#include <freetype/freetype.h>
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#include <assert.h>
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#include <locale.h>
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#include <ctype.h>
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#include "CvxText.h"
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//====================================================================
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//====================================================================
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CvxText::CvxText(const char *freeType)
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{
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assert(freeType != NULL);
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if (FT_Init_FreeType(&m_library)) throw;
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if (FT_New_Face(m_library, freeType, 0, &m_face)) throw;
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restoreFont();
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setlocale(LC_ALL, "");
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m_backcolorEnable = true;
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}
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CvxText::~CvxText()
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{
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FT_Done_Face(m_face);
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FT_Done_FreeType(m_library);
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}
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void CvxText::getFont(int *type, CvScalar *size, bool *underline, float *diaphaneity)
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{
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if (type) *type = m_fontType;
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if (size) *size = m_fontSize;
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if (underline) *underline = m_fontUnderline;
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if (diaphaneity) *diaphaneity = m_fontDiaphaneity;
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}
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void CvxText::setFont(int *type, CvScalar *size, bool *underline, float *diaphaneity)
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{
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if (type)
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{
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if (type >= 0) m_fontType = *type;
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}
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if (size)
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{
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m_fontSize.val[0] = fabs(size->val[0]);
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m_fontSize.val[1] = fabs(size->val[1]);
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m_fontSize.val[2] = fabs(size->val[2]);
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m_fontSize.val[3] = fabs(size->val[3]);
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}
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if (underline)
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{
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m_fontUnderline = *underline;
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}
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if (diaphaneity)
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{
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m_fontDiaphaneity = *diaphaneity;
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}
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FT_Set_Pixel_Sizes(m_face, size->val[0] , size->val[0]);
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}
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void CvxText::restoreFont()
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{
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m_fontType = 0;
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m_fontSize.val[0] = 20;
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m_fontSize.val[1] = 0.5;
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m_fontSize.val[2] = 0.1;
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m_fontSize.val[3] = 0;
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m_fontUnderline = false;
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m_fontDiaphaneity = 1.0;
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m_scale = 1;
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FT_Set_Pixel_Sizes(m_face, (int)m_fontSize.val[0], (int)m_fontSize.val[0]);
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}
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int CvxText::putText(IplImage *img, const char *text, CvPoint pos)
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{
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return putText(img, text, pos, CV_RGB(255, 255, 255));
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}
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int CvxText::putText(IplImage *img, const wchar_t *text, CvPoint pos)
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{
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return putText(img, text, pos, CV_RGB(255, 255, 255));
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}
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//
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int CvxText::putText(IplImage *img, const char *text, CvPoint pos, CvScalar color)
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{
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if (img == NULL) return -1;
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if (text == NULL) return -1;
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int i;
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for (i = 0; text[i] != '\0'; ++i)
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{
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wchar_t wc = text[i];
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bool is_sascii = isascii(wc);
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if (is_sascii) mbtowc(&wc, &text[i++], 2);
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putWChar(img, wc, pos, color);
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}
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return i;
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}
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int CvxText::putText(IplImage *img, const wchar_t *text, CvPoint pos, CvScalar color)
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{
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if (img == NULL) return -1;
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if (text == NULL) return -1;
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//
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int i;
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for (i = 0; text[i] != '\0'; ++i)
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{
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putWChar(img, text[i], pos, color);
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}
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return i;
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}
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void CvxText::drawBackGround(IplImage *img, CvPoint pos, int w, int h)
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{
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cvRectangle(img, cvPoint(pos.x, pos.y + 3), cvPoint(pos.x + w, pos.y - h), m_backcolor, -1);
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}
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void CvxText::putWChar(IplImage *img, wchar_t wc, CvPoint &pos, CvScalar color)
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{
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FT_UInt glyph_index = FT_Get_Char_Index(m_face, wc);
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FT_Load_Glyph(m_face, glyph_index, FT_LOAD_DEFAULT);
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FT_Render_Glyph(m_face->glyph, FT_RENDER_MODE_MONO);
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//
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FT_GlyphSlot slot = m_face->glyph;
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double space = m_fontSize.val[0] * m_fontSize.val[1] * m_scale;
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double sep = m_fontSize.val[0] * m_fontSize.val[2] * m_scale;
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int rows = slot->bitmap.rows;
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int cols = slot->bitmap.width;
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//
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if (m_backcolorEnable)
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drawBackGround(img, pos, (int)((cols ? cols : space) + sep), m_fontSize.val[0]);
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for (int i = 0; i < rows; ++i)
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{
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for (int j = 0; j < cols; ++j)
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{
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int off = ((img->origin == 0) ? i : (rows - 1 - i))
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* slot->bitmap.pitch + j / 8;
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if (slot->bitmap.buffer[off] & (0xC0 >> (j % 8)))
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{
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int r = (img->origin == 0) ? pos.y - (rows - 1 - i) : pos.y + i;
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int c = pos.x + j;
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if (r >= 0 && r < img->height
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&& c >= 0 && c < img->width)
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{
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CvScalar scalar = cvGet2D(img, r, c);
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float p = m_fontDiaphaneity;
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for (int k = 0; k < 4; ++k)
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{
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scalar.val[k] = scalar.val[k] * (1 - p) + color.val[k] * p;
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}
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cvSet2D(img, r, c, scalar);
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}
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}
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} // end for
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} // end for
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pos.x += (int)(cols ? cols : space) + sep;
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}
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int CvxText::putText(cv::Mat img, const wchar_t *text, CvPoint pos, CvScalar color) {
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IplImage iplImage(img);
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return putText(&iplImage, text,pos,color);
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}
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int CvxText::putText(cv::Mat img, const char *text, CvPoint pos, CvScalar color) {
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IplImage iplImage(img);
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return putText(&iplImage, text,pos,color);
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}
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int CvxText::putText(cv::Mat img, const char *text, CvPoint pos) {
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return putText(img, text, pos, CV_RGB(255,255,255));
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}
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int CvxText::putText(cv::Mat img, const wchar_t *text, CvPoint pos) {
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return putText(img, text, pos, CV_RGB(255,255,255));
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}
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//
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//void CvxText::setScale(float scale) {
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// m_scale = scale;
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//}
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//
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//void CvxText::getScale(float* scale) {
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// *scale = m_scale;
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//}
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