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##########################################################################
#
# Copyright 2011 Jose Fonseca
# Copyright 2008-2010 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 THE
# AUTHORS OR COPYRIGHT HOLDERS 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.
#
##########################################################################/
"""GLX tracing generator."""
from gltrace import GlTracer
from specs.stdapi import Module, API
from specs.glapi import glapi
from specs.glxapi import glxapi
from specs.glesapi import glesapi
class GlxTracer(GlTracer):
def isFunctionPublic(self, function):
# The symbols visible in libGL.so can vary, so expose them all
return True
getProcAddressFunctionNames = [
"glXGetProcAddress",
"glXGetProcAddressARB",
]
createContextFunctionNames = [
'glXCreateContext',
'glXCreateContextAttribsARB',
'glXCreateContextWithConfigSGIX',
'glXCreateNewContext',
]
destroyContextFunctionNames = [
'glXDestroyContext',
]
makeCurrentFunctionNames = [
'glXMakeCurrent',
'glXMakeContextCurrent',
'glXMakeCurrentReadSGI',
]
def traceFunctionImplBody(self, function):
if function.name in self.destroyContextFunctionNames:
print ' gltrace::releaseContext((uintptr_t)ctx);'
GlTracer.traceFunctionImplBody(self, function)
if function.name in self.createContextFunctionNames:
print ' if (_result != NULL)'
print ' gltrace::createContext((uintptr_t)_result);'
if function.name in self.makeCurrentFunctionNames:
print ' if (_result) {'
print ' if (ctx != NULL)'
print ' gltrace::setContext((uintptr_t)ctx);'
print ' else'
print ' gltrace::clearContext();'
print ' }'
if function.name == 'glXBindTexImageEXT':
# FIXME: glXBindTexImageEXT gets called frequently, so we should
# avoid recording the same data over and over again somehow, e.g.:
# - get the pixels before and after glXBindTexImageEXT, and only
# emit emitFakeTexture2D when it changes
# - keep a global hash of the pixels
# FIXME: Handle mipmaps
print r'''
unsigned glx_target = 0;
_glXQueryDrawable(display, drawable, GLX_TEXTURE_TARGET_EXT, &glx_target);
GLenum target;
switch (glx_target) {
// FIXME
//case GLX_TEXTURE_1D_EXT:
// target = GL_TEXTURE_1D;
// break;
case GLX_TEXTURE_2D_EXT:
target = GL_TEXTURE_2D;
break;
case GLX_TEXTURE_RECTANGLE_EXT:
target = GL_TEXTURE_RECTANGLE;
break;
default:
os::log("apitrace: warning: %s: unsupported GLX_TEXTURE_TARGET_EXT 0x%u\n", __FUNCTION__, glx_target);
target = GL_NONE;
break;
}
GLint level = 0;
GLint internalformat = GL_NONE;
_glGetTexLevelParameteriv(target, level, GL_TEXTURE_INTERNAL_FORMAT, &internalformat);
// XXX: GL_TEXTURE_INTERNAL_FORMAT cannot be trusted on NVIDIA
// -- it sometimes returns GL_BGRA, even though GL_BGR/BGRA is
// not a valid internal format.
switch (internalformat) {
case GL_BGR:
internalformat = GL_RGB;
break;
case GL_BGRA:
internalformat = GL_RGBA;
break;
}
GLint width = 0;
_glGetTexLevelParameteriv(target, level, GL_TEXTURE_WIDTH, &width);
GLint height = 0;
_glGetTexLevelParameteriv(target, level, GL_TEXTURE_HEIGHT, &height);
GLint border = 0;
// XXX: We always use GL_RGBA format to read the pixels because:
// - some implementations (Mesa) seem to return bogus results
// for GLX_TEXTURE_FORMAT_EXT
// - hardware usually stores GL_RGB with 32bpp, so it should be
// faster to read/write
// - it is more robust against GL_(UN)PACK_ALIGNMENT state
// changes
// The drawback is that traces will be slightly bigger.
GLenum format = GL_RGBA;
GLenum type = GL_UNSIGNED_BYTE;
if (target && internalformat && height && width) {
// FIXME: This assumes (UN)PACK state (in particular
// GL_(UN)PACK_ROW_LENGTH) is set to its defaults. We
// really should temporarily reset the state here (and emit
// according fake calls) to cope when its not. At very
// least we need a heads up warning that this will cause
// problems.
GLint alignment = 4;
GLint row_stride = _align(width * 4, alignment);
GLvoid * pixels = malloc(height * row_stride);
_glGetTexImage(target, level, format, type, pixels);
'''
self.emitFakeTexture2D()
print r'''
free(pixels);
}
'''
if __name__ == '__main__':
print
print '#include <stdlib.h>'
print '#include <string.h>'
print
print '#include "trace_writer_local.hpp"'
print
print '// To validate our prototypes'
print '#define GL_GLEXT_PROTOTYPES'
print '#define GLX_GLXEXT_PROTOTYPES'
print
print '#include "dlopen.hpp"'
print '#include "glproc.hpp"'
print '#include "glsize.hpp"'
print
module = Module()
module.mergeModule(glxapi)
module.mergeModule(glapi)
module.mergeModule(glesapi)
api = API()
api.addModule(module)
tracer = GlxTracer()
tracer.traceApi(api)
print r'''
/*
* Several applications, such as Quake3, use dlopen("libGL.so.1"), but
* LD_PRELOAD does not intercept symbols obtained via dlopen/dlsym, therefore
* we need to intercept the dlopen() call here, and redirect to our wrapper
* shared object.
*/
extern "C" PUBLIC
void * dlopen(const char *filename, int flag)
{
void *handle;
handle = _dlopen(filename, flag);
const char * libgl_filename = getenv("TRACE_LIBGL");
if (filename && handle && !libgl_filename) {
if (0) {
os::log("apitrace: warning: dlopen(\"%s\", 0x%x)\n", filename, flag);
}
// FIXME: handle absolute paths and other versions
if (strcmp(filename, "libGL.so") == 0 ||
strcmp(filename, "libGL.so.1") == 0) {
// Use the true libGL.so handle instead of RTLD_NEXT from now on
_libGlHandle = handle;
// Get the file path for our shared object, and use it instead
static int dummy = 0xdeedbeef;
Dl_info info;
if (dladdr(&dummy, &info)) {
os::log("apitrace: redirecting dlopen(\"%s\", 0x%x)\n", filename, flag);
handle = _dlopen(info.dli_fname, flag);
} else {
os::log("apitrace: warning: dladdr() failed\n");
}
}
}
return handle;
}
'''
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