Ejemplos de create_surface_buffer en C++ (Cpp)

Ejemplo n.º 1

Archivo: text.cpp Proyecto: PoignardAzur/wesnoth

void ttext::rerender(const bool force) const
{
	if(surface_dirty_ || force) {
		assert(layout_);

		recalculate(force);
		surface_dirty_ = false;

		int width = rect_.x + rect_.width;
		int height = rect_.y + rect_.height;
		if (maximum_width_  > 0 && width  > maximum_width_ ) width  = maximum_width_;
		if (maximum_height_ > 0 && height > maximum_height_) height = maximum_height_;
		const unsigned stride = width * 4;
		create_surface_buffer(stride * height);

		cairo_surface_t *cairo_surface =
			cairo_image_surface_create_for_data(surface_buffer_,
				CAIRO_FORMAT_ARGB32, width, height, stride);
		cairo_t *cr = cairo_create(cairo_surface);

		/* set color (used for foreground). */
		cairo_set_source_rgba(cr,
			 (foreground_color_ >> 24)         / 256.0,
			((foreground_color_ >> 16) & 0xFF) / 256.0,
			((foreground_color_ >> 8)  & 0xFF) / 256.0,
			(foreground_color_         & 0xFF) / 256.0);

		pango_cairo_show_layout(cr, layout_);

#ifndef _WIN32

		// The cairo surface is in CAIRO_FORMAT_ARGB32 which uses
		// pre-multiplied alpha. SDL doesn't use that so the pixels need to be
		// decoded again.
		for (int y = 0; y < height; ++y) {
			for (int x = 0; x < width; ++x)
			{
				unsigned char *pixel = &surface_buffer_[(y * width + x) * 4];
				decode_pixel(pixel);
			}
		}
#else
		// The solution code above doesn't seem to work properly on windows so
		// use the old trick of drawing the same text a few times.
		pango_cairo_show_layout(cr, layout_);
		pango_cairo_show_layout(cr, layout_);
		pango_cairo_show_layout(cr, layout_);
#endif
		surface_.assign(SDL_CreateRGBSurfaceFrom(
			surface_buffer_, width, height, 32, stride,
			0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000));
#ifdef SDL_GPU
		texture_ = sdl::timage(surface_);
#endif
		cairo_destroy(cr);
		cairo_surface_destroy(cairo_surface);
	}

Ejemplo n.º 2

Archivo: text.cpp Proyecto: shikadilord/wesnoth

void ttext::rerender(const bool force) const
{
	if(surface_dirty_ || force) {
		assert(layout_);

		recalculate(force);
		surface_dirty_ = false;

		int width  = rect_.x + rect_.width;
		int height = rect_.y + rect_.height;
		if(maximum_width_  > 0) { width  = std::min(width, maximum_width_); }
		if(maximum_height_ > 0) { height = std::min(height, maximum_height_); }

		cairo_format_t format = CAIRO_FORMAT_ARGB32;
		const unsigned stride = cairo_format_stride_for_width(format, width);

		create_surface_buffer(stride * height);

		cairo_surface_t* cairo_surface =
			cairo_image_surface_create_for_data(surface_buffer_, format, width, height, stride);
		cairo_t* cr = cairo_create(cairo_surface);

		/* set color (used for foreground). */
		cairo_set_source_rgba(cr,
			 (foreground_color_ >> 24)         / 256.0,
			((foreground_color_ >> 16) & 0xFF) / 256.0,
			((foreground_color_ >> 8)  & 0xFF) / 256.0,
			(foreground_color_         & 0xFF) / 256.0);

		pango_cairo_show_layout(cr, layout_);

		// The cairo surface is in CAIRO_FORMAT_ARGB32 which uses
		// pre-multiplied alpha. SDL doesn't use that so the pixels need to be
		// decoded again.
		for(int y = 0; y < height; ++y) {
			for(int x = 0; x < width; ++x) {
				unsigned char* pixel = &surface_buffer_[(y * width + x) * 4];
				decode_pixel(pixel);
			}
		}

		surface_.assign(SDL_CreateRGBSurfaceFrom(
			surface_buffer_, width, height, 32, stride, 0x00FF0000, 0x0000FF00, 0x000000FF, 0xFF000000));
		cairo_destroy(cr);
		cairo_surface_destroy(cairo_surface);
	}