gallium: add bitmap/drawpixels texcoord bias support

The state tracker will call pipe->get_paramf(PIPE_CAP_BITMAP_TEXCOORD_BIAS)
to get a bias factor for adjusting the texcoords used in bitmap/drawpixels.
This allows us to compensate for small differences in rasterization from
one device to another.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/mesa/state_tracker/st_context.h b/src/mesa/state_tracker/st_context.h
index 2b6f8743f38..a756055898d 100644
--- a/src/mesa/state_tracker/st_context.h
+++ b/src/mesa/state_tracker/st_context.h
@@ -143,6 +143,8 @@ struct st_context
 
    GLfloat polygon_offset_scale; /* ?? */
 
+   GLfloat bitmap_texcoord_bias;
+
    /** Mapping from VERT_RESULT_x to post-transformed vertex slot */
    const GLuint *vertex_result_to_slot;