LOVE/love
1
0
Fork 0
mirror of https://github.com/love2d/love.git synced 2026-08-15 15:51:12 +02:00
Code Issues Packages Projects Releases Wiki Activity

Added comments to the Bugs struct in OpenGL.h detailing some driver bugs that have workarounds that don't need conditional codepaths.

Browse Source
This commit is contained in:
Alex Szpakowski
2016-01-10 16:12:51 -04:00
parent 6d6d805858
commit 8a59743481
1 changed files with 29 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/modules/graphics/opengl/OpenGL.h
+29 -9
View File
@@ -171,16 +171,36 @@ public:
struct Bugs
{
// On AMD's Windows (and probably Linux) drivers,
// glBindFramebuffer + glClear + glBindFramebuffer + draw(fbo_tex) won't
// work unless there's some kind of draw or state change which causes
// the texture's contents to update (just drawing the texture won't
// always do it).
// Activating shader program 0 and then activating the actual program
// seems to always 'fix' it for me.
// Bug observed January 2016 with multiple AMD GPUs and driver versions.
// https://love2d.org/forums/viewtopic.php?f=4&t=81496
/**
* On AMD's Windows (and probably Linux) drivers,
* glBindFramebuffer + glClear + glBindFramebuffer + draw(fbo_tex) won't
* work unless there's some kind of draw or state change which causes
* the texture's contents to update (just drawing the texture won't
* always do it).
* Activating shader program 0 and then activating the actual program
* seems to always 'fix' it for me.
* Bug observed January 2016 with multiple AMD GPUs and driver versions.
* https://love2d.org/forums/viewtopic.php?f=4&t=81496
**/
bool clearRequiresDriverTextureStateUpdate;
/**
* Other bugs which have workarounds that don't use conditional code at
* the moment:
*
* Kepler nvidia GPUs in at least OS X 10.10 and 10.11 fail to render
* geometry with glDrawElements if index data comes from a Buffer
* Object but and vertex data doesn't. One workaround is to use a
* CPU-side index array when there's also a CPU-side vertex array.
* https://love2d.org/forums/viewtopic.php?f=4&t=81401&start=10
*
* Some android drivers don't seem to initialize the sampler index
* values of sampler uniforms in shaders to 0 (which is required by the
* GLSL ES specification) when linking the shader program. One
* workaround is to always set the values of said sampler uniforms to 0
* just after linking the shader program.
* https://love2d.org/forums/viewtopic.php?f=4&t=81458
**/
} bugs;
OpenGL();