From: Neil Roberts <neil@linux.intel.com>
Date: Thu, 19 Nov 2015 14:06:08 +0000 (+0100)
Subject: i965: Check base format to determine whether to use tiled memcpy
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=3f10774cbab1e803f8aa3d6d24f8f6f98b8128c3;p=mesa.git

i965: Check base format to determine whether to use tiled memcpy

The tiled memcpy doesn't work for copying from RGBX to RGBA because it
doesn't override the alpha component to 1.0. Commit 2cebaac479d4 added
a check to disable it for RGBX formats by looking at the TexFormat.
However a lot of the rest of the code base is written with the
assumption that an RGBA texture can be used internally to implement a
GL_RGB texture. If that is done then this check breaks. This patch
makes it instead check the base format of the texture which I think
more directly matches the intention.

Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
---

diff --git a/src/mesa/drivers/dri/i965/intel_pixel_read.c b/src/mesa/drivers/dri/i965/intel_pixel_read.c
index 347f88077ea..10d14623fe1 100644
--- a/src/mesa/drivers/dri/i965/intel_pixel_read.c
+++ b/src/mesa/drivers/dri/i965/intel_pixel_read.c
@@ -134,10 +134,11 @@ intel_readpixels_tiled_memcpy(struct gl_context * ctx,
       return false;
 
    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
-    * function doesn't set the last channel to 1.
+    * function doesn't set the last channel to 1. Note this checks BaseFormat
+    * rather than TexFormat in case the RGBX format is being simulated with an
+    * RGBA format.
     */
-   if (rb->Format == MESA_FORMAT_B8G8R8X8_UNORM ||
-       rb->Format == MESA_FORMAT_R8G8B8X8_UNORM)
+   if (rb->_BaseFormat == GL_RGB)
       return false;
 
    if (!intel_get_memcpy(rb->Format, format, type, &mem_copy, &cpp,
diff --git a/src/mesa/drivers/dri/i965/intel_tex_image.c b/src/mesa/drivers/dri/i965/intel_tex_image.c
index 393ab48d9f7..5d32a4ce650 100644
--- a/src/mesa/drivers/dri/i965/intel_tex_image.c
+++ b/src/mesa/drivers/dri/i965/intel_tex_image.c
@@ -398,10 +398,11 @@ intel_gettexsubimage_tiled_memcpy(struct gl_context *ctx,
       return false;
 
    /* We can't handle copying from RGBX or BGRX because the tiled_memcpy
-    * function doesn't set the last channel to 1.
+    * function doesn't set the last channel to 1. Note this checks BaseFormat
+    * rather than TexFormat in case the RGBX format is being simulated with an
+    * RGBA format.
     */
-   if (texImage->TexFormat == MESA_FORMAT_B8G8R8X8_UNORM ||
-       texImage->TexFormat == MESA_FORMAT_R8G8B8X8_UNORM)
+   if (texImage->_BaseFormat == GL_RGB)
       return false;
 
    if (!intel_get_memcpy(texImage->TexFormat, format, type, &mem_copy, &cpp,