[Piglit] [PATCH] arb_texture_buffer_object/indexed: test indexed samplers with tbo

[sroland at vmware.com]

From: Roland Scheidegger <sroland at vmware.com>

This just verifies that sampler arrays indexed with a uniform work with TBOs.
(Broken on r600 evergreen pending a fix.)

v2: fix compiler warnings, directly assign index uniform in shader
---
 tests/all.py                                       |   1 +
 .../arb_texture_buffer_object/CMakeLists.gl.txt    |   1 +
 tests/spec/arb_texture_buffer_object/indexed.c     | 110 +++++++++++++++++++++
 3 files changed, 112 insertions(+)
 create mode 100644 tests/spec/arb_texture_buffer_object/indexed.c

diff --git a/tests/all.py b/tests/all.py
index ac1947ca4..0a1a65ef4 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -2483,6 +2483,7 @@ with profile.test_list.group_manager(
     g(['arb_texture_buffer_object-subdata-sync'], 'subdata-sync')
     g(['arb_texture_buffer_object-unused-name'], 'unused-name')
     g(['arb_texture_buffer_object-render-no-bo'], 'render-no-bo')
+    g(['arb_texture_buffer_object-indexed'], 'indexed')
 
 with profile.test_list.group_manager(
         PiglitGLTest,
diff --git a/tests/spec/arb_texture_buffer_object/CMakeLists.gl.txt b/tests/spec/arb_texture_buffer_object/CMakeLists.gl.txt
index ec0d0b463..959ca0c2f 100644
--- a/tests/spec/arb_texture_buffer_object/CMakeLists.gl.txt
+++ b/tests/spec/arb_texture_buffer_object/CMakeLists.gl.txt
@@ -24,3 +24,4 @@ piglit_add_executable (arb_texture_buffer_object-render-no-bo render-no-bo.c)
 piglit_add_executable (arb_texture_buffer_object-subdata-sync subdata-sync.c)
 piglit_add_executable (arb_texture_buffer_object-unused-name unused-name.c)
 piglit_add_executable (arb_texture_buffer_object-fetch-outside-bounds fetch-outside-bounds.c)
+piglit_add_executable (arb_texture_buffer_object-indexed indexed.c)
diff --git a/tests/spec/arb_texture_buffer_object/indexed.c b/tests/spec/arb_texture_buffer_object/indexed.c
new file mode 100644
index 000000000..e62c246f3
--- /dev/null
+++ b/tests/spec/arb_texture_buffer_object/indexed.c
@@ -0,0 +1,110 @@
+/* Copyright © 2015 Ilia Mirkin
+ * Copyright © 2017 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.
+ */
+
+/** @file indexed.c
+ *
+ * Tests that we can sample texture buffers with sampler indexing.
+ */
+
+#include "piglit-util-gl.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+	config.supports_gl_core_version = 32;
+	config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
+	config.khr_no_error_support = PIGLIT_NO_ERRORS;
+PIGLIT_GL_TEST_CONFIG_END
+
+enum piglit_result
+piglit_display(void)
+{
+	static const float green[4] = {0, 1, 0, 0};
+	bool pass;
+
+	glViewport(0, 0, piglit_width, piglit_height);
+	glClearColor(0.2, 0.2, 0.2, 0.2);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	piglit_draw_rect(-1, -1, 2, 2);
+
+	pass = piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height, green);
+
+	piglit_present_results();
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	static const char *vs_source =
+		"#version 150\n"
+		"in vec4 piglit_vertex;\n"
+		"void main()\n"
+		"{\n"
+		"	gl_Position = piglit_vertex;\n"
+		"}\n";
+
+	static const char *fs_source =
+		"#version 150\n"
+		"#extension GL_ARB_gpu_shader5: require\n"
+		"uniform samplerBuffer s[2];\n"
+		"uniform int offset;\n"
+		"uniform int index = 1;\n"
+		"void main()\n"
+		"{\n"
+		"	gl_FragColor = texelFetch(s[index], offset);\n"
+		"}\n";
+
+	GLuint tex[2], tbo[2];
+	GLint indices[2] = { 0, 1 };
+	static const uint8_t datag[4] = {0x00, 0xff, 0x00, 0x00};
+	static const uint8_t datar[4] = {0xff, 0x00, 0x00, 0x00};
+	GLuint prog;
+	GLint size = 4;
+	piglit_require_extension("GL_ARB_gpu_shader5");
+
+	prog = piglit_build_simple_program(vs_source, fs_source);
+	glUseProgram(prog);
+
+	glGenBuffers(2, tbo);
+	glGenTextures(2, tex);
+	glBindBuffer(GL_TEXTURE_BUFFER, tbo[0]);
+	glBindTexture(GL_TEXTURE_BUFFER, tex[0]);
+	glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA8, tbo[0]);
+	glBufferData(GL_TEXTURE_BUFFER,
+		     size * sizeof(datar), NULL, GL_STATIC_READ);
+	glBufferSubData(GL_TEXTURE_BUFFER,
+			(size - 1) * sizeof(datar), sizeof(datar), datar);
+
+	glActiveTexture(GL_TEXTURE1);
+	glBindBuffer(GL_TEXTURE_BUFFER, tbo[1]);
+	glBindTexture(GL_TEXTURE_BUFFER, tex[1]);
+	glTexBuffer(GL_TEXTURE_BUFFER, GL_RGBA8, tbo[1]);
+	glBufferData(GL_TEXTURE_BUFFER,
+		     size * sizeof(datag), NULL, GL_STATIC_READ);
+	glBufferSubData(GL_TEXTURE_BUFFER,
+			(size - 1) * sizeof(datag), sizeof(datag), datag);
+
+	glUniform1i(glGetUniformLocation(prog, "offset"), size - 1);
+	glUniform1iv(glGetUniformLocation(prog, "s"), 2, indices);
+}
-- 
2.12.3