Point-sprite test

Draw point sprite with both possible coordinate origins and verify
that the correct colors show up in the correct places.

2 files changed, 191 insertions, 0 deletions

diff --git a/tests/bugs/CMakeLists.txt b/tests/bugs/CMakeLists.txt
index f944efe5b..cee1294d8 100644
--- a/tests/bugs/CMakeLists.txt
+++ b/tests/bugs/CMakeLists.txt
@@ -29,4 +29,5 @@ add_executable (fdo14575 fdo14575.c)
 add_executable (r300-readcache r300-readcache.c)
 add_executable (tex1d-2dborder tex1d-2dborder.c)
 add_executable (fdo20701 fdo20701.c)
+add_executable (point-sprite point-sprite.c)
 add_executable (fdo22540 fdo22540.c)
diff --git a/tests/bugs/point-sprite.c b/tests/bugs/point-sprite.c
new file mode 100644
index 000000000..0269315d9
--- /dev/null
+++ b/tests/bugs/point-sprite.c
@@ -0,0 +1,190 @@
+/*
+ * 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.
+ */
+
+/**
+ * This test draws a point sprite with a checkerboard texture and tests whether
+ * the correct colors were drawn using piglit_probe_pixel_rgb.
+ *
+ * \author Ben Holmes
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <GL/glew.h>
+#if defined(__APPLE__)
+#include <GLUT/glut.h>
+#else
+#include <GL/glut.h>
+#endif
+
+#include "piglit-util.h"
+
+static GLboolean Automatic = GL_FALSE;
+static float maxSize = 0.0f;
+static GLuint tex;
+
+static void
+Init(void)
+{
+	glewInit();
+	piglit_require_extension("GL_ARB_point_sprite");
+
+	glMatrixMode(GL_PROJECTION);
+	glLoadIdentity();
+	glOrtho(0, 400, 0, 300, -1, 1);
+
+	glMatrixMode(GL_MODELVIEW);
+	glLoadIdentity();
+
+	glEnable(GL_TEXTURE_2D);
+	glEnable(GL_POINT_SPRITE_ARB);
+
+	glGetFloatv(GL_POINT_SIZE_MAX, &maxSize);
+	if (maxSize > 100)
+		maxSize = 100;
+	glPointSize(maxSize);
+
+	glClearColor(0.2, 0.2, 0.2, 1.0);
+	glColor3f(1.0, 1.0, 1.0);
+
+}
+
+static void
+display(void)
+{
+	static const GLfloat black[3] = {0.0, 0.0, 0.0};
+	GLboolean pass;
+
+	glClear(GL_COLOR_BUFFER_BIT);
+	glBindTexture(GL_TEXTURE_2D, tex);
+
+
+	/* Make sure the point coordinate origin is set to the default location
+	 * of upper left.
+	 *
+	 * OpenGL version must be at least 2.0 to support modifying
+	 * GL_POINT_SPRITE_COORD_ORIGIN.
+	 */
+	if (GLEW_VERSION_2_0)
+		glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN, GL_UPPER_LEFT);
+
+	glBegin(GL_POINTS);
+	glVertex2f(10.0f + (maxSize / 2),
+		   10.0f + (maxSize / 2));
+	glEnd();
+
+	pass = piglit_probe_pixel_rgb(10.0f + (maxSize / 4),
+				      10.0f + (3 * maxSize / 4),
+				      black);
+
+
+	/* Set the point coordinate origin to the lower left and check that the
+	 * image is correctly flipped.
+	 *
+	 * OpenGL version must be at least 2.0 to support modifying
+	 * GL_POINT_SPRITE_COORD_ORIGIN.
+	 */
+	if (GLEW_VERSION_2_0) {
+		static const GLfloat white[3] = {1.0, 1.0, 1.0};
+
+
+		glPointParameteri(GL_POINT_SPRITE_COORD_ORIGIN, GL_LOWER_LEFT);
+
+		glBegin(GL_POINTS);
+		glVertex2f(20.0f + maxSize + (maxSize / 2),
+			   10.0f + (maxSize / 2));
+		glEnd();
+
+		pass = pass &&
+			piglit_probe_pixel_rgb(20.0f + maxSize + (maxSize / 4),
+					       10.0f + (3 * maxSize / 4),
+					       white);
+	}
+
+
+	if (Automatic)
+		piglit_report_result(pass ? PIGLIT_SUCCESS : PIGLIT_FAILURE);
+
+	glutSwapBuffers();
+}
+
+
+static void
+loadTex(void)
+{
+	const int height = 2;
+	const int width = 2;
+	int i, j;
+
+	GLfloat texData[width][height][4];
+	for (i = 0; i < width; i++) {
+		for (j = 0; j < height; j++) {
+			if ((i + j) & 1) {
+				/* white */
+				texData[i][j][0] = 1;
+				texData[i][j][1] = 1;
+				texData[i][j][2] = 1;
+				texData[i][j][3] = 1;
+			}
+			else {
+				/* black */
+				texData[i][j][0] = 0;
+				texData[i][j][1] = 0;
+				texData[i][j][2] = 0;
+				texData[i][j][3] = 0;
+			}
+		}
+	}
+
+
+	glGenTextures(1, &tex);
+	glBindTexture(GL_TEXTURE_2D, tex);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
+	glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
+	glTexEnvi(GL_POINT_SPRITE, GL_COORD_REPLACE, GL_TRUE);
+	glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, width, height, 0, GL_RGBA,
+		     GL_FLOAT, texData);
+}
+
+int main(int argc, char **argv)
+{
+	glutInit(&argc, argv);
+	if(argc==2 && !strncmp(argv[1],"-auto",5))
+		Automatic = GL_TRUE;
+	glutInitDisplayMode(GLUT_DOUBLE | GLUT_RGB);
+	glutInitWindowSize(400, 300);
+	glutCreateWindow("point_sprite");
+	glutDisplayFunc(display);
+	glutKeyboardFunc(piglit_escape_exit_key);
+
+	Init();
+
+	loadTex();
+
+	glutMainLoop();
+
+	return 0;
+}