summaryrefslogtreecommitdiff
path: root/progs/perf/genmipmap.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/perf/genmipmap.c')
-rw-r--r--progs/perf/genmipmap.c136
1 files changed, 136 insertions, 0 deletions
diff --git a/progs/perf/genmipmap.c b/progs/perf/genmipmap.c
new file mode 100644
index 0000000000..4b7d6ad155
--- /dev/null
+++ b/progs/perf/genmipmap.c
@@ -0,0 +1,136 @@
+/*
+ * 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 glGenerateMipmap() speed.
+ *
+ * Brian Paul
+ * 24 Sep 2009
+ */
+
+#include <string.h>
+#include "glmain.h"
+#include "common.h"
+
+
+int WinWidth = 100, WinHeight = 100;
+
+static GLboolean DrawPoint = GL_TRUE;
+static GLuint VBO;
+static GLuint TexObj = 0;
+static GLint BaseLevel, MaxLevel;
+
+struct vertex
+{
+ GLfloat x, y, s, t;
+};
+
+static const struct vertex vertices[1] = {
+ { 0.0, 0.0, 0.5, 0.5 },
+};
+
+#define VOFFSET(F) ((void *) offsetof(struct vertex, F))
+
+/** Called from test harness/main */
+void
+PerfInit(void)
+{
+ /* setup VBO w/ vertex data */
+ glGenBuffersARB(1, &VBO);
+ glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO);
+ glBufferDataARB(GL_ARRAY_BUFFER_ARB,
+ sizeof(vertices), vertices, GL_STATIC_DRAW_ARB);
+ glVertexPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(x));
+ glTexCoordPointer(2, GL_FLOAT, sizeof(struct vertex), VOFFSET(s));
+ glEnableClientState(GL_VERTEX_ARRAY);
+ glEnableClientState(GL_TEXTURE_COORD_ARRAY);
+
+ glGenTextures(1, &TexObj);
+ glBindTexture(GL_TEXTURE_2D, TexObj);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
+ glEnable(GL_TEXTURE_2D);
+}
+
+
+static void
+GenMipmap(unsigned count)
+{
+ unsigned i;
+ for (i = 0; i < count; i++) {
+ GLubyte texel[4];
+ texel[0] = texel[1] = texel[2] = texel[3] = i & 0xff;
+ /* dirty the base image */
+ glTexSubImage2D(GL_TEXTURE_2D, BaseLevel,
+ 0, 0, 1, 1, GL_RGBA, GL_UNSIGNED_BYTE, texel);
+ glGenerateMipmap(GL_TEXTURE_2D);
+ if (DrawPoint)
+ glDrawArrays(GL_POINTS, 0, 1);
+ }
+ glFinish();
+}
+
+
+/** Called from test harness/main */
+void
+PerfNextRound(void)
+{
+}
+
+
+/** Called from test harness/main */
+void
+PerfDraw(void)
+{
+ const GLint NumLevels = 12;
+ const GLint TexWidth = 2048, TexHeight = 2048;
+ GLubyte *img;
+ double rate;
+
+ /* Make 2K x 2K texture */
+ img = (GLubyte *) malloc(TexWidth * TexHeight * 4);
+ memset(img, 128, TexWidth * TexHeight * 4);
+ glTexImage2D(GL_TEXTURE_2D, 0,
+ GL_RGBA, TexWidth, TexHeight, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, img);
+ free(img);
+
+ perf_printf("Texture level[0] size: %d x %d, %d levels\n",
+ TexWidth, TexHeight, NumLevels);
+
+ /* loop over base levels 0, 2, 4 */
+ for (BaseLevel = 0; BaseLevel <= 4; BaseLevel += 2) {
+
+ /* loop over max level */
+ for (MaxLevel = NumLevels; MaxLevel > BaseLevel; MaxLevel--) {
+
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_BASE_LEVEL, BaseLevel);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAX_LEVEL, MaxLevel);
+
+ rate = PerfMeasureRate(GenMipmap);
+
+ perf_printf(" glGenerateMipmap(levels %d..%d): %.2f gens/sec\n",
+ BaseLevel + 1, MaxLevel, rate);
+ }
+ }
+
+ exit(0);
+}