Retire miniglx and move the actual glx code up to src/glx

1 files changed, 461 insertions, 0 deletions

diff --git a/src/glx/pixel.c b/src/glx/pixel.c
new file mode 100644
index 0000000000..d36ca31e7d
--- /dev/null
+++ b/src/glx/pixel.c
@@ -0,0 +1,461 @@
+/*
+ * 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(__GLXcontext * 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(__GLXcontext * 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(__GLXcontext * 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(__GLXcontext * 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;
+      }
+   }
+}