本文整理汇总了C++中clan::Canvas::get_pixeldata方法的典型用法代码示例。如果您正苦于以下问题：C++ Canvas::get_pixeldata方法的具体用法？C++ Canvas::get_pixeldata怎么用？C++ Canvas::get_pixeldata使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类clan::Canvas的用法示例。
在下文中一共展示了Canvas::get_pixeldata方法的2个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: draw_section
void Alpha::draw_section(clan::Canvas &canvas, clan::Font &font, int yoffset, const clan::Colorf &background, const clan::Colorf &vertex_colour, const clan::Colorf &image_colour)
{
// Draw the background without blending to set the specified RGBA
canvas.set_blend_state(blend_disabled);
const int outer_area_size = 32;
const int outer_xoffset = 8;
canvas.fill_rect( outer_xoffset, yoffset, outer_xoffset + outer_area_size, yoffset + outer_area_size, background);
canvas.set_blend_state(blend_enabled);
// Create the image
clan::Image image = create_block(canvas, image_colour);
// Draw the image
image.set_color(vertex_colour);
image.draw(canvas, outer_xoffset + (outer_area_size - image.get_width())/2, yoffset + (outer_area_size - image.get_height())/2);
// Get the composited pixel buffer
clan::Rect rect(outer_xoffset + outer_area_size / 2, (yoffset + outer_area_size / 2), clan::Size(64,64));
clan::PixelBuffer pbuff = canvas.get_pixeldata(rect, clan::tf_rgba8);
pbuff.lock(canvas, clan::access_read_only);
clan::ImageProviderFactory::save(pbuff, "test.png");
clan::Colorf output = pbuff.get_pixel(0,0);
pbuff.unlock();
// Create the information string
std::string info(clan::string_format("Initial Destination Colour: RGBA = %1, %2, %3, %4", background.r , background.g, background.b, background.a));
int xpos = outer_xoffset + outer_area_size + 8;
int ypos = yoffset - 4;
font.draw_text(canvas, xpos, ypos, info, clan::Colorf::black);
info = std::string(clan::string_format("Vertex Colour: RGBA = %1, %2, %3, %4", vertex_colour.r , vertex_colour.g, vertex_colour.b, vertex_colour.a));
ypos += 16;
font.draw_text(canvas, xpos, ypos, info, clan::Colorf::black);
info = std::string(clan::string_format("Image Colour: RGBA = %1, %2, %3, %4", image_colour.r , image_colour.g, image_colour.b, image_colour.a));
ypos += 16;
font.draw_text(canvas, xpos, ypos, info, clan::Colorf::black);
info = std::string(clan::string_format("Destination Colour: RGBA = %1, %2, %3, %4", output.r , output.g, output.b, output.a));
ypos += 16;
font.draw_text(canvas, xpos, ypos, info, clan::Colorf::black);
}示例2: draw_section
void Alpha::draw_section(clan::Canvas &canvas, clan::Font &font, int yoffset, const clan::Colorf &background, const clan::Colorf &vertex_colour, const clan::Colorf &image_colour)
{
// Draw the background without blending to set the specified RGBA
canvas.set_blend_state(blend_disabled);
const int outer_area_size = 32;
const int outer_xoffset = 8;
canvas.fill_rect( outer_xoffset, yoffset, outer_xoffset + outer_area_size, yoffset + outer_area_size, background);
canvas.set_blend_state(blend_enabled);
// Create the image
clan::Image image = create_block(canvas, image_colour);
// Draw the image
image.set_color(vertex_colour);
image.draw(canvas, outer_xoffset + (outer_area_size - image.get_width())/2, yoffset + (outer_area_size - image.get_height())/2);
clan::Colorf output;
// Get the composited pixel buffer
clan::Rectf rect(outer_xoffset + outer_area_size / 2, (yoffset + outer_area_size / 2), clan::Sizef(64,64));
if (rect.is_inside(canvas.get_size()))
{
clan::PixelBuffer pbuff = canvas.get_pixeldata(rect, clan::tf_rgba8);
pbuff.lock(canvas, clan::access_read_only);
//clan::ImageProviderFactory::save(pbuff, "test.png");
clan::Colorf output = pbuff.get_pixel(0, 0);
pbuff.unlock();
}
// Create the information string
std::string info(clan::string_format("Background = %1, %2, %3, %4", get_text(background.r), get_text(background.g), get_text(background.b), get_text(background.a)));
int xpos = outer_xoffset + outer_area_size + 8;
int ypos = yoffset + 12;
font.draw_text(canvas, xpos, ypos, info, clan::Colorf::black);
info = std::string(clan::string_format("Vertex = %1, %2, %3, %4", get_text(vertex_colour.r), get_text(vertex_colour.g), get_text(vertex_colour.b), get_text(vertex_colour.a)));
font.draw_text(canvas, xpos + 250, ypos, info, clan::Colorf::black);
info = std::string(clan::string_format("Image = %1, %2, %3, %4", get_text(image_colour.r), get_text(image_colour.g), get_text(image_colour.b), get_text(image_colour.a)));
font.draw_text(canvas, xpos + 500, ypos, info, clan::Colorf::black);
ypos += 20;
clan::Colorf source(vertex_colour * image_colour);
clan::Colorf calculated;
calculated.r = source.a * source.r + (1.0f - source.a) * background.r;
calculated.g = source.a * source.g + (1.0f - source.a) * background.g;
calculated.b = source.a * source.b + (1.0f - source.a) * background.b;
calculated.a = source.a + (1.0f - source.a) * background.a;
info = std::string(clan::string_format("Source = %1, %2, %3, %4", get_text(source.r), get_text(source.g), get_text(source.b), get_text(source.a)));
font.draw_text(canvas, xpos, ypos, info, clan::Colorf::black);
info = std::string(clan::string_format("Calculated = %1, %2, %3, %4", get_text(calculated.r), get_text(calculated.g), get_text(calculated.b), get_text(calculated.a)));
font.draw_text(canvas, xpos + 250, ypos, info, clan::Colorf::black);
info = std::string(clan::string_format("Actual = %1, %2, %3, %4", get_text(output.r), get_text(output.g), get_text(output.b), get_text(output.a)));
font.draw_text(canvas, xpos + 500, ypos, info, clan::Colorf::black);
}