From 66bcacf7cd9cbc4bcecceeaf2b7c736cc1da85ed Mon Sep 17 00:00:00 2001
From: dec05eba <dec05eba@protonmail.com>
Date: Sun, 13 Sep 2020 02:58:13 +0200
Subject: Use glScissor to cut off area outside body

---
 src/Body.cpp | 8 ++++++++
 1 file changed, 8 insertions(+)

(limited to 'src/Body.cpp')

diff --git a/src/Body.cpp b/src/Body.cpp
index a9dc18f..0297072 100644
--- a/src/Body.cpp
+++ b/src/Body.cpp
@@ -3,6 +3,7 @@
 #include "../plugins/Plugin.hpp"
 #include <SFML/Graphics/RectangleShape.hpp>
 #include <SFML/Graphics/Sprite.hpp>
+#include <SFML/OpenGL.hpp>
 #include <assert.h>
 #include <cmath>
 
@@ -136,6 +137,8 @@ namespace QuickMedia {
     // TODO: Load thumbnails with more than one thread.
     // TODO: Show chapters (rows) that have been read differently to make it easier to see what hasn't been read yet.
     void Body::draw(sf::RenderWindow &window, sf::Vector2f pos, sf::Vector2f size, const Json::Value &content_progress) {
+        sf::Vector2f scissor_pos = pos;
+
         const float image_max_height = 100.0f;
         const float spacing_y = 15.0f;
         const float padding_x = 10.0f;
@@ -209,6 +212,10 @@ namespace QuickMedia {
             }
         }
 
+        sf::Vector2u window_size = window.getSize();
+        glEnable(GL_SCISSOR_TEST);
+        glScissor(scissor_pos.x, (int)window_size.y - (int)scissor_pos.y - (int)size.y, size.x, size.y);
+
         for(int i = first_visible_item + 1; i < num_items; ++i) {
             const auto &item = items[i];
 
@@ -331,6 +338,7 @@ namespace QuickMedia {
 
             pos.y += item_height + spacing_y;
         }
+        glDisable(GL_SCISSOR_TEST);
 
         for(auto it = item_thumbnail_textures.begin(); it != item_thumbnail_textures.end();) {
             if(!it->second.referenced) 
-- 
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