gl-3.0: Verify gl_VertexID when used with glMultiDrawArrays

OpenGL expects the gl_VertexID to start counting with the 'start' value
of each individual DrawArrays.

This test passes on NVIDIA (331.89 on GTX 260).

NOTE: This test currently fails on the i965 driver.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80247

3 files changed, 176 insertions, 0 deletions

diff --git a/tests/all.py b/tests/all.py
index 616b67c2e..a1f652c74 100644
--- a/tests/all.py
+++ b/tests/all.py
@@ -894,6 +894,7 @@ add_concurrent_test(gl30, 'clearbuffer-stencil')
 add_concurrent_test(gl30, 'genmipmap-errors')
 add_concurrent_test(gl30, 'getfragdatalocation')
 add_concurrent_test(gl30, 'integer-errors')
+gl30['gl_VertexID used with glMultiDrawArrays'] = concurrent_test('gl-3.0-multidrawarrays-vertexid')
 gl30['minmax'] = concurrent_test('gl-3.0-minmax')
 gl30['render-integer'] = concurrent_test('gl-3.0-render-integer')
 gl30['required-sized-texture-formats'] = concurrent_test('gl-3.0-required-sized-texture-formats 30')
diff --git a/tests/spec/gl-3.0/CMakeLists.gl.txt b/tests/spec/gl-3.0/CMakeLists.gl.txt
index a802da312..c3e6a2851 100644
--- a/tests/spec/gl-3.0/CMakeLists.gl.txt
+++ b/tests/spec/gl-3.0/CMakeLists.gl.txt
@@ -10,6 +10,7 @@ link_libraries (
 )
 
 piglit_add_executable (gl-3.0-bound-resource-limits bound-resource-limits.c)
+piglit_add_executable (gl-3.0-multidrawarrays-vertexid multidrawarrays-vertexid.c)
 piglit_add_executable (gl-3.0-minmax minmax.c)
 piglit_add_executable (gl-3.0-render-integer render-integer.c)
 piglit_add_executable (gl-3.0-required-sized-texture-formats required-sized-texture-formats.c)
diff --git a/tests/spec/gl-3.0/multidrawarrays-vertexid.c b/tests/spec/gl-3.0/multidrawarrays-vertexid.c
new file mode 100644
index 000000000..b9f1419d8
--- /dev/null
+++ b/tests/spec/gl-3.0/multidrawarrays-vertexid.c
@@ -0,0 +1,174 @@
+/* Copyright © 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 multidrawarrays-vertexid.c
+ * Test using gl_VertexID in conjunction with glMultiDrawArrays
+ *
+ * The value of gl_VertexID observed in the shader should start with the value
+ * of 'first' and increment from there.
+ */
+
+#include "piglit-util-gl-common.h"
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+
+	config.supports_gl_compat_version = 30;
+	config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
+
+PIGLIT_GL_TEST_CONFIG_END
+
+static const float green[]   = { 0, 1, 0, 1 };
+static const float blue[]    = { 0, 0, 1, 1 };
+static const float gold[]    = { 1, 1, 0, 1 };
+static const float magenta[] = { 1, 0, 1, 1 };
+
+enum piglit_result
+piglit_display(void)
+{
+	bool pass = true;
+	static const GLint first[] = { 4, 8, 12, 16 };
+	static const GLsizei count[ARRAY_SIZE(first)] = { 4, 4, 4, 4 };
+
+	glViewport(0, 0, piglit_width, piglit_height);
+	glClearColor(0.2, 0.2, 0.2, 0.2);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	glMultiDrawArrays(GL_TRIANGLE_FAN,
+			  first,
+			  count,
+			  ARRAY_SIZE(count));
+
+	pass = piglit_probe_rect_rgba(0, 0,
+				      piglit_width / 2, piglit_height /2,
+				      green)
+		&& pass;
+	pass = piglit_probe_rect_rgba(piglit_width / 2, 0,
+				      piglit_width / 2, piglit_height / 2,
+				      blue)
+		&& pass;
+	pass = piglit_probe_rect_rgba(0, piglit_height /2,
+				      piglit_width / 2, piglit_height / 2,
+				      gold)
+		&& pass;
+	pass = piglit_probe_rect_rgba(piglit_width / 2, piglit_height /2,
+				      piglit_width / 2, piglit_height / 2,
+				      magenta)
+		&& pass;
+
+	piglit_present_results();
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	static const GLfloat verts[] = {
+		/* These vertices should never be accessed due to the way
+		 * glMultiDrawArrays is called.
+		 */
+		-1.0, -1.0,
+		 1.0, -1.0,
+		 1.0,  1.0,
+		-1.0,  1.0,
+
+		-1.0, -1.0,
+		 0.0, -1.0,
+		 0.0,  0.0,
+		-1.0,  0.0,
+
+		 0.0, -1.0,
+		 1.0, -1.0,
+		 1.0,  0.0,
+		 0.0,  0.0,
+
+		-1.0,  0.0,
+		 0.0,  0.0,
+		 0.0,  1.0,
+		-1.0,  1.0,
+
+		 0.0,  0.0,
+		 1.0,  0.0,
+		 1.0,  1.0,
+		 0.0,  1.0,
+	};
+
+	GLuint prog = piglit_build_simple_program(
+		"#version 130\n"
+		"\n"
+		"in vec4 piglit_vertex;\n"
+		"out vec3 c;\n"
+		"\n"
+		"const vec3 colors[] = vec3[](\n"
+		"	vec3(1, 0, 0),\n"
+		"	vec3(1, 0, 0),\n"
+		"	vec3(1, 0, 0),\n"
+		"	vec3(1, 0, 0),\n"
+		"\n"
+		"	vec3(0, 1, 0),\n"
+		"	vec3(0, 1, 0),\n"
+		"	vec3(0, 1, 0),\n"
+		"	vec3(0, 1, 0),\n"
+		"\n"
+		"	vec3(0, 0, 1),\n"
+		"	vec3(0, 0, 1),\n"
+		"	vec3(0, 0, 1),\n"
+		"	vec3(0, 0, 1),\n"
+		"\n"
+		"	vec3(1, 1, 0),\n"
+		"	vec3(1, 1, 0),\n"
+		"	vec3(1, 1, 0),\n"
+		"	vec3(1, 1, 0),\n"
+		"\n"
+		"	vec3(1, 0, 1),\n"
+		"	vec3(1, 0, 1),\n"
+		"	vec3(1, 0, 1),\n"
+		"	vec3(1, 0, 1)\n"
+		");\n"
+		"void main() {\n"
+		"       c = colors[gl_VertexID];\n"
+		"	gl_Position = piglit_vertex;\n"
+		"}\n",
+
+		"#version 130\n"
+		"in vec3 c;\n"
+		"\n"
+		"void main() {\n"
+		"	gl_FragColor = vec4(c, 1);\n"
+		"}\n");
+
+	GLuint vao;
+	GLuint buf;
+
+	glUseProgram(prog);
+
+	glGenVertexArrays(1, &vao);
+	glBindVertexArray(vao);
+
+	glGenBuffers(1, &buf);
+	glBindBuffer(GL_ARRAY_BUFFER, buf);
+	glBufferData(GL_ARRAY_BUFFER, sizeof(verts), verts,
+		     GL_STATIC_DRAW);
+
+	glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 0, (void *) 0);
+	glEnableVertexAttribArray(0);
+}