Allow setting alpha value for ignorezero layer rule (#2477)

* rename ignorezero to ignorealpha

* allow setting ignorealpha value

This commit allows setting a float value (0-1) for the ignorealpha layer rule.
Does not yet have error handling; invalid ignorealpha layer rule will crash Hyprland.

* add brackets i forgot to add

* prevent crash with invalid ignorealpha value

prevents hyprland from immediately crashing with invalid ignorealpha layer rule
does not log

* don't try to set ignoreAlphaValue if alpha value not specified

* add catch to try, reintroduce ignorezero

- added catch after try cuz i was an idiot
- re-add ignorezero as an alternative to ignorealpha to not introduce a breaking change

* add logging for failed ignorealpha layer rule

* fix get ignorealpha's get VALUE

* check npos and use empty()

* rename VALUE cuz no longer const

* format Shader.hpp

1 files changed, 5 insertions, 3 deletions

diff --git a/src/render/Renderer.cpp b/src/render/Renderer.cpp
index 7552b17c..6d995875 100644
--- a/src/render/Renderer.cpp
+++ b/src/render/Renderer.cpp
@@ -392,10 +392,12 @@ void CHyprRenderer::renderLayer(SLayerSurface* pLayer, CMonitor* pMonitor, times
     renderdata.h                     = pLayer->geometry.height;
     renderdata.blockBlurOptimization = pLayer->layer == ZWLR_LAYER_SHELL_V1_LAYER_BOTTOM || pLayer->layer == ZWLR_LAYER_SHELL_V1_LAYER_BACKGROUND;
 
-    if (pLayer->ignoreZero)
-        g_pHyprOpenGL->m_RenderData.discardMode |= DISCARD_ALPHAZERO;
+    if (pLayer->ignoreAlpha) {
+        g_pHyprOpenGL->m_RenderData.discardMode |= DISCARD_ALPHA;
+        g_pHyprOpenGL->m_RenderData.discardOpacity = pLayer->ignoreAlphaValue;
+    }
     wlr_surface_for_each_surface(pLayer->layerSurface->surface, renderSurface, &renderdata);
-    g_pHyprOpenGL->m_RenderData.discardMode &= ~DISCARD_ALPHAZERO;
+    g_pHyprOpenGL->m_RenderData.discardMode &= ~DISCARD_ALPHA;
 
     renderdata.squishOversized = false; // don't squish popups
     renderdata.dontRound       = true;