swung0x48/MobileGL
1
0
Fork 0
mirror of https://github.com/MobileGL-Dev/MobileGL synced 2026-09-12 06:08:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

[Fix, Test] (MG_Util, MG_IntegrationTest): advertise the GL 4.3 VIEWPORT_BOUNDS_RANGE floor on a GLES driver that has no such query, instead of a range admitting no origin

Browse Source
This commit is contained in:
swung0x48
2026-08-13 04:44:23 -04:00
parent f41403e227
commit 42ad62b54c
5 changed files with 81 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files
MobileGL/MG_Util/BackendLoaders/OpenGL/Loader.cpp
+11 -3
View File
@@ -1000,7 +1000,11 @@ namespace MobileGL::MG_Util::BackendLoader {
GLfloat smoothLineWidthRange[2] = {1.0f, 1.0f};
GLfloat smoothLineWidthGranularity = 1.0f;
GLfloat aliasedPointSizeRange[2] = {1.0f, 1.0f};
GLfloat viewportBoundsRange[2] = {0.0f, 0.0f};
// GL 4.6 core table 23.60 sets the MINIMUM VIEWPORT_BOUNDS_RANGE at [-32768, 32767], and
// KHR-GL43.viewport_array.queries asserts exactly that floor. GLES has no such query, so
// the glGetFloatv below raises GL_INVALID_ENUM and leaves this untouched - starting it at
// {0, 0} advertised a range that admits no viewport origin at all.
GLfloat viewportBoundsRange[2] = {-32768.0f, 32767.0f};
GLint maxViewportDims[2] = {16384, 16384};
GLint viewportSubpixelBits = 0;
GLint max3DTextureSize = 16384;
@@ -1289,8 +1293,12 @@ namespace MobileGL::MG_Util::BackendLoader {
caps.MaxViewports = maxViewports;
caps.MaxViewportWidth = maxViewportDims[0];
caps.MaxViewportHeight = maxViewportDims[1];
caps.ViewportBoundsRangeMin = viewportBoundsRange[0];
caps.ViewportBoundsRangeMax = viewportBoundsRange[1];
// Only ever WIDER than the core minimum: a driver that answered the query is allowed to
// exceed the floor but never to sit inside it, and a driver that rejected the query left
// the floor in place. Written as a clamp rather than a plain assignment so a partial
// write (one component answered, the other not) cannot narrow the range either.
caps.ViewportBoundsRangeMin = std::min(viewportBoundsRange[0], -32768.0f);
caps.ViewportBoundsRangeMax = std::max(viewportBoundsRange[1], 32767.0f);
caps.ViewportSubpixelBits = viewportSubpixelBits;
caps.MinFragmentInterpolationOffset =
std::isfinite(minFragmentInterpolationOffset) && minFragmentInterpolationOffset <= -0.5f