renderer: Added a pointer position uniform to the screen shader. (#10821)

1 files changed, 19 insertions, 3 deletions

diff --git a/src/render/OpenGL.cpp b/src/render/OpenGL.cpp
index de643485..25f5e291 100644
--- a/src/render/OpenGL.cpp
+++ b/src/render/OpenGL.cpp
@@ -10,6 +10,7 @@
 #include "../helpers/MiscFunctions.hpp"
 #include "../config/ConfigValue.hpp"
 #include "../config/ConfigManager.hpp"
+#include "../managers/PointerManager.hpp"
 #include "../desktop/LayerSurface.hpp"
 #include "../protocols/LayerShell.hpp"
 #include "../protocols/core/Compositor.hpp"
@@ -1224,9 +1225,10 @@ void CHyprOpenGLImpl::applyScreenShader(const std::string& path) {
         return;
     }
 
-    m_finalScreenShader.uniformLocations[SHADER_PROJ] = glGetUniformLocation(m_finalScreenShader.program, "proj");
-    m_finalScreenShader.uniformLocations[SHADER_TEX]  = glGetUniformLocation(m_finalScreenShader.program, "tex");
-    m_finalScreenShader.uniformLocations[SHADER_TIME] = glGetUniformLocation(m_finalScreenShader.program, "time");
+    m_finalScreenShader.uniformLocations[SHADER_POINTER] = glGetUniformLocation(m_finalScreenShader.program, "pointer_position");
+    m_finalScreenShader.uniformLocations[SHADER_PROJ]    = glGetUniformLocation(m_finalScreenShader.program, "proj");
+    m_finalScreenShader.uniformLocations[SHADER_TEX]     = glGetUniformLocation(m_finalScreenShader.program, "tex");
+    m_finalScreenShader.uniformLocations[SHADER_TIME]    = glGetUniformLocation(m_finalScreenShader.program, "time");
     if (m_finalScreenShader.uniformLocations[SHADER_TIME] != -1)
         m_finalScreenShader.initialTime = m_globalTimer.getSeconds();
     m_finalScreenShader.uniformLocations[SHADER_WL_OUTPUT] = glGetUniformLocation(m_finalScreenShader.program, "wl_output");
@@ -1241,6 +1243,12 @@ void CHyprOpenGLImpl::applyScreenShader(const std::string& path) {
     }
     m_finalScreenShader.uniformLocations[SHADER_TEX_ATTRIB] = glGetAttribLocation(m_finalScreenShader.program, "texcoord");
     m_finalScreenShader.uniformLocations[SHADER_POS_ATTRIB] = glGetAttribLocation(m_finalScreenShader.program, "pos");
+    if (m_finalScreenShader.uniformLocations[SHADER_POINTER] != -1 && *PDT != 0 && !g_pHyprRenderer->m_crashingInProgress) {
+        // The screen shader uses the "pointer_position" uniform
+        // Since the screen shader could change every frame, damage tracking *needs* to be disabled
+        g_pConfigManager->addParseError("Screen shader: Screen shader uses uniform 'pointerPosition', which requires debug:damage_tracking to be switched off.\n"
+                                        "WARNING: Disabling damage tracking will *massively* increase GPU utilization!");
+    }
     m_finalScreenShader.createVao();
 }
 
@@ -1600,6 +1608,14 @@ void CHyprOpenGLImpl::renderTextureInternalWithDamage(SP<CTexture> tex, const CB
         shader->setUniformFloat2(SHADER_FULL_SIZE, m_renderData.pMonitor->m_pixelSize.x, m_renderData.pMonitor->m_pixelSize.y);
     }
 
+    if (usingFinalShader && *PDT == 0) {
+        PHLMONITORREF pMonitor = m_renderData.pMonitor;
+        Vector2D      p        = ((g_pInputManager->getMouseCoordsInternal() - pMonitor->m_position) * pMonitor->m_scale);
+        p                      = p.transform(wlTransformToHyprutils(pMonitor->m_transform), pMonitor->m_pixelSize);
+        shader->setUniformFloat2(SHADER_POINTER, p.x / pMonitor->m_pixelSize.x, p.y / pMonitor->m_pixelSize.y);
+    } else if (usingFinalShader)
+        shader->setUniformFloat2(SHADER_POINTER, 0.f, 0.f);
+
     if (CRASHING) {
         shader->setUniformFloat(SHADER_DISTORT, g_pHyprRenderer->m_crashingDistort);
         shader->setUniformFloat2(SHADER_FULL_SIZE, m_renderData.pMonitor->m_pixelSize.x, m_renderData.pMonitor->m_pixelSize.y);