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#include <windows.h>
#include <gdiplus.h>
#include "gdiplus_container.h"
#pragma comment(lib, "gdiplus.lib")
using namespace Gdiplus;
using namespace litehtml;
gdiplus_container::gdiplus_container()
{
GdiplusStartupInput gdiplusStartupInput;
GdiplusStartup(&m_gdiplusToken, &gdiplusStartupInput, NULL);
}
gdiplus_container::~gdiplus_container()
{
clear_images();
GdiplusShutdown(m_gdiplusToken);
}
static Color gdiplus_color(web_color color)
{
return Color(color.alpha, color.red, color.green, color.blue);
}
void gdiplus_container::draw_ellipse(HDC hdc, int x, int y, int width, int height, web_color color, int line_width)
{
Graphics graphics(hdc);
graphics.SetCompositingQuality(CompositingQualityHighQuality);
graphics.SetSmoothingMode(SmoothingModeAntiAlias);
Pen pen(gdiplus_color(color));
graphics.DrawEllipse(&pen, x, y, width, height);
}
void gdiplus_container::fill_ellipse(HDC hdc, int x, int y, int width, int height, web_color color)
{
Graphics graphics(hdc);
graphics.SetCompositingQuality(CompositingQualityHighQuality);
graphics.SetSmoothingMode(SmoothingModeAntiAlias);
SolidBrush brush(gdiplus_color(color));
graphics.FillEllipse(&brush, x, y, width, height);
}
void gdiplus_container::fill_rect(HDC hdc, int x, int y, int width, int height, web_color color)
{
Graphics graphics(hdc);
SolidBrush brush(gdiplus_color(color));
graphics.FillRectangle(&brush, x, y, width, height);
}
void gdiplus_container::get_img_size(uint_ptr img, size& sz)
{
Bitmap* bmp = (Bitmap*)img;
if (bmp)
{
sz.width = bmp->GetWidth();
sz.height = bmp->GetHeight();
}
}
void gdiplus_container::free_image(uint_ptr img)
{
Bitmap* bmp = (Bitmap*)img;
delete bmp;
}
void gdiplus_container::draw_img_bg(HDC hdc, uint_ptr img, const background_paint& bg)
{
Bitmap* bgbmp = (Bitmap*)img;
Graphics graphics(hdc);
graphics.SetInterpolationMode(InterpolationModeNearestNeighbor);
graphics.SetPixelOffsetMode(PixelOffsetModeHalf);
Region reg(Rect(bg.border_box.left(), bg.border_box.top(), bg.border_box.width, bg.border_box.height));
graphics.SetClip(®);
Bitmap* scaled_img = nullptr;
if (bg.image_size.width != bgbmp->GetWidth() || bg.image_size.height != bgbmp->GetHeight())
{
scaled_img = new Bitmap(bg.image_size.width, bg.image_size.height);
Graphics gr(scaled_img);
gr.SetPixelOffsetMode(PixelOffsetModeHighQuality);
gr.DrawImage(bgbmp, 0, 0, bg.image_size.width, bg.image_size.height);
bgbmp = scaled_img;
}
switch (bg.repeat)
{
case background_repeat_no_repeat:
{
graphics.DrawImage(bgbmp, bg.position_x, bg.position_y, bgbmp->GetWidth(), bgbmp->GetHeight());
}
break;
case background_repeat_repeat_x:
{
CachedBitmap bmp(bgbmp, &graphics);
int x = bg.position_x;
while(x > bg.clip_box.left()) x -= bgbmp->GetWidth();
for(; x < bg.clip_box.right(); x += bgbmp->GetWidth())
{
graphics.DrawCachedBitmap(&bmp, x, bg.position_y);
}
}
break;
case background_repeat_repeat_y:
{
CachedBitmap bmp(bgbmp, &graphics);
int y = bg.position_y;
while(y > bg.clip_box.top()) y -= bgbmp->GetHeight();
for(; y < bg.clip_box.bottom(); y += bgbmp->GetHeight())
{
graphics.DrawCachedBitmap(&bmp, bg.position_x, y);
}
}
break;
case background_repeat_repeat:
{
CachedBitmap bmp(bgbmp, &graphics);
int x = bg.position_x;
while(x > bg.clip_box.left()) x -= bgbmp->GetWidth();
int y0 = bg.position_y;
while(y0 > bg.clip_box.top()) y0 -= bgbmp->GetHeight();
for(; x < bg.clip_box.right(); x += bgbmp->GetWidth())
{
for(int y = y0; y < bg.clip_box.bottom(); y += bgbmp->GetHeight())
{
graphics.DrawCachedBitmap(&bmp, x, y);
}
}
}
break;
}
delete scaled_img;
}
// length of dash and space for "dashed" style, in multiples of pen width
const float dash = 3;
const float space = 2;
static void draw_horz_border(Graphics& graphics, const border& border, int y, int left, int right)
{
if (border.style != border_style_double || border.width < 3)
{
if (border.width == 1) right--; // 1px-wide lines are longer by one pixel in GDI+ (the endpoint is also drawn)
Pen pen(gdiplus_color(border.color), (float)border.width);
if (border.style == border_style_dotted)
{
float dashValues[2] = { 1, 1 };
pen.SetDashPattern(dashValues, 2);
}
else if (border.style == border_style_dashed)
{
float dashValues[2] = { dash, space };
pen.SetDashPattern(dashValues, 2);
}
graphics.DrawLine(&pen,
Point(left, y + border.width / 2),
Point(right, y + border.width / 2));
}
else
{
int single_line_width = (int)round(border.width / 3.);
if (single_line_width == 1) right--;
Pen pen(gdiplus_color(border.color), (float)single_line_width);
graphics.DrawLine(&pen,
Point(left, y + single_line_width / 2),
Point(right, y + single_line_width / 2));
graphics.DrawLine(&pen,
Point(left, y + border.width - 1 - single_line_width / 2),
Point(right, y + border.width - 1 - single_line_width / 2));
}
}
static void draw_vert_border(Graphics& graphics, const border& border, int x, int top, int bottom)
{
if (border.style != border_style_double || border.width < 3)
{
if (border.width == 1) bottom--;
Pen pen(gdiplus_color(border.color), (float)border.width);
if (border.style == border_style_dotted)
{
float dashValues[2] = { 1, 1 };
pen.SetDashPattern(dashValues, 2);
}
else if (border.style == border_style_dashed)
{
float dashValues[2] = { dash, space };
pen.SetDashPattern(dashValues, 2);
}
graphics.DrawLine(&pen,
Point(x + border.width / 2, top),
Point(x + border.width / 2, bottom));
}
else
{
int single_line_width = (int)round(border.width / 3.);
if (single_line_width == 1) bottom--;
Pen pen(gdiplus_color(border.color), (float)single_line_width);
graphics.DrawLine(&pen,
Point(x + single_line_width / 2, top),
Point(x + single_line_width / 2, bottom));
graphics.DrawLine(&pen,
Point(x + border.width - 1 - single_line_width / 2, top),
Point(x + border.width - 1 - single_line_width / 2, bottom));
}
}
void gdiplus_container::draw_borders(uint_ptr hdc, const borders& borders, const position& draw_pos, bool root)
{
apply_clip((HDC) hdc);
Graphics graphics((HDC)hdc);
if (borders.left.width != 0)
{
draw_vert_border(graphics, borders.left, draw_pos.left(), draw_pos.top(), draw_pos.bottom());
}
if (borders.right.width != 0)
{
draw_vert_border(graphics, borders.right, draw_pos.right() - borders.right.width, draw_pos.top(), draw_pos.bottom());
}
if (borders.top.width != 0)
{
draw_horz_border(graphics, borders.top, draw_pos.top(), draw_pos.left(), draw_pos.right());
}
if (borders.bottom.width != 0)
{
draw_horz_border(graphics, borders.bottom, draw_pos.bottom() - borders.bottom.width, draw_pos.left(), draw_pos.right());
}
release_clip((HDC) hdc);
}
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