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-rw-r--r--src/video_core/renderer_opengl/renderer_opengl.cpp31
-rw-r--r--src/video_core/renderer_opengl/renderer_opengl.h11
2 files changed, 38 insertions, 4 deletions
diff --git a/src/video_core/renderer_opengl/renderer_opengl.cpp b/src/video_core/renderer_opengl/renderer_opengl.cpp
index 8483f79be..729e8e73d 100644
--- a/src/video_core/renderer_opengl/renderer_opengl.cpp
+++ b/src/video_core/renderer_opengl/renderer_opengl.cpp
@@ -191,7 +191,8 @@ void RendererOpenGL::DrawSingleScreenRotated(const TextureInfo& texture, float x
* Draws the emulated screens to the emulator window.
*/
void RendererOpenGL::DrawScreens() {
- glViewport(0, 0, resolution_width, resolution_height);
+ auto viewport_extent = GetViewportExtent();
+ glViewport(viewport_extent.left, viewport_extent.top, viewport_extent.GetWidth(), viewport_extent.GetHeight()); // TODO: Or bottom?
glClear(GL_COLOR_BUFFER_BIT);
glUseProgram(program_id);
@@ -228,6 +229,34 @@ void RendererOpenGL::SetWindow(EmuWindow* window) {
render_window = window;
}
+MathUtil::Rectangle<unsigned> RendererOpenGL::GetViewportExtent() {
+ unsigned framebuffer_width;
+ unsigned framebuffer_height;
+ std::tie(framebuffer_width, framebuffer_height) = render_window->GetFramebufferSize();
+
+ float window_aspect_ratio = static_cast<float>(framebuffer_height) / framebuffer_width;
+ float emulation_aspect_ratio = static_cast<float>(resolution_height) / resolution_width;
+
+ MathUtil::Rectangle<unsigned> viewport_extent;
+ if (window_aspect_ratio > emulation_aspect_ratio) {
+ // Window is narrower than the emulation content => apply borders to the top and bottom
+ unsigned viewport_height = emulation_aspect_ratio * framebuffer_width;
+ viewport_extent.left = 0;
+ viewport_extent.top = (framebuffer_height - viewport_height) / 2;
+ viewport_extent.right = viewport_extent.left + framebuffer_width;
+ viewport_extent.bottom = viewport_extent.top + viewport_height;
+ } else {
+ // Otherwise, apply borders to the left and right sides of the window.
+ unsigned viewport_width = framebuffer_height / emulation_aspect_ratio;
+ viewport_extent.left = (framebuffer_width - viewport_width) / 2;
+ viewport_extent.top = 0;
+ viewport_extent.right = viewport_extent.left + viewport_width;
+ viewport_extent.bottom = viewport_extent.top + framebuffer_height;
+ }
+
+ return viewport_extent;
+}
+
/// Initialize the renderer
void RendererOpenGL::Init() {
render_window->MakeCurrent();
diff --git a/src/video_core/renderer_opengl/renderer_opengl.h b/src/video_core/renderer_opengl/renderer_opengl.h
index eed201a95..7fdcec731 100644
--- a/src/video_core/renderer_opengl/renderer_opengl.h
+++ b/src/video_core/renderer_opengl/renderer_opengl.h
@@ -4,13 +4,15 @@
#pragma once
+#include <array>
+
#include "generated/gl_3_2_core.h"
-#include "common/common.h"
+#include "common/math_util.h"
+
#include "core/hw/gpu.h"
-#include "video_core/renderer_base.h"
-#include <array>
+#include "video_core/renderer_base.h"
class EmuWindow;
@@ -52,6 +54,9 @@ private:
static void LoadFBToActiveGLTexture(const GPU::Regs::FramebufferConfig& framebuffer,
const TextureInfo& texture);
+ /// Computes the viewport rectangle
+ MathUtil::Rectangle<unsigned> GetViewportExtent();
+
EmuWindow* render_window; ///< Handle to render window
u32 last_mode; ///< Last render mode