commit 5dc4db0c84420eae6871b385ab93917a7e938c9e
Author: Alexander Sabourenkov <screwdriver@lxnt.info>
Date:   Wed Nov 2 05:02:30 2011 +0400

    add glsl-pointvarying test

diff --git a/tests/all.tests b/tests/all.tests
index 4648507..e189c2e 100644
--- a/tests/all.tests
+++ b/tests/all.tests
@@ -378,6 +378,7 @@ add_plain_test(shaders, 'getuniform-02')
 add_plain_test(shaders, 'glsl-invalid-asm-01')
 add_plain_test(shaders, 'glsl-invalid-asm-02')
 add_plain_test(shaders, 'glsl-novertexdata')
+add_plain_test(shaders, 'glsl-pointvarying')
 add_plain_test(shaders, 'glsl-preprocessor-comments')
 add_plain_test(shaders, 'glsl-reload-source')
 add_plain_test(shaders, 'glsl-uniform-out-of-bounds')
diff --git a/tests/shaders/CMakeLists.gl.txt b/tests/shaders/CMakeLists.gl.txt
index 175458c..cb19cf5 100644
--- a/tests/shaders/CMakeLists.gl.txt
+++ b/tests/shaders/CMakeLists.gl.txt
@@ -65,6 +65,7 @@ add_executable (getuniform-02 getuniform-02.c)
 add_executable (glsl-invalid-asm-01 glsl-invalid-asm-01.c)
 add_executable (glsl-invalid-asm-02 glsl-invalid-asm-02.c)
 add_executable (glsl-novertexdata glsl-novertexdata.c)
+add_executable (glsl-pointvarying glsl-pointvarying.c)
 add_executable (glsl-orangebook-ch06-bump glsl-orangebook-ch06-bump.c)
 add_executable (glsl-reload-source glsl-reload-source.c)
 add_executable (glsl-unused-varying glsl-unused-varying.c)
diff --git a/tests/shaders/glsl-pointvarying.c b/tests/shaders/glsl-pointvarying.c
new file mode 100644
index 0000000..f330bea
--- /dev/null
+++ b/tests/shaders/glsl-pointvarying.c
@@ -0,0 +1,123 @@
+/*
+ * Copyright © 2009 Intel Corporation
+ * Copyright © 2010 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 glsl-pointvarying.c
+ *
+ * Test if we can reliably pass colors via varyings between shaders.
+ *
+ * This test is based on the glsl-novertexdata.c test written
+ * by Ian.
+ *
+ * \author Ian Romanick <ian.d.romanick@intel.com>
+ * \author Brian Paul
+ * \author Alexander Sabourenkov
+ */
+
+#include "piglit-util.h"
+#include "piglit-framework.h"
+
+int piglit_window_mode = GLUT_RGB | GLUT_DOUBLE;
+int piglit_width = 100;
+int piglit_height = 100;
+
+static const GLchar *vertShaderText =
+	"attribute vec4 attrib;\n"
+	"varying float comp;\n"
+	"void main()\n"
+	"{\n"
+	"	comp = 1.0;\n"
+	"	gl_Position = vec4(0.0, 0.0, 0.0, 1.0);\n"
+	"} \n";
+	
+static const GLchar *fragShaderText =
+	"varying float comp;\n"
+	"void main()\n"
+	"{\n"
+	"	gl_FragColor = vec4(comp, 0.0, comp, 1.0);\n"
+	"} \n";
+
+enum piglit_result
+piglit_display(void)
+{
+	static const GLfloat expColor[4] = {0, 1, 0, 1};
+	GLint vs, fs;
+	GLint prog;
+	GLint stat;
+	enum piglit_result result;
+
+	vs = glCreateShader(GL_VERTEX_SHADER);
+	glShaderSource(vs, 1, &vertShaderText, NULL);
+
+	glCompileShader(vs);
+	glGetShaderiv(vs, GL_COMPILE_STATUS, &stat);
+	if (!stat) {
+                printf("glsl-pointvarying:  error compiling vertex shader!\n");
+                exit(1);
+        }
+
+	fs = glCreateShader(GL_FRAGMENT_SHADER);
+	glShaderSource(vs, 1, &fragShaderText, NULL);
+
+	glCompileShader(fs);
+	glGetShaderiv(fs, GL_COMPILE_STATUS, &stat);
+	if (!stat) {
+                printf("glsl-pointvarying:  error compiling fragment shader!\n");
+                exit(1);
+        }
+	
+	prog = glCreateProgram();
+	glAttachShader(prog, vs);
+	glAttachShader(prog, fs);
+	glLinkProgram(prog);
+	glUseProgram(prog);
+
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0);
+
+	glClear(GL_COLOR_BUFFER_BIT);
+
+        glPointSize(20.0);
+	glDrawArrays(GL_POINTS, 0, 1);
+
+	result = piglit_probe_pixel_rgba(piglit_width /2, piglit_height / 2,
+                                         expColor)
+		? PIGLIT_PASS : PIGLIT_FAIL;
+
+	glutSwapBuffers();
+
+	return result;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+	if (!GLEW_VERSION_2_0) {
+		printf("Requires OpenGL 2.0\n");
+		piglit_report_result(PIGLIT_SKIP);
+		exit(1);
+	}
+}