fix small s3tc mipmaps (#10968)

make sure that always whole blocks are uploaded.
(May still not work correctly if the top mip map is not at least a full block,
that is 4 pixels wide - not sure, but probably doesn't happen in real world)

1 files changed, 18 insertions, 17 deletions

diff --git a/src/mesa/drivers/dri/i915/intel_tex.c b/src/mesa/drivers/dri/i915/intel_tex.c
index 6012d3e799..46f49e74e5 100644
--- a/src/mesa/drivers/dri/i915/intel_tex.c
+++ b/src/mesa/drivers/dri/i915/intel_tex.c
@@ -634,18 +634,12 @@ static void intelUploadTexImage( intelContextPtr intel,
 			       image->Height);
    }
    else if (image->IsCompressed) {
-      GLuint row_len = image->Width * 2;
+      GLuint row_len = 0;
       GLubyte *dst = (GLubyte *)(t->BufAddr + offset);
       GLubyte *src = (GLubyte *)image->Data;
       GLuint j;
 
-      if (INTEL_DEBUG & DEBUG_TEXTURE)
-	 fprintf(stderr, 
-		 "Upload image %dx%dx%d offset %xm row_len %x "
-		 "pitch %x depth_pitch %x\n",
-		 image->Width, image->Height, image->Depth, offset,
-		 row_len, t->Pitch, t->depth_pitch);
-
+      /* must always copy whole blocks (8/16 bytes) */
       switch (image->InternalFormat) {
 	case GL_COMPRESSED_RGB_FXT1_3DFX:
 	case GL_COMPRESSED_RGBA_FXT1_3DFX:
@@ -653,24 +647,31 @@ static void intelUploadTexImage( intelContextPtr intel,
 	case GL_RGB4_S3TC:
 	case GL_COMPRESSED_RGB_S3TC_DXT1_EXT:
 	case GL_COMPRESSED_RGBA_S3TC_DXT1_EXT:
-	  for (j = 0 ; j < image->Height/4 ; j++, dst += (t->Pitch)) {
-	    __memcpy(dst, src, row_len );
-	    src += row_len;
-	  }
+	  row_len = (image->Width * 2 + 7) & ~7;
 	  break;
 	case GL_RGBA_S3TC:
 	case GL_RGBA4_S3TC:
 	case GL_COMPRESSED_RGBA_S3TC_DXT3_EXT:
-	case GL_COMPRESSED_RGBA_S3TC_DXT5_EXT:
-	  for (j = 0 ; j < image->Height/4 ; j++, dst += (t->Pitch)) {
-	    __memcpy(dst, src, (image->Width*4) );
-	    src += image->Width*4;
-	  }
+	  row_len = (image->Width * 4 + 15) & ~15;
 	  break;
 	default:
 	  fprintf(stderr,"Internal Compressed format not supported %d\n", image->InternalFormat);
 	  break;
       }
+
+      if (INTEL_DEBUG & DEBUG_TEXTURE)
+	 fprintf(stderr, 
+		 "Upload image %dx%dx%d offset %xm row_len %x "
+		 "pitch %x depth_pitch %x\n",
+		 image->Width, image->Height, image->Depth, offset,
+		 row_len, t->Pitch, t->depth_pitch);
+
+      if (row_len) {
+	 for (j = 0 ; j < (image->Height + 3)/4 ; j++, dst += (t->Pitch)) {
+	   __memcpy(dst, src, row_len );
+	   src += row_len;
+	 }
+      }
    }
    /* Time for another vtbl entry:
     */