277 lines
7.0 KiB
C
277 lines
7.0 KiB
C
/*
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* Copyright (C) 2009 VMware, Inc. All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* VMWARE BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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/**
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* Measure simple vertex processing rate via:
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* - immediate mode
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* - vertex arrays
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* - VBO vertex arrays
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* - glDrawElements
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* - VBO glDrawElements
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* - glDrawRangeElements
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* - VBO glDrawRangeElements
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*
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* Brian Paul
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* 16 Sep 2009
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*/
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#include <assert.h>
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#include <string.h>
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#include "glmain.h"
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#include "common.h"
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#define MAX_VERTS (100 * 100)
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/** glVertex2/3/4 size */
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#define VERT_SIZE 4
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int WinWidth = 500, WinHeight = 500;
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static GLuint VertexBO, ElementBO;
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static unsigned NumVerts = MAX_VERTS;
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static unsigned VertBytes = VERT_SIZE * sizeof(float);
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static float *VertexData = NULL;
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static unsigned NumElements = MAX_VERTS;
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static GLuint *Elements = NULL;
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/**
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* Load VertexData buffer with a 2-D grid of points in the range [-1,1]^2.
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*/
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static void
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InitializeVertexData(void)
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{
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unsigned i;
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float x = -1.0, y = -1.0;
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float dx = 2.0 / 100;
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float dy = 2.0 / 100;
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VertexData = (float *) malloc(NumVerts * VertBytes);
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for (i = 0; i < NumVerts; i++) {
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VertexData[i * VERT_SIZE + 0] = x;
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VertexData[i * VERT_SIZE + 1] = y;
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VertexData[i * VERT_SIZE + 2] = 0.0;
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VertexData[i * VERT_SIZE + 3] = 1.0;
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x += dx;
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if (x > 1.0) {
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x = -1.0;
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y += dy;
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}
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}
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Elements = (GLuint *) malloc(NumVerts * sizeof(GLuint));
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for (i = 0; i < NumVerts; i++) {
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Elements[i] = NumVerts - i - 1;
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}
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}
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/** Called from test harness/main */
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void
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PerfInit(void)
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{
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InitializeVertexData();
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/* setup VertexBO */
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glGenBuffersARB(1, &VertexBO);
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glBindBufferARB(GL_ARRAY_BUFFER_ARB, VertexBO);
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glBufferDataARB(GL_ARRAY_BUFFER_ARB,
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NumVerts * VertBytes, VertexData, GL_STATIC_DRAW_ARB);
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glEnableClientState(GL_VERTEX_ARRAY);
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/* setup ElementBO */
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glGenBuffersARB(1, &ElementBO);
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER_ARB, ElementBO);
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glBufferDataARB(GL_ELEMENT_ARRAY_BUFFER_ARB,
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NumElements * sizeof(GLuint), Elements, GL_STATIC_DRAW_ARB);
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}
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static void
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DrawImmediate(unsigned count)
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{
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unsigned i;
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
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glBindBufferARB(GL_ARRAY_BUFFER, 0);
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for (i = 0; i < count; i++) {
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unsigned j;
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glBegin(GL_POINTS);
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for (j = 0; j < NumVerts; j++) {
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#if VERT_SIZE == 4
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glVertex4fv(VertexData + j * 4);
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#elif VERT_SIZE == 3
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glVertex3fv(VertexData + j * 3);
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#elif VERT_SIZE == 2
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glVertex2fv(VertexData + j * 2);
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#else
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abort();
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#endif
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}
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glEnd();
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}
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glFinish();
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PerfSwapBuffers();
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}
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static void
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DrawArraysMem(unsigned count)
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{
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unsigned i;
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
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glBindBufferARB(GL_ARRAY_BUFFER, 0);
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glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, VertexData);
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for (i = 0; i < count; i++) {
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glDrawArrays(GL_POINTS, 0, NumVerts);
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}
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glFinish();
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PerfSwapBuffers();
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}
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static void
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DrawArraysVBO(unsigned count)
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{
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unsigned i;
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
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glBindBufferARB(GL_ARRAY_BUFFER, VertexBO);
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glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, (void *) 0);
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for (i = 0; i < count; i++) {
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glDrawArrays(GL_POINTS, 0, NumVerts);
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}
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glFinish();
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PerfSwapBuffers();
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}
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static void
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DrawElementsMem(unsigned count)
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{
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unsigned i;
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
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glBindBufferARB(GL_ARRAY_BUFFER, 0);
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glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, VertexData);
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for (i = 0; i < count; i++) {
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glDrawElements(GL_POINTS, NumVerts, GL_UNSIGNED_INT, Elements);
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}
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glFinish();
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PerfSwapBuffers();
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}
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static void
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DrawElementsBO(unsigned count)
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{
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unsigned i;
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, ElementBO);
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glBindBufferARB(GL_ARRAY_BUFFER, VertexBO);
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glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, (void *) 0);
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for (i = 0; i < count; i++) {
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glDrawElements(GL_POINTS, NumVerts, GL_UNSIGNED_INT, (void *) 0);
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}
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glFinish();
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PerfSwapBuffers();
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}
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static void
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DrawRangeElementsMem(unsigned count)
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{
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unsigned i;
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, 0);
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glBindBufferARB(GL_ARRAY_BUFFER, 0);
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glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, VertexData);
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for (i = 0; i < count; i++) {
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glDrawRangeElements(GL_POINTS, 0, NumVerts - 1,
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NumVerts, GL_UNSIGNED_INT, Elements);
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}
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glFinish();
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PerfSwapBuffers();
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}
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static void
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DrawRangeElementsBO(unsigned count)
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{
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unsigned i;
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glBindBufferARB(GL_ELEMENT_ARRAY_BUFFER, ElementBO);
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glBindBufferARB(GL_ARRAY_BUFFER, VertexBO);
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glVertexPointer(VERT_SIZE, GL_FLOAT, VertBytes, (void *) 0);
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for (i = 0; i < count; i++) {
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glDrawRangeElements(GL_POINTS, 0, NumVerts - 1,
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NumVerts, GL_UNSIGNED_INT, (void *) 0);
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}
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glFinish();
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PerfSwapBuffers();
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}
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void
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PerfNextRound(void)
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{
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}
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/** Called from test harness/main */
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void
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PerfDraw(void)
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{
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double rate;
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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perf_printf("Vertex rate (%d x Vertex%df)\n", NumVerts, VERT_SIZE);
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rate = PerfMeasureRate(DrawImmediate);
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rate *= NumVerts;
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perf_printf(" Immediate mode: %s verts/sec\n", PerfHumanFloat(rate));
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rate = PerfMeasureRate(DrawArraysMem);
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rate *= NumVerts;
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perf_printf(" glDrawArrays: %s verts/sec\n", PerfHumanFloat(rate));
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rate = PerfMeasureRate(DrawArraysVBO);
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rate *= NumVerts;
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perf_printf(" VBO glDrawArrays: %s verts/sec\n", PerfHumanFloat(rate));
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rate = PerfMeasureRate(DrawElementsMem);
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rate *= NumVerts;
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perf_printf(" glDrawElements: %s verts/sec\n", PerfHumanFloat(rate));
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rate = PerfMeasureRate(DrawElementsBO);
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rate *= NumVerts;
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perf_printf(" VBO glDrawElements: %s verts/sec\n", PerfHumanFloat(rate));
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rate = PerfMeasureRate(DrawRangeElementsMem);
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rate *= NumVerts;
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perf_printf(" glDrawRangeElements: %s verts/sec\n", PerfHumanFloat(rate));
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rate = PerfMeasureRate(DrawRangeElementsBO);
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rate *= NumVerts;
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perf_printf(" VBO glDrawRangeElements: %s verts/sec\n", PerfHumanFloat(rate));
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exit(0);
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}
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