From dffda797f940519873d07fe942017c0dafea2342 Mon Sep 17 00:00:00 2001
From: "Steinar H. Gunderson" <sgunderson@bigfoot.com>
Date: Wed, 2 Sep 2015 23:52:47 +0200
Subject: [PATCH] Draw an oversized triangle instead of a quad.

This is mostly theoretical; I've never been able to measure any
sort of real change from this. But according to popular cargo-culting,
it might have an effect since there are fewer edge pixels to shade.
---
 effect_chain.cpp | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/effect_chain.cpp b/effect_chain.cpp
index 870da81..048cc1e 100644
--- a/effect_chain.cpp
+++ b/effect_chain.cpp
@@ -1607,10 +1607,9 @@ void EffectChain::execute_phase(Phase *phase, bool last_phase, map<Phase *, GLui
 
 	// Now draw!
 	float vertices[] = {
-		0.0f, 1.0f,
+		0.0f, 2.0f,
 		0.0f, 0.0f,
-		1.0f, 1.0f,
-		1.0f, 0.0f
+		2.0f, 0.0f
 	};
 
 	GLuint vao;
@@ -1622,7 +1621,7 @@ void EffectChain::execute_phase(Phase *phase, bool last_phase, map<Phase *, GLui
 	GLuint position_vbo = fill_vertex_attribute(glsl_program_num, "position", 2, GL_FLOAT, sizeof(vertices), vertices);
 	GLuint texcoord_vbo = fill_vertex_attribute(glsl_program_num, "texcoord", 2, GL_FLOAT, sizeof(vertices), vertices);  // Same as vertices.
 
-	glDrawArrays(GL_TRIANGLE_STRIP, 0, 4);
+	glDrawArrays(GL_TRIANGLES, 0, 3);
 	check_error();
 
 	cleanup_vertex_attribute(glsl_program_num, "position", position_vbo);
-- 
2.39.2