test: Reduce code duplication in test-suite programs

[fips] / test / handle-events.c

diff --git a/test/handle-events.c b/test/handle-events.c
new file mode 100644 (file)
index 0000000..3939c04
--- /dev/null
+++ b/test/handle-events.c
@@ -0,0 +1,139 @@
+/* Copyright © 2013, 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 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 is C code intended to be included (yes, included) by test
+ * programs in the fips test suite.
+ *
+ * It defines a function:
+ *
+ *     static void
+ *     handle_events(Display *dpy, Window window);
+ *
+ * which handles X events, responding by drawing a few frames using
+ * OpenGL.
+ *
+ * Before including this file, the test program must define a macro
+ * HANDLE_EVENTS_GL_PREFIX to some prefix. This macro can be empty (to
+ * directly call functions in an OpenGL-library directly linked) or
+ * can be some custom prefix to call through symbols defined in the
+ * test program.
+ */
+
+#ifndef HANDLE_EVENTS_GL_PREFIX
+#error Code including handle-events.c must define HANDLE_EVENTS_GL_PREFIX
+#endif
+
+#define concat_(a,b) a ## b
+#define concat(a,b) concat_(a,b)
+#define _(func) concat(HANDLE_EVENTS_GL_PREFIX, func)
+
+static void
+set_2d_projection (int width, int height)
+{
+       _(glMatrixMode) (GL_PROJECTION);
+       _(glLoadIdentity) ();
+       _(glOrtho) (0, width, height, 0, 0, 1);
+       _(glMatrixMode) (GL_MODELVIEW);
+}
+
+static void
+paint_rgb_using_clear (double r, double g, double b)
+{
+        _(glClearColor) (r, g, b, 1.0);
+        _(glClear) (GL_COLOR_BUFFER_BIT);
+}
+
+static void
+draw (Display *dpy, Window window, int width, int height)
+{
+       int i;
+        int visual_attr[] = {
+                GLX_RGBA,
+                GLX_RED_SIZE,          8,
+                GLX_GREEN_SIZE,        8,
+                GLX_BLUE_SIZE,         8,
+                GLX_ALPHA_SIZE,        8,
+                GLX_DOUBLEBUFFER,
+                GLX_DEPTH_SIZE,                24,
+                GLX_STENCIL_SIZE,      8,
+                GLX_X_VISUAL_TYPE,     GLX_DIRECT_COLOR,
+                None
+        };
+
+       /* Window and context setup. */
+        XVisualInfo *visual_info = _(glXChooseVisual) (dpy, 0, visual_attr);
+        GLXContext ctx = _(glXCreateContext) (dpy, visual_info, NULL, True);
+        _(glXMakeCurrent) (dpy, window, ctx);
+
+        _(glViewport) (0, 0, width, height);
+
+       set_2d_projection (width, height);
+
+/* Simply count through some colors, frame by frame. */
+#define RGB(frame) (((frame+1)/4) % 2), (((frame+1)/2) % 2), ((frame+1) % 2)
+
+       int frame = 0;
+       for (i = 0; i < 2; i++) {
+               /* Frame: Draw a solid (magenta) frame */
+               paint_rgb_using_clear (RGB(frame));
+               _(glXSwapBuffers) (dpy, window);
+               frame++;
+
+               /* Frame: Draw a solid (yellow) frame */
+               paint_rgb_using_clear (RGB(frame));
+               _(glXSwapBuffers) (dpy, window);
+               frame++;
+
+               /* Frame: Draw a solid (cyan) frame */
+               paint_rgb_using_clear (RGB(frame));
+               _(glXSwapBuffers) (dpy, window);
+               frame++;
+       }
+
+       /* Cleanup */
+        _(glXDestroyContext) (dpy, ctx);
+}
+
+static void
+handle_events(Display *dpy, Window window)
+{
+        XEvent xev;
+       int width = 0;
+       int height = 0;
+
+        XNextEvent (dpy, &xev);
+
+        while (1) {
+                XNextEvent (dpy, &xev);
+                switch (xev.type) {
+                case ConfigureNotify:
+                        width = xev.xconfigure.width;
+                        height = xev.xconfigure.height;
+                        break;
+                case Expose:
+                        if (xev.xexpose.count == 0) {
+                                draw (dpy, window, width, height);
+                                return;
+                        }
+                        break;
+                }
+        }
+}