From dcd1e440e009b7861f09e2b718ea489bdcea34b5 Mon Sep 17 00:00:00 2001
From: James Christopher Adduono <jc@adduono.com>
Date: Sun, 6 Nov 2016 13:17:34 -0500
Subject: Support theme width and height offsets

Current use condition is LG V20, where the secondary screen is
actually just a corner chunk of the main screen.
In this case, we need to shift the UI down some pixels in order
to see it all, but just using Y offsets resulted in losing
the rest of the GUI below.

Example in BoardConfig.mk:
  # Shift TWRP off the secondary screen
  TW_Y_OFFSET := 160
  TW_H_OFFSET := -160

Change-Id: I5a06638ba0d05e5b9fd8a6245c630d6ea3394f78
---
 gui/Android.mk  |  6 ++++++
 gui/objects.hpp |  6 ++++++
 gui/pages.cpp   | 27 ++++++++++++++++++++++-----
 3 files changed, 34 insertions(+), 5 deletions(-)

diff --git a/gui/Android.mk b/gui/Android.mk
index b514e5be1..dab35a4ce 100644
--- a/gui/Android.mk
+++ b/gui/Android.mk
@@ -67,6 +67,12 @@ endif
 ifneq ($(TW_Y_OFFSET),)
     LOCAL_CFLAGS += -DTW_Y_OFFSET=$(TW_Y_OFFSET)
 endif
+ifneq ($(TW_W_OFFSET),)
+    LOCAL_CFLAGS += -DTW_W_OFFSET=$(TW_W_OFFSET)
+endif
+ifneq ($(TW_H_OFFSET),)
+    LOCAL_CFLAGS += -DTW_H_OFFSET=$(TW_H_OFFSET)
+endif
 ifeq ($(TW_ROUND_SCREEN), true)
     LOCAL_CFLAGS += -DTW_ROUND_SCREEN
 endif
diff --git a/gui/objects.hpp b/gui/objects.hpp
index 2a95022d3..750627729 100644
--- a/gui/objects.hpp
+++ b/gui/objects.hpp
@@ -42,6 +42,12 @@ using namespace rapidxml;
 #ifndef TW_Y_OFFSET
 #define TW_Y_OFFSET 0
 #endif
+#ifndef TW_W_OFFSET
+#define TW_W_OFFSET 0
+#endif
+#ifndef TW_H_OFFSET
+#define TW_H_OFFSET 0
+#endif
 
 class RenderObject
 {
diff --git a/gui/pages.cpp b/gui/pages.cpp
index b6b72966a..d7cb92d63 100644
--- a/gui/pages.cpp
+++ b/gui/pages.cpp
@@ -71,6 +71,8 @@ std::vector<language_struct> Language_List;
 
 int tw_x_offset = 0;
 int tw_y_offset = 0;
+int tw_w_offset = 0;
+int tw_h_offset = 0;
 
 // Helper routine to convert a string to a color declaration
 int ConvertStrToColor(std::string str, COLOR* color)
@@ -895,16 +897,17 @@ int PageSet::LoadDetails(LoadingContext& ctx, xml_node<>* root)
 				}
 #endif
 				if (width != 0 && height != 0) {
-					float scale_w = ((float)gr_fb_width() - ((float)offx * 2.0)) / (float)width;
-					float scale_h = ((float)gr_fb_height() - ((float)offy * 2.0)) / (float)height;
+					float scale_w = (((float)gr_fb_width() + (float)tw_w_offset) - ((float)offx * 2.0)) / (float)width;
+					float scale_h = (((float)gr_fb_height() + (float)tw_h_offset) - ((float)offy * 2.0)) / (float)height;
 #ifdef TW_ROUND_SCREEN
-					float scale_off_w = (float)gr_fb_width() / (float)width;
-					float scale_off_h = (float)gr_fb_height() / (float)height;
+					float scale_off_w = ((float)gr_fb_width() + (float)tw_w_offset) / (float)width;
+					float scale_off_h = ((float)gr_fb_height() + (float)tw_h_offset) / (float)height;
 					tw_x_offset = offx * scale_off_w;
 					tw_y_offset = offy * scale_off_h;
 #endif
 					if (scale_w != 1 || scale_h != 1) {
-						LOGINFO("Scaling theme width %fx and height %fx, offsets x: %i y: %i\n", scale_w, scale_h, tw_x_offset, tw_y_offset);
+						LOGINFO("Scaling theme width %fx and height %fx, offsets x: %i y: %i w: %i h: %i\n",
+							scale_w, scale_h, tw_x_offset, tw_y_offset, tw_w_offset, tw_h_offset);
 						set_scale_values(scale_w, scale_h);
 					}
 				}
@@ -1018,6 +1021,16 @@ int PageSet::LoadVariables(xml_node<>* vars)
 				child = child->next_sibling("variable");
 				continue;
 			}
+			if (strcmp(name->value(), "tw_w_offset") == 0) {
+				tw_w_offset = atoi(value->value());
+				child = child->next_sibling("variable");
+				continue;
+			}
+			if (strcmp(name->value(), "tw_h_offset") == 0) {
+				tw_h_offset = atoi(value->value());
+				child = child->next_sibling("variable");
+				continue;
+			}
 			p = persist ? atoi(persist->value()) : 0;
 			string temp = value->value();
 			string valstr = gui_parse_text(temp);
@@ -1340,6 +1353,8 @@ int PageManager::LoadPackage(std::string name, std::string package, std::string
 		LOGINFO("Load XML directly\n");
 		tw_x_offset = TW_X_OFFSET;
 		tw_y_offset = TW_Y_OFFSET;
+		tw_w_offset = TW_W_OFFSET;
+		tw_h_offset = TW_H_OFFSET;
 		if (name != "splash") {
 			LoadLanguageList(NULL);
 			languageFile = LoadFileToBuffer(TWRES "languages/en.xml", NULL);
@@ -1351,6 +1366,8 @@ int PageManager::LoadPackage(std::string name, std::string package, std::string
 		LOGINFO("Loading zip theme\n");
 		tw_x_offset = 0;
 		tw_y_offset = 0;
+		tw_w_offset = 0;
+		tw_h_offset = 0;
 		if (!TWFunc::Path_Exists(package))
 			return -1;
 		if (sysMapFile(package.c_str(), &map) != 0) {
-- 
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