From 9d9370e13c69f385eb724556f38256e8ee269c59 Mon Sep 17 00:00:00 2001
From: Giel van Schijndel <giel@wz2100.net>
Date: Thu, 4 Oct 2007 21:29:16 +0000
Subject: [PATCH]  * Make anti-aliassing of text optional (for slower systems);
 it's turned on by default though (option "textantialiassing")

git-svn-id: svn+ssh://svn.gna.org/svn/warzone/trunk@2529 4a71c877-e1ca-e34f-864e-861f7616d084
---
 lib/ivis_common/textdraw.h | 11 +++++++++++
 lib/ivis_opengl/textdraw.c | 32 +++++++++++++++++++++++++-------
 src/configuration.c        | 13 +++++++++++++
 3 files changed, 49 insertions(+), 7 deletions(-)

diff --git a/lib/ivis_common/textdraw.h b/lib/ivis_common/textdraw.h
index 99604435e..dff45f809 100644
--- a/lib/ivis_common/textdraw.h
+++ b/lib/ivis_common/textdraw.h
@@ -47,6 +47,17 @@ extern unsigned int iV_GetCharWidth(uint32_t charCode);
 extern unsigned int iV_GetTextHeight(const char* string);
 extern void iV_SetTextColour(SWORD Index);
 
+/** Enable or disable anti-aliasing of text
+ *  \param enable set this to true to enable anti-aliassing of text,
+ *                set it to false to disable it.
+ */
+extern void iV_SetTextAntialias(bool enable);
+
+/** Find out if anti-aliasing of text is enabled or disabled
+ *  \return true if anti-aliassing of text is enabled, false otherwise
+ */
+extern bool iV_TextAntialiased(void);
+
 #define ASCII_SPACE			(32)
 #define ASCII_NEWLINE		('@')
 #define ASCII_COLOURMODE	('#')
diff --git a/lib/ivis_opengl/textdraw.c b/lib/ivis_opengl/textdraw.c
index 41631d170..fcac6dddf 100644
--- a/lib/ivis_opengl/textdraw.c
+++ b/lib/ivis_opengl/textdraw.c
@@ -45,6 +45,8 @@ static GLint GLC_Context = 0;
 static GLint GLC_Font_Regular = 0;
 static GLint GLC_Font_Bold = 0;
 
+static bool anti_aliasing = true;
+
 /***************************************************************************/
 /*
  *	Source
@@ -145,6 +147,16 @@ void iV_TextShutdown()
 		glcDeleteContext(GLC_Context);
 }
 
+void iV_SetTextAntialias(bool enable)
+{
+	anti_aliasing = enable;
+}
+
+bool iV_TextAntialiased()
+{
+	return anti_aliasing;
+}
+
 void iV_SetFont(enum iV_fonts FontID)
 {
 	switch (FontID)
@@ -573,10 +585,13 @@ void iV_DrawTextRotated(const char* string, float XPos, float YPos, float rotati
 {
 	pie_SetTexturePage(-2);
 
-	// Enable Anti Aliasing
-	glEnable(GL_BLEND);
-	glBlendFunc(GL_SRC_ALPHA, GL_ONE);
-	glEnable(GL_POLYGON_SMOOTH);
+	// Enable Anti Aliasing if it's enabled
+	if (anti_aliasing)
+	{
+		glEnable(GL_BLEND);
+		glBlendFunc(GL_SRC_ALPHA, GL_ONE);
+		glEnable(GL_POLYGON_SMOOTH);
+	}
 
 	if (rotation != 0.f)
 		rotation = 360.f - rotation;
@@ -592,9 +607,12 @@ void iV_DrawTextRotated(const char* string, float XPos, float YPos, float rotati
 	glcRenderString(string);
 	glFrontFace(GL_CCW);
 
-	// Turn off anti aliasing
-	glDisable(GL_BLEND);
-	glDisable(GL_POLYGON_SMOOTH);
+	// Turn off anti aliasing (if we enabled it above)
+	if (anti_aliasing)
+	{
+		glDisable(GL_BLEND);
+		glDisable(GL_POLYGON_SMOOTH);
+	}
 
 	// Reset the current model view matrix
 	glLoadIdentity();
diff --git a/src/configuration.c b/src/configuration.c
index 8ee312482..c3424f3ce 100644
--- a/src/configuration.c
+++ b/src/configuration.c
@@ -33,6 +33,7 @@
 #include "lib/sound/track.h"		// audio
 #include "lib/sound/cdaudio.h"	// audio
 #include "lib/ivis_common/piestate.h"	// setgamma.
+#include "lib/ivis_common/textdraw.h" // text-antialiassing
 #include "warzoneconfig.h"	// renderMode
 #include "component.h"
 #include "text.h"
@@ -516,6 +517,16 @@ BOOL loadConfig(void)
 		setWarzoneKeyNumeric("radarTerrainMode", radarDrawMode);
 	}
 
+	if (getWarzoneKeyNumeric("text-antialiassing", &val))
+	{
+		iV_SetTextAntialias(val);
+	}
+	else
+	{
+		iV_SetTextAntialias(true);
+		setWarzoneKeyNumeric("text-antialiassing", true);
+	}
+
 	return closeWarzoneKey();
 }
 
@@ -622,6 +633,8 @@ BOOL saveConfig(void)
 		setWarzoneKeyString("phrase4", ingame.phrases[4]);
 	}
 
+	setWarzoneKeyNumeric("text-antialiassing", iV_TextAntialiased());
+
 	return closeWarzoneKey();
 }