From 63e414fc8a7ec04a0710a05ac9ce610fbb15f1e5 Mon Sep 17 00:00:00 2001
From: Ethan Yonker <dees_troy@teamw.in>
Date: Fri, 6 Feb 2015 15:44:39 -0600
Subject: Scale the GUI to fit the screen

With this patch set, if needed, we scale the images during early
boot. TTF support is needed to properly scale the font. No font
scaling is done on the old style fixed width font used in the
console.

Special thanks to _that for figuring out the scaling and blending
function calls to make this possible.

Change-Id: If2f79bef16d6db2e1298bfc3d00c9bcca2bee37a
---
 gui/gui.cpp | 64 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 61 insertions(+), 3 deletions(-)

(limited to 'gui/gui.cpp')

diff --git a/gui/gui.cpp b/gui/gui.cpp
index 8bdd4251c..35b33b10c 100644
--- a/gui/gui.cpp
+++ b/gui/gui.cpp
@@ -75,6 +75,8 @@ static TWAtomicInt gForceRender;
 const int gNoAnimation = 1;
 blanktimer blankTimer;
 int ors_read_fd = -1;
+static float scale_theme_w = 1;
+static float scale_theme_h = 1;
 
 // Needed by pages.cpp too
 int gGuiRunning = 0;
@@ -767,13 +769,26 @@ extern "C" int gui_init(void)
 {
 	gr_init();
 	std::string curtain_path = TWRES "images/curtain.jpg";
+	gr_surface source_Surface = NULL;
 
-	if (res_create_surface(curtain_path.c_str(), &gCurtain))
+	if (res_create_surface(curtain_path.c_str(), &source_Surface))
 	{
-		printf
-		("Unable to locate '%s'\nDid you set a DEVICE_RESOLUTION in your config files?\n", curtain_path.c_str());
+		printf("Unable to locate '%s'\nDid you set a DEVICE_RESOLUTION in your config files?\n", curtain_path.c_str());
 		return -1;
 	}
+	if (gr_get_width(source_Surface) != gr_fb_width() || gr_get_height(source_Surface) != gr_fb_height()) {
+		// We need to scale the curtain to fit the screen
+		float scale_w = (float)gr_fb_width() / (float)gr_get_width(source_Surface);
+		float scale_h = (float)gr_fb_height() / (float)gr_get_height(source_Surface);
+		if (res_scale_surface(source_Surface, &gCurtain, scale_w, scale_h)) {
+			LOGINFO("Failed to scale curtain\n");
+			gCurtain = source_Surface;
+		} else {
+			LOGINFO("Scaling the curtain width %fx and height %fx\n", scale_w, scale_h);
+		}
+	} else {
+		gCurtain = source_Surface;
+	}
 
 	curtainSet();
 
@@ -965,3 +980,46 @@ extern "C" int gui_console_only(void)
 
 	return 0;
 }
+
+extern "C" void set_scale_values(float w, float h)
+{
+	scale_theme_w = w;
+	scale_theme_h = h;
+}
+
+extern "C" int scale_theme_x(int initial_x)
+{
+	if (scale_theme_w != 1) {
+		return (int) ((float)initial_x * scale_theme_w);
+	}
+	return initial_x;
+}
+
+extern "C" int scale_theme_y(int initial_y)
+{
+	if (scale_theme_h != 1) {
+		return (int) ((float)initial_y * scale_theme_h);
+	}
+	return initial_y;
+}
+
+extern "C" int scale_theme_min(int initial_value)
+{
+	if (scale_theme_w != 1 || scale_theme_h != 1) {
+		if (scale_theme_w < scale_theme_h)
+			return scale_theme_x(initial_value);
+		else
+			return scale_theme_y(initial_value);
+	}
+	return initial_value;
+}
+
+extern "C" float get_scale_w()
+{
+	return scale_theme_w;
+}
+
+extern "C" float get_scale_h()
+{
+	return scale_theme_h;
+}
-- 
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