diff options
Diffstat (limited to 'progs/perf/copytex.c')
| -rw-r--r-- | progs/perf/copytex.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/progs/perf/copytex.c b/progs/perf/copytex.c new file mode 100644 index 0000000000..f7a6b8aec3 --- /dev/null +++ b/progs/perf/copytex.c @@ -0,0 +1,214 @@ +/* + * 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); +} |