glSpirvTests: fix transform feedback query

The test removes the names for several variables of the shader, and
then it expect a length of 1 for all of them when doing a state
query.

But on the case of TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH it is not
activating any varying.

This commits adds an output definition with xfb decorations so the
variable would become active without the need to call
glTransformFeedbackVaryings. From ARB_gl_spirv spec:

    "If the shader used to record output variables for transform
    feedback varyings uses the xfb_buffer, xfb_offset, or xfb_stride
    layout qualifiers, or its SPIR-V entry point declares the *Xfb*
    Execution Mode, the values specified by TransformFeedbackVaryings
    are ignored, and the set of variables captured for transform
    feedback is instead derived from the specified layout qualifiers
    or SPIR-V decorations: outputs specifying both an *XfbBuffer* and
    an *Offset* are captured, while outputs not specifying both of
    these are not captured. Values are captured each time the shader
    writes to such a decorated object."

As we are here, we also simplify how name reflection is
stripped. Instead of stripping each individual OpName and OpMemberName
that we know the shader have, we just remove any OpName and
OpMemberName line.

Modules: OpenGL

VK-GL-CTS issue: 886

Affects:
KHR-GL45.gl_spirv.spirv_modules_state_queries_test
KHR-GL46.gl_spirv.spirv_modules_state_queries_test

Change-Id: I124c90c61f8bee1e873867cf0d2b2e689679d70a

diff --git a/external/openglcts/data/spirv/modules_state_queries/vertex.nspv b/external/openglcts/data/spirv/modules_state_queries/vertex.nspv
index 3742ddc..39e6b48 100644 (file)
Binary files a/external/openglcts/data/spirv/modules_state_queries/vertex.nspv and b/external/openglcts/data/spirv/modules_state_queries/vertex.nspv differ

diff --git a/external/openglcts/modules/gl/gl4cGlSpirvTests.cpp b/external/openglcts/modules/gl/gl4cGlSpirvTests.cpp
index f737779..e737dc8 100644 (file)
--- a/external/openglcts/modules/gl/gl4cGlSpirvTests.cpp
+++ b/external/openglcts/modules/gl/gl4cGlSpirvTests.cpp
@@ -1073,6 +1073,10 @@ void SpirvModulesStateQueriesTest::init()
                           "    vec4 c1;\n"
                           "    vec2 c2;\n"
                           "} components;\n"
+                          "layout (xfb_buffer = 0, xfb_offset = 16) out gl_PerVertex\n"
+                          "{\n"
+                          "    vec4 gl_Position;\n"
+                          "};\n"
                           "\n"
                           "void main()\n"
                           "{\n"
@@ -1109,13 +1113,10 @@ tcu::TestNode::IterateResult SpirvModulesStateQueriesTest::iterate()
                std::string                              input;
                for (int i = 0; i < (signed)lines.size(); ++i)
                {
-                       if (lines[i].find("OpName %position") != std::string::npos)
-                               continue;
-                       if (lines[i].find("OpName %extPosition") != std::string::npos)
+                       if (lines[i].find("OpName") != std::string::npos)
                                continue;
-                       if (lines[i].find("OpName %ComponentsBlock") != std::string::npos)
-                               continue;
-                       if (lines[i].find("OpName %components") != std::string::npos)
+
+                       if (lines[i].find("OpMemberName") != std::string::npos)
                                continue;
 
                        input.append(lines[i] + "\n");
@@ -1162,18 +1163,16 @@ tcu::TestNode::IterateResult SpirvModulesStateQueriesTest::iterate()
        }
 
        // 3) Check if queries for ACTIVE_ATTRIBUTE_MAX_LENGTH, ACTIVE_UNIFORM_MAX_LENGTH,
-       //    ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH return value equal to 1, and
-       //    TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH value equals to 0
+       //    ACTIVE_UNIFORM_BLOCK_MAX_NAME_LENGTH and TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH return
+       //    value equal to 1
        GLint programState[4];
-       GLint expectedValues[4] = {1, 1, 0, 1};
+       GLint expectedValues[4] = {1, 1, 1, 1};
        gl.getProgramiv(program.getProgram(), GL_ACTIVE_ATTRIBUTE_MAX_LENGTH, &programState[0]);
        GLU_EXPECT_NO_ERROR(gl.getError(), "getProgramiv");
 
        gl.getProgramiv(program.getProgram(), GL_ACTIVE_UNIFORM_MAX_LENGTH, &programState[1]);
        GLU_EXPECT_NO_ERROR(gl.getError(), "getProgramiv");
 
-       // We expect 0 for GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH because the current program
-       // doesn't activate transform feedback so there isn't any active varying.
        gl.getProgramiv(program.getProgram(), GL_TRANSFORM_FEEDBACK_VARYING_MAX_LENGTH, &programState[2]);
        GLU_EXPECT_NO_ERROR(gl.getError(), "getProgramiv");