From cbace7cb099ef44e2177b3969443f23cde53442d Mon Sep 17 00:00:00 2001
From: Maximilian Mader <max@bastelstu.be>
Date: Wed, 2 Oct 2019 23:53:18 +0200
Subject: [PATCH] [GTK3] Add function to draw grids in VRAM viewer

---
 gtk3/main.c                 | 46 +++++++++++++++++++++++++++++++++++++
 gtk3/resources/ui/window.ui | 45 ++++++++++++++++++------------------
 2 files changed, 68 insertions(+), 23 deletions(-)

diff --git a/gtk3/main.c b/gtk3/main.c
index d8b2209..8ca119d 100644
--- a/gtk3/main.c
+++ b/gtk3/main.c
@@ -716,9 +716,35 @@ static gboolean on_draw_vram_viewer_tileset(GtkWidget *widget, cairo_t *cr, gpoi
 		cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, 256)
 	);
 
+	cairo_scale(cr, 2.0, 2.0);
 	cairo_set_source_surface(cr, surface, 0, 0);
+	cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
 	cairo_paint(cr);
 
+	if (gtk_toggle_button_get_active(gtkget(GTK_TOGGLE_BUTTON, "vram_viewer_tileset_toggle_grid_button"))) {
+		cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.25);
+		cairo_set_line_width(cr, 1);
+
+		const int divisions_x = 256 / 8;
+		const int divisions_y = 192 / 8;
+
+		for (int i = 0; i < divisions_x; i++) {
+			const int j = 256 * i;
+
+			cairo_move_to(cr, j / divisions_x, 0);
+			cairo_line_to(cr, j / divisions_x, 192);
+		}
+
+		for (int i = 0; i < divisions_y; i++) {
+			const int j = 192 * i;
+
+			cairo_move_to(cr, 0, j / divisions_y);
+			cairo_line_to(cr, 256, j / divisions_y);
+		}
+
+		cairo_stroke(cr);
+	}
+
 	return FALSE;
 }
 
@@ -741,9 +767,29 @@ static gboolean on_draw_vram_viewer_tilemap(GtkWidget *widget, cairo_t *cr, gpoi
 		cairo_format_stride_for_width(CAIRO_FORMAT_RGB24, 256)
 	);
 
+	cairo_scale(cr, 2.0, 2.0);
 	cairo_set_source_surface(cr, surface, 0, 0);
+	cairo_pattern_set_filter(cairo_get_source(cr), CAIRO_FILTER_NEAREST);
 	cairo_paint(cr);
 
+	if (gtk_toggle_button_get_active(gtkget(GTK_TOGGLE_BUTTON, "vram_viewer_tilemap_toggle_grid_button"))) {
+		cairo_set_source_rgba(cr, 0.0, 0.0, 0.0, 0.25);
+		cairo_set_line_width(cr, 1);
+
+		const int divisions = 256 / 8;
+
+		for (int i = 0; i < divisions; i++) {
+			const int j = 256 * i;
+
+			cairo_move_to(cr, j / divisions, 0);
+			cairo_line_to(cr, j / divisions, 256);
+			cairo_move_to(cr, 0, j / divisions);
+			cairo_line_to(cr, 256, j / divisions);
+		}
+
+		cairo_stroke(cr);
+	}
+
 	return FALSE;
 }
 
diff --git a/gtk3/resources/ui/window.ui b/gtk3/resources/ui/window.ui
index 9a09146..dc36a65 100644
--- a/gtk3/resources/ui/window.ui
+++ b/gtk3/resources/ui/window.ui
@@ -318,7 +318,6 @@ Maximilian Mader https://github.com/max-m</property>
                 <property name="can_focus">False</property>
                 <property name="margin_top">5</property>
                 <property name="margin_bottom">10</property>
-                <items></items>
                 <signal name="changed" handler="on_boot_rom_location_changed" swapped="no"/>
               </object>
               <packing>
@@ -596,23 +595,6 @@ Maximilian Mader https://github.com/max-m</property>
                 <property name="position">3</property>
               </packing>
             </child>
-            <child>
-              <object class="GtkCheckButton" id="aspect_ratio_toggle">
-                <property name="label" translatable="yes">Keep Aspect Ratio</property>
-                <property name="visible">True</property>
-                <property name="can_focus">True</property>
-                <property name="receives_default">False</property>
-                <property name="margin_top">5</property>
-                <property name="margin_bottom">10</property>
-                <property name="draw_indicator">True</property>
-                <signal name="toggled" handler="on_keep_aspect_ratio_changed" swapped="no"/>
-              </object>
-              <packing>
-                <property name="expand">False</property>
-                <property name="fill">True</property>
-                <property name="position">4</property>
-              </packing>
-            </child>
             <child>
               <object class="GtkCheckButton" id="integer_scaling_toggle">
                 <property name="label" translatable="yes">Use Integer Scaling</property>
@@ -630,9 +612,25 @@ Maximilian Mader https://github.com/max-m</property>
                 <property name="position">4</property>
               </packing>
             </child>
+            <child>
+              <object class="GtkCheckButton" id="aspect_ratio_toggle">
+                <property name="label" translatable="yes">Keep Aspect Ratio</property>
+                <property name="visible">True</property>
+                <property name="can_focus">True</property>
+                <property name="receives_default">False</property>
+                <property name="margin_top">5</property>
+                <property name="margin_bottom">10</property>
+                <property name="draw_indicator">True</property>
+                <signal name="toggled" handler="on_keep_aspect_ratio_changed" swapped="no"/>
+              </object>
+              <packing>
+                <property name="expand">False</property>
+                <property name="fill">True</property>
+                <property name="position">4</property>
+              </packing>
+            </child>
             <child>
               <object class="GtkLabel" id="menubar_override_selector_label">
-                <property name="visible">False</property>
                 <property name="can_focus">False</property>
                 <property name="label" translatable="yes">Main Menu Override</property>
               </object>
@@ -644,7 +642,6 @@ Maximilian Mader https://github.com/max-m</property>
             </child>
             <child>
               <object class="GtkComboBoxText" id="menubar_override_selector">
-                <property name="visible">False</property>
                 <property name="can_focus">False</property>
                 <items>
                   <item id="auto" translatable="yes">Automatic</item>
@@ -1155,8 +1152,6 @@ Maximilian Mader https://github.com/max-m</property>
   <object class="GtkWindow" id="vram_viewer">
     <property name="can_focus">False</property>
     <property name="title" translatable="yes">VRAM Viewer</property>
-    <property name="default_width">512</property>
-    <property name="default_height">384</property>
     <child>
       <placeholder/>
     </child>
@@ -1259,6 +1254,8 @@ Maximilian Mader https://github.com/max-m</property>
                 </child>
                 <child>
                   <object class="GtkDrawingArea" id="vram_viewer_tileset_canvas">
+                    <property name="width_request">512</property>
+                    <property name="height_request">384</property>
                     <property name="visible">True</property>
                     <property name="app_paintable">True</property>
                     <property name="can_focus">False</property>
@@ -1341,7 +1338,7 @@ Maximilian Mader https://github.com/max-m</property>
                       </packing>
                     </child>
                     <child>
-                      <object class="GtkToggleButton" id="vram_viewer_tilemap_toggle_grid">
+                      <object class="GtkToggleButton" id="vram_viewer_tilemap_toggle_grid_button">
                         <property name="label" translatable="yes">Grid</property>
                         <property name="visible">True</property>
                         <property name="can_focus">True</property>
@@ -1399,6 +1396,8 @@ Maximilian Mader https://github.com/max-m</property>
                 </child>
                 <child>
                   <object class="GtkDrawingArea" id="vram_viewer_tilemap_canvas">
+                    <property name="width_request">512</property>
+                    <property name="height_request">512</property>
                     <property name="visible">True</property>
                     <property name="app_paintable">True</property>
                     <property name="can_focus">False</property>