Previously, if TEXTURE_IMMUTABLE_FORMAT was TRUE, the levels were allowed to
be set like usual, but ARB_texture_storage states:
> 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
Signed-off-by: Corey Richardson <co...@octayn.net>
---
src/mesa/main/texparam.c | 28 ++++++++++++++++++++++++++--
1 file changed, 26 insertions(+), 2 deletions(-)
diff --git a/src/mesa/main/texparam.c b/src/mesa/main/texparam.c
index 141cbe3..f07d755 100644
--- a/src/mesa/main/texparam.c
+++ b/src/mesa/main/texparam.c
@@ -386,7 +386,14 @@ set_tex_parameteri(struct gl_context *ctx,
return GL_FALSE;
}
incomplete(ctx, texObj);
- texObj->BaseLevel = params[0];
+
+ /** See note about ARB_texture_storage below */
+ if (texObj->Immutable)
+ texObj->BaseLevel = (params[0] >= texObj->ImmutableLevels) ?
+ texObj->ImmutableLevels - 1 : params[0];
+ else
+ texObj->BaseLevel = params[0];
+
return GL_TRUE;
case GL_TEXTURE_MAX_LEVEL:
@@ -399,7 +406,24 @@ set_tex_parameteri(struct gl_context *ctx,
return GL_FALSE;
}
incomplete(ctx, texObj);
- texObj->MaxLevel = params[0];
+
+ /** 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) {
+ if (*params < texObj->BaseLevel)
+ texObj->MaxLevel = texObj->BaseLevel;
+ else if (*params >= texObj->ImmutableLevels)
+ texObj->MaxLevel = texObj->ImmutableLevels - 1;
+ else
+ texObj->MaxLevel = params[0];
+ }
+ else
+ texObj->MaxLevel = params[0];
+
return GL_TRUE;
case GL_GENERATE_MIPMAP_SGIS:
--
1.8.3.4
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