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Add integer scaling option (#150)

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* Add integer scaling option

* more

* more

* more
This commit is contained in:
Logan McNaughton
2025-01-14 23:23:26 +01:00
committed by GitHub
parent b3f8688ba5
commit eae81c4623
5 changed files with 75 additions and 50 deletions
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parallel-rdp/interface.cpp
+31 -21
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@@ -51,6 +51,7 @@ enum vi_registers
};
static bool fullscreen;
static bool integer_scaling;
static SDL_Window *window;
static RDP::CommandProcessor *processor;
static SDL_WSIPlatform *wsi_platform;
@@ -166,13 +167,14 @@ int sdl_event_filter(void *userdata, SDL_Event *event)
return 0;
}
void rdp_init(void *_window, GFX_INFO _gfx_info, bool _fullscreen, bool _upscale)
void rdp_init(void *_window, GFX_INFO _gfx_info, bool _upscale, bool _integer_scaling, bool _fullscreen)
{
window = (SDL_Window *)_window;
SDL_AddEventWatch(sdl_event_filter, nullptr);
gfx_info = _gfx_info;
fullscreen = _fullscreen;
integer_scaling = _integer_scaling;
bool window_vsync = 0;
wsi = new WSI;
wsi_platform = new SDL_WSIPlatform;
@@ -234,34 +236,42 @@ void rdp_close()
static void calculate_viewport(float *x, float *y, float *width, float *height)
{
bool window_widescreen = false;
int32_t display_width = (window_widescreen ? 854 : 640);
int32_t display_height = 480;
const int32_t display_width = 320;
const int32_t display_height = 240;
int w, h;
SDL_GetWindowSize(window, &w, &h);
*width = w;
*height = h;
*x = 0;
*y = 0;
int32_t hw = display_height * *width;
int32_t wh = display_width * *height;
if (integer_scaling)
{
// Integer scaling path
int scale_x = w / display_width;
int scale_y = h / display_height;
int scale = (scale_x < scale_y) ? scale_x : scale_y;
if (scale < 1)
scale = 1;
// add letterboxes or pillarboxes if the window has a different aspect ratio
// than the current display mode
if (hw > wh)
{
int32_t w_max = wh / display_height;
*x += (*width - w_max) / 2;
*width = w_max;
// Calculate scaled dimensions
int scaled_width = display_width * scale;
int scaled_height = display_height * scale;
*width = scaled_width;
*height = scaled_height;
}
else if (hw < wh)
else
{
int32_t h_max = hw / display_width;
*y += (*height - h_max) / 2;
*height = h_max;
// Regular scaling path - maintain aspect ratio
float scale_x = w / (float)display_width;
float scale_y = h / (float)display_height;
float scale = (scale_x < scale_y) ? scale_x : scale_y;
*width = display_width * scale;
*height = display_height * scale;
}
// Center the viewport
*x = (w - *width) / 2.0f;
*y = (h - *height) / 2.0f;
}
static void render_frame(Vulkan::Device &device)