On 19.04.2017 02:58, Plamena Manolova wrote:
A test to check whether GL_ARB_fragment_shader_interlock operates as
expected. This test simulates blending behaviour by using image loads/stores
to a 3D texture. The bledning formula used is:
Type: blending
result = current_alpha * current_color + (1 - current_alpha) * previous_color
Multisampling is also enabled and tested at 2, 4, 8 and 16.
Signed-off-by: Plamena Manolova <[email protected]>
---
tests/all.py | 5 +
tests/spec/CMakeLists.txt | 1 +
.../CMakeLists.gl.txt | 12 +
.../arb_fragment_shader_interlock/CMakeLists.txt | 1 +
.../image-load-store.c | 298 +++++++++++++++++++++
5 files changed, 317 insertions(+)
create mode 100644 tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt
create mode 100644 tests/spec/arb_fragment_shader_interlock/CMakeLists.txt
create mode 100644 tests/spec/arb_fragment_shader_interlock/image-load-store.c
diff --git a/tests/all.py b/tests/all.py
index a832ffb..1a28e62 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -4803,6 +4803,11 @@ with profile.test_list.group_manager(
g(['arb_post_depth_coverage-sample-shading'])
with profile.test_list.group_manager(
+ PiglitGLTest,
+ grouptools.join('spec', 'arb_fragment_shader_interlock')) as g:
+ g(['arb_fragment_shader_interlock-image-load-store'])
+
+with profile.test_list.group_manager(
PiglitGLTest,
grouptools.join('spec', 'arb_shader_image_size')) as g:
g(['arb_shader_image_size-builtin'], 'builtin')
diff --git a/tests/spec/CMakeLists.txt b/tests/spec/CMakeLists.txt
index 5bdde84..5bfa76b 100644
--- a/tests/spec/CMakeLists.txt
+++ b/tests/spec/CMakeLists.txt
@@ -160,3 +160,4 @@ add_subdirectory (arb_shader_texture_image_samples)
add_subdirectory (arb_texture_barrier)
add_subdirectory (intel_conservative_rasterization)
add_subdirectory (arb_post_depth_coverage)
+add_subdirectory (arb_fragment_shader_interlock)
diff --git a/tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt
b/tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt
new file mode 100644
index 0000000..d8bb7da
--- /dev/null
+++ b/tests/spec/arb_fragment_shader_interlock/CMakeLists.gl.txt
@@ -0,0 +1,12 @@
+include_directories(
+ ${GLEXT_INCLUDE_DIR}
+ ${OPENGL_INCLUDE_PATH}
+)
+
+link_libraries (
+ piglitutil_${piglit_target_api}
+ ${OPENGL_gl_LIBRARY}
+)
+
+piglit_add_executable (arb_fragment_shader_interlock-image-load-store
+ image-load-store.c)
diff --git a/tests/spec/arb_fragment_shader_interlock/CMakeLists.txt
b/tests/spec/arb_fragment_shader_interlock/CMakeLists.txt
new file mode 100644
index 0000000..144a306
--- /dev/null
+++ b/tests/spec/arb_fragment_shader_interlock/CMakeLists.txt
@@ -0,0 +1 @@
+piglit_include_target_api()
diff --git a/tests/spec/arb_fragment_shader_interlock/image-load-store.c
b/tests/spec/arb_fragment_shader_interlock/image-load-store.c
new file mode 100644
index 0000000..2f4a7d0
--- /dev/null
+++ b/tests/spec/arb_fragment_shader_interlock/image-load-store.c
@@ -0,0 +1,298 @@
+/*
+ * Copyright (c) 2015 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 "piglit-util-gl.h"
+
+/*
+ * A test to check whether GL_ARB_fragment_shader_interlock operates as
+ * expected. This test simulates blending behaviour by using image loads/stores
+ * to a 3D texture. The bledning formula used is:
Typo: blending
+ * result = current_alpha * current_color + (1 - current_alpha) *
previous_color
+ * Multisampling is also enabled and tested at 2, 4, 8 and 16.
+ */
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+ config.supports_gl_compat_version = 42;
+ config.supports_gl_core_version = 42;
+ config.window_width = 100;
+ config.window_height = 100;
+ config.window_visual = PIGLIT_GL_VISUAL_RGB | PIGLIT_GL_VISUAL_DEPTH |
+ PIGLIT_GL_VISUAL_DOUBLE;
+PIGLIT_GL_TEST_CONFIG_END
+
+static GLuint prog, vao, tex_frame, tex_blend, fbo;
+
+static GLuint
+make_fbo(void)
+{
+ GLuint fbo;
+ glGenFramebuffers(1, &fbo);
+ glBindFramebuffer(GL_FRAMEBUFFER, fbo );
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex_frame);
+ glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0,
+ GL_TEXTURE_2D_MULTISAMPLE, tex_frame, 0);
+
+ return fbo;
+}
+
+static GLuint
+make_shader_program(void)
+{
+ static const char *vs_text =
+ "#version 430\n"
+ "layout(location = 0) in vec4 pos_in;\n"
+ "layout(location = 1) in vec4 col_in;\n"
+ "smooth out vec4 col_vary;\n"
+ "void main()\n"
+ "{\n"
+ " gl_Position = pos_in;\n"
+ " col_vary = col_in;\n"
+ "}\n";
+
+ static const char *fs_text =
+ "#version 430\n"
+ "#extension GL_ARB_fragment_shader_interlock: require\n"
+ "layout(sample_interlock_ordered) in;\n"
Since the shader writes to per-pixel data, it needs to be
pixel_interlock_ordered. Otherwise, there might be a race between shader
invocations that affect the same pixel but disjoint sets of samples
(i.e. along the seams between triangles).
+ "layout(rgba32f, binding = 0) uniform image3D img_output;\n"
+ "layout(location = 1) uniform int sample_rate;\n"
+ "smooth in vec4 col_vary;\n"
+ "out vec4 col_out;\n"
+ "void main()\n"
+ "{\n"
+ " vec4 result = vec4(0.0, 0.0, 0.0, 1.0);\n"
+ " ivec3 current_sample_coord = ivec3(gl_FragCoord.x,
gl_FragCoord.y, gl_SampleID);\n"
+ " ivec3 result_coord = ivec3(gl_FragCoord.x, gl_FragCoord.y,
sample_rate);\n"
+ " int i;\n"
+ " beginInvocationInterlockARB();\n"
+ " vec4 current_sample_color = imageLoad(img_output,
current_sample_coord);\n"
+ " result.rgb += col_vary.a * col_vary.rgb + (1 - col_vary.a) *
current_sample_color.rgb;\n"
+ " imageStore(img_output, current_sample_coord, result);\n"
+ "\n"
+ " for (i = 0; i < sample_rate; i++) {\n"
+ " if (i != gl_SampleID) {\n"
+ " ivec3 sample_coord = ivec3(gl_FragCoord.x,
gl_FragCoord.y, i);\n"
+ " vec4 sample_color = imageLoad(img_output,
sample_coord);\n"
+ " result.rgb += sample_color.rgb;\n"
+ " }\n"
+ " }\n"
+ " result.rgb /= sample_rate;\n"
+ " imageStore(img_output, result_coord, result);\n"
+ " endInvocationInterlockARB();\n"
+ " col_out = result;\n"
+ "}\n";
+
+ GLuint prog;
+
+ prog = piglit_build_simple_program(vs_text, fs_text);
+ glUseProgram(prog);
+
+ glBindAttribLocation(prog, 0, "pos_in");
+ glBindAttribLocation(prog, 1, "col_in");
+
+ glLinkProgram(prog);
+
+ if (!piglit_check_gl_error(GL_NO_ERROR)) {
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ return prog;
+}
+
+static GLuint
+make_texture_buffer(void)
+{
+ GLuint tex;
+
+ glGenTextures(1, &tex);
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
+ glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, 2,
+ GL_RGBA32F, piglit_width, piglit_height, false);
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex);
+
+ return tex;
+}
+
+static GLuint
+make_texture_blend(void)
+{
+ GLuint tex;
+
+ glGenTextures(1, &tex);
+ glActiveTexture(GL_TEXTURE0);
+ glBindTexture(GL_TEXTURE_3D, tex);
+ glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
+ glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
+ glTexParameteri(GL_TEXTURE_3D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
+ glBindImageTexture(0, tex, 0, GL_TRUE, 0, GL_READ_WRITE, GL_RGBA32F);
+
+ return tex;
+}
+
+static GLuint
+make_vao(void)
+{
+ static const float pos_col[18][6] = {
+ { -1.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
+ { 0.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
+ { 0.0, 1.0, 0.0, 1.0, 0.0, 0.25 },
+ { 0.0, 1.0, 0.0, 1.0, 0.0, 0.25 },
+ { -1.0, 1.0, 0.0, 1.0, 0.0, 0.25 },
+ { -1.0, -1.0, 0.0, 1.0, 0.0, 0.25 },
+ { -1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
+ { 1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
+ { 1.0, 1.0, 1.0, 0.0, 0.0, 0.25 },
+ { 1.0, 1.0, 1.0, 0.0, 0.0, 0.25 },
+ { -1.0, 1.0, 1.0, 0.0, 0.0, 0.25 },
+ { -1.0, -1.0, 1.0, 0.0, 0.0, 0.25 },
+ { -1.0, -1.0, 0.0, 0.0, 1.0, 0.25 },
+ { 1.0, -1.0, 0.0, 0.0, 1.0, 0.25 },
+ { 1.0, 1.0, 0.0, 0.0, 1.0, 0.25 },
+ { 1.0, 1.0, 0.0, 0.0, 1.0, 0.25 },
+ { -1.0, 1.0, 0.0, 0.0, 1.0, 0.25 },
+ { -1.0, -1.0, 0.0, 0.0, 1.0, 0.25 }
+ };
+
+ const int stride = sizeof(pos_col[0]);
+ GLuint vbo, vao;
+
+ glGenVertexArrays(1, &vao);
+ glBindVertexArray(vao);
+
+ glGenBuffers(1, &vbo);
+ glBindBuffer(GL_ARRAY_BUFFER, vbo);
+ glBufferData(GL_ARRAY_BUFFER, sizeof(pos_col), pos_col, GL_STATIC_DRAW);
+
+ glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, stride, (void *) 0);
+ glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, stride,
+ (void *)(sizeof(float) * 2));
+
+ glEnableVertexAttribArray(0);
+ glEnableVertexAttribArray(1);
+
+ if (!piglit_check_gl_error(GL_NO_ERROR)) {
+ piglit_report_result(PIGLIT_FAIL);
+ }
+
+ return vao;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ piglit_require_extension("GL_ARB_fragment_shader_interlock");
+
+ glEnable(GL_MULTISAMPLE);
+ glDisable(GL_CULL_FACE);
+ glClearColor(0.0, 0.0, 0.0, 1.0);
+
+ prog = make_shader_program();
+ vao = make_vao();
+ tex_frame = make_texture_buffer();
+ fbo = make_fbo();
+ tex_blend = make_texture_blend();
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ int samples[4] = { 2, 4, 8, 16 };
+ bool pass = true;
+ uint i, j, k, l;
+ uint result1[4] = { 47, 35, 63, 255 };
+ uint result2[4] = { 47, 0, 63, 255 };
+
+ glViewport(0, 0, piglit_width, piglit_height);
+
+ for (i = 0; i < 4; i++) {
+ GLfloat *tex_data = calloc(piglit_width * piglit_height *
+ (samples[i] + 1) * 4, sizeof(GLfloat));
+
+ glTexImage3D(GL_TEXTURE_3D, 0, GL_RGBA32F, piglit_width,
piglit_height,
+ samples[i] + 1, 0, GL_RGBA, GL_FLOAT, tex_data);
Iterations should be skipped when the given number of samples is not
supported.
+
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, fbo);
+ glBindTexture(GL_TEXTURE_2D_MULTISAMPLE, tex_frame);
+ glTexImage2DMultisample(GL_TEXTURE_2D_MULTISAMPLE, samples[i],
+ GL_RGBA8, piglit_width, piglit_height, false);
+ glUniform1i(1, samples[i]);
+
+ glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT |
+ GL_STENCIL_BUFFER_BIT);
+
+ glUseProgram(prog);
+ glDrawArrays(GL_TRIANGLES, 0, 18);
+
+ glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0);
+ glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo);
+ glDrawBuffer(GL_BACK);
+ glBlitFramebuffer(0, 0, piglit_width, piglit_height, 0, 0,
piglit_width,
+ piglit_height, GL_COLOR_BUFFER_BIT, GL_NEAREST);
Maybe add piglit_check_gl_error?
Cheers,
Nicolai
+ piglit_present_results();
+
+ glGetTexImage(GL_TEXTURE_3D, 0, GL_RGBA, GL_FLOAT, tex_data);
+ for (j = 0; j < samples[i] + 1; j++) {
+ for (k = 0; k < piglit_height; k++) {
+ for (l = 0; l < piglit_width; l++) {
+ uint m = ((piglit_width * piglit_height
* j) +
+ (k * piglit_width) + l) * 4;
+ uint r = fabs(tex_data[m]) * 255;
+ uint g = fabs(tex_data[m + 1]) * 255;
+ uint b = fabs(tex_data[m + 2]) * 255;
+ uint a = fabs(tex_data[m + 3]) * 255;
+
+ if ((l < piglit_width / 2) && (r !=
result1[0] ||
+ g != result1[1] || b !=
result1[2] || a != result1[3])) {
+ printf("observed %u %u %u %u %u
%u %u\n", j, k, l, r,
+ g, b, a);
+ printf("expected %u %u %u %u %u
%u %u\n", j, k, l,
+ result1[0], result1[1],
result1[2], result1[3]);
+ pass = false;
+ break;
+ }
+
+ if ((l > piglit_width / 2) && (r !=
result2[0] ||
+ g != result2[1] || b !=
result2[2] || a != result2[3])) {
+ printf("observed %u %u %u %u %u
%u %u\n", j, k, l, r,
+ g, b, a);
+ printf("expected %u %u %u %u %u
%u %u\n", j, k, l,
+ result1[0], result1[1],
result1[2], result1[3]);
+ pass = false;
+ break;
+ }
+ }
+ if (!pass)
+ break;
+ }
+ if (!pass)
+ break;
+ }
+
+ free(tex_data);
+ pass = piglit_check_gl_error(GL_NO_ERROR) && pass;
+ if (!pass)
+ break;
+ }
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
--
Lerne, wie die Welt wirklich ist,
Aber vergiss niemals, wie sie sein sollte.
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