Hey Chris:
I think the texture level used should be clamped when using immutable
texture so if
the MAX_LEVEL is out of range it shouldn't matter. Also an unset
BASE_LEVEL should default to 0
which is relative to the view.
From arb_texture_storage:
"
Redefine level_base, level_max to be clamped forms of
TEXTURE_BASE_LEVEL/TEXTURE_MAX_LEVEL when using immutable
textures
"
Which appears to be implemented here in Mesa code:
/** From ARB_texture_storage:
* However, if TEXTURE_IMMUTABLE_FORMAT is TRUE, then level_base is
* clamped to the range [0, <levels> - 1] and level_max is then clamped to
* the range [level_base, <levels> - 1], where <levels> is the parameter
* passed the call to TexStorage* for the texture object.
*/
if (texObj->Immutable)
texObj->MaxLevel = CLAMP(params[0], texObj->BaseLevel,
texObj->ImmutableLevels - 1);
else
texObj->MaxLevel = params[0];
Jon
On 01/11/2014 05:39 PM, Chris Forbes wrote:
The test expects us to be sampling from the smallest miplevel accessible
in the view, but the TEXTURE_MAX_LEVEL constraint was out of range,
and TEXTURE_BASE_LEVEL wasn't set at all.
This would have been masked previously because the test fell over due to
use of legacy features in the core profile.
Signed-off-by: Chris Forbes <[email protected]>
---
tests/spec/arb_texture_view/rendering_levels.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/tests/spec/arb_texture_view/rendering_levels.c
b/tests/spec/arb_texture_view/rendering_levels.c
index 7f02613..ef29f78 100644
--- a/tests/spec/arb_texture_view/rendering_levels.c
+++ b/tests/spec/arb_texture_view/rendering_levels.c
@@ -94,7 +94,8 @@ test_render_levels(void)
glTextureView(new_tex, GL_TEXTURE_2D, tex, GL_RGBA8, l,
numLevels[l], 0, 1);
glBindTexture(GL_TEXTURE_2D, new_tex);
- glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, levels-1);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL,
numLevels[l] - 1);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL,
numLevels[l] - 1);
glClear(GL_COLOR_BUFFER_BIT);
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