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experimental highdpi support in linux.

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This commit is contained in:
Syoyo Fujita
2023-10-13 22:54:15 +09:00
parent bd9ab32f80
commit f0fe6f3f86
1 changed files with 41 additions and 4 deletions
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45
examples/sdlviewer/main.cc
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@@ -765,8 +765,6 @@ int main(int argc, char** argv) {
std::cout << "Loading file " << filename << "\n";
// tinyusdz::HighLevelScene scene;
bool init_with_empty = false;
if (!LoadModel(filename, &g_gui_ctx.stage)) {
@@ -783,6 +781,22 @@ int main(int argc, char** argv) {
//}
}
// Assume single monitor
SDL_DisplayMode DM;
SDL_GetCurrentDisplayMode(0, &DM);
std::cout << "Current monitor: " << DM.w << " x " << DM.h << "\n";
int default_win_x = 1600;
int default_win_y = 800;
if (DM.w > 2560) {
default_win_x = 2560;
}
if (DM.h > 1600) {
default_win_y = 1600;
}
#if defined(__APPLE__)
// For some reason, HIGHDPI does not work well on Retina Display for SDLRenderer backend.
// Disable it for a while.
@@ -791,9 +805,10 @@ int main(int argc, char** argv) {
SDL_WindowFlags window_flags = static_cast<SDL_WindowFlags>(SDL_WINDOW_RESIZABLE | SDL_WINDOW_ALLOW_HIGHDPI);
#endif
std::cout << "default window size: " << default_win_x << " x " << default_win_y << "\n";
SDL_Window* window = SDL_CreateWindow(
"Simple USDZ viewer", SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
1600, 800, window_flags);
default_win_x, default_win_y, window_flags);
if (!window) {
std::cerr << "Failed to create SDL2 window. If you are running on Linux, "
"probably X11 Display is not setup correctly. Check your "
@@ -840,12 +855,34 @@ int main(int argc, char** argv) {
ImNodes::CreateContext();
{
float ddpi, hdpi, vdpi;
if (SDL_GetDisplayDPI(0, &ddpi, &hdpi, &vdpi) != 0) {
fprintf(stderr, "Failed to obtain DPI information for display 0: %s\n", SDL_GetError());
exit(1);
}
std::cout << "ddpi " << ddpi << ", hdpi " << hdpi << ", vdpi " << vdpi << "\n";
float dpi_scaling = ddpi / 72.0f;
ImGuiIO& io = ImGui::GetIO();
if (dpi_scaling >= 144.0f) {
// https://github.com/ocornut/imgui/issues/1786
// nx DisplayFrameBufferScale + nx font_size + FontGlobalScale 0.5 may give nicer visual on High DPI monitor
io.FontGlobalScale = 0.5f;
}
io.DisplayFramebufferScale = {dpi_scaling , dpi_scaling}; // HACK
ImFontConfig roboto_config;
strcpy(roboto_config.Name, "Roboto");
float font_size = 18.0f;
float font_size = 18.0 * dpi_scaling;
//ImFontConfig font_config;
//font_config.SizePixels = 18.0f * xscale;
//io.Fonts->AddFontDefault(&font_config);
io.Fonts->AddFontFromMemoryCompressedTTF(roboto_mono_compressed_data,
roboto_mono_compressed_size,
font_size, &roboto_config);