[Fix] (MG_Impl): report a buffer texture as the wrong object, not the wrong token

glGetTextureParameter* resolve the texture by name and then hand the work to the
target-based getter, which validates the target it was given. For a buffer texture that
is GL_TEXTURE_BUFFER, and the target form correctly calls that an unaccepted token -
INVALID_ENUM.

By name there is no token to blame. The application named an object that carries none of
the sampler or level state the query reports, which is INVALID_OPERATION (GL 4.6 core
8.11). The four by-name getters check the resolved object before delegating, so the error
describes what the caller actually got wrong.

Fixes direct_state_access.textures_parameter_errors on both backends, taking the group to
74.93% on Espryt and 73.32% on Magma.

MobileGL/MG_Impl/GLImpl/Texture/GL_Texture.cpp

@@ -3793,23 +3793,43 @@ namespace MobileGL::MG_Impl::GLImpl {
         GetTextureImage(texture, level, format, type, bufSize, pixels);
     }
 
+    // A buffer texture carries none of the sampler or level state these queries report. Reached by
+    // name there is no target token to blame, so the wrong object is INVALID_OPERATION rather than
+    // the INVALID_ENUM the target forms report for an unaccepted target (GL 4.6 core 8.11).
+    static Bool ValidateNamedTextureHasParameters(const SharedPtr<MG_State::GLState::ITextureObject>& textureObject,
+                                                  const char* caller) {
+        if (!textureObject) return false;
+        if (textureObject->GetStorageType() == TextureStorageType::Buffer) {
+            MG_State::pGLContext->RecordError(
+                ErrorCode::InvalidOperation,
+                MakeUnique<GenericErrorInfo>("MG_Impl/GLImpl", caller,
+                                             "The effective target of `texture` has no texture parameters."));
+            return false;
+        }
+        return true;
+    }
+
     void GetTextureParameteriv(GLuint texture, GLenum pname, GLint* params) {
         auto textureObject = GetTextureObjectByName(texture, __func__);
+        if (!ValidateNamedTextureHasParameters(textureObject, __func__)) return;
         WithTemporarilyBoundNamedTexture(textureObject, [&](GLenum target) { GetTexParameteriv_State(target, pname, params); });
     }
 
     void GetTextureParameterfv(GLuint texture, GLenum pname, GLfloat* params) {
         auto textureObject = GetTextureObjectByName(texture, __func__);
+        if (!ValidateNamedTextureHasParameters(textureObject, __func__)) return;
         WithTemporarilyBoundNamedTexture(textureObject, [&](GLenum target) { GetTexParameterfv_State(target, pname, params); });
     }
 
     void GetTextureParameterIiv(GLuint texture, GLenum pname, GLint* params) {
         auto textureObject = GetTextureObjectByName(texture, __func__);
+        if (!ValidateNamedTextureHasParameters(textureObject, __func__)) return;
         WithTemporarilyBoundNamedTexture(textureObject, [&](GLenum target) { GetTexParameterIiv_State(target, pname, params); });
     }
 
     void GetTextureParameterIuiv(GLuint texture, GLenum pname, GLuint* params) {
         auto textureObject = GetTextureObjectByName(texture, __func__);
+        if (!ValidateNamedTextureHasParameters(textureObject, __func__)) return;
         WithTemporarilyBoundNamedTexture(textureObject, [&](GLenum target) { GetTexParameterIuiv_State(target, pname, params); });
     }
 

tools/cts/README.md

@@ -77,8 +77,8 @@ mustpass list, lavapipe / Mesa 25.2.8, `--deqp-surface-type=fbo`.
 
 | backend | conformance | strict Pass | Fail | InternalError | Crash |
 | --- | ---: | ---: | ---: | ---: | ---: |
-| DirectGLES | **74.66%** | 67.12% | 86 | 8 | 0 |
-| DirectVulkan | **73.05%** | 72.78% | 89 | 8 | 3 |
+| DirectGLES | **74.93%** | 67.39% | 85 | 8 | 0 |
+| DirectVulkan | **73.32%** | 73.05% | 88 | 8 | 3 |
 
 `textures_storage_multisample_*` is 54 of what remains on either backend and
 needs a feature rather than a fix: a multisample texture has to be attachable to

tools/cts/skills/linux-gl-cts-on-mobilegl/SKILL.md

@@ -147,8 +147,8 @@ mustpass list, Mesa 25.2.8, `--deqp-surface-type=fbo`.
 
 | backend | renderer | conformance | strict Pass | Fail | InternalError | Crash |
 | --- | --- | ---: | ---: | ---: | ---: | ---: |
-| DirectGLES | Espryt | **74.66%** | 67.12% | 86 | 8 | 0 |
-| DirectVulkan | Magma | **73.05%** | 72.78% | 89 | 8 | 3 |
+| DirectGLES | Espryt | **74.93%** | 67.39% | 85 | 8 | 0 |
+| DirectVulkan | Magma | **73.32%** | 73.05% | 88 | 8 | 3 |
 
 ## Contents