[Piglit] [PATCH 14/18] gles3: Test transform-feedback to uniform-buffer-object
Fabian Bieler
fabianbieler at fastmail.fm
Sun Jan 7 22:14:09 UTC 2018
Some tiling renderers reorder draw-calls for performance reasons.
This could interfere with the integrity of resources written to by draws
calls and read from by subsequent draw calls.
This test uses a buffer object, written by transform feedback and read as a
uniform buffer object.
With blending enabled, draw 3 identical passes:
Each pass consists of two sub-passes:
First sub-pass: Draw a grid of 8x8 transparent quads (each 32x32 pixels in
size). Write the index of the current pass with transform feedback in a
buffer object.
Second sub-pass: Draw another grid of 8x8 quads. If the buffer object
contains the index of the current pass output transparent, white otherwise.
Check that the framebuffer is unaltered.
---
tests/all.py | 1 +
tests/spec/gles-3.0/CMakeLists.gles3.txt | 1 +
.../transform-feedback-uniform-buffer-object.c | 191 +++++++++++++++++++++
3 files changed, 193 insertions(+)
create mode 100644 tests/spec/gles-3.0/transform-feedback-uniform-buffer-object.c
diff --git a/tests/all.py b/tests/all.py
index 6abcb3aa8..5fb59dce8 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -4649,6 +4649,7 @@ with profile.test_list.group_manager(
g(['minmax_gles3'], 'minmax')
g(['texture-immutable-levels_gles3'], 'texture-immutable-levels')
g(['gles-3.0-drawarrays-vertexid'], 'gl_VertexID used with glDrawArrays')
+ g(['gles-3.0-transform-feedback-uniform-buffer-object'])
for test_mode in ['teximage', 'texsubimage']:
g(['ext_texture_array-compressed_gles3', test_mode, '-fbo'],
diff --git a/tests/spec/gles-3.0/CMakeLists.gles3.txt b/tests/spec/gles-3.0/CMakeLists.gles3.txt
index 864c862fd..acaf64574 100644
--- a/tests/spec/gles-3.0/CMakeLists.gles3.txt
+++ b/tests/spec/gles-3.0/CMakeLists.gles3.txt
@@ -7,5 +7,6 @@ piglit_add_executable(minmax_${piglit_target_api} minmax.c)
piglit_add_executable(oes_compressed_etc2_texture-miptree_gles3 oes_compressed_etc2_texture-miptree.c)
piglit_add_executable(texture-immutable-levels_gles3 texture-immutable-levels.c)
piglit_add_executable(read_depth_gles3 read-depth.c)
+piglit_add_executable(gles-3.0-transform-feedback-uniform-buffer-object transform-feedback-uniform-buffer-object.c)
# vim: ft=cmake:
diff --git a/tests/spec/gles-3.0/transform-feedback-uniform-buffer-object.c b/tests/spec/gles-3.0/transform-feedback-uniform-buffer-object.c
new file mode 100644
index 000000000..e4a6a00e0
--- /dev/null
+++ b/tests/spec/gles-3.0/transform-feedback-uniform-buffer-object.c
@@ -0,0 +1,191 @@
+/*
+ * Copyright © 2017 Fabian Bieler
+ *
+ * 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 transform-feedback-uniform-buffer-object.c
+ *
+ * Some tiling renderers reorder draw-calls for performance reasons.
+ * This could interfere with the integrity of resources written to by draws
+ * calls and read from by subsequent draw calls.
+ *
+ * This test uses a buffer object, written by transform feedback and read as a
+ * uniform buffer object.
+ *
+ * With blending enabled, draw 3 identical passes:
+ * Each pass consists of two sub-passes:
+ * First sub-pass: Draw a grid of 8x8 transparent quads (each 32x32 pixels in
+ * size). Write the index of the current pass with transform feedback in a
+ * buffer object.
+ * Second sub-pass: Draw another grid of 8x8 quads. If the buffer object
+ * contains the index of the current pass output transparent, white otherwise.
+ *
+ * Check that the framebuffer is unaltered.
+ */
+
+#include "piglit-util-gl.h"
+
+#define TILESIZE 32
+#define X_TILES 8
+#define Y_TILES 8
+#define BO_SIZE (X_TILES * Y_TILES * 6 * 4 * sizeof(float))
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+ config.supports_gl_es_version = 30;
+ config.window_visual = PIGLIT_GL_VISUAL_RGB;
+ config.window_width = TILESIZE * X_TILES;
+ config.window_height = TILESIZE * Y_TILES;
+ config.khr_no_error_support = PIGLIT_NO_ERRORS;
+PIGLIT_GL_TEST_CONFIG_END
+
+static const char *vs_tf_src =
+ "#version 300 es\n"
+ "uniform int tf_pass;\n"
+ "in vec4 piglit_vertex;\n"
+ "flat out int out_pass;\n"
+ "void main()\n"
+ "{\n"
+ " out_pass = tf_pass;\n"
+ " gl_Position = piglit_vertex;\n"
+ "}\n";
+
+static const char *fs_tf_src =
+ "#version 300 es\n"
+ "precision highp float;\n"
+ "out vec4 frag_color;\n"
+ "void main()\n"
+ "{\n"
+ " frag_color = vec4(0.0);\n"
+ "}\n";
+
+static const char *vs_ubo_src =
+ "#version 300 es\n"
+ "uniform int ubo_pass;\n"
+ "uniform int tile;\n"
+ "uniform ubo {\n"
+ " int tf_pass[8 * 8 * 6];\n"
+ "};\n"
+ "in vec4 piglit_vertex;\n"
+ "flat out vec4 color;\n"
+ "void main()\n"
+ "{\n"
+ " color = vec4(0.0);\n"
+ " for (int i = 0; i < tf_pass.length(); ++i)\n"
+ " if (ubo_pass != tf_pass[i])\n"
+ " color[ubo_pass] = 1.0;\n"
+ " gl_Position = piglit_vertex;\n"
+ "}\n";
+
+static const char *fs_ubo_src =
+ "#version 300 es\n"
+ "precision highp float;\n"
+ "flat in vec4 color;\n"
+ "out vec4 frag_color;\n"
+ "void main()\n"
+ "{\n"
+ " frag_color = color;\n"
+ "}\n";
+
+static int tf_prog, ubo_prog;
+static unsigned buffer_object;
+
+void
+piglit_init(int argc, char **argv)
+{
+ tf_prog = piglit_build_simple_program_unlinked(vs_tf_src, fs_tf_src);
+ ubo_prog = piglit_build_simple_program(vs_ubo_src, fs_ubo_src);
+
+ const char *name = "out_pass";
+ glTransformFeedbackVaryings(tf_prog, 1, &name, GL_INTERLEAVED_ATTRIBS);
+ glLinkProgram(tf_prog);
+
+ glGenBuffers(1, &buffer_object);
+ glBindBuffer(GL_TRANSFORM_FEEDBACK_BUFFER, buffer_object);
+ glBufferData(GL_TRANSFORM_FEEDBACK_BUFFER, BO_SIZE, NULL,
+ GL_STREAM_COPY);
+
+ glBlendFunc(GL_ONE, GL_ONE);
+ glEnable(GL_BLEND);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ bool pass = true;
+ const int num_passes = 3;
+ const float black[] = {0, 0, 0};
+
+ int tf_pass_loc = glGetUniformLocation(tf_prog, "tf_pass");
+ int tile_loc = glGetUniformLocation(ubo_prog, "tile");
+ int ubo_pass_loc = glGetUniformLocation(ubo_prog, "ubo_pass");
+ int ubo_idx = glGetUniformBlockIndex(ubo_prog, "ubo");
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ for (int i = 0; i < num_passes; ++i) {
+ glUseProgram(tf_prog);
+ glUniform1i(tf_pass_loc, i);
+ glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0,
+ buffer_object);
+
+ /* Don't enable GL_RASTERIZER_DISCARD to dare the driver
+ * to reorder those draw calls.
+ */
+ glBeginTransformFeedback(GL_TRIANGLES);
+ for (int y = 0; y < Y_TILES; ++y) {
+ for (int x = 0; x < X_TILES; ++x) {
+ const float w = 2.0 / X_TILES;
+ const float h = 2.0 / Y_TILES;
+ piglit_draw_rect(-1 + x * w, -1 + y * h,
+ w, h);
+ }
+ }
+ glEndTransformFeedback();
+
+ glBindBufferBase(GL_TRANSFORM_FEEDBACK_BUFFER, 0, 0);
+
+ glUseProgram(ubo_prog);
+ glUniform1i(ubo_pass_loc, i);
+ glBindBufferBase(GL_UNIFORM_BUFFER, 0, buffer_object);
+ glUniformBlockBinding(ubo_prog, ubo_idx, 0);
+
+ for (int y = 0; y < Y_TILES; ++y) {
+ for (int x = 0; x < X_TILES; ++x) {
+ const float w = 2.0 / X_TILES;
+ const float h = 2.0 / Y_TILES;
+ glUniform1i(tile_loc, y * X_TILES + x);
+ piglit_draw_rect(-1 + x * w, -1 + y * h,
+ w, h);
+ }
+ }
+
+ glBindBufferBase(GL_UNIFORM_BUFFER, 0, 0);
+ }
+
+ /* Check result */
+ pass = piglit_probe_rect_rgb(0, 0, piglit_width,
+ piglit_height, black) && pass;
+
+ piglit_present_results();
+
+ return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
--
2.15.1
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