diff options
author | Kevin Hartman <kevin@hart.mn> | 2014-08-29 22:23:12 -0700 |
---|---|---|
committer | Tony Wasserka <NeoBrainX@gmail.com> | 2014-11-18 13:06:05 +0100 |
commit | 221a9b023d8c9ca55c093823e9efd6d13d0a54a2 (patch) | |
tree | 57a26a0e11416b366688d00c4a2c9216fa0cde78 /src/video_core/renderer_opengl/renderer_opengl.cpp | |
parent | c8d933a14211ce6ee02659ecef758a1f303bc87f (diff) |
Viewport scaling and display density independence
The view is scaled to be as large as possible, without changing the aspect, within the bounds of the window.
On "retina" displays, or other displays where window units != pixels, the view should no longer draw incorrectly.
Diffstat (limited to 'src/video_core/renderer_opengl/renderer_opengl.cpp')
-rw-r--r-- | src/video_core/renderer_opengl/renderer_opengl.cpp | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/src/video_core/renderer_opengl/renderer_opengl.cpp b/src/video_core/renderer_opengl/renderer_opengl.cpp index 8483f79b..3757482d 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); + UpdateViewportExtent(); + glViewport(viewport_extent.x, viewport_extent.y, viewport_extent.width, viewport_extent.height); glClear(GL_COLOR_BUFFER_BIT); glUseProgram(program_id); @@ -228,6 +229,39 @@ void RendererOpenGL::SetWindow(EmuWindow* window) { render_window = window; } +void RendererOpenGL::UpdateViewportExtent() { + int width_in_pixels; + int height_in_pixels; + + render_window->GetFramebufferSize(&width_in_pixels, &height_in_pixels); + + // No update needed if framebuffer size hasn't changed + if (width_in_pixels == framebuffer_size.width && height_in_pixels == framebuffer_size.height) { + return; + } + + framebuffer_size.width = width_in_pixels; + framebuffer_size.height = height_in_pixels; + + float window_aspect_ratio = static_cast<float>(height_in_pixels) / width_in_pixels; + float emulation_aspect_ratio = static_cast<float>(resolution_height) / resolution_width; + + if (window_aspect_ratio > emulation_aspect_ratio) { + // If the window is more narrow than the emulation content, borders are applied on the + // top and bottom of the window. + viewport_extent.width = width_in_pixels; + viewport_extent.height = emulation_aspect_ratio * viewport_extent.width; + viewport_extent.x = 0; + viewport_extent.y = (height_in_pixels - viewport_extent.height) / 2; + } else { + // Otherwise, borders are applied on the left and right sides of the window. + viewport_extent.height = height_in_pixels; + viewport_extent.width = (1 / emulation_aspect_ratio) * viewport_extent.height; + viewport_extent.x = (width_in_pixels - viewport_extent.width) / 2; + viewport_extent.y = 0; + } +} + /// Initialize the renderer void RendererOpenGL::Init() { render_window->MakeCurrent(); |