我有GLX_EXT_texture_from_pixmap的問題。根據EXT_texture_from_pixmap specification和一個例子,我可以使用GLXPixmap作爲OpenGL紋理。 然而,在連接階段,我得到:如何在C中使用GLX_EXT_texture_from_pixmap將X11 Pixmap用作OpenGL紋理?
$ gcc -Wall -o uwm main.c -lX11 -lXext -lXcomposite -lXfixes -lGL -lGLU
...
main.c:98:2: warning: implicit declaration of function 'glXBindTexImageEXT' [-Wimplicit-function-declaration]
main.c:(.text+0x651): undefined reference to `glXBindTexImageEXT'
我已經檢查:
GL/glx.h定義glXBindTexImageEXT ...:
$ grep -l glXBindTexImageEXT /usr/include/GL/* /usr/include/GL/glxext.h /usr/include/GL/glx.h
...這是Fedora 16上的
mesa-libGL-devel
包的一部分:$ rpm -qf /usr/include/GL/glx.h mesa-libGL-devel-7.11.2-3.fc16.x86_64
...還含有libGL.so這(我認爲)應該包含glXBindTexImageEXT符號:
$ rpm -ql mesa-libGL-devel-7.11.2-3.fc16.x86_64 | grep '.so$' /usr/lib64/libGL.so
...但它不是:
$ objdump -T /usr/lib64/libGL.so | grep glXBindTexImageEXT $ nm /usr/lib64/libGL.so nm: /usr/lib64/libGL.so: no symbols
然而Gnome 3在此機器上工作與合成啓用。
我的機器有GLX_EXT_texture_from_pixmap擴展:
$ glxinfo | grep GLX_EXT_texture_from_pixmap -B 10
name of display: :0.0
display: :0 screen: 0
direct rendering: Yes
server glx vendor string: SGI
server glx version string: 1.4
server glx extensions:
GLX_ARB_multisample, GLX_EXT_import_context, GLX_EXT_texture_from_pixmap,
--
GLX_SGIX_visual_select_group, GLX_INTEL_swap_event
client glx vendor string: Mesa Project and SGI
client glx version string: 1.4
client glx extensions:
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_EXT_framebuffer_sRGB,
GLX_MESA_copy_sub_buffer, GLX_MESA_multithread_makecurrent,
GLX_MESA_swap_control, GLX_OML_swap_method, GLX_OML_sync_control,
GLX_SGI_make_current_read, GLX_SGI_swap_control, GLX_SGI_video_sync,
GLX_SGIS_multisample, GLX_SGIX_fbconfig, GLX_SGIX_pbuffer,
GLX_SGIX_visual_select_group, GLX_EXT_texture_from_pixmap,
GLX_INTEL_swap_event
GLX version: 1.4
GLX extensions:
GLX_ARB_get_proc_address, GLX_ARB_multisample, GLX_EXT_import_context,
GLX_EXT_visual_info, GLX_EXT_visual_rating, GLX_MESA_copy_sub_buffer,
GLX_MESA_multithread_makecurrent, GLX_MESA_swap_control,
GLX_OML_swap_method, GLX_OML_sync_control, GLX_SGI_make_current_read,
GLX_SGI_swap_control, GLX_SGI_video_sync, GLX_SGIS_multisample,
GLX_SGIX_fbconfig, GLX_SGIX_pbuffer, GLX_SGIX_visual_select_group,
GLX_EXT_texture_from_pixmap
所以我的問題是:
是否預期爲libGL.so 不包含啓用glXBindTexImageEXT despiteGLX_EXT_texture_from_pixmap(至少在ScientificLinux 6.2,Fedora 16,Ubuntu 10.04)。
您能否向我解釋一下使用X11 Pixmap作爲OpenGL紋理的可能方式?