Demos (master): tests: Add application to step various gl operations

[Jakob Bornecrantz]

Module: Demos
Branch: master
Commit: 049ab345b8da859f1853017f2d33d012c5f4b83b
URL:    http://cgit.freedesktop.org/mesa/demos/commit/?id=049ab345b8da859f1853017f2d33d012c5f4b83b

Author: Jakob Bornecrantz <wallbraker at gmail.com>
Date:   Mon Jan 24 05:12:41 2011 +0100

tests: Add application to step various gl operations

---

 src/tests/.gitignore     |    1 +
 src/tests/CMakeLists.txt |    1 +
 src/tests/Makefile.am    |    1 +
 src/tests/step.c         |  180 ++++++++++++++++++++++++++++++++++++++++++++++
 4 files changed, 183 insertions(+), 0 deletions(-)

diff --git a/src/tests/.gitignore b/src/tests/.gitignore
index b6d112e..852ba52 100644
--- a/src/tests/.gitignore
+++ b/src/tests/.gitignore
@@ -83,6 +83,7 @@ stencilreaddraw
 stencil_twoside
 stencilwrap
 stencil_wrap
+step
 streaming_rect
 subtex
 subtexrate
diff --git a/src/tests/CMakeLists.txt b/src/tests/CMakeLists.txt
index b998a61..d807c9b 100644
--- a/src/tests/CMakeLists.txt
+++ b/src/tests/CMakeLists.txt
@@ -100,6 +100,7 @@ set (targets
 	shader_api
 	stencilreaddraw
 	stencilwrap
+	step
 	streaming_rect
 	subtex
 	subtexrate
diff --git a/src/tests/Makefile.am b/src/tests/Makefile.am
index 6baa94f..e650b62 100644
--- a/src/tests/Makefile.am
+++ b/src/tests/Makefile.am
@@ -127,6 +127,7 @@ noinst_PROGRAMS = \
 	sharedtex \
 	stencilreaddraw \
 	stencilwrap \
+	step \
 	streaming_rect \
 	subtex \
 	subtexrate \
diff --git a/src/tests/step.c b/src/tests/step.c
new file mode 100644
index 0000000..c6a317e
--- /dev/null
+++ b/src/tests/step.c
@@ -0,0 +1,180 @@
+/*
+ * 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 <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <GL/glut.h>
+
+
+#define CI_OFFSET_1 16
+#define CI_OFFSET_2 32
+
+
+GLenum doubleBuffer = 1;
+int win;
+
+static void Init(void)
+{
+   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));
+   fflush(stderr);
+
+   glClearColor(0.3, 0.1, 0.3, 0.0);
+}
+
+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);
+}
+
+static void Clear(void)
+{
+   fprintf(stderr, "::clearing\n");
+   fflush(stderr);
+
+   glClear(GL_COLOR_BUFFER_BIT); 
+}
+
+static void DrawTri(void)
+{
+   fprintf(stderr, "::drawing - tri\n");
+   fflush(stderr);
+
+   glBegin(GL_TRIANGLES);
+   glColor3f(.8,0,0); 
+   glVertex3f(-0.9, -0.9, -30.0);
+   glColor3f(0,.9,0); 
+   glVertex3f( 0.9, -0.9, -30.0);
+   glColor3f(0,0,.7); 
+   glVertex3f( 0.0,  0.9, -30.0);
+   glEnd();
+}
+
+static void DrawClipTri(void)
+{
+   fprintf(stderr, "::drawing - tri clipped\n");
+   fflush(stderr);
+
+   glBegin(GL_TRIANGLES);
+   glColor3f(.8,0,0); 
+   glVertex3f(-0.9,  0.9, -30.0);
+   glColor3f(0,.9,0); 
+   glVertex3f( 0.9,  0.9, -30.0);
+   glColor3f(0,0,.7); 
+   glVertex3f( 0.0, -1.9, -30.0);
+   glEnd();
+}
+
+static void Swap(void)
+{
+   fprintf(stderr, "::swapping\n");
+   fflush(stderr);
+
+   glutSwapBuffers();
+}
+
+static void Flush(void)
+{
+   fprintf(stderr, "::flush\n");
+   fflush(stderr);
+
+   glFlush();
+}
+
+static void Key(unsigned char key, int x, int y)
+{
+   switch (key) {
+      case 27:
+         glutDestroyWindow(win);
+         exit(0);
+      case 't':
+         DrawTri();
+         break;
+      case 'T':
+         DrawClipTri();
+         break;
+      case 'f':
+         Flush();
+         break;
+      case 's':
+         Swap();
+         Clear();
+         break;
+      default:
+         return;
+   }
+}
+
+static void Draw(void)
+{
+   Clear();
+   DrawTri();
+   DrawClipTri();
+   Swap();
+   Clear();
+}
+
+static void
+Usage(void)
+{
+   printf("usage:\n");
+   printf("  t/T    draw a triangle (caps for clipped)\n");
+   printf("  f      flush\n");
+   printf("  s      swap\n");
+}
+
+int main(int argc, char **argv)
+{
+   GLenum type;
+
+   glutInit(&argc, argv);
+
+   glutInitWindowPosition(0, 0);
+   glutInitWindowSize(250, 250);
+
+   type = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE;
+   glutInitDisplayMode(type);
+
+   win = glutCreateWindow(*argv);
+   if (!win) {
+      exit(1);
+   }
+
+   Init();
+
+   Usage();
+
+   glutReshapeFunc(Reshape);
+   glutKeyboardFunc(Key);
+   glutDisplayFunc(Draw);
+   glutMainLoop();
+   return 0;
+}