From e4bc3c33426d6e0968d64ddb84a41966b3c37f19 Mon Sep 17 00:00:00 2001
From: ReinUsesLisp <reinuseslisp@airmail.cc>
Date: Mon, 24 Feb 2020 19:43:57 -0300
Subject: gl_rasterizer: Implement polygon modes and fill rectangles

---
 src/video_core/renderer_opengl/gl_rasterizer.cpp | 40 ++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'src/video_core/renderer_opengl/gl_rasterizer.cpp')

diff --git a/src/video_core/renderer_opengl/gl_rasterizer.cpp b/src/video_core/renderer_opengl/gl_rasterizer.cpp
index 55324e6d5..90124e114 100644
--- a/src/video_core/renderer_opengl/gl_rasterizer.cpp
+++ b/src/video_core/renderer_opengl/gl_rasterizer.cpp
@@ -487,6 +487,7 @@ void RasterizerOpenGL::Draw(bool is_indexed, bool is_instanced) {
 
     SyncViewport();
     SyncRasterizeEnable();
+    SyncPolygonModes();
     SyncColorMask();
     SyncFragmentColorClampState();
     SyncMultiSampleState();
@@ -1097,6 +1098,45 @@ void RasterizerOpenGL::SyncRasterizeEnable() {
     oglEnable(GL_RASTERIZER_DISCARD, gpu.regs.rasterize_enable == 0);
 }
 
+void RasterizerOpenGL::SyncPolygonModes() {
+    auto& gpu = system.GPU().Maxwell3D();
+    auto& flags = gpu.dirty.flags;
+    if (!flags[Dirty::PolygonModes]) {
+        return;
+    }
+    flags[Dirty::PolygonModes] = false;
+
+    if (gpu.regs.fill_rectangle) {
+        if (!GLAD_GL_NV_fill_rectangle) {
+            LOG_ERROR(Render_OpenGL, "GL_NV_fill_rectangle used and not supported");
+            glPolygonMode(GL_FRONT_AND_BACK, GL_FILL);
+            return;
+        }
+
+        flags[Dirty::PolygonModeFront] = true;
+        flags[Dirty::PolygonModeBack] = true;
+        glPolygonMode(GL_FRONT_AND_BACK, GL_FILL_RECTANGLE_NV);
+        return;
+    }
+
+    if (gpu.regs.polygon_mode_front == gpu.regs.polygon_mode_back) {
+        flags[Dirty::PolygonModeFront] = false;
+        flags[Dirty::PolygonModeBack] = false;
+        glPolygonMode(GL_FRONT_AND_BACK, MaxwellToGL::PolygonMode(gpu.regs.polygon_mode_front));
+        return;
+    }
+
+    if (flags[Dirty::PolygonModeFront]) {
+        flags[Dirty::PolygonModeFront] = false;
+        glPolygonMode(GL_FRONT, MaxwellToGL::PolygonMode(gpu.regs.polygon_mode_front));
+    }
+
+    if (flags[Dirty::PolygonModeBack]) {
+        flags[Dirty::PolygonModeBack] = false;
+        glPolygonMode(GL_BACK, MaxwellToGL::PolygonMode(gpu.regs.polygon_mode_back));
+    }
+}
+
 void RasterizerOpenGL::SyncColorMask() {
     auto& gpu = system.GPU().Maxwell3D();
     auto& flags = gpu.dirty.flags;
-- 
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