arb_shader_atomic_counters: Test that atomics vs default uniform block.

v2: Drop #define L (changes by anholt, acked by Francisco)

Reviewed-by: Eric Anholt <eric@anholt.net>

2 files changed, 121 insertions, 0 deletions

diff --git a/tests/spec/arb_shader_atomic_counters/CMakeLists.gl.txt b/tests/spec/arb_shader_atomic_counters/CMakeLists.gl.txt
index 93dec7d16..f9479de74 100644
--- a/tests/spec/arb_shader_atomic_counters/CMakeLists.gl.txt
+++ b/tests/spec/arb_shader_atomic_counters/CMakeLists.gl.txt
@@ -13,5 +13,6 @@ link_libraries (
 add_executable (arb_shader_atomic_counters-active-counters active-counters.c common.c)
 add_executable (arb_shader_atomic_counters-array-indexing array-indexing.c common.c)
 add_executable (arb_shader_atomic_counters-buffer-binding buffer-binding.c common.c)
+add_executable (arb_shader_atomic_counters-default-partition default-partition.c common.c)
 
 # vim: ft=cmake:
diff --git a/tests/spec/arb_shader_atomic_counters/default-partition.c b/tests/spec/arb_shader_atomic_counters/default-partition.c
new file mode 100644
index 000000000..b9dbdf9f9
--- /dev/null
+++ b/tests/spec/arb_shader_atomic_counters/default-partition.c
@@ -0,0 +1,120 @@
+/*
+ * Copyright © 2013 Intel Corporation
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the next
+ * paragraph) shall be included in all copies or substantial portions of the
+ * Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+ * IN THE SOFTWARE.
+ */
+
+/** @file default-partition.c
+ *
+ *  Test that the following is met:
+ *
+ *  "Unlike other user-defined uniforms declared at global scope,
+ *   [atomic counters] take NO storage from the default partition,
+ *   they have NO location [...]"
+ *
+ * (from the ARB_shader_atomic_counters specification)
+ */
+
+#include "common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+        config.supports_gl_core_version = 31;
+
+        config.window_width = 1;
+        config.window_height = 1;
+        config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static bool
+run_test(unsigned max_uniforms)
+{
+        const char *fs_template = "#version 140\n"
+                "#extension GL_ARB_shader_atomic_counters : enable\n"
+                "\n"
+                "#define N %d\n"
+                "\n"
+                "out ivec4 fcolor;\n"
+                "layout(binding=0) uniform atomic_uint x;\n"
+                "uniform uint y[N];\n"
+                "\n"
+                "void main() {\n"
+                "       int i;\n"
+                "       uint z = atomicCounter(x);\n"
+                "       \n"
+                "       for (i = 0; i < N; ++i)\n"
+                "               z += y[i];\n"
+                "       \n"
+                "       fcolor.x = int(z);\n"
+                "}\n";
+        char *fs_source;
+        GLuint prog = glCreateProgram();
+        int n = 0, ret;
+
+        ret = asprintf(&fs_source, fs_template, max_uniforms);
+        assert(ret > 0);
+
+        /* This should fail to link if 'x' ended up being accounted in
+         * the default uniform partition because 'y[]' uses up the
+         * whole available uniform space. */
+        atomic_counters_compile(prog, GL_FRAGMENT_SHADER, fs_source);
+        glLinkProgram(prog);
+        if (!piglit_check_gl_error(GL_NO_ERROR))
+                return false;
+
+        glGetProgramiv(prog, GL_ACTIVE_UNIFORMS, &n);
+        if (n != 2) {
+                printf("Unexpected number of active uniforms %d.\n", n);
+                return false;
+        }
+
+        if (glGetUniformLocation(prog, "x") != -1) {
+                printf("Atomic counter unexpectedly reported to have a"
+                       " location.\n");
+                return false;
+        }
+
+        free(fs_source);
+        glDeleteProgram(prog);
+        return true;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+        struct atomic_counters_limits ls = atomic_counters_get_limits();
+        enum piglit_result status = PIGLIT_PASS;
+
+        piglit_require_gl_version(31);
+        piglit_require_extension("GL_ARB_shader_atomic_counters");
+
+        atomic_counters_subtest(&status, GL_FRAGMENT_SHADER,
+                                "Atomic counter location",
+                                run_test, ls.uniform_components);
+
+        piglit_report_result(status);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+        return PIGLIT_PASS;
+}