101 lines
2.9 KiB
C
101 lines
2.9 KiB
C
#include "cairoimage.h"
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cCairoImage::cCairoImage(void) {
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surface = NULL;
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cr = NULL;
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}
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cCairoImage::~cCairoImage() {
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if (cr)
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cairo_destroy (cr);
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if (surface)
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cairo_surface_destroy (surface);
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}
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void cCairoImage::InitCairoImage(int width, int height) {
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this->width = width;
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this->height = height;
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surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, width, height);
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cr = cairo_create(surface);
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cairo_set_antialias(cr, CAIRO_ANTIALIAS_SUBPIXEL);
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}
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void cCairoImage::DrawTextVertical(string text, tColor color, string font, int size, int direction) {
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int imgHeight = GetTextWidth(text, font, size);
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InitCairoImage(size * 1.2, imgHeight);
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SetColor(color);
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cairo_font_weight_t fontWeight = CAIRO_FONT_WEIGHT_NORMAL;
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cairo_font_slant_t fontSlant = CAIRO_FONT_SLANT_NORMAL;
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cairo_select_font_face (cr, font.c_str(), fontSlant, fontWeight);
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cairo_set_font_size (cr, size);
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int x = size;
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int y = imgHeight;
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double rotate = 3*M_PI/2;
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if (direction == (int)eDirection::topdown) {
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rotate = M_PI/2;
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x = size*0.3;
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y = 0;
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}
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cairo_move_to (cr, x, y);
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cairo_rotate(cr, rotate);
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cairo_show_text (cr, text.c_str());
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}
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cImage *cCairoImage::GetImage(void) {
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if (!cr || !surface)
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return NULL;
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unsigned char *data = cairo_image_surface_get_data(surface);
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cImage *image = new cImage(cSize(width, height), (tColor*)data);
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return image;
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}
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/**********************************************************************************
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* Private Functions
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**********************************************************************************/
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int cCairoImage::GetTextWidth(string text, string font, int size) {
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cairo_surface_t *tmpSurface;
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cairo_t *tmpCr;
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double width = 300;
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double height = (double)size *1.3;
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cairo_font_weight_t fontWeight = CAIRO_FONT_WEIGHT_NORMAL;
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cairo_font_slant_t fontSlant = CAIRO_FONT_SLANT_NORMAL;
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tmpSurface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
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tmpCr = cairo_create (tmpSurface);
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cairo_select_font_face (tmpCr, font.c_str(), fontSlant, fontWeight);
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cairo_set_font_size (tmpCr, size);
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cairo_text_extents_t te;
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cairo_text_extents (tmpCr, text.c_str(), &te);
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int textWidth = te.width;
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cairo_destroy (tmpCr);
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cairo_surface_destroy (tmpSurface);
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return (double)textWidth * 1.1;
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}
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void cCairoImage::SetColor(tColor color) {
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if (!cr || !surface)
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return;
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tIndex tAlpha = (color & 0xFF000000) >> 24;
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tIndex tRed = (color & 0x00FF0000) >> 16;
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tIndex tGreen = (color & 0x0000FF00) >> 8;
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tIndex tBlue = (color & 0x000000FF);
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double a = (int)tAlpha / (double)255;
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double r = (int)tRed / (double)255;
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double g = (int)tGreen / (double)255;
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double b = (int)tBlue / (double)255;
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cairo_set_source_rgba(cr, r, g, b, a);
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}
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