arb_shader_atomic_counters: Test dynamic indexing of atomic counter arrays.

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

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

2 files changed, 174 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 4249ff07d..83e38ecea 100644
--- a/tests/spec/arb_shader_atomic_counters/CMakeLists.gl.txt
+++ b/tests/spec/arb_shader_atomic_counters/CMakeLists.gl.txt
@@ -11,5 +11,6 @@ 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)
 
 # vim: ft=cmake:
diff --git a/tests/spec/arb_shader_atomic_counters/array-indexing.c b/tests/spec/arb_shader_atomic_counters/array-indexing.c
new file mode 100644
index 000000000..030ab581c
--- /dev/null
+++ b/tests/spec/arb_shader_atomic_counters/array-indexing.c
@@ -0,0 +1,173 @@
+/*
+ * 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 array-indexing.c
+ *
+ * Check that dynamically uniform indexing of an atomic counter array
+ * works as expected.
+ */
+
+#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
+set_uniform_int(GLuint prog, const char *name, int value)
+{
+        int loc;
+
+        glLinkProgram(prog);
+        glUseProgram(prog);
+
+        loc = glGetUniformLocation(prog, name);
+        if (loc < 0)
+                return false;
+
+        glUniform1i(loc, value);
+
+        return piglit_check_gl_error(GL_NO_ERROR);
+}
+
+static bool
+run_test_vertex(void)
+{
+        const char *fs_source = "#version 140\n"
+                "flat in ivec4 vcolor;\n"
+                "out ivec4 fcolor;\n"
+                "void main() {\n"
+                "       fcolor = vcolor;\n"
+                "}\n";
+        const char *vs_source = "#version 140\n"
+                "#extension GL_ARB_shader_atomic_counters : enable\n"
+                "\n"
+                "layout(binding = 0, offset = 4) uniform atomic_uint x[3];\n"
+                "in vec4 position;\n"
+                "flat out ivec4 vcolor;\n"
+                "uniform int index;\n"
+                "\n"
+                "void main() {\n"
+                "       vcolor.x = int(atomicCounterIncrement(x[1 + index]));\n"
+                "       vcolor.y = int(atomicCounterIncrement(x[0 + index]));\n"
+                "       vcolor.z = int(atomicCounterIncrement(x[1 + index]));\n"
+                "       vcolor.w = int(atomicCounterIncrement(x[0 + index]));\n"
+                "       gl_Position = position;\n"
+                "}\n";
+        const unsigned int start[] = { 1, 2, 4, 8 };
+        const unsigned int expected[] = { 8, 4, 9, 5 };
+        GLuint prog = glCreateProgram();
+        bool ret =
+                atomic_counters_compile(prog, GL_FRAGMENT_SHADER, fs_source) &&
+                atomic_counters_compile(prog, GL_VERTEX_SHADER, vs_source) &&
+                set_uniform_int(prog, "index", 1) &&
+                atomic_counters_draw_point(prog, sizeof(start), start) &&
+                piglit_probe_rect_rgba_uint(0, 0, 1, 1, expected);
+
+        glDeleteProgram(prog);
+        return ret;
+}
+
+static bool
+run_test_fragment(void)
+{
+        const char *fs_source = "#version 140\n"
+                "#extension GL_ARB_shader_atomic_counters : enable\n"
+                "\n"
+                "out ivec4 fcolor;\n"
+                "uniform int index;\n"
+                "layout(binding = 0, offset = 4) uniform atomic_uint x[3];\n"
+                "\n"
+                "void main() {\n"
+                "       fcolor.x = int(atomicCounterIncrement(x[1 + index]));\n"
+                "       fcolor.y = int(atomicCounterIncrement(x[0 + index]));\n"
+                "       fcolor.z = int(atomicCounterIncrement(x[1 + index]));\n"
+                "       fcolor.w = int(atomicCounterIncrement(x[0 + index]));\n"
+                "}\n";
+        const char *vs_source = "#version 140\n"
+                "#extension GL_ARB_shader_atomic_counters : enable\n"
+                "\n"
+                "in vec4 position;\n"
+                "\n"
+                "void main() {\n"
+                "       gl_Position = position;\n"
+                "}\n";
+        const uint32_t start[] = { 1, 2, 4, 8 };
+        const unsigned int expected[] = { 8, 4, 9, 5 };
+        GLuint prog = glCreateProgram();
+        bool ret =
+                atomic_counters_compile(prog, GL_FRAGMENT_SHADER, fs_source) &&
+                atomic_counters_compile(prog, GL_VERTEX_SHADER, vs_source) &&
+                set_uniform_int(prog, "index", 1) &&
+                atomic_counters_draw_point(prog, sizeof(start), start) &&
+                piglit_probe_rect_rgba_uint(0, 0, 1, 1, expected);
+
+        glDeleteProgram(prog);
+        return ret;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+        GLuint fb, rb, buffer;
+
+        piglit_require_gl_version(31);
+        piglit_require_extension("GL_ARB_shader_atomic_counters");
+
+        glGenFramebuffers(1, &fb);
+        glGenRenderbuffers(1, &rb);
+
+        glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fb);
+        glBindFramebuffer(GL_READ_FRAMEBUFFER, fb);
+        glBindRenderbuffer(GL_RENDERBUFFER, rb);
+
+        glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA32UI, 1, 1);
+        glFramebufferRenderbuffer(GL_DRAW_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+                                  GL_RENDERBUFFER, rb);
+
+        glGenBuffers(1, &buffer);
+        glBindBufferBase(GL_ATOMIC_COUNTER_BUFFER, 0, buffer);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+        enum piglit_result status = PIGLIT_PASS;
+
+        atomic_counters_subtest(&status, GL_FRAGMENT_SHADER,
+                                "Fragment atomic counter array access",
+                                run_test_fragment);
+
+        atomic_counters_subtest(&status, GL_VERTEX_SHADER,
+                                "Vertex atomic counter array access",
+                                run_test_vertex);
+
+        piglit_report_result(status);
+        return status;
+}