1 files changed, 271 insertions, 0 deletions
diff --git a/progs/perf/vertexrate.c b/progs/perf/vertexrate.c
new file mode 100644
index 0000000000..f7e02624cc
--- /dev/null
+++ b/progs/perf/vertexrate.c
@@ -0,0 +1,271 @@
+/*
+ * 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 simple vertex processing rate via:
+ *  - immediate mode
+ *  - vertex arrays
+ *  - VBO vertex arrays
+ *  - glDrawElements
+ *  - VBO glDrawElements
+ *  - glDrawRangeElements
+ *  - VBO glDrawRangeElements
+ *
+ * Brian Paul
+ * 16 Sep 2009
+ */
+
+#include <assert.h>
+#include <string.h>
+#include "glmain.h"
+#include "common.h"
+
+
+#define MAX_VERTS (100 * 100)
+
+/** glVertex2/3/4 size */
+#define VERT_SIZE 4
+
+int WinWidth = 500, WinHeight = 500;
+
+static GLuint VertexBO, ElementBO;
+
+static unsigned NumVerts = MAX_VERTS;
+static unsigned VertBytes = VERT_SIZE * sizeof(float);
+static float *VertexData = NULL;
+
+static unsigned NumElements = MAX_VERTS;
+static GLuint *Elements = NULL;
+
+
+/**
+ * Load VertexData buffer with a 2-D grid of points in the range [-1,1]^2.
+ */
+static void
+InitializeVertexData(void)
+{
+   unsigned i;
+   float x = -1.0, y = -1.0;
+   float dx = 2.0 / 100;
+   float dy = 2.0 / 100;
+
+   VertexData = (float *) malloc(NumVerts * VertBytes);
+
+   for (i = 0; i < NumVerts; i++) {
+      VertexData[i * VERT_SIZE + 0] = x;
+      VertexData[i * VERT_SIZE + 1] = y;
+      VertexData[i * VERT_SIZE + 2] = 0.0;
+      VertexData[i * VERT_SIZE + 3] = 1.0;
+      x += dx;
+      if (x > 1.0) {
+         x = -1.0;
+         y += dy;
+      }
+   }
+
+   Elements = (GLuint *) malloc(NumVerts * sizeof(GLuint));
+
+   for (i = 0; i < NumVerts; i++) {
+      Elements[i] = NumVerts - i - 1;
+   }
+}
+
+
+/** Called from test harness/main */
+void
+PerfInit(void)
+{
+   InitializeVertexData();
+
+   /* setup VertexBO */
+   glGenBuffersARB(1, &VertexBO);
+   glBindBufferARB(GL_ARRAY_BUFFER_ARB, VertexBO);
+   glBufferDataARB(GL_ARRAY_BUFFER_ARB,
+                   NumVerts * VertBytes, VertexData, GL_STATIC_DRAW_ARB);
+   glEnableClientState(GL_VERTEX_ARRAY);
+
+   /* setup ElementBO */
+   glGenBuffersARB(1, &ElementBO);
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, ElementBO);
+   glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
+                   NumElements * sizeof(GLuint), Elements, GL_STATIC_DRAW_ARB);
+}
+
+
+static void
+DrawImmediate(unsigned count)
+{
+   unsigned i;
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
+   glBindBufferARB(GL_ARRAY_BUFFER, 0);
+   for (i = 0; i < count; i++) {
+      unsigned j;
+      glBegin(GL_POINTS);
+      for (j = 0; j < NumVerts; j++) {
+#if VERT_SIZE == 4
+         glVertex4fv(VertexData + j * 4);
+#elif VERT_SIZE == 3
+         glVertex3fv(VertexData + j * 3);
+#elif VERT_SIZE == 2
+         glVertex2fv(VertexData + j * 2);
+#else
+         abort();
+#endif
+      }
+      glEnd();
+   }
+   glFinish();
+   PerfSwapBuffers();
+}
+
+
+static void
+DrawArraysMem(unsigned count)
+{
+   unsigned i;
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
+   glBindBufferARB(GL_ARRAY_BUFFER, 0);
+   glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, VertexData);
+   for (i = 0; i < count; i++) {
+      glDrawArrays(GL_POINTS, 0, NumVerts);
+   }
+   glFinish();
+   PerfSwapBuffers();
+}
+
+
+static void
+DrawArraysVBO(unsigned count)
+{
+   unsigned i;
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
+   glBindBufferARB(GL_ARRAY_BUFFER, VertexBO);
+   glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, (void *) 0);
+   for (i = 0; i < count; i++) {
+      glDrawArrays(GL_POINTS, 0, NumVerts);
+   }
+   glFinish();
+   PerfSwapBuffers();
+}
+
+
+static void
+DrawElementsMem(unsigned count)
+{
+   unsigned i;
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
+   glBindBufferARB(GL_ARRAY_BUFFER, 0);
+   glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, VertexData);
+   for (i = 0; i < count; i++) {
+      glDrawElements(GL_POINTS, NumVerts, GL_UNSIGNED_INT, Elements);
+   }
+   glFinish();
+   PerfSwapBuffers();
+}
+
+
+static void
+DrawElementsBO(unsigned count)
+{
+   unsigned i;
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, ElementBO);
+   glBindBufferARB(GL_ARRAY_BUFFER, VertexBO);
+   glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, (void *) 0);
+   for (i = 0; i < count; i++) {
+      glDrawElements(GL_POINTS, NumVerts, GL_UNSIGNED_INT, (void *) 0);
+   }
+   glFinish();
+   PerfSwapBuffers();
+}
+
+
+static void
+DrawRangeElementsMem(unsigned count)
+{
+   unsigned i;
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
+   glBindBufferARB(GL_ARRAY_BUFFER, 0);
+   glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, VertexData);
+   for (i = 0; i < count; i++) {
+      glDrawRangeElements(GL_POINTS, 0, NumVerts - 1,
+                          NumVerts, GL_UNSIGNED_INT, Elements);
+   }
+   glFinish();
+   PerfSwapBuffers();
+}
+
+
+static void
+DrawRangeElementsBO(unsigned count)
+{
+   unsigned i;
+   glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, ElementBO);
+   glBindBufferARB(GL_ARRAY_BUFFER, VertexBO);
+   glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, (void *) 0);
+   for (i = 0; i < count; i++) {
+      glDrawRangeElements(GL_POINTS, 0, NumVerts - 1,
+                          NumVerts, GL_UNSIGNED_INT, (void *) 0);
+   }
+   glFinish();
+   PerfSwapBuffers();
+}
+
+
+/** Called from test harness/main */
+void
+PerfDraw(void)
+{
+   double rate;
+
+   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
+
+   printf("Vertex rate (%d x Vertex%df)\n", NumVerts, VERT_SIZE);
+
+   rate = PerfMeasureRate(DrawImmediate);
+   rate *= NumVerts;
+   printf("  Immediate mode: %.1f verts/sec\n", rate);
+
+   rate = PerfMeasureRate(DrawArraysMem);
+   rate *= NumVerts;
+   printf("  glDrawArrays: %.1f verts/sec\n", rate);
+
+   rate = PerfMeasureRate(DrawArraysVBO);
+   rate *= NumVerts;
+   printf("  VBO glDrawArrays: %.1f verts/sec\n", rate);
+
+   rate = PerfMeasureRate(DrawElementsMem);
+   rate *= NumVerts;
+   printf("  glDrawElements: %.1f verts/sec\n", rate);
+
+   rate = PerfMeasureRate(DrawElementsBO);
+   rate *= NumVerts;
+   printf("  VBO glDrawElements: %.1f verts/sec\n", rate);
+
+   rate = PerfMeasureRate(DrawRangeElementsMem);
+   rate *= NumVerts;
+   printf("  glDrawRangeElements: %.1f verts/sec\n", rate);
+
+   rate = PerfMeasureRate(DrawRangeElementsBO);
+   rate *= NumVerts;
+   printf("  VBO glDrawRangeElements: %.1f verts/sec\n", rate);
+
+   exit(0);
+}