Move screen size constants from video_core to core

video_core didn't even properly use them, and they were the source of
many otherwise-unnecessary dependencies from core to video_core.

src/citra/emu_window/emu_window_sdl2.cpp

@@ -12,10 +12,10 @@
 #include "common/logging/log.h"
 #include "common/scm_rev.h"
 #include "common/string_util.h"
+#include "core/3ds.h"
 #include "core/settings.h"
 #include "input_common/keyboard.h"
 #include "input_common/main.h"
-#include "video_core/video_core.h"
 
 void EmuWindow_SDL2::OnMouseMotion(s32 x, s32 y) {
     TouchMoved((unsigned)std::max(x, 0), (unsigned)std::max(y, 0));
@@ -80,12 +80,12 @@ EmuWindow_SDL2::EmuWindow_SDL2() {
 
     std::string window_title = Common::StringFromFormat("Citra %s| %s-%s ", Common::g_build_name,
                                                         Common::g_scm_branch, Common::g_scm_desc);
-    render_window = SDL_CreateWindow(
-        window_title.c_str(),
-        SDL_WINDOWPOS_UNDEFINED, // x position
-        SDL_WINDOWPOS_UNDEFINED, // y position
-        VideoCore::kScreenTopWidth, VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight,
-        SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
+    render_window =
+        SDL_CreateWindow(window_title.c_str(),
+                         SDL_WINDOWPOS_UNDEFINED, // x position
+                         SDL_WINDOWPOS_UNDEFINED, // y position
+                         Core::kScreenTopWidth, Core::kScreenTopHeight + Core::kScreenBottomHeight,
+                         SDL_WINDOW_OPENGL | SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
 
     if (render_window == nullptr) {
         LOG_CRITICAL(Frontend, "Failed to create SDL2 window! Exiting...");

src/citra_qt/bootmanager.cpp

@@ -12,12 +12,11 @@
 #include "common/microprofile.h"
 #include "common/scm_rev.h"
 #include "common/string_util.h"
+#include "core/3ds.h"
 #include "core/core.h"
 #include "core/settings.h"
 #include "input_common/keyboard.h"
 #include "input_common/main.h"
-#include "video_core/debug_utils/debug_utils.h"
-#include "video_core/video_core.h"
 
 EmuThread::EmuThread(GRenderWindow* render_window)
     : exec_step(false), running(false), stop_run(false), render_window(render_window) {}
@@ -266,8 +265,7 @@ void GRenderWindow::InitRenderTarget() {
     child = new GGLWidgetInternal(fmt, this);
     QBoxLayout* layout = new QHBoxLayout(this);
 
-    resize(VideoCore::kScreenTopWidth,
-           VideoCore::kScreenTopHeight + VideoCore::kScreenBottomHeight);
+    resize(Core::kScreenTopWidth, Core::kScreenTopHeight + Core::kScreenBottomHeight);
     layout->addWidget(child);
     layout->setMargin(0);
     setLayout(layout);

src/core/3ds.h

@@ -0,0 +1,21 @@
+// Copyright 2017 Citra Emulator Project
+// Licensed under GPLv2 or any later version
+// Refer to the license.txt file included.
+
+#pragma once
+
+namespace Core {
+
+// 3DS Video Constants
+// -------------------
+
+// NOTE: The LCDs actually rotate the image 90 degrees when displaying. Because of that the
+// framebuffers in video memory are stored in column-major order and rendered sideways, causing
+// the widths and heights of the framebuffers read by the LCD to be switched compared to the
+// heights and widths of the screens listed here.
+constexpr int kScreenTopWidth = 400;     ///< 3DS top screen width
+constexpr int kScreenTopHeight = 240;    ///< 3DS top screen height
+constexpr int kScreenBottomWidth = 320;  ///< 3DS bottom screen width
+constexpr int kScreenBottomHeight = 240; ///< 3DS bottom screen height
+
+} // namespace Core

src/core/CMakeLists.txt

@@ -179,6 +179,7 @@ set(SRCS
             )
 
 set(HEADERS
+            3ds.h
             arm/arm_interface.h
             arm/dynarmic/arm_dynarmic.h
             arm/dynarmic/arm_dynarmic_cp15.h

src/core/frontend/emu_window.cpp

@@ -5,10 +5,10 @@
 #include <algorithm>
 #include <cmath>
 #include "common/assert.h"
+#include "core/3ds.h"
 #include "core/core.h"
 #include "core/frontend/emu_window.h"
 #include "core/settings.h"
-#include "video_core/video_core.h"
 
 /**
  * Check if the given x/y coordinates are within the touchpad specified by the framebuffer layout
@@ -38,11 +38,9 @@ void EmuWindow::TouchPressed(unsigned framebuffer_x, unsigned framebuffer_y) {
     if (!IsWithinTouchscreen(framebuffer_layout, framebuffer_x, framebuffer_y))
         return;
 
-    touch_x = VideoCore::kScreenBottomWidth *
-              (framebuffer_x - framebuffer_layout.bottom_screen.left) /
+    touch_x = Core::kScreenBottomWidth * (framebuffer_x - framebuffer_layout.bottom_screen.left) /
               (framebuffer_layout.bottom_screen.right - framebuffer_layout.bottom_screen.left);
-    touch_y = VideoCore::kScreenBottomHeight *
-              (framebuffer_y - framebuffer_layout.bottom_screen.top) /
+    touch_y = Core::kScreenBottomHeight * (framebuffer_y - framebuffer_layout.bottom_screen.top) /
               (framebuffer_layout.bottom_screen.bottom - framebuffer_layout.bottom_screen.top);
 
     touch_pressed = true;

src/core/frontend/framebuffer_layout.cpp

@@ -5,16 +5,20 @@
 #include <cmath>
 
 #include "common/assert.h"
+#include "core/3ds.h"
 #include "core/frontend/framebuffer_layout.h"
 #include "core/settings.h"
-#include "video_core/video_core.h"
 
 namespace Layout {
 
 static const float TOP_SCREEN_ASPECT_RATIO =
-    static_cast<float>(VideoCore::kScreenTopHeight) / VideoCore::kScreenTopWidth;
+    static_cast<float>(Core::kScreenTopHeight) / Core::kScreenTopWidth;
 static const float BOT_SCREEN_ASPECT_RATIO =
-    static_cast<float>(VideoCore::kScreenBottomHeight) / VideoCore::kScreenBottomWidth;
+    static_cast<float>(Core::kScreenBottomHeight) / Core::kScreenBottomWidth;
+
+float FramebufferLayout::GetScalingRatio() const {
+    return static_cast<float>(top_screen.GetWidth()) / Core::kScreenTopWidth;
+}
 
 // Finds the largest size subrectangle contained in window area that is confined to the aspect ratio
 template <class T>
@@ -106,10 +110,10 @@ FramebufferLayout LargeFrameLayout(unsigned width, unsigned height, bool swapped
     float window_aspect_ratio = static_cast<float>(height) / width;
     float emulation_aspect_ratio =
         swapped
-            ? VideoCore::kScreenBottomHeight * 4 /
-                  (VideoCore::kScreenBottomWidth * 4.0f + VideoCore::kScreenTopWidth)
-            : VideoCore::kScreenTopHeight * 4 /
-                  (VideoCore::kScreenTopWidth * 4.0f + VideoCore::kScreenBottomWidth);
+            ? Core::kScreenBottomHeight * 4 /
+                  (Core::kScreenBottomWidth * 4.0f + Core::kScreenTopWidth)
+            : Core::kScreenTopHeight * 4 /
+                  (Core::kScreenTopWidth * 4.0f + Core::kScreenBottomWidth);
     float large_screen_aspect_ratio = swapped ? BOT_SCREEN_ASPECT_RATIO : TOP_SCREEN_ASPECT_RATIO;
     float small_screen_aspect_ratio = swapped ? TOP_SCREEN_ASPECT_RATIO : BOT_SCREEN_ASPECT_RATIO;
 

src/core/frontend/framebuffer_layout.h

@@ -5,7 +5,9 @@
 #pragma once
 
 #include "common/math_util.h"
+
 namespace Layout {
+
 /// Describes the layout of the window framebuffer (size and top/bottom screen positions)
 struct FramebufferLayout {
     unsigned width;
@@ -14,6 +16,12 @@ struct FramebufferLayout {
     bool bottom_screen_enabled;
     MathUtil::Rectangle<unsigned> top_screen;
     MathUtil::Rectangle<unsigned> bottom_screen;
+
+    /**
+     * Returns the ration of pixel size of the top screen, compared to the native size of the 3DS
+     * screen.
+     */
+    float GetScalingRatio() const;
 };
 
 /**
@@ -52,4 +60,5 @@ FramebufferLayout LargeFrameLayout(unsigned width, unsigned height, bool is_swap
  * @return Newly created FramebufferLayout object with default screen regions initialized
  */
 FramebufferLayout CustomFrameLayout(unsigned width, unsigned height);
-}
+
+} // namespace Layout

src/video_core/renderer_opengl/gl_rasterizer_cache.cpp

@@ -561,20 +561,16 @@ RasterizerCacheOpenGL::GetFramebufferSurfaces(
     color_params.is_tiled = depth_params.is_tiled = true;
 
     // Set the internal resolution, assume the same scaling factor for top and bottom screens
-    const Layout::FramebufferLayout& layout = VideoCore::g_emu_window->GetFramebufferLayout();
-    if (Settings::values.resolution_factor == 0.0f) {
+    float resolution_scale_factor = Settings::values.resolution_factor;
+    if (resolution_scale_factor == 0.0f) {
         // Auto - scale resolution to the window size
-        color_params.res_scale_width = depth_params.res_scale_width =
-            (float)layout.top_screen.GetWidth() / VideoCore::kScreenTopWidth;
-        color_params.res_scale_height = depth_params.res_scale_height =
-            (float)layout.top_screen.GetHeight() / VideoCore::kScreenTopHeight;
-    } else {
-        // Otherwise, scale the resolution by the specified factor
-        color_params.res_scale_width = Settings::values.resolution_factor;
-        depth_params.res_scale_width = Settings::values.resolution_factor;
-        color_params.res_scale_height = Settings::values.resolution_factor;
-        depth_params.res_scale_height = Settings::values.resolution_factor;
+        resolution_scale_factor = VideoCore::g_emu_window->GetFramebufferLayout().GetScalingRatio();
     }
+    // Scale the resolution by the specified factor
+    color_params.res_scale_width = resolution_scale_factor;
+    depth_params.res_scale_width = resolution_scale_factor;
+    color_params.res_scale_height = resolution_scale_factor;
+    depth_params.res_scale_height = resolution_scale_factor;
 
     color_params.addr = config.GetColorBufferPhysicalAddress();
     color_params.pixel_format = CachedSurface::PixelFormatFromColorFormat(config.color_format);

src/video_core/video_core.h

@@ -15,21 +15,6 @@ class RendererBase;
 
 namespace VideoCore {
 
-// 3DS Video Constants
-// -------------------
-
-// NOTE: The LCDs actually rotate the image 90 degrees when displaying. Because of that the
-// framebuffers in video memory are stored in column-major order and rendered sideways, causing
-// the widths and heights of the framebuffers read by the LCD to be switched compared to the
-// heights and widths of the screens listed here.
-static const int kScreenTopWidth = 400;     ///< 3DS top screen width
-static const int kScreenTopHeight = 240;    ///< 3DS top screen height
-static const int kScreenBottomWidth = 320;  ///< 3DS bottom screen width
-static const int kScreenBottomHeight = 240; ///< 3DS bottom screen height
-
-//  Video core renderer
-// ---------------------
-
 extern std::unique_ptr<RendererBase> g_renderer; ///< Renderer plugin
 extern EmuWindow* g_emu_window;                  ///< Emu window