[Mesa-dev] [PATCH] svga: fix PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE value

[Charmaine Lee]

Reviewed-by :Charmaine Lee <charmainel at vmware.com>
________________________________________
From: Brian Paul <brianp at vmware.com>
Sent: Monday, July 10, 2017 7:40 AM
To: mesa-dev at lists.freedesktop.org
Cc: Charmaine Lee; mesa-stable at lists.freedesktop.org
Subject: [PATCH] svga: fix PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE value

This query is supposed to return the max texture buffer size/width in
texels, not size in bytes.  Divide by 16 (the largest format size) to
return texels.

Fixes Piglit arb_texture_buffer_object-max-size test.

Cc: mesa-stable at lists.freedesktop.org
---
 src/gallium/drivers/svga/svga_screen.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/gallium/drivers/svga/svga_screen.c b/src/gallium/drivers/svga/svga_screen.c
index 0b63525..f40d151 100644
--- a/src/gallium/drivers/svga/svga_screen.c
+++ b/src/gallium/drivers/svga/svga_screen.c
@@ -312,7 +312,10 @@ svga_get_param(struct pipe_screen *screen, enum pipe_cap param)
       return svgascreen->ms_samples ? 1 : 0;

    case PIPE_CAP_MAX_TEXTURE_BUFFER_SIZE:
-      return SVGA3D_DX_MAX_RESOURCE_SIZE;
+      /* convert bytes to texels for the case of the largest texel
+       * size: float[4].
+       */
+      return SVGA3D_DX_MAX_RESOURCE_SIZE / (4 * sizeof(float));

    case PIPE_CAP_MIN_TEXEL_OFFSET:
       return sws->have_vgpu10 ? VGPU10_MIN_TEXEL_FETCH_OFFSET : 0;
--
1.9.1