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149 lines
3.0 KiB
C++
149 lines
3.0 KiB
C++
//
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// Created by Matthew on 2024/1/4.
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//
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#ifndef MICROPHOTO_TEXTPAINT_H
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#define MICROPHOTO_TEXTPAINT_H
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#include <ft2build.h>
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#include FT_FREETYPE_H
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#include FT_STROKER_H
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#include <vector>
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#include <fstream>
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#include <iostream>
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#ifdef _MSC_VER
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#define MIN __min
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#define MAX __max
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#else
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#define MIN std::min
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#define MAX std::max
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#endif
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namespace puttext
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{
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// Define some fixed size types.
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typedef unsigned char uint8;
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typedef unsigned short uint16;
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typedef unsigned int uint32;
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// Try to figure out what endian this machine is using. Note that the test
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// below might fail for cross compilation; additionally, multi-byte
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// characters are implementation-defined in C preprocessors.
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#if (('1234' >> 24) == '1')
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#elif (('4321' >> 24) == '1')
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#define BIG_ENDIAN
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#else
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#error "Couldn't determine the endianness!"
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#endif
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union Pixel32
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{
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Pixel32()
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: integer(0) { }
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Pixel32(uint8 bi, uint8 gi, uint8 ri, uint8 ai = 255)
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{
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b = bi;
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g = gi;
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r = ri;
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a = ai;
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}
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uint32 integer;
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struct
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{
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#ifdef BIG_ENDIAN
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uint8 a, r, g, b;
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#else // BIG_ENDIAN
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uint8 b, g, r, a;
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#endif // BIG_ENDIAN
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};
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};
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struct Vec2
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{
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Vec2() { }
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Vec2(float a, float b)
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: x(a), y(b) { }
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float x, y;
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};
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struct Rect
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{
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Rect() { }
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Rect(float left, float top, float right, float bottom)
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: xmin(left), xmax(right), ymin(top), ymax(bottom) { }
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void Include(const Vec2 &r)
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{
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xmin = MIN(xmin, r.x);
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ymin = MIN(ymin, r.y);
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xmax = MAX(xmax, r.x);
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ymax = MAX(ymax, r.y);
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}
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float Width() const { return xmax - xmin + 1; }
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float Height() const { return ymax - ymin + 1; }
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float xmin, xmax, ymin, ymax;
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};
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// A horizontal pixel span generated by the FreeType renderer.
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struct Span
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{
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Span() { }
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Span(int _x, int _y, int _width, int _coverage)
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: x(_x), y(_y), width(_width), coverage(_coverage) { }
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int x, y, width, coverage;
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};
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typedef std::vector<Span> Spans;
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// Each time the renderer calls us back we just push another span entry on
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// our list.
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void RasterCallback(const int y, const int count, const FT_Span * const spans, void * const user);
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// Set up the raster parameters and render the outline.
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void RenderSpans(FT_Library &library, FT_Outline * const outline, Spans *spans);
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// Render the specified character as a colored glyph with a colored outline
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// and dump it to a TGA.
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class TextPaint
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{
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public:
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TextPaint();
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~TextPaint();
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bool LoadFont(const char* fontFilePath);
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bool DrawText(Pixel32 *pxl, const wchar_t* str, int size, const Pixel32 &fontCol, const Pixel32& outlineCol, float outlineWidth);
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private:
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FT_Library library;
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FT_Face face;
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};
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} // namespace puttext
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#endif //MICROPHOTO_TEXTPAINT_H
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