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https://github.com/Kelsidavis/WoWee.git
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cb5ab1fe9e
A backdrop's insets and edge size are authored in interface units like everything else, but were used directly against a rect already converted to pixels. On a 1528-tall display that is a border half its proper thickness and insets half as deep, and it would be too thick on a short one; a tiled background repeated at a rate that changed with the window. Adds layout tests for what the display actually changes: only the height sets the scale, the width follows from it, and a frame keeps its authored size in units on a 4:3, an ultrawide and a portrait monitor alike.
71 lines
2.7 KiB
C++
71 lines
2.7 KiB
C++
#pragma once
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// Draws a WidgetTree.
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//
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// Kept apart from the tree itself so the layout rules stay testable without a
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// Vulkan device. This half is the part that needs one.
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//
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// Textures come from the game's own Interface\ art through the existing asset
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// path — read the BLP, upload it, hand ImGui the descriptor set — which is the
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// same route the action bar already takes for its backpack button. Nothing new
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// is shipped; it is the player's own install being drawn.
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#include <cstdint>
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#include <string>
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#include <unordered_map>
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#include <vulkan/vulkan.h>
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struct ImDrawList; // global, as ImGui declares it
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namespace wowee {
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namespace pipeline { class AssetManager; }
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namespace rendering { class VkContext; }
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namespace ui {
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class WidgetTree;
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struct Widget;
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class WidgetRenderer {
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public:
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void initialize(pipeline::AssetManager* assets, rendering::VkContext* vkCtx);
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/// Lay the tree out for this screen and draw it. Safe to call with no
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/// device or assets — it simply does nothing, which is what the headless
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/// tests want.
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void render(WidgetTree& tree, float screenW, float screenH);
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/// Number of distinct textures resident. Cheap diagnostic; the cache never
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/// evicts, because Interface\ art is small, bounded and reused constantly.
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size_t textureCount() const { return textures_.size(); }
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private:
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/// Descriptor set for an Interface\ path, loading it on first use. Returns
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/// VK_NULL_HANDLE for anything missing, and remembers the failure so a
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/// mistyped path is not re-read every frame.
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VkDescriptorSet texture(const std::string& path, bool add = false);
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/// Already-uploaded texture for a path, without triggering an upload.
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VkDescriptorSet resident(const std::string& path, bool add = false) const;
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/// scale is pixels per interface unit. The rect arrives in pixels, but a
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/// backdrop's insets and edge size are authored in units like everything
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/// else, so they have to make the same trip or a border comes out the
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/// wrong thickness on any display that is not 768 pixels tall.
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void drawBackdrop(ImDrawList* dl, const Widget& w, float scale,
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float x0, float y0, float x1, float y1);
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void drawStatusBar(ImDrawList* dl, const Widget& w,
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float x0, float y0, float x1, float y1);
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void drawSlider(ImDrawList* dl, const Widget& w,
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float x0, float y0, float x1, float y1);
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void drawCooldown(ImDrawList* dl, const Widget& w,
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float x0, float y0, float x1, float y1);
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pipeline::AssetManager* assets_ = nullptr;
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rendering::VkContext* vkCtx_ = nullptr;
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std::unordered_map<std::string, VkDescriptorSet> textures_;
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};
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} // namespace ui
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} // namespace wowee
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