[Piglit] [PATCH 06/12] msaa: Add test to verify sample-alpha-to-coverage with integer draw buffers
Anuj Phogat
anuj.phogat at gmail.com
Mon Jul 16 15:55:05 PDT 2012
When draw buffer zero is bound to an integer format buffer,
GL_SAMPLE_ALPHA_TO_COVERAGE should have no effect. This should work
properly even if there are other draw buffers that are not in integer
format.
Note: This test currently fails with Mesa on my Sandybridge system.
Reviewed-by: Paul Berry <stereotype441 at gmail.com>
Signed-off-by: Anuj Phogat <anuj.phogat at gmail.com>
---
tests/all.tests | 6 +
.../ext_framebuffer_multisample/CMakeLists.gl.txt | 2 +
.../int-draw-buffers-alpha-to-coverage.cpp | 132 ++++++++++++++++++++
3 files changed, 140 insertions(+), 0 deletions(-)
create mode 100644 tests/spec/ext_framebuffer_multisample/int-draw-buffers-alpha-to-coverage.cpp
diff --git a/tests/all.tests b/tests/all.tests
index 57905ed..1a203e3 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -1448,6 +1448,12 @@ for num_samples in MSAA_SAMPLE_COUNTS:
ext_framebuffer_multisample[test_name] = PlainExecTest(executable)
for num_samples in MSAA_SAMPLE_COUNTS:
+ test_name = ' '.join(['int-draw-buffers-alpha-to-coverage', str(num_samples)])
+ executable = 'ext_framebuffer_multisample-{0} -auto'.format(
+ test_name)
+ ext_framebuffer_multisample[test_name] = PlainExecTest(executable)
+
+for num_samples in MSAA_SAMPLE_COUNTS:
test_name = ' '.join(['bitmap', str(num_samples)])
executable = 'ext_framebuffer_multisample-{0} -auto'.format(
test_name)
diff --git a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
index ad64321..81aa42e 100644
--- a/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
+++ b/tests/spec/ext_framebuffer_multisample/CMakeLists.gl.txt
@@ -26,6 +26,8 @@ piglit_add_executable (ext_framebuffer_multisample-formats common.cpp formats.cp
piglit_add_executable (ext_framebuffer_multisample-interpolation common.cpp interpolation.cpp)
piglit_add_executable (ext_framebuffer_multisample-int-draw-buffers-alpha-to-one common.cpp
draw-buffers-common.cpp int-draw-buffers-alpha-to-one.cpp)
+piglit_add_executable (ext_framebuffer_multisample-int-draw-buffers-alpha-to-coverage common.cpp
+ draw-buffers-common.cpp int-draw-buffers-alpha-to-coverage.cpp)
piglit_add_executable (ext_framebuffer_multisample-line-smooth common.cpp line-smooth.cpp)
piglit_add_executable (ext_framebuffer_multisample-minmax minmax.c)
piglit_add_executable (ext_framebuffer_multisample-multisample-blit common.cpp multisample-blit.cpp)
diff --git a/tests/spec/ext_framebuffer_multisample/int-draw-buffers-alpha-to-coverage.cpp b/tests/spec/ext_framebuffer_multisample/int-draw-buffers-alpha-to-coverage.cpp
new file mode 100644
index 0000000..40b9ddf
--- /dev/null
+++ b/tests/spec/ext_framebuffer_multisample/int-draw-buffers-alpha-to-coverage.cpp
@@ -0,0 +1,132 @@
+/*
+ * Copyright © 2012 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.
+ */
+
+#include "draw-buffers-common.h"
+
+/**
+ * \file int-draw-buffers-alpha-to-coverage.cpp
+ *
+ * Verify sample alpha to coverage with integer draw buffers.
+ *
+ * When draw buffer zero is bound to an integer format buffer,
+ * GL_SAMPLE_ALPHA_TO_COVERAGE should have no effect. This should work
+ * properly even if there are other draw buffers that are not in integer
+ * format.
+ *
+ * This test operates by drawing a pattern in multisample FBO to generate
+ * reference and test images for all the draw buffers. Reference images are drawn
+ * to right half of window system draw buffer and test images to left half.
+ *
+ * Compare the left and right halves of window system frame buffer to verify
+ * the test image.
+ *
+ * Author: Anuj Phogat <anuj.phogat at gmail.com>
+ */
+
+PIGLIT_GL_TEST_MAIN(512 /*window_width*/,
+ 768 /*window_height*/,
+ GLUT_DOUBLE | GLUT_RGBA | GLUT_ALPHA)
+
+/* At present fragment shader in draw-buffers-common.cpp supports only
+ * fixed number of attachments = 3.
+ */
+static int num_attachments = 3;
+static int samples;
+
+void
+print_usage_and_exit(char *prog_name)
+{
+ printf("Usage: %s <num_samples>\n", prog_name);
+ piglit_report_result(PIGLIT_FAIL);
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+
+ if (argc < 2)
+ print_usage_and_exit(argv[0]);
+ {
+ char *endptr = NULL;
+ samples = strtol(argv[1], &endptr, 0);
+ if (endptr != argv[1] + strlen(argv[1]))
+ print_usage_and_exit(argv[0]);
+ }
+
+ piglit_require_gl_version(30);
+
+ int pattern_width = piglit_width / 2;
+ int pattern_height = piglit_height / num_attachments;
+
+ piglit_ortho_projection(pattern_width,
+ pattern_height,
+ GL_TRUE);
+ /* Skip the test if samples > GL_MAX_SAMPLES */
+ GLint max_samples;
+ glGetIntegerv(GL_MAX_SAMPLES, &max_samples);
+
+ if (samples > max_samples)
+ piglit_report_result(PIGLIT_SKIP);
+ /* Testing of integer formats other than GL_RGBA8I is not supported
+ * by utility functions in draw-buffers-common.cpp.
+ */
+ ms_fbo_and_draw_buffers_setup(samples,
+ pattern_width,
+ pattern_height,
+ num_attachments,
+ GL_COLOR_BUFFER_BIT,
+ GL_RGBA8I);
+ shader_compile();
+}
+
+enum piglit_result
+piglit_display()
+{
+ bool pass = true;
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+ glClearColor(0.0, 0.0, 0.0, 1.0);
+ glClear(GL_COLOR_BUFFER_BIT);
+ allocate_data_arrays();
+
+ draw_reference_image(true /* sample_alpha_to_coverage */,
+ false /* sample_alpha_to_one */);
+
+ draw_test_image(true /* sample_alpha_to_coverage */,
+ false /* sample_alpha_to_one */);
+
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, 0);
+ pass = piglit_probe_rect_halves_equal_rgba(0, 0,
+ piglit_width,
+ piglit_height)
+ && pass;
+
+ /* Free the memory allocated for data arrays */
+ free_data_arrays();
+
+ if (!piglit_automatic)
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
1.7.7.6
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