i965/blorp: Refactor sRGB encoding/decoding.

Because the rules for sRGB are so insane, we change brw_blorp_miptrees
to take decode_srgb and encode_srgb flags, which control linearization
of the source and destination separately.

This should make it easy to implement whatever crazy combination of
rules people throw at us.  For now, it should be equivalent.

Signed-off-by: Kenneth Graunke <[email protected]>
Reviewed-by: Topi Pohjolainen <[email protected]>

4 files changed, 23 insertions, 11 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_blorp.cpp b/src/mesa/drivers/dri/i965/brw_blorp.cpp
index 4497eab3bf0..38a32361f0b 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp.cpp
+++ b/src/mesa/drivers/dri/i965/brw_blorp.cpp
@@ -115,12 +115,11 @@ brw_blorp_surface_info::set(struct brw_context *brw,
       this->brw_surfaceformat = BRW_SURFACEFORMAT_R16_UNORM;
       break;
    default: {
-      mesa_format linear_format = _mesa_get_srgb_format_linear(format);
       if (is_render_target) {
-         assert(brw->format_supported_as_render_target[linear_format]);
-         this->brw_surfaceformat = brw->render_target_format[linear_format];
+         assert(brw->format_supported_as_render_target[format]);
+         this->brw_surfaceformat = brw->render_target_format[format];
       } else {
-         this->brw_surfaceformat = brw_format_for_mesa_format(linear_format);
+         this->brw_surfaceformat = brw_format_for_mesa_format(format);
       }
       break;
    }
diff --git a/src/mesa/drivers/dri/i965/brw_blorp.h b/src/mesa/drivers/dri/i965/brw_blorp.h
index a04a1dfa719..f04e1969351 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp.h
+++ b/src/mesa/drivers/dri/i965/brw_blorp.h
@@ -46,7 +46,8 @@ brw_blorp_blit_miptrees(struct brw_context *brw,
                         float src_x1, float src_y1,
                         float dst_x0, float dst_y0,
                         float dst_x1, float dst_y1,
-                        GLenum filter, bool mirror_x, bool mirror_y);
+                        GLenum filter, bool mirror_x, bool mirror_y,
+                        bool decode_srgb, bool encode_srgb);
 
 #ifdef __cplusplus
 } /* end extern "C" */
diff --git a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
index 05fff91ed57..df5d7ace775 100644
--- a/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
+++ b/src/mesa/drivers/dri/i965/brw_blorp_blit.cpp
@@ -63,7 +63,8 @@ brw_blorp_blit_miptrees(struct brw_context *brw,
                         float src_x1, float src_y1,
                         float dst_x0, float dst_y0,
                         float dst_x1, float dst_y1,
-                        GLenum filter, bool mirror_x, bool mirror_y)
+                        GLenum filter, bool mirror_x, bool mirror_y,
+                        bool decode_srgb, bool encode_srgb)
 {
    /* Get ready to blit.  This includes depth resolving the src and dst
     * buffers if necessary.  Note: it's not necessary to do a color resolve on
@@ -89,6 +90,12 @@ brw_blorp_blit_miptrees(struct brw_context *brw,
        dst_level, dst_layer, dst_x0, dst_y0, dst_x1, dst_y1,
        mirror_x, mirror_y);
 
+   if (!decode_srgb && _mesa_get_format_color_encoding(src_format) == GL_SRGB)
+      src_format = _mesa_get_srgb_format_linear(src_format);
+
+   if (!encode_srgb && _mesa_get_format_color_encoding(dst_format) == GL_SRGB)
+      dst_format = _mesa_get_srgb_format_linear(dst_format);
+
    brw_blorp_blit_params params(brw,
                                 src_mt, src_level, src_layer, src_format,
                                 dst_mt, dst_level, dst_layer, dst_format,
@@ -122,7 +129,8 @@ do_blorp_blit(struct brw_context *brw, GLbitfield buffer_bit,
                            dst_format,
                            srcX0, srcY0, srcX1, srcY1,
                            dstX0, dstY0, dstX1, dstY1,
-                           filter, mirror_x, mirror_y);
+                           filter, mirror_x, mirror_y,
+                           false, false);
 
    dst_irb->need_downsample = true;
 }
@@ -289,7 +297,8 @@ brw_blorp_copytexsubimage(struct brw_context *brw,
                            dst_image->TexFormat,
                            srcX0, srcY0, srcX1, srcY1,
                            dstX0, dstY0, dstX1, dstY1,
-                           GL_NEAREST, false, mirror_y);
+                           GL_NEAREST, false, mirror_y,
+                           false, false);
 
    /* If we're copying to a packed depth stencil texture and the source
     * framebuffer has separate stencil, we need to also copy the stencil data
@@ -314,7 +323,8 @@ brw_blorp_copytexsubimage(struct brw_context *brw,
                                  dst_mt->format,
                                  srcX0, srcY0, srcX1, srcY1,
                                  dstX0, dstY0, dstX1, dstY1,
-                                 GL_NEAREST, false, mirror_y);
+                                 GL_NEAREST, false, mirror_y,
+                                 false, false);
       }
    }
 
diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 6c233d84df9..9e84abb8d9f 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -2172,7 +2172,8 @@ intel_miptree_updownsample(struct brw_context *brw,
                               src->logical_width0, src->logical_height0,
                               0, 0,
                               dst->logical_width0, dst->logical_height0,
-                              GL_NEAREST, false, false /*mirror x, y*/);
+                              GL_NEAREST, false, false /*mirror x, y*/,
+                              false, false);
    } else if (src->format == MESA_FORMAT_S_UINT8) {
       brw_meta_stencil_updownsample(brw, src, dst);
    } else {
@@ -2194,7 +2195,8 @@ intel_miptree_updownsample(struct brw_context *brw,
                               src->logical_width0, src->logical_height0,
                               0, 0,
                               dst->logical_width0, dst->logical_height0,
-                              GL_NEAREST, false, false /*mirror x, y*/);
+                              GL_NEAREST, false, false /*mirror x, y*/,
+                              false, false /* decode/encode srgb */);
    }
 }