meta: Add support for doing multisample resolves.

Note that this doesn't handle GL_EXT_multisample_scaled_blit yet.  The
i965 code for that extension bakes in knowledge of the sample positions
(well, knowledge of the sample positions aligned to a lower-resolution
grid), which we would have to do at runtime somehow for meta.

Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 7 insertions, 0 deletions

diff --git a/src/mesa/drivers/common/meta.h b/src/mesa/drivers/common/meta.h
index 822bfa13d37..5d79253139f 100644
--- a/src/mesa/drivers/common/meta.h
+++ b/src/mesa/drivers/common/meta.h
@@ -221,6 +221,12 @@ struct blit_shader_table {
    struct blit_shader sampler_cubemap_array;
 };
 
+enum blit_msaa_shader {
+   BLIT_MSAA_SHADER_2D_MULTISAMPLE,
+   BLIT_MSAA_SHADER_2D_MULTISAMPLE_DEPTH,
+   BLIT_MSAA_SHADER_COUNT,
+};
+
 /**
  * State for glBlitFramebufer()
  */
@@ -230,6 +236,7 @@ struct blit_state
    GLuint VBO;
    GLuint DepthFP;
    struct blit_shader_table shaders;
+   GLuint msaa_shaders[BLIT_MSAA_SHADER_COUNT];
    struct temp_texture depthTex;
 };