From 544dd4b11f7be76bb00fe29a60eaf2772dcc69ca Mon Sep 17 00:00:00 2001
From: Zack Rusin <zackr@vmware.com>
Date: Fri, 1 May 2009 12:41:38 -0400
Subject: OpenVG 1.0 State Tracker

Import of the OpenVG 1.0 state tracker for Gallium.
---
 progs/openvg/trivial/stroke.c | 116 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 116 insertions(+)
 create mode 100644 progs/openvg/trivial/stroke.c

(limited to 'progs/openvg/trivial/stroke.c')

diff --git a/progs/openvg/trivial/stroke.c b/progs/openvg/trivial/stroke.c
new file mode 100644
index 0000000000..58ae5b7bc8
--- /dev/null
+++ b/progs/openvg/trivial/stroke.c
@@ -0,0 +1,116 @@
+#include "eglcommon.h"
+
+#include <VG/openvg.h>
+#include <X11/keysym.h>
+#include <stdio.h>
+
+const VGfloat white_color[4] = {1.0, 1.0, 1.0, 1.0};
+const VGfloat color[4] = {0.4, 0.1, 1.0, 1.0};
+
+VGPath path;
+VGPaint fill;
+
+VGint cap_style = VG_CAP_BUTT;
+VGint join_style = VG_JOIN_MITER;
+
+static void
+init(void)
+{
+#if 0
+   static const VGubyte cmds[] = {VG_MOVE_TO_ABS,
+                                  VG_CUBIC_TO_ABS,
+   };
+   static const VGfloat coords[]   = {30, 30, 264, 0, 0, 264, 234, 234
+   };
+#else
+   static const VGubyte cmds[] = {VG_MOVE_TO_ABS,
+                                  VG_LINE_TO_ABS,
+                                  VG_LINE_TO_ABS
+   };
+   static const VGfloat coords[]   = {30, 30, 202, 30, 150, 224
+   };
+#endif
+   VGfloat dash_pattern[2] = { 20.f, 20.f };
+   path = vgCreatePath(VG_PATH_FORMAT_STANDARD, VG_PATH_DATATYPE_F, 1, 0, 0, 0,
+                       VG_PATH_CAPABILITY_APPEND_TO);
+   vgAppendPathData(path, 3, cmds, coords);
+
+   fill = vgCreatePaint();
+   vgSetParameterfv(fill, VG_PAINT_COLOR, 4, color);
+   vgSetPaint(fill, VG_FILL_PATH);
+
+   vgSetfv(VG_CLEAR_COLOR, 4, white_color);
+   vgSetf(VG_STROKE_LINE_WIDTH, 20);
+   vgSeti(VG_STROKE_CAP_STYLE, cap_style);
+   vgSeti(VG_STROKE_JOIN_STYLE, join_style);
+   vgSetfv(VG_STROKE_DASH_PATTERN, 2, dash_pattern);
+   vgSetf(VG_STROKE_DASH_PHASE, 0.0f);
+}
+
+/* new window size or exposure */
+static void
+reshape(int w, int h)
+{
+   vgLoadIdentity();
+}
+
+static void
+draw(void)
+{
+   vgClear(0, 0, window_width(), window_height());
+   vgDrawPath(path, VG_STROKE_PATH);
+
+   vgFlush();
+}
+
+static int  key_press(unsigned key)
+{
+    switch(key) {
+    case XK_c:
+    case XK_C:
+        ++cap_style;
+        if (cap_style > VG_CAP_SQUARE)
+            cap_style = VG_CAP_BUTT;
+        switch(cap_style) {
+        case VG_CAP_BUTT:
+            fprintf(stderr, "Cap style 'butt'\n");
+            break;
+        case VG_CAP_ROUND:
+            fprintf(stderr, "Cap style 'round'\n");
+            break;
+        case VG_CAP_SQUARE:
+            fprintf(stderr, "Cap style 'square'\n");
+            break;
+        }
+        vgSeti(VG_STROKE_CAP_STYLE, cap_style);
+        break;
+    case XK_j:
+    case XK_J:
+        ++join_style;
+        if (join_style > VG_JOIN_BEVEL)
+            join_style = VG_JOIN_MITER;
+        switch(join_style) {
+        case VG_JOIN_MITER:
+            fprintf(stderr, "Join style 'miter'\n");
+            break;
+        case VG_JOIN_ROUND:
+            fprintf(stderr, "Join style 'round'\n");
+            break;
+        case VG_JOIN_BEVEL:
+            fprintf(stderr, "Join style 'bevel'\n");
+            break;
+        }
+        vgSeti(VG_STROKE_JOIN_STYLE, join_style);
+        break;
+    default:
+        break;
+    }
+
+    return VG_TRUE;
+}
+
+int main(int argc, char **argv)
+{
+   return run(argc, argv, init, reshape,
+              draw, key_press);
+}
-- 
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