[Piglit] [PATCH 13/25] arb_shader_image_load_store: Import image array indexing test.
Francisco Jerez
currojerez at riseup.net
Sun Oct 5 14:00:43 PDT 2014
Test that indexing of image arrays using dynamically uniform
expressions works as expected.
---
tests/all.py | 1 +
.../arb_shader_image_load_store/CMakeLists.gl.txt | 1 +
tests/spec/arb_shader_image_load_store/indexing.c | 172 +++++++++++++++++++++
3 files changed, 174 insertions(+)
create mode 100644 tests/spec/arb_shader_image_load_store/indexing.c
diff --git a/tests/all.py b/tests/all.py
index 92effb5..c421168 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -4252,6 +4252,7 @@ arb_shader_image_load_store['coherency'] = concurrent_test('arb_shader_image_loa
arb_shader_image_load_store['dead-fragments'] = concurrent_test('arb_shader_image_load_store-dead-fragments')
arb_shader_image_load_store['early-z'] = concurrent_test('arb_shader_image_load_store-early-z')
arb_shader_image_load_store['host-mem-barrier'] = concurrent_test('arb_shader_image_load_store-host-mem-barrier')
+arb_shader_image_load_store['indexing'] = concurrent_test('arb_shader_image_load_store-indexing')
profile.tests['hiz'] = hiz
profile.tests['fast_color_clear'] = fast_color_clear
diff --git a/tests/spec/arb_shader_image_load_store/CMakeLists.gl.txt b/tests/spec/arb_shader_image_load_store/CMakeLists.gl.txt
index 814a585..df89aa8 100644
--- a/tests/spec/arb_shader_image_load_store/CMakeLists.gl.txt
+++ b/tests/spec/arb_shader_image_load_store/CMakeLists.gl.txt
@@ -18,5 +18,6 @@ piglit_add_executable(arb_shader_image_load_store-coherency coherency.c ${depend
piglit_add_executable(arb_shader_image_load_store-dead-fragments dead-fragments.c ${depends})
piglit_add_executable(arb_shader_image_load_store-early-z early-z.c ${depends})
piglit_add_executable(arb_shader_image_load_store-host-mem-barrier host-mem-barrier.c ${depends})
+piglit_add_executable(arb_shader_image_load_store-indexing indexing.c ${depends})
# vim: ft=cmake:
diff --git a/tests/spec/arb_shader_image_load_store/indexing.c b/tests/spec/arb_shader_image_load_store/indexing.c
new file mode 100644
index 0000000..95e442e
--- /dev/null
+++ b/tests/spec/arb_shader_image_load_store/indexing.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (C) 2014 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 indexing.c
+ *
+ * Test that image array indexing gives the expected results. The
+ * original ARB_shader_image_load_store is rather vague in this
+ * regard, but the GLSL 4.2 specification states that:
+ *
+ * "When aggregated into arrays within a shader, images can only be
+ * indexed with a dynamically uniform integral expression, otherwise
+ * results are undefined."
+ *
+ * Which means that we can only check indexing with dynamically
+ * uniform expressions, i.e. expressions that are invariant for all
+ * shader invocations in which they are evaluated.
+ */
+
+#include "common.h"
+
+/** Window width. */
+#define W 16
+
+/** Window height. */
+#define H 96
+
+/** Total number of pixels in the window and images. */
+#define N (W * H)
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+config.supports_gl_core_version = 32;
+
+config.window_width = W;
+config.window_height = H;
+config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static bool
+init_images(const struct image_info img, GLuint prog)
+{
+ uint32_t pixels[H][W];
+ int i, j, unit;
+
+ for (unit = 0; unit < 8; ++unit) {
+ char *name = NULL;
+
+ for (i = 0; i < W; ++i)
+ for (j = 0; j < H; ++j)
+ pixels[j][i] = (i + j + unit) % 16;
+
+ if (!upload_image(img, unit, pixels[0]))
+ return false;
+
+ asprintf(&name, "imgs[%d]", unit);
+ set_uniform_int(prog, name, unit);
+ }
+
+ return true;
+}
+
+static bool
+check(const struct grid_info grid, unsigned u)
+{
+ uint32_t pixels[H][W];
+ uint32_t expect[H][W];
+ int i, j, unit;
+
+ for (i = 0; i < W; ++i) {
+ for (j = 0; j < H; ++j) {
+ if (i % 2 == j % 3) {
+ /* Discarded fragment. */
+ expect[j][i] =
+ encode(get_image_format(GL_R32F), 0.5);
+ } else {
+ /* Active fragment. */
+ unsigned x = 0;
+
+ for (unit = 0; unit < 8; ++unit)
+ x = (x << 4 |
+ ((i + j + (unit + u) % 8) % 16));
+
+ expect[j][i] = x;
+ }
+ }
+ }
+
+ return download_result(grid, pixels[0]) &&
+ check_pixels_v(image_info_for_grid(grid),
+ pixels[0], expect[0]);
+}
+
+/**
+ * Discard a number of fragments and then load elements from an array
+ * of images using dynamically uniform indices.
+ */
+static bool
+run_test(void)
+{
+ const struct grid_info grid =
+ grid_info(GL_FRAGMENT_SHADER, GL_R32UI, W, H);
+ const struct image_info img = image_info_for_grid(grid);
+ GLuint prog = generate_program(
+ grid, GL_FRAGMENT_SHADER,
+ concat(image_hunk(img, ""),
+ hunk("uniform int u;\n"
+ "uniform IMAGE_T imgs[8];\n"
+ "\n"
+ "GRID_T op(ivec2 idx, GRID_T x) {\n"
+ " int i;\n"
+ "\n"
+ " if (idx.x % 2 == idx.y % 3)\n"
+ " discard;\n"
+ "\n"
+ " for (i = 0; i < 8; ++i) {\n"
+ " x.x = (x.x << 4 |"
+ " imageLoad(imgs[(i + u) % 8],"
+ " IMAGE_ADDR(idx)).x);\n"
+ " }\n"
+ "\n"
+ " return x;\n"
+ "}\n"), NULL));
+ bool ret = prog &&
+ init_fb(grid) &&
+ init_images(img, prog) &&
+ set_uniform_int(prog, "u", 5) &&
+ draw_grid(grid, prog) &&
+ check(grid, 5);
+
+ glDeleteProgram(prog);
+ return ret;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+ enum piglit_result status = PIGLIT_PASS;
+
+ piglit_require_extension("GL_ARB_shader_image_load_store");
+
+ subtest(&status, true, run_test(),
+ "dynamically uniform indexing test");
+
+ piglit_report_result(status);
+}
+
+enum piglit_result
+piglit_display(void)
+{
+ return PIGLIT_FAIL;
+}
--
2.1.1
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