1 files changed, 138 insertions, 0 deletions
diff --git a/progs/perf/vbo.c b/progs/perf/vbo.c
new file mode 100644
index 00000000000..d2630796ae2
--- /dev/null
+++ b/progs/perf/vbo.c
@@ -0,0 +1,138 @@
+/*
+ * Copyright (C) 2009  VMware, Inc.  All Rights Reserved.
+ *
+ * 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
+ * VMWARE 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.
+ */
+
+/**
+ * Measure VBO upload speed.
+ * That is, measure glBufferDataARB() and glBufferSubDataARB().
+ *
+ * Brian Paul
+ * 16 Sep 2009
+ */
+
+#include <string.h>
+#include "glmain.h"
+#include "common.h"
+
+
+int WinWidth = 100, WinHeight = 100;
+
+static GLuint VBO;
+
+static GLsizei VBOSize = 0;
+static GLubyte *VBOData = NULL;
+
+static const GLboolean DrawPoint = GL_TRUE;
+static const GLboolean BufferSubDataInHalves = GL_TRUE;
+
+static const GLfloat Vertex0[2] = { 0.0, 0.0 };
+
+
+/** Called from test harness/main */
+void
+PerfInit(void)
+{
+   /* setup VBO */
+   glGenBuffersARB(1, &VBO);
+   glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
+   glVertexPointer(2, GL_FLOAT, sizeof(Vertex0), (void *) 0);
+   glEnableClientState(GL_VERTEX_ARRAY);
+}
+
+
+static void
+UploadVBO(unsigned count)
+{
+   unsigned i;
+   for (i = 0; i < count; i++) {
+      glBufferDataARB(GL_ARRAY_BUFFER, VBOSize, VBOData, GL_STREAM_DRAW_ARB);
+
+      if (DrawPoint)
+         glDrawArrays(GL_POINTS, 0, 1);
+   }
+   glFinish();
+}
+
+
+static void
+UploadSubVBO(unsigned count)
+{
+   unsigned i;
+   for (i = 0; i < count; i++) {
+      if (BufferSubDataInHalves) {
+         GLsizei half = VBOSize / 2;
+         glBufferSubDataARB(GL_ARRAY_BUFFER, 0, half, VBOData);
+         glBufferSubDataARB(GL_ARRAY_BUFFER, half, half, VBOData + half);
+      }
+      else {
+         glBufferSubDataARB(GL_ARRAY_BUFFER, 0, VBOSize, VBOData);
+      }
+
+      if (DrawPoint)
+         glDrawArrays(GL_POINTS, 0, 1);
+   }
+   glFinish();
+}
+
+
+static const GLsizei Sizes[] = {
+   64,
+   1024,
+   16*1024,
+   256*1024,
+   1024*1024,
+   16*1024*1024,
+   0 /* end of list */
+};
+
+
+/** Called from test harness/main */
+void
+PerfDraw(void)
+{
+   double rate, mbPerSec;
+   int sub, sz;
+
+   /* loop over whole/sub buffer upload */
+   for (sub = 0; sub < 2; sub++) {
+
+      /* loop over VBO sizes */
+      for (sz = 0; Sizes[sz]; sz++) {
+         VBOSize = Sizes[sz];
+
+         VBOData = malloc(VBOSize);
+         memcpy(VBOData, Vertex0, sizeof(Vertex0));
+
+         if (sub)
+            rate = PerfMeasureRate(UploadSubVBO);
+         else
+            rate = PerfMeasureRate(UploadVBO);
+
+         mbPerSec = rate * VBOSize / (1024.0 * 1024.0);
+
+         perf_printf("  glBuffer%sDataARB(size = %d): %.1f MB/sec\n",
+                     (sub ? "Sub" : ""), VBOSize, mbPerSec);
+
+         free(VBOData);
+      }
+   }
+
+   exit(0);
+}