1 files changed, 34 insertions, 3 deletions

diff --git a/src/mesa/main/image.c b/src/mesa/main/image.c
index c09cd967cb2..bd38e0c3d8c 100644
--- a/src/mesa/main/image.c
+++ b/src/mesa/main/image.c
@@ -1650,7 +1650,7 @@ _mesa_apply_stencil_transfer_ops(const GLcontext *ctx, GLuint n,
       GLuint mask = ctx->PixelMaps.StoS.Size - 1;
       GLuint i;
       for (i = 0; i < n; i++) {
-         stencil[i] = ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
+         stencil[i] = (GLstencil)ctx->PixelMaps.StoS.Map[ stencil[i] & mask ];
       }
    }
 }
@@ -4161,7 +4161,7 @@ _mesa_unpack_stencil_span( const GLcontext *ctx, GLuint n,
          const GLuint mask = ctx->PixelMaps.StoS.Size - 1;
          GLuint i;
          for (i = 0; i < n; i++) {
-            indexes[i] = ctx->PixelMaps.StoS.Map[ indexes[i] & mask ];
+            indexes[i] = (GLuint)ctx->PixelMaps.StoS.Map[ indexes[i] & mask ];
          }
       }
 
@@ -4513,7 +4513,7 @@ _mesa_unpack_depth_span( const GLcontext *ctx, GLuint n,
    if (needClamp) {
       GLuint i;
       for (i = 0; i < n; i++) {
-         depthValues[i] = CLAMP(depthValues[i], 0.0, 1.0);
+         depthValues[i] = (GLfloat)CLAMP(depthValues[i], 0.0, 1.0);
       }
    }
 
@@ -5103,6 +5103,37 @@ _mesa_clip_readpixels(const GLcontext *ctx,
 
 
 /**
+ * Do clipping for a glCopyTexSubImage call.
+ * The framebuffer source region might extend outside the framebuffer
+ * bounds.  Clip the source region against the framebuffer bounds and
+ * adjust the texture/dest position and size accordingly.
+ *
+ * \return GL_FALSE if region is totally clipped, GL_TRUE otherwise.
+ */
+GLboolean
+_mesa_clip_copytexsubimage(const GLcontext *ctx,
+                           GLint *destX, GLint *destY,
+                           GLint *srcX, GLint *srcY,
+                           GLsizei *width, GLsizei *height)
+{
+   const struct gl_framebuffer *fb = ctx->ReadBuffer;
+   const GLint srcX0 = *srcX, srcY0 = *srcY;
+
+   if (_mesa_clip_to_region(0, 0, fb->Width, fb->Height,
+                            srcX, srcY, width, height)) {
+      *destX = *destX + *srcX - srcX0;
+      *destY = *destY + *srcY - srcY0;
+
+      return GL_TRUE;
+   }
+   else {
+      return GL_FALSE;
+   }
+}
+
+
+
+/**
  * Clip the rectangle defined by (x, y, width, height) against the bounds
  * specified by [xmin, xmax) and [ymin, ymax).
  * \return GL_FALSE if rect is totally clipped, GL_TRUE otherwise.