1 files changed, 23 insertions, 6 deletions

diff --git a/src/mesa/state_tracker/st_cb_drawpixels.c b/src/mesa/state_tracker/st_cb_drawpixels.c
index c609435a15..5f23e8afed 100644
--- a/src/mesa/state_tracker/st_cb_drawpixels.c
+++ b/src/mesa/state_tracker/st_cb_drawpixels.c
@@ -405,7 +405,7 @@ make_texture(struct st_context *st,
 
 /**
  * Draw quad with texcoords and optional color.
- * Coords are window coords with y=0=bottom.
+ * Coords are gallium window coords with y=0=top.
  * \param color  may be null
  * \param invertTex  if true, flip texcoords vertically
  */
@@ -595,10 +595,15 @@ draw_textured_quad(GLcontext *ctx, GLint x, GLint y, GLfloat z,
       pipe->set_fragment_sampler_textures(pipe, 1, &pt);
    }
 
-   /* Compute window coords (y=0=bottom) with pixel zoom.
+   /* Compute Gallium window coords (y=0=top) with pixel zoom.
     * Recall that these coords are transformed by the current
     * vertex shader and viewport transformation.
     */
+   if (st_fb_orientation(ctx->DrawBuffer) == Y_0_BOTTOM) {
+      y = ctx->DrawBuffer->Height - (int) (y + height * ctx->Pixel.ZoomY);
+      invertTex = !invertTex;
+   }
+
    x0 = (GLfloat) x;
    x1 = x + width * ctx->Pixel.ZoomX;
    y0 = (GLfloat) y;
@@ -936,6 +941,7 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
    GLfloat *color;
    enum pipe_format srcFormat, texFormat;
    int ptw, pth;
+   GLboolean invertTex = GL_FALSE;
 
    pipe->flush(pipe, PIPE_FLUSH_RENDER_CACHE, NULL);
 
@@ -1011,8 +1017,8 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
       }
    }
 
-   if (st_fb_orientation(ctx->DrawBuffer) == Y_0_TOP) {
-      srcy = ctx->DrawBuffer->Height - srcy - height;
+   if (st_fb_orientation(ctx->ReadBuffer) == Y_0_TOP) {
+      srcy = ctx->ReadBuffer->Height - srcy - height;
 
       if (srcy < 0) {
          height -= -srcy;
@@ -1021,6 +1027,8 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
 
       if (height < 0)
          return;
+
+      invertTex = !invertTex;
    }
 
    /* Need to use POT texture? */
@@ -1050,7 +1058,9 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
    if (!pt)
       return;
 
-
+   /* Make temporary texture which is a copy of the src region.
+    * We'll draw a quad with this texture to draw the dest image.
+    */
    if (srcFormat == texFormat) {
       /* copy source framebuffer surface into mipmap/texture */
       struct pipe_surface *psRead = screen->get_tex_surface(screen,
@@ -1071,6 +1081,13 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
                            psRead,
                            srcx, srcy, width, height);
       }
+
+      if (0) {
+         /* debug */
+         debug_dump_surface("copypixsrcsurf", psRead);
+         debug_dump_surface("copypixtemptex", psTex);
+      }
+
       pipe_surface_reference(&psRead, NULL); 
       pipe_surface_reference(&psTex, NULL);
    }
@@ -1121,7 +1138,7 @@ st_CopyPixels(GLcontext *ctx, GLint srcx, GLint srcy,
                       pt, 
                       driver_vp, 
                       driver_fp,
-                      color, GL_TRUE);
+                      color, invertTex);
 
    pipe_texture_reference(&pt, NULL);
 }