--- /dev/null
+/*
+ * 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 glCopyTex[Sub]Image() rate.
+ * Create a large, off-screen framebuffer object for rendering and
+ * copying the texture data from it since we can't make really large
+ * on-screen windows.
+ *
+ * Brian Paul
+ * 22 Sep 2009
+ */
+
+#include <string.h>
+#include "glmain.h"
+#include "common.h"
+
+int WinWidth = 100, WinHeight = 100;
+
+static GLuint VBO, FBO, RBO, Tex;
+
+const GLsizei MinSize = 16, MaxSize = 4096;
+static GLsizei TexSize;
+
+static const GLboolean DrawPoint = GL_TRUE;
+static const GLboolean TexSubImage4 = GL_FALSE;
+
+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;
+
+ if (!PerfExtensionSupported("GL_EXT_framebuffer_object")) {
+ perf_printf("copytex: 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);
+
+ /* setup texture */
+ glGenTextures(1, &Tex);
+ glBindTexture(GL_TEXTURE_2D, Tex);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, filter);
+ glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, filter);
+ glEnable(GL_TEXTURE_2D);
+
+ /* setup rbo */
+ glGenRenderbuffersEXT(1, &RBO);
+ glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, RBO);
+ glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_RGBA, MaxSize, MaxSize);
+
+ /* setup fbo */
+ glGenFramebuffersEXT(1, &FBO);
+ glBindFramebufferEXT(GL_FRAMEBUFFER, FBO);
+ glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT,
+ GL_COLOR_ATTACHMENT0_EXT,
+ GL_RENDERBUFFER_EXT, RBO);
+
+ stat = glCheckFramebufferStatusEXT(GL_FRAMEBUFFER_EXT);
+ if (stat != GL_FRAMEBUFFER_COMPLETE_EXT) {
+ perf_printf("fboswitch: Error: incomplete FBO!\n");
+ exit(1);
+ }
+
+ /* clear the FBO */
+ glDrawBuffer(GL_COLOR_ATTACHMENT0_EXT);
+ glViewport(0, 0, MaxSize, MaxSize);
+ glClear(GL_COLOR_BUFFER_BIT);
+}
+
+
+static void
+CopyTexImage(unsigned count)
+{
+ unsigned i;
+ for (i = 1; i < count; i++) {
+ /* draw something */
+ if (DrawPoint)
+ glDrawArrays(GL_POINTS, 0, 1);
+
+ /* copy whole texture */
+ glCopyTexImage2D(GL_TEXTURE_2D, 0,
+ GL_RGBA, 0, 0, TexSize, TexSize, 0);
+ }
+ glFinish();
+}
+
+
+static void
+CopyTexSubImage(unsigned count)
+{
+ unsigned i;
+ for (i = 1; i < count; i++) {
+ /* draw something */
+ if (DrawPoint)
+ glDrawArrays(GL_POINTS, 0, 1);
+
+ /* copy sub texture */
+ if (TexSubImage4) {
+ /* four sub-copies */
+ GLsizei half = TexSize / 2;
+ /* lower-left */
+ glCopyTexSubImage2D(GL_TEXTURE_2D, 0,
+ 0, 0, 0, 0, half, half);
+ /* lower-right */
+ glCopyTexSubImage2D(GL_TEXTURE_2D, 0,
+ half, 0, half, 0, half, half);
+ /* upper-left */
+ glCopyTexSubImage2D(GL_TEXTURE_2D, 0,
+ 0, half, 0, half, half, half);
+ /* upper-right */
+ glCopyTexSubImage2D(GL_TEXTURE_2D, 0,
+ half, half, half, half, half, half);
+ }
+ else {
+ /* one big copy */
+ glCopyTexSubImage2D(GL_TEXTURE_2D, 0,
+ 0, 0, 0, 0, TexSize, TexSize);
+ }
+ }
+ glFinish();
+}
+
+
+/** Called from test harness/main */
+void
+PerfNextRound(void)
+{
+}
+
+
+/** Called from test harness/main */
+void
+PerfDraw(void)
+{
+ double rate, mbPerSec;
+ GLint sub, maxTexSize;
+
+ glGetIntegerv(GL_MAX_TEXTURE_SIZE, &maxTexSize);
+
+ /* loop over whole/sub tex copy */
+ for (sub = 0; sub < 2; sub++) {
+
+ /* loop over texture sizes */
+ for (TexSize = MinSize; TexSize <= MaxSize; TexSize *= 4) {
+
+ if (TexSize <= maxTexSize) {
+ GLint bytesPerImage = 4 * TexSize * TexSize;
+
+ if (sub == 0)
+ rate = PerfMeasureRate(CopyTexImage);
+ else {
+ /* setup empty dest texture */
+ glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA,
+ TexSize, TexSize, 0,
+ GL_RGBA, GL_UNSIGNED_BYTE, NULL);
+ rate = PerfMeasureRate(CopyTexSubImage);
+ }
+
+ mbPerSec = rate * bytesPerImage / (1024.0 * 1024.0);
+ }
+ else {
+ rate = 0.0;
+ mbPerSec = 0.0;
+ }
+
+ perf_printf(" glCopyTex%sImage(%d x %d): %.1f copies/sec, %.1f Mpixels/sec\n",
+ (sub ? "Sub" : ""), TexSize, TexSize, rate, mbPerSec);
+ }
+ }
+
+ exit(0);
+}
projects / mesa.git / commitdiff