| /* |
| * 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 glReadPixels speed. |
| * XXX also read into a PBO? |
| * XXX also read from FBOs? |
| * |
| * Brian Paul |
| * 23 Sep 2009 |
| */ |
| |
| #include <string.h> |
| #include <assert.h> |
| #include "glmain.h" |
| #include "common.h" |
| |
| int WinWidth = 1000, WinHeight = 1000; |
| |
| static GLuint VBO; |
| |
| static const GLboolean DrawPoint = GL_TRUE; |
| static const GLboolean BufferSubDataInHalves = GL_TRUE; |
| |
| static const GLfloat Vertex0[2] = { 0.0, 0.0 }; |
| |
| static GLenum HaveDepthStencil; |
| |
| static GLenum ReadFormat, ReadType; |
| static GLint ReadWidth, ReadHeight; |
| static GLvoid *ReadBuffer; |
| |
| |
| /** Called from test harness/main */ |
| void |
| PerfInit(void) |
| { |
| /* setup VBO */ |
| glGenBuffersARB(1, &VBO); |
| glBindBufferARB(GL_ARRAY_BUFFER_ARB, VBO); |
| glBufferDataARB(GL_ARRAY_BUFFER_ARB, sizeof(Vertex0), Vertex0, GL_STATIC_DRAW_ARB); |
| glVertexPointer(2, GL_FLOAT, sizeof(Vertex0), (void *) 0); |
| glEnableClientState(GL_VERTEX_ARRAY); |
| |
| glPixelStorei(GL_PACK_ALIGNMENT, 1); |
| |
| HaveDepthStencil = PerfExtensionSupported("GL_EXT_packed_depth_stencil"); |
| |
| glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT | GL_STENCIL_BUFFER_BIT); |
| glEnable(GL_DEPTH_TEST); |
| glEnable(GL_STENCIL_TEST); |
| } |
| |
| |
| static void |
| ReadPixels(unsigned count) |
| { |
| unsigned i; |
| for (i = 0; i < count; i++) { |
| /* read from random pos */ |
| GLint x, y; |
| |
| x = WinWidth - ReadWidth; |
| y = WinHeight - ReadHeight; |
| if (x > 0) |
| x = rand() % x; |
| if (y > 0) |
| y = rand() % y; |
| |
| if (DrawPoint) |
| glDrawArrays(GL_POINTS, 0, 1); |
| |
| glReadPixels(x, y, ReadWidth, ReadHeight, |
| ReadFormat, ReadType, ReadBuffer); |
| } |
| glFinish(); |
| } |
| |
| |
| static const GLsizei Sizes[] = { |
| 10, |
| 100, |
| 500, |
| 1000, |
| 0 |
| }; |
| |
| |
| static const struct { |
| GLenum format; |
| GLenum type; |
| const char *name; |
| GLuint pixel_size; |
| } DstFormats[] = { |
| { GL_RGBA, GL_UNSIGNED_BYTE, "RGBA/ubyte", 4 }, |
| { GL_BGRA, GL_UNSIGNED_BYTE, "BGRA/ubyte", 4 }, |
| { GL_RGB, GL_UNSIGNED_SHORT_5_6_5, "RGB/565", 2 }, |
| { GL_LUMINANCE, GL_UNSIGNED_BYTE, "L/ubyte", 1 }, |
| { GL_DEPTH_COMPONENT, GL_UNSIGNED_INT, "Z/uint", 4 }, |
| { GL_DEPTH_STENCIL_EXT, GL_UNSIGNED_INT_24_8_EXT, "Z+S/uint", 4 }, |
| { 0, 0, NULL, 0 } |
| }; |
| |
| |
| |
| /** Called from test harness/main */ |
| void |
| PerfNextRound(void) |
| { |
| } |
| |
| |
| /** Called from test harness/main */ |
| void |
| PerfDraw(void) |
| { |
| double rate, mbPerSec; |
| int fmt, sz; |
| |
| /* loop over formats */ |
| for (fmt = 0; DstFormats[fmt].format; fmt++) { |
| ReadFormat = DstFormats[fmt].format; |
| ReadType = DstFormats[fmt].type; |
| |
| /* loop over sizes */ |
| for (sz = 0; Sizes[sz]; sz++) { |
| int imgSize; |
| |
| ReadWidth = ReadHeight = Sizes[sz]; |
| imgSize = ReadWidth * ReadHeight * DstFormats[fmt].pixel_size; |
| ReadBuffer = malloc(imgSize); |
| |
| if (ReadFormat == GL_DEPTH_STENCIL_EXT && !HaveDepthStencil) { |
| rate = 0.0; |
| mbPerSec = 0.0; |
| } |
| else { |
| rate = PerfMeasureRate(ReadPixels); |
| mbPerSec = rate * imgSize / (1024.0 * 1024.0); |
| } |
| |
| perf_printf("glReadPixels(%d x %d, %s): %.1f images/sec, %.1f Mpixels/sec\n", |
| ReadWidth, ReadHeight, |
| DstFormats[fmt].name, rate, mbPerSec); |
| |
| free(ReadBuffer); |
| } |
| } |
| |
| exit(0); |
| } |