scissor-clear: New test for regression in Intel DRI1 cleanup.

Bug #26290

1 files changed, 93 insertions, 0 deletions

diff --git a/tests/general/scissor-clear.c b/tests/general/scissor-clear.c
new file mode 100644
index 000000000..9d53aebeb
--- /dev/null
+++ b/tests/general/scissor-clear.c
@@ -0,0 +1,93 @@
+/*
+ * Copyright © 2009 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.
+ *
+ * Authors:
+ *    Eric Anholt <eric@anholt.net>
+ *
+ */
+
+/** @file scissor-clear.c
+ *
+ * Tests that glScissor properly affects glClear(GL_COLOR_BUFFER_BIT)().
+ */
+
+#include "piglit-util.h"
+
+int piglit_width = 100, piglit_height = 100;
+int piglit_window_mode = GLUT_DOUBLE | GLUT_RGB;
+
+enum piglit_result
+piglit_display(void)
+{
+	GLboolean pass = GL_TRUE;
+	int x, y;
+	static float green[] = {0.0, 1.0, 0.0, 0.0};
+	static float blue[]  = {0.0, 0.0, 1.0, 0.0};
+
+	/* whole window green. */
+	glClearColor(0.0, 1.0, 0.0, 0.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	/* Clear depth quad at 10, 10 to be drawn blue. */
+	glEnable(GL_SCISSOR_TEST);
+	glScissor(10, 10, 10, 10);
+	glClearColor(0.0, 0.0, 1.0, 0.0);
+	glClear(GL_COLOR_BUFFER_BIT);
+
+	for (y = 0; y < piglit_height; y++) {
+		for (x = 0; x < piglit_width; x++) {
+			float *expected;
+
+			if (x >= 10 && x < 20 && y >= 10 && y < 20)
+				expected = blue;
+			else
+				expected = green;
+
+			pass &= piglit_probe_pixel_rgb(x, y, expected);
+		}
+	}
+
+	glutSwapBuffers();
+
+	return pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE;
+}
+
+
+static void reshape(int width, int height)
+{
+	piglit_width = width;
+	piglit_height = height;
+
+	glViewport(0, 0, width, height);
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+
+	glOrtho(0.0, width, 0.0, height, -1.0, 1.0);
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+}
+
+void
+piglit_init(int argc, char **argv)
+{
+	reshape(piglit_width, piglit_height);
+}