b677b99db5
x11_surface_get_present_modes() is currently asserting that the number of
elements in pPresentModeCount must be greater than or equal to the number
of present modes available. This is buggy because pPresentModeCount
elements are later copied from the internal modes' array, so if
pPresentModeCount is greater, it will overflow it.
On top of that, this assertion violates the spec. From the Vulkan 1.0
(revision 32, with KHR extensions), page 581 of the PDF:
"If the value of pPresentModeCount is less than the number of
presentation modes supported, at most pPresentModeCount values will be
written. If pPresentModeCount is smaller than the number of
presentation modes supported for the given surface, VK_INCOMPLETE
will be returned instead of VK_SUCCESS to indicate that not all the
available values were returned."
So, the correct behavior is: if pPresentModeCount is greater than the
internal number of formats, it is clamped to that many present modes. But
if it is lesser than that, then pPresentModeCount elements are copied,
and the call returns VK_INCOMPLETE.
This fix is similar (but simpler and more readable) than the one I provided
in 750d8cad72 for vkGetPhysicalDeviceSurfaceFormatsKHR, which was suffering
from the same problem.
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
File: docs/README.WIN32 Last updated: 21 June 2013 Quick Start ----- ----- Windows drivers are build with SCons. Makefiles or Visual Studio projects are no longer shipped or supported. Run scons libgl-gdi to build gallium based GDI driver. This will work both with MSVS or Mingw. Windows Drivers ------- ------- At this time, only the gallium GDI driver is known to work. Source code also exists in the tree for other drivers in src/mesa/drivers/windows, but the status of this code is unknown. Recipe ------ Building on windows requires several open-source packages. These are steps that work as of this writing. - install python 2.7 - install scons (latest) - install mingw, flex, and bison - install pywin32 from here: http://www.lfd.uci.edu/~gohlke/pythonlibs get pywin32-218.4.win-amd64-py2.7.exe - install git - download mesa from git see http://www.mesa3d.org/repository.html - run scons General ------- After building, you can copy the above DLL files to a place in your PATH such as $SystemRoot/SYSTEM32. If you don't like putting things in a system directory, place them in the same directory as the executable(s). Be careful about accidentially overwriting files of the same name in the SYSTEM32 directory. The DLL files are built so that the external entry points use the stdcall calling convention. Static LIB files are not built. The LIB files that are built with are the linker import files associated with the DLL files. The si-glu sources are used to build the GLU libs. This was done mainly to get the better tessellator code. If you have a Windows-related build problem or question, please post to the mesa-dev or mesa-users list.