summaryrefslogtreecommitdiff
path: root/progs/perf/fbobind.c
diff options
context:
space:
mode:
Diffstat (limited to 'progs/perf/fbobind.c')
-rw-r--r--progs/perf/fbobind.c151
1 files changed, 151 insertions, 0 deletions
diff --git a/progs/perf/fbobind.c b/progs/perf/fbobind.c
new file mode 100644
index 0000000000..99a56ef2f7
--- /dev/null
+++ b/progs/perf/fbobind.c
@@ -0,0 +1,151 @@
+/*
+ * 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 rate of binding/switching between FBO targets.
+ * Create two framebuffer objects for rendering to two textures.
+ * Ping pong between texturing from one and drawing into the other.
+ *
+ * Brian Paul
+ * 22 Sep 2009
+ */
+
+#include <string.h>
+#include "glmain.h"
+#include "common.h"
+
+int WinWidth = 100, WinHeight = 100;
+
+static GLuint VBO;
+
+static GLuint FBO[2], Tex[2];
+
+static const GLsizei TexSize = 512;
+
+static const GLboolean DrawPoint = GL_TRUE;
+
+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)
+{
+ const GLenum filter = GL_LINEAR;
+ GLenum stat;
+ int i;
+
+ if (!PerfExtensionSupported("GL_EXT_framebuffer_object")) {
+ perf_printf("fboswitch: GL_EXT_framebuffer_object not supported\n");
+ exit(0);
+ }
+
+ /* setup VBO */
+ 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);
+
+ glGenFramebuffersEXT(2, FBO);
+ glGenTextures(2, Tex);
+
+ for (i = 0; i < 2; i++) {
+ /* setup texture */
+ glBindTexture(GL_TEXTURE_2D, Tex[i]);
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
+ TexSize, TexSize, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+
+
+ /* setup fbo */
+ glBindFramebufferEXT(GL_FRAMEBUFFER, FBO[i]);
+ glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT,
+ GL_COLOR_ATTACHMENT0_EXT,
+ GL_TEXTURE_2D, Tex[i], 0/*level*/);
+ stat = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (stat != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ perf_printf("fboswitch: Error: incomplete FBO!\n");
+ exit(1);
+ }
+
+ /* clear the FBO */
+ glClear(GL_COLOR_BUFFER_BIT);
+ }
+}
+
+
+static void
+FBOBind(unsigned count)
+{
+ unsigned i;
+ for (i = 1; i < count; i++) {
+ const GLuint dst = i & 1;
+ const GLuint src = 1 - dst;
+
+ /* bind src texture */
+ glBindTexture(GL_TEXTURE_2D, Tex[src]);
+
+ /* bind dst fbo */
+ glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, FBO[dst]);
+ glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
+
+ /* draw something */
+ if (DrawPoint)
+ glDrawArrays(GL_POINTS, 0, 1);
+ }
+ glFinish();
+}
+
+
+/** Called from test harness/main */
+void
+PerfNextRound(void)
+{
+}
+
+
+/** Called from test harness/main */
+void
+PerfDraw(void)
+{
+ double rate;
+
+ rate = PerfMeasureRate(FBOBind);
+ perf_printf(" FBO Binding: %1.f binds/sec\n", rate);
+
+ exit(0);
+}