/*
* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice including the dates of first publication and
* either this permission notice or a reference to
* http://oss.sgi.com/projects/FreeB/
* shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*
* Except as contained in this notice, the name of Silicon Graphics, Inc.
* shall not be used in advertising or otherwise to promote the sale, use or
* other dealings in this Software without prior written authorization from
* Silicon Graphics, Inc.
*/
#include "packrender.h"
static const GLubyte MsbToLsbTable[256] = {
0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0,
0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0,
0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8,
0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8,
0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4,
0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4,
0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec,
0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc,
0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2,
0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2,
0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea,
0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa,
0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6,
0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6,
0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee,
0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe,
0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1,
0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1,
0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9,
0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9,
0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5,
0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5,
0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed,
0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd,
0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3,
0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3,
0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb,
0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb,
0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7,
0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7,
0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef,
0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff,
};
static const GLubyte LowBitsMask[9] = {
0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff,
};
static const GLubyte HighBitsMask[9] = {
0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff,
};
/*
** Copy bitmap data from clients packed memory applying unpacking modes as the
** data is transfered into the destImage buffer. Return in modes the
** set of pixel modes that are to be done by the server.
*/
static void
FillBitmap(struct glx_context * gc, GLint width, GLint height,
GLenum format, const GLvoid * userdata, GLubyte * destImage)
{
const __GLXattribute *state = gc->client_state_private;
GLint rowLength = state->storeUnpack.rowLength;
GLint alignment = state->storeUnpack.alignment;
GLint skipPixels = state->storeUnpack.skipPixels;
GLint skipRows = state->storeUnpack.skipRows;
GLint lsbFirst = state->storeUnpack.lsbFirst;
GLint elementsLeft, bitOffset, currentByte, nextByte, highBitMask;
GLint lowBitMask, i;
GLint components, groupsPerRow, rowSize, padding, elementsPerRow;
const GLubyte *start, *iter;
if (rowLength > 0) {
groupsPerRow = rowLength;
}
else {
groupsPerRow = width;
}
components = __glElementsPerGroup(format, GL_BITMAP);
rowSize = (groupsPerRow * components + 7) >> 3;
padding = (rowSize % alignment);
if (padding) {
rowSize += alignment - padding;
}
start = ((const GLubyte *) userdata) + skipRows * rowSize +
((skipPixels * components) >> 3);
bitOffset = (skipPixels * components) & 7;
highBitMask = LowBitsMask[8 - bitOffset];
lowBitMask = HighBitsMask[bitOffset];
elementsPerRow = width * components;
for (i = 0; i < height; i++) {
elementsLeft = elementsPerRow;
iter = start;
while (elementsLeft) {
/* First retrieve low bits from current byte */
if (lsbFirst) {
currentByte = MsbToLsbTable[iter[0]];
}
else {
currentByte = iter[0];
}
if (bitOffset) {
/* Need to read next byte to finish current byte */
if (elementsLeft > (8 - bitOffset)) {
if (lsbFirst) {
nextByte = MsbToLsbTable[iter[1]];
}
else {
nextByte = iter[1];
}
currentByte =
((currentByte & highBitMask) << bitOffset) |
((nextByte & lowBitMask) >> (8 - bitOffset));
}
else {
currentByte = ((currentByte & highBitMask) << bitOffset);
}
}
if (elementsLeft >= 8) {
*destImage = currentByte;
elementsLeft -= 8;
}
else {
*destImage = currentByte & HighBitsMask[elementsLeft];
elementsLeft = 0;
}
destImage++;
iter++;
}
start += rowSize;
}
}
/*
** Extract array from user's data applying all pixel store modes.
** The internal packed array format used has LSB_FIRST = FALSE and
** ALIGNMENT = 1.
*/
void
__glFillImage(struct glx_context * gc, GLint dim, GLint width, GLint height,
GLint depth, GLenum format, GLenum type,
const GLvoid * userdata, GLubyte * newimage, GLubyte * modes)
{
const __GLXattribute *state = gc->client_state_private;
GLint rowLength = state->storeUnpack.rowLength;
GLint imageHeight = state->storeUnpack.imageHeight;
GLint alignment = state->storeUnpack.alignment;
GLint skipPixels = state->storeUnpack.skipPixels;
GLint skipRows = state->storeUnpack.skipRows;
GLint skipImages = state->storeUnpack.skipImages;
GLint swapBytes = state->storeUnpack.swapEndian;
GLint components, elementSize, rowSize, padding, groupsPerRow, groupSize;
GLint elementsPerRow, imageSize, rowsPerImage, h, i, j, k;
const GLubyte *start, *iter, *itera, *iterb, *iterc;
GLubyte *iter2;
if (type == GL_BITMAP) {
FillBitmap(gc, width, height, format, userdata, newimage);
}
else {
components = __glElementsPerGroup(format, type);
if (rowLength > 0) {
groupsPerRow = rowLength;
}
else {
groupsPerRow = width;
}
if (imageHeight > 0) {
rowsPerImage = imageHeight;
}
else {
rowsPerImage = height;
}
elementSize = __glBytesPerElement(type);
groupSize = elementSize * components;
if (elementSize == 1)
swapBytes = 0;
rowSize = groupsPerRow * groupSize;
padding = (rowSize % alignment);
if (padding) {
rowSize += alignment - padding;
}
imageSize = rowSize * rowsPerImage;
start = ((const GLubyte *) userdata) + skipImages * imageSize +
skipRows * rowSize + skipPixels * groupSize;
iter2 = newimage;
elementsPerRow = width * components;
if (swapBytes) {
itera = start;
for (h = 0; h < depth; h++) {
iterb = itera;
for (i = 0; i < height; i++) {
iterc = iterb;
for (j = 0; j < elementsPerRow; j++) {
for (k = 1; k <= elementSize; k++) {
iter2[k - 1] = iterc[elementSize - k];
}
iter2 += elementSize;
iterc += elementSize;
}
iterb += rowSize;
}
itera += imageSize;
}
}
else {
itera = start;
for (h = 0; h < depth; h++) {
if (rowSize == elementsPerRow * elementSize) {
/* Ha! This is mondo easy! */
__GLX_MEM_COPY(iter2, itera,
elementsPerRow * elementSize * height);
iter2 += elementsPerRow * elementSize * height;
}
else {
iter = itera;
for (i = 0; i < height; i++) {
__GLX_MEM_COPY(iter2, iter, elementsPerRow * elementSize);
iter2 += elementsPerRow * elementSize;
iter += rowSize;
}
}
itera += imageSize;
}
}
}
/* Setup store modes that describe what we just did */
if (modes) {
if (dim < 3) {
(void) memcpy(modes
, __glXDefaultPixelStore
+ 4, 20); }
else {
(void) memcpy(modes
, __glXDefaultPixelStore
+ 0, 36); }
}
}
/*
** Empty a bitmap in LSB_FIRST=GL_FALSE and ALIGNMENT=4 format packing it
** into the clients memory using the pixel store PACK modes.
*/
static void
EmptyBitmap(struct glx_context * gc, GLint width, GLint height,
GLenum format, const GLubyte * sourceImage, GLvoid * userdata)
{
const __GLXattribute *state = gc->client_state_private;
GLint rowLength = state->storePack.rowLength;
GLint alignment = state->storePack.alignment;
GLint skipPixels = state->storePack.skipPixels;
GLint skipRows = state->storePack.skipRows;
GLint lsbFirst = state->storePack.lsbFirst;
GLint components, groupsPerRow, rowSize, padding, elementsPerRow;
GLint sourceRowSize, sourcePadding, sourceSkip;
GLubyte *start, *iter;
GLint elementsLeft, bitOffset, currentByte, highBitMask, lowBitMask;
GLint writeMask, i;
GLubyte writeByte;
components = __glElementsPerGroup(format, GL_BITMAP);
if (rowLength > 0) {
groupsPerRow = rowLength;
}
else {
groupsPerRow = width;
}
rowSize = (groupsPerRow * components + 7) >> 3;
padding = (rowSize % alignment);
if (padding) {
rowSize += alignment - padding;
}
sourceRowSize = (width * components + 7) >> 3;
sourcePadding = (sourceRowSize % 4);
if (sourcePadding) {
sourceSkip = 4 - sourcePadding;
}
else {
sourceSkip = 0;
}
start = ((GLubyte *) userdata) + skipRows * rowSize +
((skipPixels * components) >> 3);
bitOffset = (skipPixels * components) & 7;
highBitMask = LowBitsMask[8 - bitOffset];
lowBitMask = HighBitsMask[bitOffset];
elementsPerRow = width * components;
for (i = 0; i < height; i++) {
elementsLeft = elementsPerRow;
iter = start;
writeMask = highBitMask;
writeByte = 0;
while (elementsLeft) {
/* Set up writeMask (to write to current byte) */
if (elementsLeft + bitOffset < 8) {
/* Need to trim writeMask */
writeMask &= HighBitsMask[bitOffset + elementsLeft];
}
if (lsbFirst) {
currentByte = MsbToLsbTable[iter[0]];
}
else {
currentByte = iter[0];
}
if (bitOffset) {
writeByte |= (sourceImage[0] >> bitOffset);
currentByte = (currentByte & ~writeMask) |
(writeByte & writeMask);
writeByte = (sourceImage[0] << (8 - bitOffset));
}
else {
currentByte = (currentByte & ~writeMask) |
(sourceImage[0] & writeMask);
}
if (lsbFirst) {
iter[0] = MsbToLsbTable[currentByte];
}
else {
iter[0] = currentByte;
}
if (elementsLeft >= 8) {
elementsLeft -= 8;
}
else {
elementsLeft = 0;
}
sourceImage++;
iter++;
writeMask = 0xff;
}
if (writeByte) {
/* Some data left over that still needs writing */
writeMask &= lowBitMask;
if (lsbFirst) {
currentByte = MsbToLsbTable[iter[0]];
}
else {
currentByte = iter[0];
}
currentByte = (currentByte & ~writeMask) | (writeByte & writeMask);
if (lsbFirst) {
iter[0] = MsbToLsbTable[currentByte];
}
else {
iter[0] = currentByte;
}
}
start += rowSize;
sourceImage += sourceSkip;
}
}
/*
** Insert array into user's data applying all pixel store modes.
** The packed array format from the server is LSB_FIRST = FALSE,
** SWAP_BYTES = the current pixel storage pack mode, and ALIGNMENT = 4.
** Named __glEmptyImage() because it is the opposite of __glFillImage().
*/
/* ARGSUSED */
void
__glEmptyImage(struct glx_context * gc, GLint dim, GLint width, GLint height,
GLint depth, GLenum format, GLenum type,
const GLubyte * sourceImage, GLvoid * userdata)
{
const __GLXattribute *state = gc->client_state_private;
GLint rowLength = state->storePack.rowLength;
GLint imageHeight = state->storePack.imageHeight;
GLint alignment = state->storePack.alignment;
GLint skipPixels = state->storePack.skipPixels;
GLint skipRows = state->storePack.skipRows;
GLint skipImages = state->storePack.skipImages;
GLint components, elementSize, rowSize, padding, groupsPerRow, groupSize;
GLint elementsPerRow, sourceRowSize, sourcePadding, h, i;
GLint imageSize, rowsPerImage;
GLubyte *start, *iter, *itera;
if (type == GL_BITMAP) {
EmptyBitmap(gc, width, height, format, sourceImage, userdata);
}
else {
components = __glElementsPerGroup(format, type);
if (rowLength > 0) {
groupsPerRow = rowLength;
}
else {
groupsPerRow = width;
}
if (imageHeight > 0) {
rowsPerImage = imageHeight;
}
else {
rowsPerImage = height;
}
elementSize = __glBytesPerElement(type);
groupSize = elementSize * components;
rowSize = groupsPerRow * groupSize;
padding = (rowSize % alignment);
if (padding) {
rowSize += alignment - padding;
}
sourceRowSize = width * groupSize;
sourcePadding = (sourceRowSize % 4);
if (sourcePadding) {
sourceRowSize += 4 - sourcePadding;
}
imageSize = sourceRowSize * rowsPerImage;
start = ((GLubyte *) userdata) + skipImages * imageSize +
skipRows * rowSize + skipPixels * groupSize;
elementsPerRow = width * components;
itera = start;
for (h = 0; h < depth; h++) {
if ((rowSize == sourceRowSize) && (sourcePadding == 0)) {
/* Ha! This is mondo easy! */
__GLX_MEM_COPY(itera, sourceImage,
elementsPerRow * elementSize * height);
sourceImage += elementsPerRow * elementSize * height;
}
else {
iter = itera;
for (i = 0; i < height; i++) {
__GLX_MEM_COPY(iter, sourceImage,
elementsPerRow * elementSize);
sourceImage += sourceRowSize;
iter += rowSize;
}
}
itera += imageSize;
}
}
}