[Mesa-dev] [PATCH 38/41] i965: Implement the actual tables for texture alignment units.
Chad Versace
chad.versace at linux.intel.com
Thu Nov 17 19:59:05 PST 2011
From: Kenneth Graunke <kenneth at whitecape.org>
I implemented functions for horizontal/vertical alignment units separately
because I find it easier to read that way...especially with all the
corner-cases.
[chad] Cherry picked from
commit 9babf8ae308223e70f7c867076a5d62f2cd70a32
branch valign
git://git.freedesktop.org/~kayden/mesa.git
[chad] Corrected the vertical alignment calculation by checking for
depthstencil formats.
Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
Signed-off-by: Chad Versace <chad.versace at linux.intel.com>
---
src/mesa/drivers/dri/intel/intel_mipmap_tree.c | 3 +-
src/mesa/drivers/dri/intel/intel_tex_layout.c | 101 +++++++++++++++++++++++-
src/mesa/drivers/dri/intel/intel_tex_layout.h | 7 +-
3 files changed, 105 insertions(+), 6 deletions(-)
diff --git a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
index 17cf50e..af5d393 100644
--- a/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/intel/intel_mipmap_tree.c
@@ -89,7 +89,8 @@ intel_miptree_create_internal(struct intel_context *intel,
mt->compressed = compress_byte ? 1 : 0;
mt->refcount = 1;
- intel_get_texture_alignment_unit(format, &mt->align_w, &mt->align_h);
+ intel_get_texture_alignment_unit(intel, format,
+ &mt->align_w, &mt->align_h);
if (target == GL_TEXTURE_CUBE_MAP) {
assert(depth0 == 1);
diff --git a/src/mesa/drivers/dri/intel/intel_tex_layout.c b/src/mesa/drivers/dri/intel/intel_tex_layout.c
index a428d56..8119d30 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_layout.c
+++ b/src/mesa/drivers/dri/intel/intel_tex_layout.c
@@ -33,10 +33,105 @@
#include "intel_mipmap_tree.h"
#include "intel_tex_layout.h"
#include "intel_context.h"
+
+#include "main/image.h"
#include "main/macros.h"
+static unsigned int
+intel_horizontal_texture_alignment_unit(struct intel_context *intel,
+ gl_format format)
+{
+ /**
+ * From the "Alignment Unit Size" section of various specs, namely:
+ * - Gen3 Spec: "Memory Data Formats" Volume, Section 1.20.1.4
+ * - i965 and G45 PRMs: Volume 1, Section 6.17.3.4.
+ * - Ironlake and Sandybridge PRMs: Volume 1, Part 1, Section 7.18.3.4
+ * - BSpec (for Ivybridge and slight variations in separate stencil)
+ *
+ * +----------------------------------------------------------------------+
+ * | | alignment unit height ("i") |
+ * | Surface Property |-----------------------------|
+ * | | 915 | 965 | ILK | SNB | IVB |
+ * +----------------------------------------------------------------------+
+ * | YUV 4:2:2 format | 8 | 4 | 4 | 4 | 4 |
+ * | BC1-5 compressed format (DXTn/S3TC) | 4 | 4 | 4 | 4 | 4 |
+ * | FXT1 compressed format | 8 | 8 | 8 | 8 | 8 |
+ * | Depth Buffer (16-bit) | 4 | 4 | 4 | 4 | 8 |
+ * | Depth Buffer (other) | 4 | 4 | 4 | 4 | 4 |
+ * | Separate Stencil Buffer | N/A | N/A | 8 | 8 | 8 |
+ * | All Others | 4 | 4 | 4 | 4 | 4 |
+ * +----------------------------------------------------------------------+
+ *
+ * On IVB+, non-special cases can be overridden by setting the SURFACE_STATE
+ * "Surface Horizontal Alignment" field to VALIGN_4 or VALIGN_8.
+ */
+ if (_mesa_is_format_compressed(format)) {
+ /* The hardware alignment requirements for compressed textures
+ * happen to match the block boundaries.
+ */
+ unsigned int i, j;
+ _mesa_get_format_block_size(format, &i, &j);
+ return i;
+ }
+
+ if (format == MESA_FORMAT_S8)
+ return 8;
+
+ if (intel->gen >= 7 && format == MESA_FORMAT_Z16)
+ return 8;
+
+ return 4;
+}
+
+static unsigned int
+intel_vertical_texture_alignment_unit(struct intel_context *intel,
+ gl_format format)
+{
+ /**
+ * From the "Alignment Unit Size" section of various specs, namely:
+ * - Gen3 Spec: "Memory Data Formats" Volume, Section 1.20.1.4
+ * - i965 and G45 PRMs: Volume 1, Section 6.17.3.4.
+ * - Ironlake and Sandybridge PRMs: Volume 1, Part 1, Section 7.18.3.4
+ * - BSpec (for Ivybridge and slight variations in separate stencil)
+ *
+ * +----------------------------------------------------------------------+
+ * | | alignment unit height ("j") |
+ * | Surface Property |-----------------------------|
+ * | | 915 | 965 | ILK | SNB | IVB |
+ * +----------------------------------------------------------------------+
+ * | BC1-5 compressed format (DXTn/S3TC) | 4 | 4 | 4 | 4 | 4 |
+ * | FXT1 compressed format | 4 | 4 | 4 | 4 | 4 |
+ * | Depth Buffer | 2 | 2 | 2 | 4 | 4 |
+ * | Separate Stencil Buffer | N/A | N/A | 4 | 4 | 8 |
+ * | Multisampled (4x or 8x) render target | N/A | N/A | N/A | 4 | 4 |
+ * | All Others | 2 | 2 | 2 | 2 | 2 |
+ * +----------------------------------------------------------------------+
+ *
+ * On SNB+, non-special cases can be overridden by setting the SURFACE_STATE
+ * "Surface Vertical Alignment" field to VALIGN_2 or VALIGN_4.
+ *
+ * We currently don't support multisampling.
+ */
+ if (_mesa_is_format_compressed(format))
+ return 4;
+
+ if (format == MESA_FORMAT_S8)
+ return intel->gen >= 7 ? 8 : 4;
+
+ GLenum base_format = _mesa_get_format_base_format(format);
+
+ if (intel->gen >= 6 &&
+ (_mesa_is_depth_format(base_format) ||
+ _mesa_is_depthstencil_format(base_format))) {
+ return 4;
+ }
+
+ return 2;
+}
+
void
-intel_get_texture_alignment_unit(gl_format format,
+intel_get_texture_alignment_unit(struct intel_context *intel,
+ gl_format format,
unsigned int *w, unsigned int *h)
{
if (_mesa_is_format_compressed(format)) {
@@ -45,8 +140,8 @@ intel_get_texture_alignment_unit(gl_format format,
*/
_mesa_get_format_block_size(format, w, h);
} else {
- *w = 4;
- *h = 2;
+ *w = intel_horizontal_texture_alignment_unit(intel, format);
+ *h = intel_vertical_texture_alignment_unit(intel, format);
}
}
diff --git a/src/mesa/drivers/dri/intel/intel_tex_layout.h b/src/mesa/drivers/dri/intel/intel_tex_layout.h
index c6c865d..12ed16d 100644
--- a/src/mesa/drivers/dri/intel/intel_tex_layout.h
+++ b/src/mesa/drivers/dri/intel/intel_tex_layout.h
@@ -39,5 +39,8 @@ static INLINE GLuint minify( GLuint d )
}
extern void i945_miptree_layout_2d(struct intel_mipmap_tree *mt);
-void intel_get_texture_alignment_unit(gl_format format,
- unsigned int *w, unsigned int *h);
+
+void
+intel_get_texture_alignment_unit(struct intel_context *intel,
+ gl_format format,
+ unsigned int *w, unsigned int *h);
--
1.7.7.1
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