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authorBrian <brian@i915.localnet.net>2008-02-25 16:26:37 -0700
committerBrian <brian@i915.localnet.net>2008-02-25 16:26:37 -0700
commitbc3f2c908e085538ed0956159503e97825161bb9 (patch)
treeba86b3ca67ff67fe38df07d83679733a4503aee9 /progs
parent09ba1dd4ccb0ed907510cb9403b1fb1fb0ab3658 (diff)
Added line smooth test
Diffstat (limited to 'progs')
-rw-r--r--progs/trivial/Makefile1
-rw-r--r--progs/trivial/line-smooth.c172
2 files changed, 173 insertions, 0 deletions
diff --git a/progs/trivial/Makefile b/progs/trivial/Makefile
index d19abe7e86..8bc6ad4e38 100644
--- a/progs/trivial/Makefile
+++ b/progs/trivial/Makefile
@@ -25,6 +25,7 @@ SOURCES = \
fs-tri.c \
line-clip.c \
line-cull.c \
+ line-smooth.c \
line-stipple-wide.c \
line-userclip-clip.c \
line-userclip-nop-clip.c \
diff --git a/progs/trivial/line-smooth.c b/progs/trivial/line-smooth.c
new file mode 100644
index 0000000000..f030de9b9f
--- /dev/null
+++ b/progs/trivial/line-smooth.c
@@ -0,0 +1,172 @@
+/*
+ * Copyright (c) 1991, 1992, 1993 Silicon Graphics, Inc.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and
+ * its documentation for any purpose is hereby granted without fee, provided
+ * that (i) the above copyright notices and this permission notice appear in
+ * all copies of the software and related documentation, and (ii) the name of
+ * Silicon Graphics may not be used in any advertising or
+ * publicity relating to the software without the specific, prior written
+ * permission of Silicon Graphics.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF
+ * ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL SILICON GRAPHICS BE LIABLE FOR
+ * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
+ * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+ * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
+ * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
+ * OF THIS SOFTWARE.
+ */
+
+#include <math.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+
+#define CI_OFFSET_1 16
+#define CI_OFFSET_2 32
+
+
+GLenum doubleBuffer;
+GLboolean smooth = GL_TRUE;
+GLfloat width = 1.0;
+
+
+static void Init(void)
+{
+ float range[2], aarange[2];
+ fprintf(stderr, "GL_RENDERER = %s\n", (char *) glGetString(GL_RENDERER));
+ fprintf(stderr, "GL_VERSION = %s\n", (char *) glGetString(GL_VERSION));
+ fprintf(stderr, "GL_VENDOR = %s\n", (char *) glGetString(GL_VENDOR));
+ glGetFloatv(GL_LINE_WIDTH_RANGE, aarange);
+ glGetFloatv(GL_ALIASED_LINE_WIDTH_RANGE, range);
+ printf("Non-AA line width range: %f .. %f\n", range[0], range[1]);
+ printf("AA line width range: %f .. %f\n", aarange[0], aarange[1]);
+}
+
+
+static void Reshape(int width, int height)
+{
+ glViewport(0, 0, (GLint)width, (GLint)height);
+ glMatrixMode(GL_PROJECTION);
+ glLoadIdentity();
+ glOrtho(-1.0, 1.0, -1.0, 1.0, -0.5, 1000.0);
+ glMatrixMode(GL_MODELVIEW);
+ glLoadIdentity();
+ glTranslatef(0, 0, -30);
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+ switch (key) {
+ case 'w':
+ width -= 0.5;
+ if (width < 0.5)
+ width = 0.5;
+ break;
+ case 'W':
+ width += 0.5;
+ break;
+ case 's':
+ smooth = !smooth;
+ break;
+ case 27:
+ exit(1);
+ default:
+ return;
+ }
+ printf("LineWidth: %g\n", width);
+ glutPostRedisplay();
+}
+
+
+static void Draw(void)
+{
+ float a;
+
+ glClear(GL_COLOR_BUFFER_BIT);
+
+ glLineWidth(width);
+
+ if (smooth) {
+ glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
+ glEnable(GL_BLEND);
+ glEnable(GL_LINE_SMOOTH);
+ }
+
+ glColor3f(1, 1, 1);
+
+ glBegin(GL_LINES);
+ for (a = 0; a < 3.14159; a += 0.2) {
+ float x = .9 * cos(a);
+ float y = .9 * sin(a);
+
+ glVertex2f(-x, -y);
+ glVertex2f( x, y);
+ }
+ glEnd();
+
+ glDisable(GL_LINE_SMOOTH);
+ glDisable(GL_BLEND);
+
+ glFlush();
+
+ if (doubleBuffer) {
+ glutSwapBuffers();
+ }
+}
+
+static GLenum Args(int argc, char **argv)
+{
+ GLint i;
+
+ doubleBuffer = GL_FALSE;
+
+ for (i = 1; i < argc; i++) {
+ if (strcmp(argv[i], "-sb") == 0) {
+ doubleBuffer = GL_FALSE;
+ } else if (strcmp(argv[i], "-db") == 0) {
+ doubleBuffer = GL_TRUE;
+ } else {
+ fprintf(stderr, "%s (Bad option).\n", argv[i]);
+ return GL_FALSE;
+ }
+ }
+ return GL_TRUE;
+}
+
+
+int main(int argc, char **argv)
+{
+ GLenum type;
+
+ glutInit(&argc, argv);
+
+ if (Args(argc, argv) == GL_FALSE) {
+ exit(1);
+ }
+
+ glutInitWindowPosition(0, 0); glutInitWindowSize( 250, 250);
+
+ type = GLUT_RGB;
+ type |= (doubleBuffer) ? GLUT_DOUBLE : GLUT_SINGLE;
+ glutInitDisplayMode(type);
+
+ if (glutCreateWindow(argv[0]) == GL_FALSE) {
+ exit(1);
+ }
+
+ Init();
+
+ glutReshapeFunc(Reshape);
+ glutKeyboardFunc(Key);
+ glutDisplayFunc(Draw);
+ glutMainLoop();
+ return 0;
+}