StillHammer
613283d75c
Phase 7 - Text Rendering: - Add BitmapFont with embedded 8x8 CP437 font (ASCII 32-126) - Add TextPass for instanced glyph rendering - Fix SceneCollector::parseText() to copy strings to FrameAllocator Phase 8A - Multi-texture Support: - Add numeric texture ID system in ResourceCache - SpritePass sorts by textureId and batches per texture - Flush batch on texture change for efficient rendering Phase 8B - Tilemap Rendering: - Add TilemapPass for grid-based tile rendering - Support tileData as comma-separated string - Tiles rendered as instanced quads Window Resize: - Handle window resize via process() input - Call bgfx::reset() on size change 🤖 Generated with [Claude Code](https://claude.com/claude-code) Co-Authored-By: Claude <noreply@anthropic.com>
102 lines
2.8 KiB
C++
102 lines
2.8 KiB
C++
#pragma once
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#include "../RHI/RHITypes.h"
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#include <cstdint>
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#include <string>
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#include <unordered_map>
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namespace grove {
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namespace rhi { class IRHIDevice; }
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// ============================================================================
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// Glyph Info - Metrics for a single character
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// ============================================================================
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struct GlyphInfo {
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float u0, v0, u1, v1; // UV coordinates in atlas
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float width, height; // Glyph size in pixels
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float offsetX, offsetY; // Offset from cursor position
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float advance; // Cursor advance after this glyph
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};
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// ============================================================================
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// BitmapFont - Simple bitmap font for text rendering
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// ============================================================================
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class BitmapFont {
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public:
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BitmapFont() = default;
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~BitmapFont() = default;
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// Non-copyable
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BitmapFont(const BitmapFont&) = delete;
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BitmapFont& operator=(const BitmapFont&) = delete;
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/**
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* @brief Initialize with embedded 8x8 monospace font
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* @param device RHI device for texture creation
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* @return true on success
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*/
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bool initDefault(rhi::IRHIDevice& device);
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/**
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* @brief Load font from BMFont format (.fnt + .png)
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* @param device RHI device for texture creation
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* @param fntPath Path to .fnt file
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* @param pngPath Path to .png atlas
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* @return true on success
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*/
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bool loadBMFont(rhi::IRHIDevice& device, const std::string& fntPath, const std::string& pngPath);
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/**
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* @brief Cleanup GPU resources
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*/
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void shutdown(rhi::IRHIDevice& device);
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/**
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* @brief Get glyph info for a character
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* @param codepoint Unicode codepoint (ASCII for now)
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* @return Glyph info, or default space if not found
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*/
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const GlyphInfo& getGlyph(uint32_t codepoint) const;
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/**
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* @brief Get font atlas texture
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*/
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rhi::TextureHandle getTexture() const { return m_texture; }
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/**
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* @brief Get line height (for multi-line text)
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*/
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float getLineHeight() const { return m_lineHeight; }
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/**
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* @brief Get base font size (pixels)
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*/
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float getBaseSize() const { return m_baseSize; }
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/**
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* @brief Calculate text width in pixels
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*/
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float measureWidth(const char* text) const;
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/**
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* @brief Check if font is loaded
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*/
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bool isValid() const { return m_texture.isValid(); }
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private:
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void generateDefaultGlyphs();
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rhi::TextureHandle m_texture;
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std::unordered_map<uint32_t, GlyphInfo> m_glyphs;
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GlyphInfo m_defaultGlyph;
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float m_lineHeight = 8.0f;
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float m_baseSize = 8.0f;
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uint16_t m_atlasWidth = 128;
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uint16_t m_atlasHeight = 64;
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};
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} // namespace grove
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