223 lines
12 KiB
C++
223 lines
12 KiB
C++
#pragma once
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#include <EpdFontFamily.h>
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#include <HalDisplay.h>
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class FontCacheManager;
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class SdCardFont;
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#include <atomic>
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#include <cstring>
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#include <map>
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#include <string>
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#include <vector>
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#include "Bitmap.h"
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// Color representation: uint8_t mapped to 4x4 Bayer matrix dithering levels
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// 0 = transparent, 1-16 = gray levels (white to black)
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enum Color : uint8_t { Clear = 0x00, White = 0x01, LightGray = 0x05, DarkGray = 0x0A, Black = 0x10 };
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class GfxRenderer {
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public:
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enum RenderMode { BW, GRAYSCALE_LSB, GRAYSCALE_MSB };
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// Logical screen orientation from the perspective of callers
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enum Orientation {
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Portrait, // 480x800 logical coordinates (current default)
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LandscapeClockwise, // 800x480 logical coordinates, rotated 180° (swap top/bottom)
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PortraitInverted, // 480x800 logical coordinates, inverted
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LandscapeCounterClockwise // 800x480 logical coordinates, native panel orientation
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};
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private:
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static constexpr size_t BW_BUFFER_CHUNK_SIZE = 8000; // 8KB chunks to allow for non-contiguous memory
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static constexpr unsigned int REFRESH_OVERRIDE_NONE = 0;
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HalDisplay& display;
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std::atomic<int> renderMode;
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std::atomic<int> orientation;
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std::atomic<bool> fadingFix;
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// Text darkness for 2-bit grayscale glyph rendering.
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std::atomic<uint8_t> textDarkness;
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// 0 = Normal — true 4-level AA (raw=1 → light gray, raw=2 → dark gray)
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// 1 = Dark — historical default; raw=2 collapses to black
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// 2 = Extra Dark — both AA shades go black in the grayscale plane
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// 3 = Maximum — grayscale pass skipped entirely; only the hard BW
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// pass remains, so AA pixels render as solid black
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// with the FAST waveform (no gray-LUT softening)
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// Only affects AA pixels in GRAYSCALE_MSB / GRAYSCALE_LSB rendering of 2-bit fonts.
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// 1-bit fonts and the BW pass are unchanged. Default is 1 to preserve historical
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// rendering. See drawMaskFor2BitMode() in GfxRenderer.cpp for the per-level
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// pixel breakdown and a worked example glyph.
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uint8_t* frameBuffer = nullptr;
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uint16_t panelWidth = 0; // set in begin()
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uint16_t panelHeight = 0; // set in begin()
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uint16_t panelWidthBytes = 0; // set in begin()
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uint32_t frameBufferSize = 0; // set in begin()
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size_t bwBufferChunkSize = BW_BUFFER_CHUNK_SIZE;
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std::vector<uint8_t*> bwBufferChunks;
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std::map<int, EpdFontFamily> fontMap;
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// Mutable because ensureSdCardFontReady() is const (called from layout code that
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// holds a const GfxRenderer&) but triggers SD card reads and heap allocation
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// inside the SdCardFont objects. Same pragmatic compromise as fontCacheManager_.
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mutable std::map<int, SdCardFont*> sdCardFonts_;
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// Mutable because drawText() is const but needs to delegate scan-mode
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// recording to the (non-const) FontCacheManager. Same pragmatic compromise
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// as before, concentrated in a single pointer instead of four fields.
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mutable FontCacheManager* fontCacheManager_ = nullptr;
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mutable std::atomic<unsigned int> refreshOverride = REFRESH_OVERRIDE_NONE;
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void renderChar(const EpdFontFamily& fontFamily, uint32_t cp, int* x, int* y, bool pixelState,
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EpdFontFamily::Style style) const;
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void freeBwBufferChunks();
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template <Color color>
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void drawPixelDither(int x, int y) const;
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template <Color color>
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void fillArc(int maxRadius, int cx, int cy, int xDir, int yDir) const;
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// Write a patterned horizontal span directly to the physical framebuffer using byte-level operations.
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// phyY: physical row; phyX_start/phyX_end: inclusive physical column range.
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// patternByte is repeated across the span; partial edge bytes are blended with existing content.
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// Bit layout: MSB-first (bit 7 = phyX=0); 0 bits = dark pixel, 1 bits = white pixel.
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void fillPhysicalHSpanByte(int phyY, int phyX_start, int phyX_end, uint8_t patternByte) const;
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// Write a solid horizontal span directly to the physical framebuffer using byte-level operations.
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// Thin wrapper around fillPhysicalHSpanByte: state=true → 0x00 (dark), false → 0xFF (white).
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void fillPhysicalHSpan(int phyY, int phyX_start, int phyX_end, bool state) const;
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public:
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explicit GfxRenderer(HalDisplay& halDisplay)
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: display(halDisplay),
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renderMode(static_cast<int>(BW)),
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orientation(static_cast<int>(Portrait)),
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fadingFix(false),
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textDarkness(1) {}
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~GfxRenderer() { freeBwBufferChunks(); }
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static constexpr int VIEWABLE_MARGIN_TOP = 9;
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static constexpr int VIEWABLE_MARGIN_RIGHT = 3;
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static constexpr int VIEWABLE_MARGIN_BOTTOM = 3;
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static constexpr int VIEWABLE_MARGIN_LEFT = 3;
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// Setup
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void begin(); // must be called right after display.begin()
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void insertFont(int fontId, EpdFontFamily font);
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void removeFont(int fontId) { fontMap.erase(fontId); }
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void setFontCacheManager(FontCacheManager* m) { fontCacheManager_ = m; }
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FontCacheManager* getFontCacheManager() const { return fontCacheManager_; }
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const std::map<int, EpdFontFamily>& getFontMap() const { return fontMap; }
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void registerSdCardFont(int fontId, SdCardFont* font) { sdCardFonts_[fontId] = font; }
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void unregisterSdCardFont(int fontId) { sdCardFonts_.erase(fontId); }
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void clearSdCardFonts() { sdCardFonts_.clear(); }
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const std::map<int, SdCardFont*>& getSdCardFonts() const { return sdCardFonts_; }
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bool isSdCardFont(int fontId) const { return sdCardFonts_.count(fontId) > 0; }
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// Ensure SD card font glyph data is loaded for the given text. Called from layout code
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// (which holds a const GfxRenderer&) before measuring word widths. Safe to call on
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// non-SD fonts (no-op).
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void ensureSdCardFontReady(int fontId, const char* utf8Text) const;
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// Clear the cumulative SD card font metadata cache built up by repeated
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// ensureSdCardFontReady() calls. Call between sections to bound the cumulative
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// codepoint set growth across pagination. Safe to call when no SD font is active.
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void clearSdCardFontAccumulation() const;
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// Orientation control (affects logical width/height and coordinate transforms)
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void setOrientation(const Orientation o) { orientation.store(static_cast<int>(o), std::memory_order_relaxed); }
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Orientation getOrientation() const { return static_cast<Orientation>(orientation.load(std::memory_order_relaxed)); }
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// Fading fix control
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void setFadingFix(const bool enabled) { fadingFix.store(enabled, std::memory_order_relaxed); }
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// Screen ops
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int getScreenWidth() const;
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int getScreenHeight() const;
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void displayBuffer(HalDisplay::RefreshMode refreshMode = HalDisplay::FAST_REFRESH) const;
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void setNextDisplayRefreshMode(HalDisplay::RefreshMode refreshMode) const;
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// EXPERIMENTAL: Windowed update - display only a rectangular region
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// void displayWindow(int x, int y, int width, int height) const;
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void invertScreen() const;
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void clearScreen(uint8_t color = 0xFF) const;
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void getOrientedViewableTRBL(int* outTop, int* outRight, int* outBottom, int* outLeft) const;
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// Drawing
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void drawPixel(int x, int y, bool state = true) const;
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void drawLine(int x1, int y1, int x2, int y2, bool state = true) const;
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void drawLine(int x1, int y1, int x2, int y2, int lineWidth, bool state) const;
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void drawArc(int maxRadius, int cx, int cy, int xDir, int yDir, int lineWidth, bool state) const;
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void drawRect(int x, int y, int width, int height, bool state = true) const;
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void drawRect(int x, int y, int width, int height, int lineWidth, bool state) const;
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void drawRoundedRect(int x, int y, int width, int height, int lineWidth, int cornerRadius, bool state) const;
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void drawRoundedRect(int x, int y, int width, int height, int lineWidth, int cornerRadius, bool roundTopLeft,
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bool roundTopRight, bool roundBottomLeft, bool roundBottomRight, bool state) const;
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void fillRect(int x, int y, int width, int height, bool state = true) const;
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void fillRectDither(int x, int y, int width, int height, Color color) const;
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void fillRoundedRect(int x, int y, int width, int height, int cornerRadius, Color color) const;
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void fillRoundedRect(int x, int y, int width, int height, int cornerRadius, bool roundTopLeft, bool roundTopRight,
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bool roundBottomLeft, bool roundBottomRight, Color color) const;
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void drawImage(const uint8_t bitmap[], int x, int y, int width, int height) const;
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void drawIcon(const uint8_t bitmap[], int x, int y, int width, int height) const;
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void drawIconInverted(const uint8_t bitmap[], int x, int y, int width, int height) const;
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void drawBitmap(const Bitmap& bitmap, int x, int y, int maxWidth, int maxHeight, float cropX = 0,
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float cropY = 0) const;
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void drawBitmap1Bit(const Bitmap& bitmap, int x, int y, int maxWidth, int maxHeight) const;
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void fillPolygon(const int* xPoints, const int* yPoints, int numPoints, bool state = true) const;
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// Text
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int getTextWidth(int fontId, const char* text, EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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void drawCenteredText(int fontId, int y, const char* text, bool black = true,
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EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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void drawText(int fontId, int x, int y, const char* text, bool black = true,
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EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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int getSpaceWidth(int fontId, EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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/// Returns the total inter-word advance: fp4::toPixel(spaceAdvance + kern(leftCp,' ') + kern(' ',rightCp)).
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/// Using a single snap avoids the +/-1 px rounding error that arises when space advance and kern are
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/// snapped separately and then added as integers.
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int getSpaceAdvance(int fontId, uint32_t leftCp, uint32_t rightCp, EpdFontFamily::Style style) const;
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/// Returns the kerning adjustment between two adjacent codepoints.
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int getKerning(int fontId, uint32_t leftCp, uint32_t rightCp, EpdFontFamily::Style style) const;
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int getTextAdvanceX(int fontId, const char* text, EpdFontFamily::Style style) const;
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int getFontAscenderSize(int fontId) const;
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int getLineHeight(int fontId) const;
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std::string truncatedText(int fontId, const char* text, int maxWidth,
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EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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/// Word-wrap \p text into at most \p maxLines lines, each no wider than
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/// \p maxWidth pixels. Overflowing words and excess lines are UTF-8-safely
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/// truncated with an ellipsis (U+2026).
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std::vector<std::string> wrappedText(int fontId, const char* text, int maxWidth, int maxLines,
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EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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// Helper for drawing rotated text (90 degrees clockwise, for side buttons)
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void drawTextRotated90CW(int fontId, int x, int y, const char* text, bool black = true,
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EpdFontFamily::Style style = EpdFontFamily::REGULAR) const;
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int getTextHeight(int fontId) const;
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// Grayscale functions
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void setRenderMode(const RenderMode mode) {
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this->renderMode.store(static_cast<int>(mode), std::memory_order_relaxed);
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}
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RenderMode getRenderMode() const { return static_cast<RenderMode>(renderMode.load(std::memory_order_relaxed)); }
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// Text darkness control:
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// 0 = Normal, 1 = Dark, 2 = Extra Dark, 3 = Maximum.
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// Only affects anti-aliased pixels in 2-bit (grayscale) glyph rendering;
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// 1-bit fonts and the BW pass are unchanged. See drawMaskFor2BitMode() in
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// GfxRenderer.cpp for the per-level pixel breakdown and a worked example.
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void setTextDarkness(const uint8_t d) { textDarkness.store(d, std::memory_order_relaxed); }
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uint8_t getTextDarkness() const { return static_cast<uint8_t>(textDarkness.load(std::memory_order_relaxed)); }
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void copyGrayscaleLsbBuffers() const;
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void copyGrayscaleMsbBuffers() const;
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void displayGrayBuffer() const;
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bool storeBwBuffer(); // Returns true if buffer was stored successfully
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void restoreBwBuffer(); // Restore and free the stored buffer
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void cleanupGrayscaleWithFrameBuffer() const;
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// Font helpers
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const uint8_t* getGlyphBitmap(const EpdFontData* fontData, const EpdGlyph* glyph) const;
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// Low level functions
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uint8_t* getFrameBuffer() const;
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size_t getBufferSize() const;
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uint16_t getDisplayWidth() const { return panelWidth; }
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uint16_t getDisplayHeight() const { return panelHeight; }
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uint16_t getDisplayWidthBytes() const { return panelWidthBytes; }
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};
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