From 77667266a7d08fd34881c1a2354d0bf9ad3f4d4e Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Thu, 26 Jan 2006 17:35:31 +0000 Subject: [PATCH] Test glTexSubImage and glCopyTexSubImage rate. Run with -nodraw to skip rendering of test quad to get "pure" sub-tex rate. --- progs/tests/Makefile | 1 + progs/tests/subtexrate.c | 343 +++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 344 insertions(+) create mode 100644 progs/tests/subtexrate.c diff --git a/progs/tests/Makefile b/progs/tests/Makefile index 49ea747..6cb5277 100644 --- a/progs/tests/Makefile +++ b/progs/tests/Makefile @@ -48,6 +48,7 @@ SOURCES = antialias.c \ sharedtex.c \ stencilwrap.c \ stencil_wrap.c \ + subtexrate.c \ tex1d.c \ texfilt.c \ texline.c \ diff --git a/progs/tests/subtexrate.c b/progs/tests/subtexrate.c new file mode 100644 index 0000000..f88fdc1 --- /dev/null +++ b/progs/tests/subtexrate.c @@ -0,0 +1,343 @@ +/* + * Measure glTexSubImage and glCopyTexSubImage speed + * + * Brian Paul + * 26 Jan 2006 + */ + +#define GL_GLEXT_PROTOTYPES +#include +#include +#include +#include +#include + +static GLint WinWidth = 1024, WinHeight = 512; +static GLint TexWidth = 512, TexHeight = 512; + +static GLuint TexObj = 1; + +static GLenum IntFormat = GL_RGBA8; +static GLenum ReadFormat = GL_RGBA; /* for glReadPixels */ + +static GLboolean DrawQuad = GL_TRUE; + + +/** + * draw teapot image, size TexWidth by TexHeight + */ +static void +DrawTestImage(void) +{ + GLfloat ar; + + glViewport(0, 0, TexWidth, TexHeight); + glScissor(0, 0, TexWidth, TexHeight); + glEnable(GL_SCISSOR_TEST); + + glClearColor(0.5, 0.5, 0.5, 0.0); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + ar = (float) TexWidth / TexHeight; + + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glFrustum(-ar, ar, -1.0, 1.0, 5.0, 25.0); + glMatrixMode(GL_MODELVIEW); + + glEnable(GL_LIGHTING); + glEnable(GL_LIGHT0); + glEnable(GL_DEPTH_TEST); + glFrontFace(GL_CW); + glPushMatrix(); + glRotatef(45, 1, 0, 0); + glRotatef(45, 0, 1, 0); + glutSolidTeapot(2.3); + glPopMatrix(); + glFrontFace(GL_CCW); + glDisable(GL_DEPTH_TEST); + glDisable(GL_LIGHTING); + + glDisable(GL_SCISSOR_TEST); + + glViewport(0, 0, WinWidth, WinHeight); + glFinish(); +} + + +/** + * Do glCopyTexSubImage2D call (update texture with framebuffer data) + * If doSubRect is true, do the copy in four pieces instead of all at once. + */ +static void +DoCopyTex(GLboolean doSubRect) +{ + if (doSubRect) { + /* copy in four parts */ + int w = TexWidth / 2, h = TexHeight / 2; + int x0 = 0, y0 = 0; + int x1 = w, y1 = h; +#if 1 + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, x0, y0, w, h); + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, x1, y0, w, h); + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, x0, y1, w, h); + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, x1, y1, w, h); +#else + /* scramble */ + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, x1, y1, w, h); + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, x0, y1, w, h); + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, x1, y0, w, h); + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, x0, y0, w, h); +#endif + } + else { + glCopyTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, 0, 0, TexWidth, TexHeight); + } +} + + +/** + * Do glTexSubImage2D (update texture w/ user data) + * If doSubRect, do update in four pieces, else all at once. + */ +static void +SubTex(GLboolean doSubRect, const GLubyte *image) +{ + if (doSubRect) { + /* four pieces */ + int w = TexWidth / 2, h = TexHeight / 2; + int x0 = 0, y0 = 0; + int x1 = w, y1 = h; + glPixelStorei(GL_UNPACK_ROW_LENGTH, TexWidth); + glPixelStorei(GL_UNPACK_ALIGNMENT, 1); + + glPixelStorei(GL_UNPACK_SKIP_ROWS, y0); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, x0); + glTexSubImage2D(GL_TEXTURE_2D, 0, x0, y0, w, h, + ReadFormat, GL_UNSIGNED_BYTE, image); + + glPixelStorei(GL_UNPACK_SKIP_ROWS, y0); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, x1); + glTexSubImage2D(GL_TEXTURE_2D, 0, x1, y0, w, h, + ReadFormat, GL_UNSIGNED_BYTE, image); + + glPixelStorei(GL_UNPACK_SKIP_ROWS, y1); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, x0); + glTexSubImage2D(GL_TEXTURE_2D, 0, x0, y1, w, h, + ReadFormat, GL_UNSIGNED_BYTE, image); + + glPixelStorei(GL_UNPACK_SKIP_ROWS, y1); + glPixelStorei(GL_UNPACK_SKIP_PIXELS, x1); + glTexSubImage2D(GL_TEXTURE_2D, 0, x1, y1, w, h, + ReadFormat, GL_UNSIGNED_BYTE, image); + } + else { + /* all at once */ + glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, TexWidth, TexHeight, + ReadFormat, GL_UNSIGNED_BYTE, image); + } +} + + +/** + * Measure gl[Copy]TexSubImage rate. + * This actually also includes time to render a quad and SwapBuffers. + */ +static void +RunTest(GLboolean copyTex, GLboolean doSubRect) +{ + double t1, t0 = glutGet(GLUT_ELAPSED_TIME) / 1000.0; + int iters = 0; + float copyRate, mbRate; + float rot = 0.0; + int bpp, r, g, b, a; + int w, h; + GLubyte *image = NULL; + + glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_RED_SIZE, &r); + glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_GREEN_SIZE, &g); + glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_BLUE_SIZE, &b); + glGetTexLevelParameteriv(GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &a); + bpp = (r + g + b + a) / 8; + + if (!copyTex) { + /* read image from frame buffer */ + image = (GLubyte *) malloc(TexWidth * TexHeight * bpp); + glPixelStorei(GL_PACK_ALIGNMENT, 1); + glReadPixels(0, 0, TexWidth, TexHeight, + ReadFormat, GL_UNSIGNED_BYTE, image); + } + + glEnable(GL_TEXTURE_2D); + glViewport(WinWidth / 2, 0, WinWidth / 2, WinHeight); + + do { + if (copyTex) + /* Framebuffer -> Texture */ + DoCopyTex(doSubRect); + else { + /* Main Mem -> Texture */ + SubTex(doSubRect, image); + } + + /* draw textured quad */ + if (DrawQuad) { + glPushMatrix(); + glRotatef(rot, 0, 0, 1); + glTranslatef(1, 0, 0); + glBegin(GL_POLYGON); + glTexCoord2f(0, 0); glVertex2f(-1, -1); + glTexCoord2f(1, 0); glVertex2f( 1, -1); + glTexCoord2f(1, 1); glVertex2f( 1, 1); + glTexCoord2f(0, 1); glVertex2f(-1, 1); + glEnd(); + glPopMatrix(); + } + + iters++; + rot += 2.0; + + t1 = glutGet(GLUT_ELAPSED_TIME) / 1000.0; + glutSwapBuffers(); + } while (t1 - t0 < 5.0); + + glDisable(GL_TEXTURE_2D); + if (image) + free(image); + + if (doSubRect) { + w = TexWidth / 2; + h = TexHeight / 2; + iters *= 4; + } + else { + w = TexWidth; + h = TexHeight; + } + + copyRate = iters / (t1 - t0); + mbRate = w * h * bpp * copyRate / (1024 * 1024); + + if (copyTex) + printf("glCopyTexSubImage: %d x %d, %d Bpp:\n", w, h, bpp); + else + printf("glTexSubImage: %d x %d, %d Bpp:\n", w, h, bpp); + printf(" %d calls in %.2f = %.2f calls/sec, %.2f MB/s\n", + iters, t1-t0, copyRate, mbRate); +} + + +static void +Draw(void) +{ + glClearColor(0.2, 0.2, 0.8, 0); + glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); + + DrawTestImage(); + + RunTest(GL_FALSE, GL_FALSE); + RunTest(GL_FALSE, GL_TRUE); + RunTest(GL_TRUE, GL_FALSE); + RunTest(GL_TRUE, GL_TRUE); + + glutSwapBuffers(); + + printf("exiting\n"); + exit(0); +} + + +static void +Reshape(int width, int height) +{ + glViewport(0, 0, width, height); + glMatrixMode(GL_PROJECTION); + glLoadIdentity(); + glFrustum(-1.0, 1.0, -1.0, 1.0, 5.0, 25.0); + glMatrixMode(GL_MODELVIEW); + glLoadIdentity(); + glTranslatef(0.0, 0.0, -15.0); +} + + +static void +Key(unsigned char key, int x, int y) +{ + (void) x; + (void) y; + switch (key) { + case 27: + exit(0); + break; + } + glutPostRedisplay(); +} + + +static void +SpecialKey(int key, int x, int y) +{ + (void) x; + (void) y; + switch (key) { + case GLUT_KEY_UP: + break; + case GLUT_KEY_DOWN: + break; + case GLUT_KEY_LEFT: + break; + case GLUT_KEY_RIGHT: + break; + } + glutPostRedisplay(); +} + + +static void +Init(void) +{ + /* create initial, empty teximage */ + glBindTexture(GL_TEXTURE_2D, TexObj); + glTexImage2D(GL_TEXTURE_2D, 0, IntFormat, TexWidth, TexHeight, 0, + GL_RGBA, GL_UNSIGNED_BYTE, NULL); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); + glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); + glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); +} + + + +static void +ParseArgs(int argc, char *argv[]) +{ + int i; + for (i = 1; i < argc; i++) { + if (strcmp(argv[i], "-nodraw") == 0) + DrawQuad = GL_FALSE; + } +} + + +int +main(int argc, char *argv[]) +{ + GLint mode = GLUT_RGB | GLUT_ALPHA | GLUT_DOUBLE | GLUT_DEPTH; + glutInit(&argc, argv); + + ParseArgs(argc, argv); + + glutInitWindowPosition(0, 0); + glutInitWindowSize(WinWidth, WinHeight); + glutInitDisplayMode(mode); + glutCreateWindow(argv[0]); + glutReshapeFunc(Reshape); + glutKeyboardFunc(Key); + glutSpecialFunc(SpecialKey); + glutDisplayFunc(Draw); + + printf("GL_RENDERER: %s\n", (char *) glGetString(GL_RENDERER)); + Init(); + + glutMainLoop(); + return 0; +} -- 2.7.4