From 1d85158760bd53f5641912f5067ab941236ddf0a Mon Sep 17 00:00:00 2001
From: Mikko Rasa <tdb@tdb.fi>
Date: Sun, 25 Oct 2009 16:05:43 +0000
Subject: [PATCH] Properly support arbitary sizes in History Pad the graph
 texture if NPOT textures are not supported Remove an extraneous pop_matrix
 call

---
 source/history.cpp | 27 +++++++++++++++++++--------
 source/host.cpp    |  2 --
 2 files changed, 19 insertions(+), 10 deletions(-)

diff --git a/source/history.cpp b/source/history.cpp
index adcc3ec..b3e15f2 100644
--- a/source/history.cpp
+++ b/source/history.cpp
@@ -5,6 +5,7 @@ Copyright @ 2008 Mikko Rasa, Mikkosoft Productions
 Distributed unter the GPL
 */
 
+#include <msp/gl/extension.h>
 #include <msp/gl/immediate.h>
 #include <msp/gl/matrix.h>
 #include <msp/gl/meshbuilder.h>
@@ -25,18 +26,28 @@ History::History(NetVis &n, unsigned w, unsigned h):
 	scale(1024),
 	mesh((GL::COLOR4_UBYTE, GL::TEXCOORD2, GL::VERTEX2))
 {
-	texture.storage(GL::RGBA, height, width, 0);
+	unsigned texw = height;
+	unsigned texh = width;
+	if(!GL::is_supported("ARB_texture_non_power_of_two"))
+	{
+		for(texw=1; texw<height; texw<<=1) ;
+		for(texh=1; texh<width; texh<<=1) ;
+	}
+	texture.storage(GL::RGBA, texw, texh, 0);
+	texture.image(0, GL::RGBA, GL::UNSIGNED_BYTE, 0);
 	texture.set_min_filter(GL::LINEAR);
+	float wf = static_cast<float>(height)/texw;
+	float hf = static_cast<float>(width)/texh;
 	GL::MeshBuilder bld(mesh);
 	bld.color(1.0f, 1.0f, 1.0f);
 	bld.begin(GL::QUADS);
-	bld.texcoord(0, 1);
+	bld.texcoord(0, hf);
 	bld.vertex(0, 0);
 	bld.texcoord(0, 0);
 	bld.vertex(width, 0);
-	bld.texcoord(1, 0);
+	bld.texcoord(wf, 0);
 	bld.vertex(width, height);
-	bld.texcoord(1, 1);
+	bld.texcoord(wf, hf);
 	bld.vertex(0, height);
 	bld.end();
 }
@@ -129,20 +140,20 @@ void History::create_texture()
 			up_min = min(value+1, up_min);
 			up_max = max(value, up_max);
 		}
-		unsigned *row = &data[y*100];
-		for(unsigned x=0; x<100; ++x)
+		unsigned *row = &data[y*height];
+		for(unsigned x=0; x<height; ++x)
 		{
 			if(x>=up_min && x<=up_max)
 				row[x] = 0xFF8000FF;
 			else if(x<=down)
 				row[x] = 0xFF80FF80;
-			else if(x%25==24 || y%60==0)
+			else if((x*4+4)%height==0 || y%60==0)
 				row[x] = 0x40FFFFFF;
 			else
 				row[x] = 0x00000000;
 		}
 	}
-	texture.image(0, GL::RGBA, GL::UNSIGNED_BYTE, data.data());
+	texture.sub_image(0, 0, 0, height, width, GL::RGBA, GL::UNSIGNED_BYTE, data.data());
 }
 
 
diff --git a/source/host.cpp b/source/host.cpp
index 4314d75..1e92ed7 100644
--- a/source/host.cpp
+++ b/source/host.cpp
@@ -156,6 +156,4 @@ void Host::render() const
 	imm.color(1.0f, 1.0f, 1.0f);
 	font.draw_string(short_name, imm);
 	GL::Texture::unbind();
-
-	GL::pop_matrix();
 }
-- 
2.43.0