_FLOAT(*inData++);
}
}
/*
** Unpacks from any component of type UNSIGNED_SHORT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackUshort(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLushort *inData = (GLushort *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = __GL_US_TO_FLOAT(*inData++);
}
}
/*
** Unpacks from any component of type SHORT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackShort(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLshort *inData = (GLshort *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = __GL_S_TO_FLOAT(*inData++);
}
}
/*
** Unpacks from any component of type UNSIGNED_INT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackUint(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLuint *inData = (GLuint *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = __GL_UI_TO_FLOAT(*inData++);
}
}
/*
** Unpacks from any component of type INT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackInt(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLint *inData = (GLint *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = __GL_I_TO_FLOAT(*inData++);
}
}
/*
** Unpacks from any index of type UNSIGNED_BYTE to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackUbyteI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint totalSize = spanInfo->realWidth;
GLubyte *inData = (GLubyte *) inspan;
GLfloat *outData = (GLfloat *) outspan;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = *inData++;
}
}
/*
** Unpacks from any index of type BYTE to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackByteI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint totalSize = spanInfo->realWidth;
GLbyte *inData = (GLbyte *) inspan;
GLfloat *outData = (GLfloat *) outspan;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = *inData++;
}
}
/*
** Unpacks from any index of type UNSIGNED_SHORT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackUshortI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint totalSize = spanInfo->realWidth;
GLushort *inData = (GLushort *) inspan;
GLfloat *outData = (GLfloat *) outspan;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = *inData++;
}
}
/*
** Unpacks from any index of type SHORT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackShortI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint totalSize = spanInfo->realWidth;
GLshort *inData = (GLshort *) inspan;
GLfloat *outData = (GLfloat *) outspan;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = *inData++;
}
}
/*
** Unpacks from any index of type UNSIGNED_INT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackUintI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint totalSize = spanInfo->realWidth;
GLuint *inData = (GLuint *) inspan;
GLfloat *outData = (GLfloat *) outspan;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = *inData++;
}
}
/*
** Unpacks from any index of type INT to a span of the same
** format of type FLOAT.
*/
void __glSpanUnpackIntI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint totalSize = spanInfo->realWidth;
GLint *inData = (GLint *) inspan;
GLfloat *outData = (GLfloat *) outspan;
#ifdef __GL_LINT
gc = gc;
#endif
for (i=0; i<totalSize; i++) {
*outData++ = *inData++;
}
}
/*
** Clamps from any type FLOAT to a span of the same format of type FLOAT.
*/
void __glSpanClampFloat(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
GLfloat *inData = (GLfloat *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLfloat r, one, zero;
one = __glOne;
zero = __glZero;
for (i=0; i<totalSize; i++) {
r = *inData++;
if (r > one) r = one;
else if (r < zero) r = zero;
*outData++ = r;
}
}
/*
** Clamps from a signed FLOAT [-1, 1] to a span of the same format of type
** FLOAT.
*/
void __glSpanClampSigned(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLint components = spanInfo->srcComponents;
GLint totalSize = width * components;
GLfloat *inData = (GLfloat *) inspan;
GLfloat *outData = (GLfloat *) outspan;
GLfloat r, zero;
zero = __glZero;
for (i=0; i<totalSize; i++) {
r = *inData++;
if (r < zero) r = zero;
*outData++ = r;
}
}
/*
** Expands and scales a RED, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandRed(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat zero = __glZero;
GLfloat as = gc->frontBuffer.alphaScale;
GLfloat rs = gc->frontBuffer.redScale;
for (i=0; i<width; i++) {
*outData++ = *inData++ * rs; /* Red */
*outData++ = zero; /* Green */
*outData++ = zero; /* Blue */
*outData++ = as; /* Alpha */
}
}
/*
** Expands and scales a GREEN, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandGreen(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat zero = __glZero;
GLfloat gs = gc->frontBuffer.greenScale;
GLfloat as = gc->frontBuffer.alphaScale;
for (i=0; i<width; i++) {
*outData++ = zero; /* Red */
*outData++ = *inData++ * gs; /* Green */
*outData++ = zero; /* Blue */
*outData++ = as; /* Alpha */
}
}
/*
** Expands and scales a BLUE, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandBlue(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat zero = __glZero;
GLfloat bs = gc->frontBuffer.blueScale;
GLfloat as = gc->frontBuffer.alphaScale;
for (i=0; i<width; i++) {
*outData++ = zero; /* Red */
*outData++ = zero; /* Green */
*outData++ = *inData++ * bs; /* Blue */
*outData++ = as; /* Alpha */
}
}
/*
** Expands and scales an ALPHA, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandAlpha(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat zero = __glZero;
GLfloat as = gc->frontBuffer.alphaScale;
for (i=0; i<width; i++) {
*outData++ = zero; /* Red */
*outData++ = zero; /* Green */
*outData++ = zero; /* Blue */
*outData++ = *inData++ * as; /* Alpha */
}
}
/*
** Expands and scales an RGB, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandRGB(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat r,g,b;
GLfloat rs,gs,bs;
GLfloat as = gc->frontBuffer.alphaScale;
rs = gc->frontBuffer.redScale;
gs = gc->frontBuffer.greenScale;
bs = gc->frontBuffer.blueScale;
for (i=0; i<width; i++) {
r = *inData++ * rs;
g = *inData++ * gs;
b = *inData++ * bs;
*outData++ = r;
*outData++ = g;
*outData++ = b;
*outData++ = as; /* Alpha */
}
}
#ifdef GL_EXT_bgra
/*
** Expands and scales a BGR, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandBGR(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat r,g,b;
GLfloat rs,gs,bs;
GLfloat as = gc->frontBuffer.alphaScale;
rs = gc->frontBuffer.redScale;
gs = gc->frontBuffer.greenScale;
bs = gc->frontBuffer.blueScale;
for (i=0; i<width; i++) {
b = *inData++ * bs;
g = *inData++ * gs;
r = *inData++ * rs;
*outData++ = r;
*outData++ = g;
*outData++ = b;
*outData++ = as; /* Alpha */
}
}
#endif
/*
** Expands and scales a LUMINANCE, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandLuminance(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat comp;
GLfloat rs,gs,bs;
GLfloat as = gc->frontBuffer.alphaScale;
rs = gc->frontBuffer.redScale;
gs = gc->frontBuffer.greenScale;
bs = gc->frontBuffer.blueScale;
for (i=0; i<width; i++) {
comp = *inData++;
*outData++ = comp * rs; /* Red */
*outData++ = comp * gs; /* Green */
*outData++ = comp * bs; /* Blue */
*outData++ = as; /* Alpha */
}
}
/*
** Expands and scales a LUMINANCE_ALPHA, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandLuminanceAlpha(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat comp;
GLfloat rs,gs,bs;
GLfloat as = gc->frontBuffer.alphaScale;
rs = gc->frontBuffer.redScale;
gs = gc->frontBuffer.greenScale;
bs = gc->frontBuffer.blueScale;
for (i=0; i<width; i++) {
comp = *inData++;
*outData++ = comp * rs; /* Red */
*outData++ = comp * gs; /* Green */
*outData++ = comp * bs; /* Blue */
*outData++ = *inData++ * as; /* Alpha */
}
}
/*
** Expands and scales a __GL_RED_ALPHA, FLOAT span into a RGBA, FLOAT span.
*/
void __glSpanExpandRedAlpha(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i;
GLint width = spanInfo->realWidth;
GLfloat *outData = (GLfloat *) outspan;
GLfloat *inData = (GLfloat *) inspan;
GLfloat comp;
GLfloat zero;
GLfloat rs,gs,bs;
GLfloat as = gc->frontBuffer.alphaScale;
rs = gc->frontBuffer.redScale;
zero = __glZero;
for (i=0; i<width; i++) {
comp = *inData++;
*outData++ = comp * rs; /* Red */
*outData++ = zero;
*outData++ = zero;
*outData++ = *inData++ * as; /* Alpha */
}
}
/*
** The only span format supported by this routine is GL_RGBA, GL_FLOAT.
** The span is simply scaled by the frame buffer scaling factors.
*/
void __glSpanScaleRGBA(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i, width;
GLfloat rscale, gscale, bscale, ascale;
GLfloat red, green, blue, alpha;
GLfloat *inData, *outData;
width = spanInfo->realWidth;
inData = (GLfloat *) inspan;
outData = (GLfloat *) outspan;
rscale = gc->frontBuffer.redScale;
gscale = gc->frontBuffer.greenScale;
bscale = gc->frontBuffer.blueScale;
ascale = gc->frontBuffer.alphaScale;
for (i=0; i<width; i++) {
red = *inData++ * rscale;
green = *inData++ * gscale;
*outData++ = red;
*outData++ = green;
blue = *inData++ * bscale;
alpha = *inData++ * ascale;
*outData++ = blue;
*outData++ = alpha;
}
}
/*
** The only span format supported by this routine is GL_RGBA, GL_FLOAT.
** The span is simply unscaled by the frame buffer scaling factors.
*/
void __glSpanUnscaleRGBA(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i, width;
GLfloat rscale, gscale, bscale, ascale;
GLfloat red, green, blue, alpha;
GLfloat *inData, *outData;
width = spanInfo->realWidth;
inData = (GLfloat *) inspan;
outData = (GLfloat *) outspan;
rscale = gc->frontBuffer.oneOverRedScale;
gscale = gc->frontBuffer.oneOverGreenScale;
bscale = gc->frontBuffer.oneOverBlueScale;
ascale = gc->frontBuffer.oneOverAlphaScale;
for (i=0; i<width; i++) {
red = *inData++ * rscale;
green = *inData++ * gscale;
*outData++ = red;
*outData++ = green;
blue = *inData++ * bscale;
alpha = *inData++ * ascale;
*outData++ = blue;
*outData++ = alpha;
}
}
#ifdef GL_EXT_bgra
/*
** The only span format supported by this routine is GL_BGRA, GL_FLOAT.
** The span is scaled by the frame buffer scaling factors and swapped
** into RGBA order.
*/
void __glSpanScaleBGRA(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i, width;
GLfloat rscale, gscale, bscale, ascale;
GLfloat red, green, blue, alpha;
GLfloat *inData, *outData;
width = spanInfo->realWidth;
inData = (GLfloat *) inspan;
outData = (GLfloat *) outspan;
rscale = gc->frontBuffer.redScale;
gscale = gc->frontBuffer.greenScale;
bscale = gc->frontBuffer.blueScale;
ascale = gc->frontBuffer.alphaScale;
for (i=0; i<width; i++) {
blue = *inData++ * bscale;
green = *inData++ * gscale;
red = *inData++ * rscale;
alpha = *inData++ * ascale;
*outData++ = red;
*outData++ = green;
*outData++ = blue;
*outData++ = alpha;
}
}
/*
** The only input format supported by this routine is GL_RGBA, GL_FLOAT.
** The span is unscaled by the frame buffer scaling factors and swapped
** into BGRA order.
*/
void __glSpanUnscaleBGRA(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i, width;
GLfloat rscale, gscale, bscale, ascale;
GLfloat red, green, blue, alpha;
GLfloat *inData, *outData;
width = spanInfo->realWidth;
inData = (GLfloat *) inspan;
outData = (GLfloat *) outspan;
rscale = gc->frontBuffer.oneOverRedScale;
gscale = gc->frontBuffer.oneOverGreenScale;
bscale = gc->frontBuffer.oneOverBlueScale;
ascale = gc->frontBuffer.oneOverAlphaScale;
for (i=0; i<width; i++) {
red = *inData++ * rscale;
green = *inData++ * gscale;
blue = *inData++ * bscale;
alpha = *inData++ * ascale;
*outData++ = blue;
*outData++ = green;
*outData++ = red;
*outData++ = alpha;
}
}
#endif
/*
** The only span format supported by this routine is palette index, GL_FLOAT.
** The span is simply scaled by the frame buffer scaling factors.
*/
#ifdef GL_EXT_paletted_texture
void __glSpanScalePI(__GLcontext *gc, __GLpixelSpanInfo *spanInfo,
GLvoid *inspan, GLvoid *outspan)
{
GLint i, width;
GLfloat rscale, gscale, bscale, ascale;
GLfloat red, green, blue, alpha;
GLfloat *inData, *outData;
RGBQUAD *rgb;
width = spanInfo->realWidth;
inData = (GLfloat *) inspan;
outData = (GLfloat *) outspan;
// Throw in an extra scaling of 1/255 because the palette
// data is in ubyte format
rscale = gc->frontBuffer.redScale*__glOneOver255;
gscale = gc->frontBuffer.greenScale*__glOneOver255;
bscale = gc->frontBuffer.blueScale*__glOneOver255;
ascale = gc->frontBuffer.alphaScale*__glOneOver255;
for (i=0; i<width; i++) {
rgb = &spanInfo->srcPalette[(int)((*inData++)*
spanInfo->srcPaletteSize)];
red = rgb->rgbRed * rscale;
green = rgb->rgbGreen * gscale;
*outData++ = red;
*outData++ = green;
blue = rgb->rgbBlue * bscale;
alpha = rgb->rgbReserved * ascale;
*outData++ = blue;
*outData++ = alpha;
}
}
#endif
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