65 lines
2.2 KiB
C++
65 lines
2.2 KiB
C++
#pragma once
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// Small client-wide helpers: asset paths, UI textures, color conversion.
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#include "hd2d/GL.h"
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#include "Paths.h"
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#include "hd2d/Texture.h"
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#include <imgui.h>
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#include <glm/glm.hpp>
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#include <cstdint>
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#include <string>
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#ifndef HD2D_ENGINE_ASSET_DIR
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#define HD2D_ENGINE_ASSET_DIR "../Vibe-HD-2D/assets"
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#endif
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namespace bs {
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// Game assets: `<exe dir>/assets` in a release package, else the source checkout (see Paths.h).
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inline std::string gameAsset(const std::string& rel) { return gameAssetDir() + "/" + rel; }
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// Engine shaders, fonts, textures, models: `<exe dir>/engine` in a release package, else the
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// engine checkout baked in by CMake.
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const std::string& engineAssetDir();
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inline std::string engineAsset(const std::string& rel) { return engineAssetDir() + "/" + rel; }
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constexpr float kPixelsPerUnit = 32.0f; // world texel density shared by all pixel art
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constexpr float kCreaturePixelsPerUnit = 40.0f; // creatures render a bit smaller than trainers
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inline ImU32 imColor(uint32_t rgb, int alpha = 255) {
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return IM_COL32((rgb >> 16) & 255, (rgb >> 8) & 255, rgb & 255, alpha);
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}
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inline glm::vec3 linearColor(uint32_t rgb) {
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auto f = [](uint32_t c) { float v = float(c & 255) / 255.0f; return v * v * (0.8f + 0.2f * v); };
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return {f(rgb >> 16), f(rgb >> 8), f(rgb)};
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}
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// Plain RGBA8 (not sRGB), nearest-filtered texture for ImGui images: pixel art
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// previews and icons stay crisp and show their authored colors.
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class UiTexture {
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public:
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UiTexture() = default;
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UiTexture(const UiTexture&) = delete;
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UiTexture& operator=(const UiTexture&) = delete;
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~UiTexture() { reset(); }
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// `img` uses the engine convention (row 0 = bottom); ImGui uv (0,0) is the top-left.
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void upload(const hd2d::Image& img);
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void reset();
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ImTextureID id() const { return ImTextureID(intptr_t(id_)); }
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bool valid() const { return id_ != 0; }
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glm::ivec2 size() const { return size_; }
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// ImGui uv rect of a grid cell (top-left origin, rows counted from the top).
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void cellUV(glm::ivec2 cell, int col, int row, ImVec2& uv0, ImVec2& uv1) const;
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private:
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GLuint id_ = 0;
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glm::ivec2 size_{0};
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};
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float wrapAngle(float a); // to (-pi, pi]
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} // namespace bs
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