1 files changed, 15 insertions, 18 deletions

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index 52c4999e16..c205b4b766 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -849,7 +849,7 @@ _mesa_unpack_bitmap( GLint width, GLint height, const GLubyte *pixels,
          return NULL;
       }
 
-      if (packing->SkipPixels == 0) {
+      if ((packing->SkipPixels & 7) == 0) {
          _mesa_memcpy( dst, src, width_in_bytes );
          if (packing->LsbFirst) {
             flip_bytes( dst, width_in_bytes );
@@ -941,7 +941,7 @@ _mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
       if (!dst)
          return;
 
-      if (packing->SkipPixels == 0) {
+      if ((packing->SkipPixels & 7) == 0) {
          _mesa_memcpy( dst, src, width_in_bytes );
          if (packing->LsbFirst) {
             flip_bytes( dst, width_in_bytes );
@@ -960,20 +960,20 @@ _mesa_pack_bitmap( GLint width, GLint height, const GLubyte *source,
                if (*s & srcMask) {
                   *d |= dstMask;
                }
-               if (srcMask == 128) {
-                  srcMask = 1;
+               if (srcMask == 1) {
+                  srcMask = 128;
                   s++;
                }
                else {
-                  srcMask = srcMask << 1;
+                  srcMask = srcMask >> 1;
                }
-               if (dstMask == 1) {
-                  dstMask = 128;
+               if (dstMask == 128) {
+                  dstMask = 1;
                   d++;
                   *d = 0;
                }
                else {
-                  dstMask = dstMask >> 1;
+                  dstMask = dstMask << 1;
                }
             }
          }
@@ -1689,7 +1689,7 @@ _mesa_pack_rgba_span_float(GLcontext *ctx, GLuint n, GLfloat rgba[][4],
 
    if (dstFormat == GL_LUMINANCE || dstFormat == GL_LUMINANCE_ALPHA) {
       /* compute luminance values */
-      if (dstType != GL_FLOAT || ctx->Color.ClampReadColor == GL_TRUE) {
+      if (transferOps & IMAGE_CLAMP_BIT) {
          for (i = 0; i < n; i++) {
             GLfloat sum = rgba[i][RCOMP] + rgba[i][GCOMP] + rgba[i][BCOMP];
             luminance[i] = CLAMP(sum, 0.0F, 1.0F);
@@ -4214,7 +4214,7 @@ _mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
 
    switch (dstType) {
    case GL_UNSIGNED_BYTE:
-      if (sizeof(GLstencil) == 8) {
+      if (sizeof(GLstencil) == 1) {
          _mesa_memcpy( dest, source, n );
       }
       else {
@@ -4226,14 +4226,11 @@ _mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
       }
       break;
    case GL_BYTE:
-      if (sizeof(GLstencil) == 8) {
-         _mesa_memcpy( dest, source, n );
-      }
-      else {
+      {
          GLbyte *dst = (GLbyte *) dest;
          GLuint i;
          for (i=0;i<n;i++) {
-            dst[i] = (GLbyte) source[i];
+            dst[i] = (GLbyte) (source[i] & 0x7f);
          }
       }
       break;
@@ -4278,7 +4275,7 @@ _mesa_pack_stencil_span( const GLcontext *ctx, GLuint n,
          GLint *dst = (GLint *) dest;
          GLuint i;
          for (i=0;i<n;i++) {
-            *dst++ = (GLint) source[i];
+            dst[i] = (GLint) source[i];
          }
          if (dstPacking->SwapBytes) {
             _mesa_swap4( (GLuint *) dst, n );
@@ -5155,7 +5152,7 @@ _mesa_clip_to_region(GLint xmin, GLint ymin,
 
    /* right clipping */
    if (*x + *width > xmax)
-      *width -= (*x + *width - xmax - 1);
+      *width -= (*x + *width - xmax);
 
    if (*width <= 0)
       return GL_FALSE;
@@ -5168,7 +5165,7 @@ _mesa_clip_to_region(GLint xmin, GLint ymin,
 
    /* top (or bottom) clipping */
    if (*y + *height > ymax)
-      *height -= (*y + *height - ymax - 1);
+      *height -= (*y + *height - ymax);
 
    if (*height <= 0)
       return GL_FALSE;