gallium: No longer allow CPU mapping surfaces directly.

Instead, a new pipe_transfer object has to be created and mapped for
transferring data between the CPU and a texture. This gives the driver more
flexibility for textures in address spaces that aren't CPU accessible.

This is a first pass; softpipe/xlib builds and runs glxgears, but it only shows
a black window. Looks like something's off related to the Z buffer, so the
depth test always fails.

1 files changed, 6 insertions, 7 deletions

diff --git a/src/mesa/state_tracker/st_atom_pixeltransfer.c b/src/mesa/state_tracker/st_atom_pixeltransfer.c
index a357b71677..ce872458e3 100644
--- a/src/mesa/state_tracker/st_atom_pixeltransfer.c
+++ b/src/mesa/state_tracker/st_atom_pixeltransfer.c
@@ -140,7 +140,7 @@ load_color_map_texture(GLcontext *ctx, struct pipe_texture *pt)
 {
    struct pipe_context *pipe = ctx->st->pipe;
    struct pipe_screen *screen = pipe->screen;
-   struct pipe_surface *surface;
+   struct pipe_transfer *transfer;
    const GLuint rSize = ctx->PixelMaps.RtoR.Size;
    const GLuint gSize = ctx->PixelMaps.GtoG.Size;
    const GLuint bSize = ctx->PixelMaps.BtoB.Size;
@@ -149,10 +149,9 @@ load_color_map_texture(GLcontext *ctx, struct pipe_texture *pt)
    uint *dest;
    uint i, j;
 
-   surface = screen->get_tex_surface(screen, pt, 0, 0, 0, 
-                                     PIPE_BUFFER_USAGE_CPU_WRITE);
-   dest = (uint *) screen->surface_map(screen, surface,
-                                       PIPE_BUFFER_USAGE_CPU_WRITE);
+   transfer = screen->get_tex_transfer(screen, pt, 0, 0, 0, PIPE_TRANSFER_WRITE,
+                                       0, 0, texSize, texSize);
+   dest = (uint *) screen->transfer_map(screen, transfer);
 
    /* Pack four 1D maps into a 2D texture:
     * R map is placed horizontally, indexed by S, in channel 0
@@ -171,8 +170,8 @@ load_color_map_texture(GLcontext *ctx, struct pipe_texture *pt)
       }
    }
 
-   screen->surface_unmap(screen, surface);
-   pipe_surface_reference(&surface, NULL);
+   screen->transfer_unmap(screen, transfer);
+   screen->tex_transfer_release(screen, &transfer);
 }