r600g: fix depth-stencil on evergreen

Such that it actually works in apps which use both.

A separate buffer is allocated for stencil. The only exception is
the window-system-provided depth-stencil buffer, where depth and stencil
share the same buffer.

This fixes:
- fbo-depthstencil-GL_DEPTH24_STENCIL8-clear
- fbo-depthstencil-GL_DEPTH24_STENCIL8-drawpixels-FLOAT-and-USHORT
- fbo-depthstencil-GL_DEPTH24_STENCIL8-readpixels-24_8
- fbo-depthstencil-GL_DEPTH24_STENCIL8-readpixels-FLOAT-and-USHORT

1 files changed, 7 insertions, 0 deletions

diff --git a/src/gallium/drivers/r600/r600_resource.h b/src/gallium/drivers/r600/r600_resource.h
index 836e7491f1f..d9d29db7968 100644
--- a/src/gallium/drivers/r600/r600_resource.h
+++ b/src/gallium/drivers/r600/r600_resource.h
@@ -52,6 +52,12 @@ struct r600_resource {
 
 struct r600_resource_texture {
 	struct r600_resource		resource;
+
+	/* If this resource is a depth-stencil buffer on evergreen, this contains
+	 * the depth part of the format. There is a separate stencil resource
+	 * for the stencil buffer below. */
+	enum pipe_format		real_format;
+
 	unsigned			offset[PIPE_MAX_TEXTURE_LEVELS];
 	unsigned			pitch_in_bytes[PIPE_MAX_TEXTURE_LEVELS];  /* transfer */
 	unsigned			pitch_in_blocks[PIPE_MAX_TEXTURE_LEVELS]; /* texture resource */
@@ -62,6 +68,7 @@ struct r600_resource_texture {
 	unsigned			tile_type;
 	unsigned			depth;
 	unsigned			dirty_db;
+	struct r600_resource_texture    *stencil; /* Stencil is in a separate buffer on Evergreen. */
 	struct r600_resource_texture	*flushed_depth_texture;
 	boolean				is_flushing_texture;