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System: Render save state screenshots at fixed resolution

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Fixes delays when saving state at high internal resolution.
This commit is contained in:
Connor McLaughlin
2021-04-28 02:37:52 +10:00
parent 67adc986ab
commit c2916e0719
5 changed files with 80 additions and 34 deletions
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15
src/frontend-common/fullscreen_ui.cpp
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@ -2681,8 +2681,8 @@ void DrawSaveStateSelector(bool is_loading, bool fullscreen)
constexpr float padding = 10.0f;
constexpr float button_height = 96.0f;
constexpr float image_width = 128.0f;
constexpr float image_height = 96.0f;
constexpr float max_image_width = 96.0f;
constexpr float max_image_height = 96.0f;
ImDrawList* dl = ImGui::GetWindowDrawList();
for (const SaveStateListEntry& entry : s_save_state_selector_slots)
@ -2694,8 +2694,15 @@ void DrawSaveStateSelector(bool is_loading, bool fullscreen)
continue;
ImVec2 pos(bb.Min);
const ImRect image_bb(pos, pos + LayoutScale(image_width, image_height));
pos.x += LayoutScale(image_width + padding);
// use aspect ratio of screenshot to determine height
const HostDisplayTexture* image = entry.preview_texture ? entry.preview_texture.get() : s_placeholder_texture.get();
const float image_height =
max_image_width / (static_cast<float>(image->GetWidth()) / static_cast<float>(image->GetHeight()));
const float image_margin = (max_image_height - image_height) / 2.0f;
const ImRect image_bb(ImVec2(pos.x, pos.y + LayoutScale(image_margin)),
pos + LayoutScale(max_image_width, image_margin + image_height));
pos.x += LayoutScale(max_image_width + padding);
dl->AddImage(static_cast<ImTextureID>(entry.preview_texture ? entry.preview_texture->GetHandle() :
s_placeholder_texture->GetHandle()),