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[Feat, Fix, Test] (MG_State, MG_Impl, MG_Backend, MG_Test): give ARB_viewport_array real 16-element indexed state instead of eight stubs and a viewport-0 echo

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swung0x48
2026-08-13 04:44:23 -04:00
parent 92d8f7269b
commit 5fbb17f6b9
11 changed files with 1091 additions and 111 deletions
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MobileGL/MG_Backend/DirectGLES/DirectGLES.cpp
+22 -6
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@@ -1600,7 +1600,7 @@ namespace MobileGL::MG_Backend::DirectGLES {
!g_hasSyncedRenderState || std::memcmp(currentBytes + kBlendSpanEnd, syncedBytes + kBlendSpanEnd,
sizeof(RenderStateParameters) - kBlendSpanEnd) != 0;
IntVec4 backendViewport = parameters.Viewport;
IntVec4 backendViewport = MG_State::pGLContext->GetViewport();
if (backendViewport.z() <= 0 || backendViewport.w() <= 0) {
Int surfaceWidth = 0;
Int surfaceHeight = 0;
@@ -1633,11 +1633,26 @@ namespace MobileGL::MG_Backend::DirectGLES {
SYNC_CAPABILITY(SampleMask, GL_SAMPLE_MASK);
SYNC_CAPABILITY(PolygonOffsetFill, GL_POLYGON_OFFSET_FILL);
SYNC_CAPABILITY(RasterizerDiscard, GL_RASTERIZER_DISCARD);
SYNC_CAPABILITY(ScissorTest, GL_SCISSOR_TEST);
SYNC_CAPABILITY(StencilTest, GL_STENCIL_TEST);
SYNC_CAPABILITY(CullFace, GL_CULL_FACE);
#undef SYNC_CAPABILITY
// GL_SCISSOR_TEST is per-viewport enable state (ARB_viewport_array), so it is a
// 16-bit mask and not a "<Name>Enabled" bool the macro above could key off. ES
// has exactly one scissor rectangle and one scissor enable, so only bit 0 - the
// index every ES draw rasterizes against - can be forwarded; a program that
// enables the test for viewport 3 alone gets viewport 0's answer here. That is
// the same limitation as the unemulated gl_ViewportIndex on this backend and is
// why the multi-viewport half of KHR-GL43.viewport_array stays red on Espryt.
{
const Bool scissorTest = (parameters.ScissorTestEnabledMask & 1u) != 0;
const Bool syncedScissorTest =
(g_syncedRenderStateParameters.ScissorTestEnabledMask & 1u) != 0;
if (forceFullPush || scissorTest != syncedScissorTest) {
scissorTest ? g_GLESFuncs.glEnable(GL_SCISSOR_TEST) : g_GLESFuncs.glDisable(GL_SCISSOR_TEST);
}
}
}
if (tailSpanDirty && g_GLESCapabilities.SupportsClipDistance) {
@@ -1864,8 +1879,8 @@ namespace MobileGL::MG_Backend::DirectGLES {
if (forceFullPush || parameters.DepthMask != g_syncedRenderStateParameters.DepthMask) {
g_GLESFuncs.glDepthMask(parameters.DepthMask ? GL_TRUE : GL_FALSE);
}
if (forceFullPush || parameters.DepthRange != g_syncedRenderStateParameters.DepthRange) {
g_GLESFuncs.glDepthRangef(parameters.DepthRange.x(), parameters.DepthRange.y());
if (forceFullPush || parameters.DepthRanges[0] != g_syncedRenderStateParameters.DepthRanges[0]) {
g_GLESFuncs.glDepthRangef(parameters.DepthRanges[0].x(), parameters.DepthRanges[0].y());
}
}
@@ -2003,7 +2018,7 @@ namespace MobileGL::MG_Backend::DirectGLES {
// everything drawn with GL_SCISSOR_TEST enabled before the app's first glScissor
// is clipped away - Minecraft 26.2 keeps only its unscissored sky and hand and
// loses the terrain and the whole GUI.
IntVec4 backendScissorBox = parameters.ScissorBox;
IntVec4 backendScissorBox = parameters.ScissorBoxes[0];
if (backendScissorBox.z() <= 0 || backendScissorBox.w() <= 0) {
Int surfaceWidth = 0;
Int surfaceHeight = 0;
@@ -4762,7 +4777,8 @@ namespace MobileGL::MG_Backend::DirectGLES {
// restores the app state on exit, tracked via the render-state shadow.
class ScopedScissorDisable {
public:
ScopedScissorDisable() : m_wasEnabled(RenderStateImpl::g_syncedRenderStateParameters.ScissorTestEnabled) {
ScopedScissorDisable()
: m_wasEnabled((RenderStateImpl::g_syncedRenderStateParameters.ScissorTestEnabledMask & 1u) != 0) {
if (m_wasEnabled) g_GLESFuncs.glDisable(GL_SCISSOR_TEST);
}
~ScopedScissorDisable() {