Fix gl_FragData[u_index] test in OpenGL ES 3.x context

The test is valid if GL_EXT_draw_buffers or GL_NV_draw_buffers
is supported

Affects:
dEQP-GLES3.functional.shaders.fragdata.draw_buffers

Components: OpenGL

VK-GL-CTS issue: 1168

Change-Id: I44b41330ca37614920ed1cb0d6d021a8bc1e0fa3

diff --git a/modules/gles3/functional/es3fShaderFragDataTests.cpp b/modules/gles3/functional/es3fShaderFragDataTests.cpp
index 46063c3..dd0e578 100644 (file)
--- a/modules/gles3/functional/es3fShaderFragDataTests.cpp
+++ b/modules/gles3/functional/es3fShaderFragDataTests.cpp
@@ -61,6 +61,24 @@ enum IndexExprType
        INDEX_EXPR_TYPE_LAST
 };
 
+static bool isExtensionSupported (const glu::RenderContext& renderCtx, const std::string& extension)
+{
+       const glw::Functions&   gl              = renderCtx.getFunctions();
+       int                                             numExts = 0;
+
+       gl.getIntegerv(GL_NUM_EXTENSIONS, &numExts);
+
+       for (int ndx = 0; ndx < numExts; ndx++)
+       {
+               const char* curExt = (const char*)gl.getStringi(GL_EXTENSIONS, ndx);
+
+               if (extension == curExt)
+                       return true;
+       }
+
+       return false;
+}
+
 static bool compareSingleColor (tcu::TestLog& log, const tcu::Surface& surface, tcu::RGBA expectedColor, tcu::RGBA threshold)
 {
        const int       maxPrints                       = 10;
@@ -227,7 +245,12 @@ public:
 
        IterateResult iterate (void)
        {
-               const glu::RenderContext&               renderCtx               = m_context.getRenderContext();
+               const glu::RenderContext&               renderCtx                       = m_context.getRenderContext();
+
+               int                                                             num_test_attachment     = 2;
+               if(!isExtensionSupported(renderCtx, "GL_EXT_draw_buffers") && !isExtensionSupported(renderCtx, "GL_NV_draw_buffers"))
+                       num_test_attachment = 1;
+
                const glu::ShaderProgram                program                 (renderCtx, glu::ProgramSources()
                                                                                                                        << glu::VertexSource(
                                                                                                                                "attribute highp vec4 a_position;\n"
@@ -281,7 +304,7 @@ public:
                        throw tcu::NotSupportedError("Dynamic indexing of gl_FragData[] not supported");
 
                gl.bindFramebuffer(GL_FRAMEBUFFER, *fbo);
-               for (int ndx = 0; ndx < 2; ndx++)
+               for (int ndx = 0; ndx < num_test_attachment; ndx++)
                {
                        const deUint32  rbo     = ndx == 0 ? *colorBuf0 : *colorBuf1;
 
@@ -304,7 +327,7 @@ public:
                bool                    allOk           = true;
                const tcu::RGBA threshold       = renderCtx.getRenderTarget().getPixelFormat().getColorThreshold() + tcu::RGBA(1,1,1,1);
 
-               for (int ndx = 0; ndx < 2; ndx++)
+               for (int ndx = 0; ndx < num_test_attachment; ndx++)
                {
                        gl.clearBufferfv(GL_COLOR, 0, tcu::RGBA::red().toVec().getPtr());
                        gl.clearBufferfv(GL_COLOR, 1, tcu::RGBA::red().toVec().getPtr());