nx-X11/extras/Mesa: Drop bundled Mesa, place a symlink to imported Git subtree of Mesa_6.4.1 instead.

1 files changed, 0 insertions, 1007 deletions

diff --git a/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c b/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c
deleted file mode 100644
index b6aa77757..000000000
--- a/nx-X11/extras/Mesa/src/mesa/swrast/s_drawpix.c
+++ /dev/null
@@ -1,1007 +0,0 @@
-/*
- * Mesa 3-D graphics library
- * Version:  6.4
- *
- * Copyright (C) 1999-2005  Brian Paul   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 and this permission notice 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
- * BRIAN PAUL 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.
- */
-
-
-#include "glheader.h"
-#include "bufferobj.h"
-#include "context.h"
-#include "convolve.h"
-#include "image.h"
-#include "macros.h"
-#include "imports.h"
-#include "pixel.h"
-
-#include "s_context.h"
-#include "s_drawpix.h"
-#include "s_pixeltex.h"
-#include "s_span.h"
-#include "s_stencil.h"
-#include "s_zoom.h"
-
-
-/*
- * Try to do a fast and simple RGB(a) glDrawPixels.
- * Return:  GL_TRUE if success, GL_FALSE if slow path must be used instead
- */
-static GLboolean
-fast_draw_pixels(GLcontext *ctx, GLint x, GLint y,
-                 GLsizei width, GLsizei height,
-                 GLenum format, GLenum type,
-                 const struct gl_pixelstore_attrib *unpack,
-                 const GLvoid *pixels)
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-   struct gl_renderbuffer *rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
-   struct sw_span span;
-
-   INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
-
-   if (!ctx->Current.RasterPosValid) {
-      return GL_TRUE;      /* no-op */
-   }
-   
-   if (swrast->_RasterMask & MULTI_DRAW_BIT)
-      return GL_FALSE;
-
-   if (ctx->Depth.Test)
-      _swrast_span_default_z(ctx, &span);
-   if (swrast->_FogEnabled)
-      _swrast_span_default_fog(ctx, &span);
-   if (ctx->Texture._EnabledCoordUnits)
-      _swrast_span_default_texcoords(ctx, &span);
-
-   if ((SWRAST_CONTEXT(ctx)->_RasterMask & ~CLIP_BIT) == 0
-       && ctx->Texture._EnabledCoordUnits == 0
-       && unpack->Alignment == 1
-       && !unpack->SwapBytes
-       && !unpack->LsbFirst) {
-
-      GLint destX = x;
-      GLint destY = y;
-      GLint drawWidth = width;           /* actual width drawn */
-      GLint drawHeight = height;         /* actual height drawn */
-      GLint skipPixels = unpack->SkipPixels;
-      GLint skipRows = unpack->SkipRows;
-      GLint rowLength;
-      GLint zoomY0 = 0;
-
-      if (unpack->RowLength > 0)
-         rowLength = unpack->RowLength;
-      else
-         rowLength = width;
-
-      /* If we're not using pixel zoom then do all clipping calculations
-       * now.  Otherwise, we'll let the _swrast_write_zoomed_*_span() functions
-       * handle the clipping.
-       */
-      if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
-         /* horizontal clipping */
-         if (destX < ctx->DrawBuffer->_Xmin) {
-            skipPixels += (ctx->DrawBuffer->_Xmin - destX);
-            drawWidth  -= (ctx->DrawBuffer->_Xmin - destX);
-            destX = ctx->DrawBuffer->_Xmin;
-         }
-         if (destX + drawWidth > ctx->DrawBuffer->_Xmax)
-            drawWidth -= (destX + drawWidth - ctx->DrawBuffer->_Xmax);
-         if (drawWidth <= 0)
-            return GL_TRUE;
-
-         /* vertical clipping */
-         if (destY < ctx->DrawBuffer->_Ymin) {
-            skipRows   += (ctx->DrawBuffer->_Ymin - destY);
-            drawHeight -= (ctx->DrawBuffer->_Ymin - destY);
-            destY = ctx->DrawBuffer->_Ymin;
-         }
-         if (destY + drawHeight > ctx->DrawBuffer->_Ymax)
-            drawHeight -= (destY + drawHeight - ctx->DrawBuffer->_Ymax);
-         if (drawHeight <= 0)
-            return GL_TRUE;
-      }
-      else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
-         /* upside-down image */
-         /* horizontal clipping */
-         if (destX < ctx->DrawBuffer->_Xmin) {
-            skipPixels += (ctx->DrawBuffer->_Xmin - destX);
-            drawWidth  -= (ctx->DrawBuffer->_Xmin - destX);
-            destX = ctx->DrawBuffer->_Xmin;
-         }
-         if (destX + drawWidth > ctx->DrawBuffer->_Xmax)
-            drawWidth -= (destX + drawWidth - ctx->DrawBuffer->_Xmax);
-         if (drawWidth <= 0)
-            return GL_TRUE;
-
-         /* vertical clipping */
-         if (destY > ctx->DrawBuffer->_Ymax) {
-            skipRows   += (destY - ctx->DrawBuffer->_Ymax);
-            drawHeight -= (destY - ctx->DrawBuffer->_Ymax);
-            destY = ctx->DrawBuffer->_Ymax;
-         }
-         if (destY - drawHeight < ctx->DrawBuffer->_Ymin)
-            drawHeight -= (ctx->DrawBuffer->_Ymin - (destY - drawHeight));
-         if (drawHeight <= 0)
-            return GL_TRUE;
-      }
-      else {
-         if (drawWidth > MAX_WIDTH)
-            return GL_FALSE; /* fall back to general case path */
-
-         /* save Y value of first row */
-         zoomY0 = IROUND(ctx->Current.RasterPos[1]);
-      }
-
-
-      /*
-       * Ready to draw!
-       * The window region at (destX, destY) of size (drawWidth, drawHeight)
-       * will be written to.
-       * We'll take pixel data from buffer pointed to by "pixels" but we'll
-       * skip "skipRows" rows and skip "skipPixels" pixels/row.
-       */
-
-      if (format == GL_RGBA && type == CHAN_TYPE
-          && ctx->_ImageTransferState==0) {
-         if (ctx->Visual.rgbMode) {
-            GLchan *src = (GLchan *) pixels
-               + (skipRows * rowLength + skipPixels) * 4;
-            if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
-               /* no zooming */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
-                  src += rowLength * 4;
-                  destY++;
-               }
-            }
-            else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
-               /* upside-down */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  destY--;
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY, src, NULL);
-                  src += rowLength * 4;
-               }
-            }
-            else {
-               /* with zooming */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  span.x = destX;
-                  span.y = destY;
-                  span.end = drawWidth;
-                  _swrast_write_zoomed_rgba_span(ctx, &span,
-                                        (CONST GLchan (*)[4]) src, zoomY0, 0);
-                  src += rowLength * 4;
-                  destY++;
-               }
-            }
-         }
-         return GL_TRUE;
-      }
-      else if (format == GL_RGB && type == CHAN_TYPE
-               && ctx->_ImageTransferState == 0) {
-         if (ctx->Visual.rgbMode) {
-            GLchan *src = (GLchan *) pixels
-               + (skipRows * rowLength + skipPixels) * 3;
-            if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
-                  src += rowLength * 3;
-                  destY++;
-               }
-            }
-            else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
-               /* upside-down */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  destY--;
-                  rb->PutRowRGB(ctx, rb, drawWidth, destX, destY, src, NULL);
-                  src += rowLength * 3;
-               }
-            }
-            else {
-               /* with zooming */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  span.x = destX;
-                  span.y = destY;
-                  span.end = drawWidth;
-                  _swrast_write_zoomed_rgb_span(ctx, &span, 
-                                         (CONST GLchan (*)[3]) src, zoomY0, 0);
-                  src += rowLength * 3;
-                  destY++;
-               }
-            }
-         }
-         return GL_TRUE;
-      }
-      else if (format == GL_LUMINANCE && type == CHAN_TYPE
-               && ctx->_ImageTransferState==0) {
-         if (ctx->Visual.rgbMode) {
-            GLchan *src = (GLchan *) pixels
-               + (skipRows * rowLength + skipPixels);
-            if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
-               /* no zooming */
-               GLint row;
-               ASSERT(drawWidth <= MAX_WIDTH);
-               for (row=0; row<drawHeight; row++) {
-                  GLint i;
-		  for (i=0;i<drawWidth;i++) {
-                     span.array->rgb[i][0] = src[i];
-                     span.array->rgb[i][1] = src[i];
-                     span.array->rgb[i][2] = src[i];
-		  }
-                  rb->PutRowRGB(ctx, rb, drawWidth, destX, destY,
-                                span.array->rgb, NULL);
-                  src += rowLength;
-                  destY++;
-               }
-            }
-            else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
-               /* upside-down */
-               GLint row;
-               ASSERT(drawWidth <= MAX_WIDTH);
-               for (row=0; row<drawHeight; row++) {
-                  GLint i;
-                  for (i=0;i<drawWidth;i++) {
-                     span.array->rgb[i][0] = src[i];
-                     span.array->rgb[i][1] = src[i];
-                     span.array->rgb[i][2] = src[i];
-                  }
-                  destY--;
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY,
-                             span.array->rgb, NULL);
-                  src += rowLength;
-               }
-            }
-            else {
-               /* with zooming */
-               GLint row;
-               ASSERT(drawWidth <= MAX_WIDTH);
-               for (row=0; row<drawHeight; row++) {
-                  GLint i;
-		  for (i=0;i<drawWidth;i++) {
-                     span.array->rgb[i][0] = src[i];
-                     span.array->rgb[i][1] = src[i];
-                     span.array->rgb[i][2] = src[i];
-		  }
-                  span.x = destX;
-                  span.y = destY;
-                  span.end = drawWidth;
-                  _swrast_write_zoomed_rgb_span(ctx, &span,
-                             (CONST GLchan (*)[3]) span.array->rgb, zoomY0, 0);
-                  src += rowLength;
-                  destY++;
-               }
-            }
-         }
-         return GL_TRUE;
-      }
-      else if (format == GL_LUMINANCE_ALPHA && type == CHAN_TYPE
-               && ctx->_ImageTransferState == 0) {
-         if (ctx->Visual.rgbMode) {
-            GLchan *src = (GLchan *) pixels
-               + (skipRows * rowLength + skipPixels)*2;
-            if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
-               /* no zooming */
-               GLint row;
-               ASSERT(drawWidth <= MAX_WIDTH);
-               for (row=0; row<drawHeight; row++) {
-                  GLint i;
-                  GLchan *ptr = src;
-		  for (i=0;i<drawWidth;i++) {
-                     span.array->rgba[i][0] = *ptr;
-                     span.array->rgba[i][1] = *ptr;
-                     span.array->rgba[i][2] = *ptr++;
-                     span.array->rgba[i][3] = *ptr++;
-		  }
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY,
-                             span.array->rgba, NULL);
-                  src += rowLength*2;
-                  destY++;
-               }
-            }
-            else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
-               /* upside-down */
-               GLint row;
-               ASSERT(drawWidth <= MAX_WIDTH);
-               for (row=0; row<drawHeight; row++) {
-                  GLint i;
-                  GLchan *ptr = src;
-                  for (i=0;i<drawWidth;i++) {
-                     span.array->rgba[i][0] = *ptr;
-                     span.array->rgba[i][1] = *ptr;
-                     span.array->rgba[i][2] = *ptr++;
-                     span.array->rgba[i][3] = *ptr++;
-                  }
-                  destY--;
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY,
-                             span.array->rgba, NULL);
-                  src += rowLength*2;
-               }
-            }
-            else {
-               /* with zooming */
-               GLint row;
-               ASSERT(drawWidth <= MAX_WIDTH);
-               for (row=0; row<drawHeight; row++) {
-                  GLchan *ptr = src;
-                  GLint i;
-		  for (i=0;i<drawWidth;i++) {
-                     span.array->rgba[i][0] = *ptr;
-                     span.array->rgba[i][1] = *ptr;
-                     span.array->rgba[i][2] = *ptr++;
-                     span.array->rgba[i][3] = *ptr++;
-		  }
-                  span.x = destX;
-                  span.y = destY;
-                  span.end = drawWidth;
-                  _swrast_write_zoomed_rgba_span(ctx, &span,
-                            (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
-                  src += rowLength*2;
-                  destY++;
-               }
-            }
-         }
-         return GL_TRUE;
-      }
-      else if (format==GL_COLOR_INDEX && type==GL_UNSIGNED_BYTE) {
-         GLubyte *src = (GLubyte *) pixels + skipRows * rowLength + skipPixels;
-         if (ctx->Visual.rgbMode) {
-            /* convert CI data to RGBA */
-            if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
-               /* no zooming */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  ASSERT(drawWidth <= MAX_WIDTH);
-                  _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY,
-                             span.array->rgba, NULL);
-                  src += rowLength;
-                  destY++;
-               }
-               return GL_TRUE;
-            }
-            else if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==-1.0F) {
-               /* upside-down */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  ASSERT(drawWidth <= MAX_WIDTH);
-                  _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
-                  destY--;
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY,
-                             span.array->rgba, NULL);
-                  src += rowLength;
-               }
-               return GL_TRUE;
-            }
-            else {
-               /* with zooming */
-               GLint row;
-               for (row=0; row<drawHeight; row++) {
-                  ASSERT(drawWidth <= MAX_WIDTH);
-                  _mesa_map_ci8_to_rgba(ctx, drawWidth, src, span.array->rgba);
-                  span.x = destX;
-                  span.y = destY;
-                  span.end = drawWidth;
-                  _swrast_write_zoomed_rgba_span(ctx, &span,
-                            (CONST GLchan (*)[4]) span.array->rgba, zoomY0, 0);
-                  src += rowLength;
-                  destY++;
-               }
-               return GL_TRUE;
-            }
-         }
-         else if (ctx->_ImageTransferState==0) {
-            /* write CI data to CI frame buffer */
-            GLint row;
-            if (ctx->Pixel.ZoomX==1.0F && ctx->Pixel.ZoomY==1.0F) {
-               /* no zooming */
-               for (row=0; row<drawHeight; row++) {
-                  GLuint index32[MAX_WIDTH];
-                  GLint col;
-                  for (col = 0; col < drawWidth; col++)
-                     index32[col] = src[col];
-                  rb->PutRow(ctx, rb, drawWidth, destX, destY, index32, NULL);
-                  src += rowLength;
-                  destY++;
-               }
-               return GL_TRUE;
-            }
-            else {
-               /* with zooming */
-               return GL_FALSE;
-            }
-         }
-      }
-      else {
-         /* can't handle this pixel format and/or data type here */
-         return GL_FALSE;
-      }
-   }
-
-   /* can't do a simple draw, have to use slow path */
-   return GL_FALSE;
-}
-
-
-
-/*
- * Draw color index image.
- */
-static void
-draw_index_pixels( GLcontext *ctx, GLint x, GLint y,
-                   GLsizei width, GLsizei height,
-                   GLenum type,
-                   const struct gl_pixelstore_attrib *unpack,
-                   const GLvoid *pixels )
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-   const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
-   GLint row, skipPixels;
-   struct sw_span span;
-
-   INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_INDEX);
-
-   if (ctx->Depth.Test)
-      _swrast_span_default_z(ctx, &span);
-   if (swrast->_FogEnabled)
-      _swrast_span_default_fog(ctx, &span);
-
-   /*
-    * General solution
-    */
-   skipPixels = 0;
-   while (skipPixels < width) {
-      const GLint spanX = x + (zoom ? 0 : skipPixels);
-      GLint spanY = y;
-      const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
-                          ? MAX_WIDTH : (width - skipPixels);
-      ASSERT(spanEnd <= MAX_WIDTH);
-      for (row = 0; row < height; row++, spanY++) {
-         const GLvoid *source = _mesa_image_address2d(unpack, pixels,
-                                                      width, height,
-                                                      GL_COLOR_INDEX, type,
-                                                      row, skipPixels);
-         _mesa_unpack_index_span(ctx, spanEnd, GL_UNSIGNED_INT,
-                                 span.array->index, type, source, unpack,
-                                 ctx->_ImageTransferState);
-
-         /* These may get changed during writing/clipping */
-         span.x = spanX;
-         span.y = spanY;
-         span.end = spanEnd;
-         
-         if (zoom)
-            _swrast_write_zoomed_index_span(ctx, &span, y, skipPixels);
-         else
-            _swrast_write_index_span(ctx, &span);
-      }
-      skipPixels += spanEnd;
-   }
-}
-
-
-
-/*
- * Draw stencil image.
- */
-static void
-draw_stencil_pixels( GLcontext *ctx, GLint x, GLint y,
-                     GLsizei width, GLsizei height,
-                     GLenum type,
-                     const struct gl_pixelstore_attrib *unpack,
-                     const GLvoid *pixels )
-{
-   const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
-   const GLint desty = y;
-   GLint row, skipPixels;
-
-   if (type != GL_BYTE &&
-       type != GL_UNSIGNED_BYTE &&
-       type != GL_SHORT &&
-       type != GL_UNSIGNED_SHORT &&
-       type != GL_INT &&
-       type != GL_UNSIGNED_INT &&
-       type != GL_FLOAT &&
-       type != GL_BITMAP) {
-      _mesa_error( ctx, GL_INVALID_ENUM, "glDrawPixels(stencil type)");
-      return;
-   }
-
-   if (ctx->Visual.stencilBits == 0) {
-      _mesa_error( ctx, GL_INVALID_OPERATION, "glDrawPixels(no stencil buffer)");
-      return;
-   }
-
-   /* if width > MAX_WIDTH, have to process image in chunks */
-   skipPixels = 0;
-   while (skipPixels < width) {
-      const GLint spanX = x;
-      GLint spanY = y;
-      const GLint spanWidth = (width - skipPixels > MAX_WIDTH)
-                            ? MAX_WIDTH : (width - skipPixels);
-
-      for (row = 0; row < height; row++, spanY++) {
-         GLstencil values[MAX_WIDTH];
-         GLenum destType = (sizeof(GLstencil) == sizeof(GLubyte))
-                         ? GL_UNSIGNED_BYTE : GL_UNSIGNED_SHORT;
-         const GLvoid *source = _mesa_image_address2d(unpack, pixels,
-                                                      width, height,
-                                                      GL_COLOR_INDEX, type,
-                                                      row, skipPixels);
-         _mesa_unpack_index_span(ctx, spanWidth, destType, values,
-                                 type, source, unpack,
-                                 ctx->_ImageTransferState);
-         if (ctx->_ImageTransferState & IMAGE_SHIFT_OFFSET_BIT) {
-            _mesa_shift_and_offset_stencil(ctx, spanWidth, values);
-         }
-         if (ctx->Pixel.MapStencilFlag) {
-            _mesa_map_stencil(ctx, spanWidth, values);
-         }
-
-         if (zoom) {
-            _swrast_write_zoomed_stencil_span(ctx, (GLuint) spanWidth,
-                                            spanX, spanY, values, desty, 0);
-         }
-         else {
-            _swrast_write_stencil_span(ctx, spanWidth, spanX, spanY, values);
-         }
-      }
-      skipPixels += spanWidth;
-   }
-}
-
-
-/*
- * Draw depth image.
- */
-static void
-draw_depth_pixels( GLcontext *ctx, GLint x, GLint y,
-                   GLsizei width, GLsizei height,
-                   GLenum type,
-                   const struct gl_pixelstore_attrib *unpack,
-                   const GLvoid *pixels )
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-   const GLboolean bias_or_scale = ctx->Pixel.DepthBias!=0.0 || ctx->Pixel.DepthScale!=1.0;
-   const GLboolean zoom = ctx->Pixel.ZoomX != 1.0 || ctx->Pixel.ZoomY != 1.0;
-   const GLint desty = y;
-   struct sw_span span;
-
-   INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_Z);
-
-   if (type != GL_BYTE
-       && type != GL_UNSIGNED_BYTE
-       && type != GL_SHORT
-       && type != GL_UNSIGNED_SHORT
-       && type != GL_INT
-       && type != GL_UNSIGNED_INT
-       && type != GL_FLOAT) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawPixels(type)");
-      return;
-   }
-
-   _swrast_span_default_color(ctx, &span);
-
-   if (swrast->_FogEnabled)
-      _swrast_span_default_fog(ctx, &span);
-   if (ctx->Texture._EnabledCoordUnits)
-      _swrast_span_default_texcoords(ctx, &span);
-
-   if (type == GL_UNSIGNED_SHORT
-       && ctx->Visual.depthBits == 16
-       && !bias_or_scale
-       && !zoom
-       && ctx->Visual.rgbMode
-       && width <= MAX_WIDTH) {
-      /* Special case: directly write 16-bit depth values */
-      GLint row, spanY = y;
-      for (row = 0; row < height; row++, spanY++) {
-         const GLushort *zSrc = (const GLushort *)
-            _mesa_image_address2d(unpack, pixels, width, height,
-                                  GL_DEPTH_COMPONENT, type, row, 0);
-         GLint i;
-         for (i = 0; i < width; i++)
-            span.array->z[i] = zSrc[i];
-         span.x = x;
-         span.y = spanY;
-         span.end = width;
-         _swrast_write_rgba_span(ctx, &span);
-      }
-   }
-   else if (type == GL_UNSIGNED_INT
-            && sizeof(GLdepth) == 4
-            && !bias_or_scale
-            && !zoom
-            && ctx->Visual.rgbMode
-            && width <= MAX_WIDTH) {
-      /* Special case: shift 32-bit values down to ctx->Visual.depthBits */
-      const GLint shift = 32 - ctx->Visual.depthBits;
-      GLint row, spanY = y;
-      for (row = 0; row < height; row++, spanY++) {
-         const GLuint *zSrc = (const GLuint *)
-            _mesa_image_address2d(unpack, pixels, width, height,
-                                  GL_DEPTH_COMPONENT, type, row, 0);
-         if (shift == 0) {
-            MEMCPY(span.array->z, zSrc, width * sizeof(GLdepth));
-         }
-         else {
-            GLint col;
-            for (col = 0; col < width; col++)
-               span.array->z[col] = zSrc[col] >> shift;
-         }
-         span.x = x;
-         span.y = spanY;
-         span.end = width;
-         _swrast_write_rgba_span(ctx, &span);
-      }
-   }
-   else {
-      /* General case */
-      const GLfloat depthMax = ctx->DrawBuffer->_DepthMaxF;
-      GLint row, skipPixels = 0;
-
-      /* in case width > MAX_WIDTH do the copy in chunks */
-      while (skipPixels < width) {
-         const GLint spanX = x + (zoom ? 0 : skipPixels);
-         GLint spanY = y;
-         const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
-                             ? MAX_WIDTH : (width - skipPixels);
-         ASSERT(span.end <= MAX_WIDTH);
-         for (row = 0; row < height; row++, spanY++) {
-            GLfloat floatSpan[MAX_WIDTH];
-            const GLvoid *zSrc = _mesa_image_address2d(unpack,
-                                                      pixels, width, height,
-                                                      GL_DEPTH_COMPONENT, type,
-                                                      row, skipPixels);
-
-            /* Set these for each row since the _swrast_write_* function may
-             * change them while clipping.
-             */
-            span.x = spanX;
-            span.y = spanY;
-            span.end = spanEnd;
-
-            _mesa_unpack_depth_span(ctx, span.end, floatSpan, type,
-                                    zSrc, unpack);
-            /* clamp depth values to [0,1] and convert from floats to ints */
-            {
-               GLuint i;
-               for (i = 0; i < span.end; i++) {
-                  span.array->z[i] = (GLdepth) (floatSpan[i] * depthMax);
-               }
-            }
-            if (zoom) {
-               _swrast_write_zoomed_depth_span(ctx, &span, desty, skipPixels);
-            }
-            else if (ctx->Visual.rgbMode) {
-               _swrast_write_rgba_span(ctx, &span);
-            }
-            else {
-               _swrast_write_index_span(ctx, &span);
-            }
-         }
-         skipPixels += spanEnd;
-      }
-   }
-}
-
-
-
-/*
- * Draw RGBA image.
- */
-static void
-draw_rgba_pixels( GLcontext *ctx, GLint x, GLint y,
-                  GLsizei width, GLsizei height,
-                  GLenum format, GLenum type,
-                  const struct gl_pixelstore_attrib *unpack,
-                  const GLvoid *pixels )
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-   struct gl_renderbuffer *rb = NULL; /* only used for quickDraw path */
-   const GLboolean zoom = ctx->Pixel.ZoomX!=1.0 || ctx->Pixel.ZoomY!=1.0;
-   const GLint desty = y;
-   GLboolean quickDraw;
-   GLfloat *convImage = NULL;
-   GLuint transferOps = ctx->_ImageTransferState;
-   struct sw_span span;
-
-   INIT_SPAN(span, GL_BITMAP, 0, 0, SPAN_RGBA);
-
-   if (!_mesa_is_legal_format_and_type(ctx, format, type)) {
-      _mesa_error(ctx, GL_INVALID_ENUM, "glDrawPixels(format or type)");
-      return;
-   }
-
-   /* Try an optimized glDrawPixels first */
-   if (fast_draw_pixels(ctx, x, y, width, height, format, type, unpack, pixels))
-      return;
-
-   if (ctx->Depth.Test)
-      _swrast_span_default_z(ctx, &span);
-   if (swrast->_FogEnabled)
-      _swrast_span_default_fog(ctx, &span);
-   if (ctx->Texture._EnabledCoordUnits)
-      _swrast_span_default_texcoords(ctx, &span);
-
-   if (SWRAST_CONTEXT(ctx)->_RasterMask == 0 && !zoom && x >= 0 && y >= 0
-       && x + width <= (GLint) ctx->DrawBuffer->Width
-       && y + height <= (GLint) ctx->DrawBuffer->Height
-       && ctx->DrawBuffer->_NumColorDrawBuffers[0] == 1) {
-      quickDraw = GL_TRUE;
-      rb = ctx->DrawBuffer->_ColorDrawBuffers[0][0];
-   }
-   else {
-      quickDraw = GL_FALSE;
-      rb = NULL;
-   }
-
-   if (ctx->Pixel.Convolution2DEnabled || ctx->Pixel.Separable2DEnabled) {
-      /* Convolution has to be handled specially.  We'll create an
-       * intermediate image, applying all pixel transfer operations
-       * up to convolution.  Then we'll convolve the image.  Then
-       * we'll proceed with the rest of the transfer operations and
-       * rasterize the image.
-       */
-      GLint row;
-      GLfloat *dest, *tmpImage;
-
-      tmpImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
-      if (!tmpImage) {
-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
-         return;
-      }
-      convImage = (GLfloat *) _mesa_malloc(width * height * 4 * sizeof(GLfloat));
-      if (!convImage) {
-         _mesa_free(tmpImage);
-         _mesa_error(ctx, GL_OUT_OF_MEMORY, "glDrawPixels");
-         return;
-      }
-
-      /* Unpack the image and apply transfer ops up to convolution */
-      dest = tmpImage;
-      for (row = 0; row < height; row++) {
-         const GLvoid *source = _mesa_image_address2d(unpack,
-                                  pixels, width, height, format, type, row, 0);
-         _mesa_unpack_color_span_float(ctx, width, GL_RGBA, (GLfloat *) dest,
-                                     format, type, source, unpack,
-                                     transferOps & IMAGE_PRE_CONVOLUTION_BITS);
-         dest += width * 4;
-      }
-
-      /* do convolution */
-      if (ctx->Pixel.Convolution2DEnabled) {
-         _mesa_convolve_2d_image(ctx, &width, &height, tmpImage, convImage);
-      }
-      else {
-         ASSERT(ctx->Pixel.Separable2DEnabled);
-         _mesa_convolve_sep_image(ctx, &width, &height, tmpImage, convImage);
-      }
-      _mesa_free(tmpImage);
-
-      /* continue transfer ops and draw the convolved image */
-      unpack = &ctx->DefaultPacking;
-      pixels = convImage;
-      format = GL_RGBA;
-      type = GL_FLOAT;
-      transferOps &= IMAGE_POST_CONVOLUTION_BITS;
-   }
-
-   /*
-    * General solution
-    */
-   {
-      const GLuint interpMask = span.interpMask;
-      const GLuint arrayMask = span.arrayMask;
-      GLint row, skipPixels = 0;
-
-      /* if the span is wider than MAX_WIDTH we have to do it in chunks */
-      while (skipPixels < width) {
-         const GLint spanX = x + (zoom ? 0 : skipPixels);
-         GLint spanY = y;
-         const GLint spanEnd = (width - skipPixels > MAX_WIDTH)
-                             ? MAX_WIDTH : (width - skipPixels);
-         ASSERT(span.end <= MAX_WIDTH);
-
-         for (row = 0; row < height; row++, spanY++) {
-            const GLvoid *source = _mesa_image_address2d(unpack,
-                     pixels, width, height, format, type, row, skipPixels);
-
-            /* Set these for each row since the _swrast_write_* function may
-             * change them while clipping.
-             */
-            span.x = spanX;
-            span.y = spanY;
-            span.end = spanEnd;
-            span.arrayMask = arrayMask;
-            span.interpMask = interpMask;
-
-            _mesa_unpack_color_span_chan(ctx, span.end, GL_RGBA,
-                                         (GLchan *) span.array->rgba,
-                                         format, type, source, unpack,
-                                         transferOps);
-
-            if ((ctx->Pixel.MinMaxEnabled && ctx->MinMax.Sink) ||
-                (ctx->Pixel.HistogramEnabled && ctx->Histogram.Sink))
-               continue;
-
-            if (ctx->Pixel.PixelTextureEnabled && ctx->Texture._EnabledUnits) {
-               _swrast_pixel_texture(ctx, &span);
-            }
-
-            /* draw the span */
-            if (quickDraw) {
-               rb->PutRow(ctx, rb, span.end, span.x, span.y,
-                          span.array->rgba, NULL);
-            }
-            else if (zoom) {
-               _swrast_write_zoomed_rgba_span(ctx, &span,
-                    (CONST GLchan (*)[4]) span.array->rgba, desty, skipPixels);
-            }
-            else {
-               _swrast_write_rgba_span(ctx, &span);
-            }
-         }
-
-         skipPixels += spanEnd;
-      }
-   }
-
-   if (convImage) {
-      _mesa_free(convImage);
-   }
-}
-
-
-
-/*
- * Execute glDrawPixels
- */
-void
-_swrast_DrawPixels( GLcontext *ctx,
-		    GLint x, GLint y,
-		    GLsizei width, GLsizei height,
-		    GLenum format, GLenum type,
-		    const struct gl_pixelstore_attrib *unpack,
-		    const GLvoid *pixels )
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
-   if (swrast->NewState)
-      _swrast_validate_derived( ctx );
-
-   if (unpack->BufferObj->Name) {
-      /* unpack from PBO */
-      GLubyte *buf;
-      if (!_mesa_validate_pbo_access(2, unpack, width, height, 1,
-                                     format, type, pixels)) {
-         _mesa_error(ctx, GL_INVALID_OPERATION,
-                     "glDrawPixels(invalid PBO access)");
-         return;
-      }
-      buf = (GLubyte *) ctx->Driver.MapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
-                                              GL_READ_ONLY_ARB,
-                                              unpack->BufferObj);
-      if (!buf) {
-         /* buffer is already mapped - that's an error */
-         _mesa_error(ctx, GL_INVALID_OPERATION, "glDrawPixels(PBO is mapped)");
-         return;
-      }
-      pixels = ADD_POINTERS(buf, pixels);
-   }
-
-   RENDER_START(swrast,ctx);
-
-   switch (format) {
-   case GL_STENCIL_INDEX:
-      draw_stencil_pixels( ctx, x, y, width, height, type, unpack, pixels );
-      break;
-   case GL_DEPTH_COMPONENT:
-      draw_depth_pixels( ctx, x, y, width, height, type, unpack, pixels );
-      break;
-   case GL_COLOR_INDEX:
-      if (ctx->Visual.rgbMode)
-	 draw_rgba_pixels(ctx, x,y, width, height, format, type, unpack, pixels);
-      else
-	 draw_index_pixels(ctx, x, y, width, height, type, unpack, pixels);
-      break;
-   case GL_RED:
-   case GL_GREEN:
-   case GL_BLUE:
-   case GL_ALPHA:
-   case GL_LUMINANCE:
-   case GL_LUMINANCE_ALPHA:
-   case GL_RGB:
-   case GL_BGR:
-   case GL_RGBA:
-   case GL_BGRA:
-   case GL_ABGR_EXT:
-      draw_rgba_pixels(ctx, x, y, width, height, format, type, unpack, pixels);
-      break;
-   default:
-      _mesa_error( ctx, GL_INVALID_ENUM, "glDrawPixels(format)" );
-      /* don't return yet, clean-up */
-   }
-
-   RENDER_FINISH(swrast,ctx);
-
-   if (unpack->BufferObj->Name) {
-      /* done with PBO so unmap it now */
-      ctx->Driver.UnmapBuffer(ctx, GL_PIXEL_UNPACK_BUFFER_EXT,
-                              unpack->BufferObj);
-   }
-}
-
-
-
-#if 0  /* experimental */
-/*
- * Execute glDrawDepthPixelsMESA().
- */
-void
-_swrast_DrawDepthPixelsMESA( GLcontext *ctx,
-                             GLint x, GLint y,
-                             GLsizei width, GLsizei height,
-                             GLenum colorFormat, GLenum colorType,
-                             const GLvoid *colors,
-                             GLenum depthType, const GLvoid *depths,
-                             const struct gl_pixelstore_attrib *unpack )
-{
-   SWcontext *swrast = SWRAST_CONTEXT(ctx);
-
-   if (swrast->NewState)
-      _swrast_validate_derived( ctx );
-
-   RENDER_START(swrast,ctx);
-
-   switch (colorFormat) {
-   case GL_COLOR_INDEX:
-      if (ctx->Visual.rgbMode)
-	 draw_rgba_pixels(ctx, x,y, width, height, colorFormat, colorType, unpack, colors);
-      else
-	 draw_index_pixels(ctx, x, y, width, height, colorType, unpack, colors);
-      break;
-   case GL_RED:
-   case GL_GREEN:
-   case GL_BLUE:
-   case GL_ALPHA:
-   case GL_LUMINANCE:
-   case GL_LUMINANCE_ALPHA:
-   case GL_RGB:
-   case GL_BGR:
-   case GL_RGBA:
-   case GL_BGRA:
-   case GL_ABGR_EXT:
-      draw_rgba_pixels(ctx, x, y, width, height, colorFormat, colorType, unpack, colors);
-      break;
-   default:
-      _mesa_error( ctx, GL_INVALID_ENUM,
-                   "glDrawDepthPixelsMESA(colorFormat)" );
-   }
-
-   RENDER_FINISH(swrast,ctx);
-}
-#endif