gl-1.0-dlist-shademodel: test glShadeModel() inside a display list

This is pretty trivial, but it's useful for debugging a Mesa display
list optimization.

Reviewed-by: Jose Fonseca <jfonseca@vmware.com>

2 files changed, 102 insertions, 0 deletions

diff --git a/tests/spec/gl-1.0/CMakeLists.gl.txt b/tests/spec/gl-1.0/CMakeLists.gl.txt
index 2f819fa84..559fabc32 100644
--- a/tests/spec/gl-1.0/CMakeLists.gl.txt
+++ b/tests/spec/gl-1.0/CMakeLists.gl.txt
@@ -12,5 +12,6 @@ link_libraries (
 piglit_add_executable (gl-1.0-beginend-coverage beginend-coverage.c)
 piglit_add_executable (gl-1.0-edgeflag edgeflag.c)
 piglit_add_executable (gl-1.0-edgeflag-quads edgeflag-quads.c)
+piglit_add_executable (gl-1.0-dlist-shademodel dlist-shademodel.c)
 
 # vim: ft=cmake:
diff --git a/tests/spec/gl-1.0/dlist-shademodel.c b/tests/spec/gl-1.0/dlist-shademodel.c
new file mode 100644
index 000000000..0b7752ed1
--- /dev/null
+++ b/tests/spec/gl-1.0/dlist-shademodel.c
@@ -0,0 +1,101 @@
+/*
+ * Copyright (C) 2013 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.
+ */
+
+/**
+ * Test glShadeModel in a display list.
+ * This is pretty trivial and shouldn't fail with any decent OpenGL,
+ * but it's useful for checking an optimization in Mesa's display list
+ * compiler.
+ */
+
+#include "piglit-util-gl-common.h"
+
+
+PIGLIT_GL_TEST_CONFIG_BEGIN
+	config.supports_gl_compat_version = 10;
+	config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
+PIGLIT_GL_TEST_CONFIG_END
+
+
+static const GLfloat red[] = {1.0, 0.0, 0.0};
+static const GLfloat green[] = {0.0, 1.0, 0.0};
+
+
+enum piglit_result
+piglit_display(void)
+{
+	GLuint list;
+	bool pass;
+
+	list = glGenLists(1);
+	glNewList(list, GL_COMPILE);
+	glShadeModel(GL_FLAT);
+
+	glBegin(GL_QUADS);
+	glColor3fv(red);
+	glVertex2f(-1, -1);
+	glColor3fv(green);
+	glVertex2f( 0, -1);
+	glColor3fv(red);
+	glVertex2f( 0, 1);
+	glColor3fv(green);
+	glVertex2f(-1, 1);
+	glEnd();
+
+	/* Mesa should be able to optimize this away so that
+	 * the two GL_QUADS primitives get combined into one batch.
+	 */
+	glShadeModel(GL_FLAT);
+
+	glBegin(GL_QUADS);
+	glColor3fv(red);
+	glVertex2f(0, -1);
+	glColor3fv(green);
+	glVertex2f(1, -1);
+	glColor3fv(red);
+	glVertex2f(1, 1);
+	glColor3fv(green);
+	glVertex2f(0, 1);
+	glEnd();
+
+	glEndList();
+
+	glShadeModel(GL_SMOOTH);
+	glClear(GL_COLOR_BUFFER_BIT);
+	glCallList(list);
+
+	glDeleteLists(list, 1);
+
+	pass = piglit_probe_pixel_rgb(20, 20, green);
+
+	piglit_present_results();
+
+	return pass ? PIGLIT_PASS : PIGLIT_FAIL;
+}
+
+
+void
+piglit_init(int argc, char **argv)
+{
+	/* nothing */
+}