1 files changed, 71 insertions, 0 deletions
diff --git a/src/engine/glare.cpp b/src/engine/glare.cpp
new file mode 100644
index 0000000..dc639ad
--- /dev/null
+++ b/src/engine/glare.cpp
@@ -0,0 +1,71 @@
+#include "engine.h"
+#include "rendertarget.h"
+
+static struct glaretexture : rendertarget
+{
+    bool dorender()
+    {
+        extern void drawglare();
+        drawglare();
+        return true;
+    }
+} glaretex;
+
+void cleanupglare()
+{
+    glaretex.cleanup(true);
+}
+
+VARFP(glaresize, 6, 8, 10, cleanupglare());
+VARP(glare, 0, 0, 1);
+VARP(blurglare, 0, 4, 7);
+VARP(blurglareaspect, 0, 1, 1);
+VARP(blurglaresigma, 1, 50, 200);
+
+VAR(debugglare, 0, 0, 1);
+
+void viewglaretex()
+{
+    if(!glare) return;
+    glaretex.debug();
+}
+
+bool glaring = false;
+
+void drawglaretex()
+{
+    if(!glare) return;
+
+    int w = 1<<glaresize, h = 1<<glaresize, blury = blurglare;
+    if(blurglare && blurglareaspect)
+    {
+        while(h > (1<<5) && (screenw*h)/w >= (screenh*4)/3) h /= 2;
+        blury = ((1 + 4*blurglare)*(screenw*h)/w + screenh*2)/(screenh*4);
+        blury = clamp(blury, 1, MAXBLURRADIUS);
+    }
+
+    glaretex.render(w, h, blurglare, blurglaresigma/100.0f, blury);
+}
+
+FVAR(glaremod, 0.5f, 0.75f, 1);
+FVARP(glarescale, 0, 1, 8);
+
+void addglare()
+{
+    if(!glare) return;
+
+    glEnable(GL_BLEND);
+    glBlendFunc(GL_ONE, GL_ONE);
+
+    SETSHADER(screenrect);
+
+    glBindTexture(GL_TEXTURE_2D, glaretex.rendertex);
+
+    float g = glarescale*glaremod;
+    gle::colorf(g, g, g);
+
+    screenquad(1, 1);
+
+    glDisable(GL_BLEND);
+}
+