From: Nicolai Hähnle <[email protected]>

v2: also add a test where the vbuf is stored outside the committed
    region

Reviewed-by: Alejandro Piñeiro <[email protected]> (v1)
---
 tests/all.py                                   |   1 +
 tests/spec/arb_sparse_buffer/CMakeLists.gl.txt |   1 +
 tests/spec/arb_sparse_buffer/basic.c           | 199 +++++++++++++++++++++++++
 3 files changed, 201 insertions(+)
 create mode 100644 tests/spec/arb_sparse_buffer/basic.c

diff --git a/tests/all.py b/tests/all.py
index 9cc2b9d..89e9ad4 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -4396,20 +4396,21 @@ with profile.test_list.group_manager(
     g(['arb_shader_storage_buffer_object-max-ssbo-size', 'vs'], 'vs')
     g(['arb_shader_storage_buffer_object-max-ssbo-size', 'vsexceed'],
       'vsexceed')
     g(['arb_shader_storage_buffer_object-max-ssbo-size', 'fs'], 'fs')
     g(['arb_shader_storage_buffer_object-max-ssbo-size', 'fsexceed'],
       'fsexceed')
 
 with profile.test_list.group_manager(
         PiglitGLTest,
         grouptools.join('spec', 'arb_sparse_buffer')) as g:
+    g(['arb_sparse_buffer-basic'], 'basic')
     g(['arb_sparse_buffer-minmax'], 'minmax')
 
 with profile.test_list.group_manager(
         PiglitGLTest,
         grouptools.join('spec', 'ext_polygon_offset_clamp')) as g:
     g(['ext_polygon_offset_clamp-draw'])
     g(['ext_polygon_offset_clamp-draw_gles2'])
     g(['ext_polygon_offset_clamp-dlist'])
 
 with profile.test_list.group_manager(
diff --git a/tests/spec/arb_sparse_buffer/CMakeLists.gl.txt 
b/tests/spec/arb_sparse_buffer/CMakeLists.gl.txt
index 3490ba7..affbdf6 100644
--- a/tests/spec/arb_sparse_buffer/CMakeLists.gl.txt
+++ b/tests/spec/arb_sparse_buffer/CMakeLists.gl.txt
@@ -2,11 +2,12 @@ include_directories(
        ${GLEXT_INCLUDE_DIR}
        ${OPENGL_INCLUDE_PATH}
        ${piglit_SOURCE_DIR}/tests/util
 )
 
 link_libraries (
        piglitutil_${piglit_target_api}
        ${OPENGL_gl_LIBRARY}
 )
 
+piglit_add_executable (arb_sparse_buffer-basic basic.c)
 piglit_add_executable (arb_sparse_buffer-minmax minmax.c)
diff --git a/tests/spec/arb_sparse_buffer/basic.c 
b/tests/spec/arb_sparse_buffer/basic.c
new file mode 100644
index 0000000..e181f24
--- /dev/null
+++ b/tests/spec/arb_sparse_buffer/basic.c
@@ -0,0 +1,199 @@
+/*
+ * Copyright (c) 2017 Advanced Micro Devices, 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
+ *
+ * Draw a colored quad from a vertex buffer residing in a sparse buffer.
+ */
+
+#include "piglit-util-gl.h"
+
+#include <inttypes.h>
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+       config.supports_gl_compat_version = 33;
+       config.supports_gl_core_version = 33;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+#define BUFFER_OFFSET(i) ((char *)NULL + (i))
+
+static const char vs_source[] =
+"#version 130\n"
+"\n"
+"in vec4 pos;\n"
+"in vec4 color;\n"
+"\n"
+"out vec4 fs_color;\n"
+"\n"
+"void main() {\n"
+"   gl_Position = pos;\n"
+"   fs_color = color;\n"
+"}\n";
+
+static const char fs_source[] =
+"#version 130\n"
+"\n"
+"in vec4 fs_color;\n"
+"\n"
+"out vec4 out_color;\n"
+"\n"
+"void main() {\n"
+"   out_color = fs_color;\n"
+"}\n";
+
+/* Interleaved position and color data. */
+static const float vb_data[] = {
+       -1.0, -1.0, 0.0, 1.0,   0.5, 1.0, 0.0, 1.0,
+       -1.0,  1.0, 0.0, 1.0,   0.5, 1.0, 0.0, 1.0,
+        1.0, -1.0, 0.0, 1.0,   0.5, 1.0, 0.0, 1.0,
+        1.0,  1.0, 0.0, 1.0,   0.5, 1.0, 0.0, 1.0,
+};
+
+static int sparse_buffer_page_size;
+static GLuint program;
+
+
+static bool
+do_run_one(uint64_t buffer_size, uint64_t commit_offset, uint64_t commit_size,
+          uint64_t vbuf_offset, bool vbuf_committed)
+{
+       GLuint buf;
+       GLuint vao;
+
+       /* Setup buffer commitment and data. */
+       glGenBuffers(1, &buf);
+       glBindBuffer(GL_ARRAY_BUFFER, buf);
+
+       glBufferStorage(GL_ARRAY_BUFFER, buffer_size, NULL,
+                       GL_DYNAMIC_STORAGE_BIT | GL_SPARSE_STORAGE_BIT_ARB);
+
+       glBufferPageCommitmentARB(GL_ARRAY_BUFFER, commit_offset, commit_size, 
true);
+
+       glBufferSubData(GL_ARRAY_BUFFER, vbuf_offset, sizeof(vb_data), vb_data);
+
+       if (!piglit_check_gl_error(GL_NO_ERROR))
+               return false;
+
+       /* Clear to red. */
+       glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
+       glClear(GL_COLOR_BUFFER_BIT);
+
+       /* Draw. */
+       glUseProgram(program);
+
+       glGenVertexArrays(1, &vao);
+       glBindVertexArray(vao);
+
+       glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 8,
+                             BUFFER_OFFSET(vbuf_offset));
+       glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, sizeof(float) * 8,
+                             BUFFER_OFFSET(vbuf_offset + sizeof(float) * 4));
+       glEnableVertexAttribArray(0);
+       glEnableVertexAttribArray(1);
+
+       glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+
+       glDeleteVertexArrays(1, &vao);
+       glDeleteBuffers(1, &buf);
+
+       if (!piglit_check_gl_error(GL_NO_ERROR))
+               return false;
+
+       /* Check that the result looks good. There's not really anything we can
+        * check if the right memory wasn't committed.
+        */
+       if (vbuf_committed &&
+           !piglit_probe_rect_rgba(0, 0, piglit_width, piglit_height,
+                                   &vb_data[4]))
+               return false;
+
+       return true;
+}
+
+static bool
+run_one(uint64_t buffer_size, uint64_t commit_offset, uint64_t commit_size,
+       uint64_t vbuf_offset, bool vbuf_committed)
+{
+       bool pass = do_run_one(buffer_size, commit_offset, commit_size,
+                              vbuf_offset, vbuf_committed);
+
+       if (!pass) {
+               printf("Previous error with:\n"
+                      "    buffer_size = %"PRIu64"\n"
+                      "    commit_offset = %"PRIu64"\n"
+                      "    commit_size = %"PRIu64"\n"
+                      "    vbuf_offset = %"PRIu64"\n",
+                      buffer_size, commit_offset, commit_size, vbuf_offset);
+       }
+
+       return pass;
+}
+
+enum piglit_result
+piglit_display(void)
+{
+       bool pass = true;
+       uint64_t buffer_size;
+       uint64_t commit_offset;
+
+       /* The spec doesn't require this, but in practice it'd be surprising
+        * to see tiny page sizes, so let's not worry about the possibility.
+        */
+       assert(sparse_buffer_page_size / 2 > sizeof(vb_data));
+
+       buffer_size = sparse_buffer_page_size / 2;
+       pass = run_one(buffer_size, 0, buffer_size, 0, true) && pass;
+
+       buffer_size = 75 * sparse_buffer_page_size;
+       pass = run_one(buffer_size, 12 * sparse_buffer_page_size,
+                      sparse_buffer_page_size, 12 * sparse_buffer_page_size, 
true) && pass;
+
+       commit_offset = 1llu * 1024 * 1024 * 1024;
+       buffer_size = commit_offset + sparse_buffer_page_size / 2;
+       pass = run_one(buffer_size, commit_offset, sparse_buffer_page_size / 2,
+                      buffer_size - sizeof(vb_data), true) && pass;
+
+       buffer_size = 10 * sparse_buffer_page_size;
+       pass = run_one(buffer_size, sparse_buffer_page_size, 9 * 
sparse_buffer_page_size,
+                      0, false) && pass;
+
+       return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+       piglit_require_extension("GL_ARB_sparse_buffer");
+
+       glGetIntegerv(GL_SPARSE_BUFFER_PAGE_SIZE_ARB, &sparse_buffer_page_size);
+
+       program = piglit_build_simple_program_unlinked(vs_source, fs_source);
+       glBindAttribLocation(program, 0, "pos");
+       glBindAttribLocation(program, 1, "color");
+       glLinkProgram(program);
+
+       if (!piglit_link_check_status(program))
+               piglit_report_result(PIGLIT_FAIL);
+}
-- 
2.9.3

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