From 4fb995084e1b4b629667f09331adf060aa0fac4c Mon Sep 17 00:00:00 2001 From: Brian Paul Date: Fri, 2 Sep 2005 13:42:49 +0000 Subject: Prototype implementation of new GL_EXT_timer_query extension (not finalized yet). Extends the query mechanism to query elapsed time while rendering. --- src/mesa/drivers/x11/xm_dd.c | 84 ++++++++++++++++++++++++++++++++++++++++++-- 1 file changed, 81 insertions(+), 3 deletions(-) (limited to 'src/mesa/drivers/x11/xm_dd.c') diff --git a/src/mesa/drivers/x11/xm_dd.c b/src/mesa/drivers/x11/xm_dd.c index 7ab09d444d6..76dec19f531 100644 --- a/src/mesa/drivers/x11/xm_dd.c +++ b/src/mesa/drivers/x11/xm_dd.c @@ -1,8 +1,8 @@ /* * Mesa 3-D graphics library - * Version: 6.3 + * Version: 6.5 * - * Copyright (C) 1999-2004 Brian Paul All Rights Reserved. + * Copyright (C) 1999-2005 Brian Paul 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"), @@ -1130,6 +1130,78 @@ xmesa_viewport(GLcontext *ctx, GLint x, GLint y, GLsizei w, GLsizei h) } +#if ENABLE_EXT_timer_query + +/* + * The GL_EXT_timer_query extension is not enabled for the XServer + * indirect renderer. Not sure about how/if wrapping of gettimeofday() + * is done, etc. + */ + +struct xmesa_query_object +{ + struct gl_query_object Base; + struct timeval StartTime; +}; + + +static struct gl_query_object * +xmesa_new_query_object(GLcontext *ctx, GLuint id) +{ + struct xmesa_query_object *q = CALLOC_STRUCT(xmesa_query_object); + if (q) { + q->Base.Id = id; + q->Base.Ready = GL_TRUE; + } + return &q->Base; +} + + +static void +xmesa_begin_query(GLcontext *ctx, GLenum target, struct gl_query_object *q) +{ + if (target == GL_TIME_ELAPSED_EXT) { + struct xmesa_query_object *xq = (struct xmesa_query_object *) q; + (void) gettimeofday(&xq->StartTime, NULL); + } +} + + +/** + * Return the difference between the two given times in microseconds. + */ +static unsigned int +time_diff(const struct timeval *t0, const struct timeval *t1) +{ + time_t seconds0 = t0->tv_sec & 0xff; /* 0 .. 255 seconds */ + time_t seconds1 = t1->tv_sec & 0xff; /* 0 .. 255 seconds */ + suseconds_t useconds0 = seconds0 * 1000000 + t0->tv_usec; + suseconds_t useconds1 = seconds1 * 1000000 + t1->tv_usec; + return useconds1 - useconds0; +} + + +static void +xmesa_end_query(GLcontext *ctx, GLenum target, struct gl_query_object *q) +{ + if (target == GL_TIME_ELAPSED_EXT) { + struct xmesa_query_object *xq = (struct xmesa_query_object *) q; + struct timeval endTime; + unsigned int dt; + (void) gettimeofday(&endTime, NULL); + dt = time_diff(&xq->StartTime, &endTime); + /* clamp if we'd overflow a 32-bit unsigned int */ + if (dt >= 0xffffffffU / 1000U) + q->Result = 0xffffffffU; + else + q->Result = dt * 1000; /* result is in nanoseconds! */ + } + q->Ready = GL_TRUE; +} + +#endif /* ENABLE_timer_query */ + + /** * Initialize the device driver function table with the functions * we implement in this driver. @@ -1162,11 +1234,17 @@ xmesa_init_driver_functions( XMesaVisual xmvisual, } #endif driver->TestProxyTexImage = test_proxy_teximage; -#if SWTC +#if ENABLE_EXT_texure_compression_s3tc driver->ChooseTextureFormat = choose_tex_format; #else (void) choose_tex_format; #endif + +#if ENABLE_EXT_timer_query + driver->NewQueryObject = xmesa_new_query_object; + driver->BeginQuery = xmesa_begin_query; + driver->EndQuery = xmesa_end_query; +#endif } -- cgit v1.2.3