[Piglit] [PATCH 2/3] ext_transform_feeback: use default window size for position test

[Brian Paul]

This test also has hard-coded expected[] coords which assume a 64 x 32
window size.  New use the default window size but setup the projection
matrix and viewport as if the window was only 64 x 32.
---
 tests/spec/ext_transform_feedback/position.c |   16 ++++++++++++----
 1 file changed, 12 insertions(+), 4 deletions(-)

diff --git a/tests/spec/ext_transform_feedback/position.c b/tests/spec/ext_transform_feedback/position.c
index 25c01dc..e278f7f 100644
--- a/tests/spec/ext_transform_feedback/position.c
+++ b/tests/spec/ext_transform_feedback/position.c
@@ -33,9 +33,6 @@
 PIGLIT_GL_TEST_CONFIG_BEGIN
 
 	config.supports_gl_compat_version = 10;
-
-	config.window_width = 64;
-	config.window_height = 32;
 	config.window_visual = PIGLIT_GL_VISUAL_DOUBLE | PIGLIT_GL_VISUAL_RGBA;
 
 PIGLIT_GL_TEST_CONFIG_END
@@ -204,8 +201,19 @@ enum piglit_result piglit_display(void)
 		break;
 	}
 
-	/* Render into TFBO. */
+	/* Setup projection for a 64 x 32 window region.  That's what
+	 * the expected coords above assume.
+	 * XXX it would be better if the position coords in the above
+	 * array were compute instead of fixed.
+	 */
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(0, 64, 0, 32, -1, 1);
+	glMatrixMode(GL_MODELVIEW);
 	glLoadIdentity();
+        glViewport(0, 0, 64, 32);
+
+	/* Render into TFBO. */
 	glUseProgram(prog);
 	if (discard)
 		glEnable(GL_RASTERIZER_DISCARD_EXT);
-- 
1.7.10.4