Currently fails with llvmpipe. Fragments with alpha <= 0.5 are discarded.
Passes with softpipe, NVIDIA driver.
---
tests/all.py | 1 +
tests/spec/CMakeLists.txt | 1 +
tests/spec/gl-1.3/CMakeLists.gl.txt | 13 +++++
tests/spec/gl-1.3/CMakeLists.txt | 1 +
tests/spec/gl-1.3/alpha_to_coverage_nop.c | 90 +++++++++++++++++++++++++++++++
5 files changed, 106 insertions(+)
create mode 100644 tests/spec/gl-1.3/CMakeLists.gl.txt
create mode 100644 tests/spec/gl-1.3/CMakeLists.txt
create mode 100644 tests/spec/gl-1.3/alpha_to_coverage_nop.c
diff --git a/tests/all.py b/tests/all.py
index a448331..8610101 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -840,6 +840,7 @@ with profile.group_manager(
g(['gl-1.1-xor'])
g(['gl-1.1-xor-copypixels'])
g(['gl-1.2-texture-base-level'])
+ g(['gl-1.3-alpha_to_coverage'])
g(['hiz'], run_concurrent=False)
g(['infinite-spot-light'], run_concurrent=False)
g(['line-aa-width'], run_concurrent=False)
diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
index 9b0f73e..9972785 100644
--- a/tests/spec/CMakeLists.txt
+++ b/tests/spec/CMakeLists.txt
@@ -106,6 +106,7 @@ add_subdirectory (glsl-es-3.00)
add_subdirectory (gl-1.0)
add_subdirectory (gl-1.1)
add_subdirectory (gl-1.2)
+add_subdirectory (gl-1.3)
add_subdirectory (gl-1.4)
add_subdirectory (gl-1.5)
add_subdirectory (gl-2.0)
diff --git a/tests/spec/gl-1.3/CMakeLists.gl.txt
b/tests/spec/gl-1.3/CMakeLists.gl.txt
new file mode 100644
index 0000000..607d2c1
--- /dev/null
+++ b/tests/spec/gl-1.3/CMakeLists.gl.txt
@@ -0,0 +1,13 @@
+include_directories(
+ ${GLEXT_INCLUDE_DIR}
+ ${OPENGL_INCLUDE_PATH}
+)
+
+link_libraries (
+ piglitutil_${piglit_target_api}
+ ${OPENGL_gl_LIBRARY}
+)
+
+piglit_add_executable (gl-1.3-alpha_to_coverage_nop alpha_to_coverage_nop.c)
+
+# vim: ft=cmake:
diff --git a/tests/spec/gl-1.3/CMakeLists.txt b/tests/spec/gl-1.3/CMakeLists.txt
new file mode 100644
index 0000000..4a012b9
--- /dev/null
+++ b/tests/spec/gl-1.3/CMakeLists.txt
@@ -0,0 +1 @@
+piglit_include_target_api()
\ No newline at end of file
diff --git a/tests/spec/gl-1.3/alpha_to_coverage_nop.c
b/tests/spec/gl-1.3/alpha_to_coverage_nop.c
new file mode 100644
index 0000000..da8323e
--- /dev/null
+++ b/tests/spec/gl-1.3/alpha_to_coverage_nop.c
@@ -0,0 +1,90 @@
+/*
+ * Copyright © 2016 VMware, Inc.
+ *
+ * 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.
+ */
+
+
+/**
+ * Test that enabling GL_ALPHA_TO_COVERAGE has no effect for non-MSAA
+ * rendering.
+ */
+
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+ config.supports_gl_compat_version = 13;
+ config.window_visual = PIGLIT_GL_VISUAL_RGBA | PIGLIT_GL_VISUAL_DOUBLE;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+void
+piglit_init(int argc, char **argv)
+{
+ /* nothing */
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ GLint samples;
+ float alpha;
+
+ glGetIntegerv(GL_SAMPLES, &samples);
+ if (samples != 0) {
+ printf("Unexpected GL_SAMPLES = %d\n", samples);
+ return PIGLIT_FAIL;
+ }
+
+ glGetIntegerv(GL_SAMPLE_BUFFERS, &samples);
+ if (samples != 0) {
+ printf("Unexpected GL_SAMPLE_BUFFERS = %d\n", samples);
+ return PIGLIT_FAIL;
+ }
+
+ glClearColor(1, 0, 0, 0);
+
+ /* Enabling GL_SAMPLE_ALPHA_TO_COVERAGE should have no effect
+ * with a non-MSAA drawing surface.
+ */
+ glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE);
+
+ /* Render quad with varying alpha value. Make sure it draws
+ * and is not missing because of some kind of MSAA coverage bug.
+ */
+ for (alpha = 1.0; alpha >= 0.0; alpha -= 1.0/128) {
+ float expected[4] = {alpha, alpha, alpha, alpha};
+
+ glClear(GL_COLOR_BUFFER_BIT);
+ glColor4fv(expected);
+ piglit_draw_rect(-1, -1, 2, 2);
+
+ if (!piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
+ expected)) {
+ printf("Rect did not draw for alpha = %g\n", alpha);
+ return PIGLIT_FAIL;
+ }
+
+ piglit_present_results();
+ }
+
+ return PIGLIT_PASS;
+}
