Renderive/Core/primitive/Raster_Image.cpp

#include "Raster_Image_p.h"
#include "../Axis/Abs_Axis_p.h"
#include "../base/Memory.h"
#include "../render/Canvas.h"
namespace renderive {
struct Raster_Image_Input_Data : Latest_Input_Data {
    Image image;
    void push(const Image& value) {
        image = value;
        mark_latest_pushed();
    }
    template <typename Handler>
    void read_all(Handler handler) {
        if (pending)
            handler(image);
    }
    void clear() override {
        image = Image();
        clear_latest();
    }
};
struct Raster_Image_Render_State : Render_State, Raster_Image_Prop {};
struct Raster_Image_Private : Typed_Render_Data<Raster_Image, Raster_Image_Render_State, Raster_Image_Input_Data> {
    Image image;
    void prepare_data(const Render_Frame_Snapshot&) override {
        sync_state_pipeline();
        Raster_Image_Input_Data* input = render_input_data();
        input->read_all([this](const Image& value) {
            image = value;
        });
        clear_render_input();
    }
    void draw(Canvas& canvas, const Render_Frame_Snapshot&) override {
        Raster_Image_Render_State* s = render_state();
        auto domain_axis = s->domain_axis.lock();
        auto value_axis = s->value_axis.lock();
        if (!domain_axis || !value_axis || image.empty())
            return;
        if (s->domain_range.length() == 0.0 || s->value_range.length() == 0.0)
            return;
        Axis_Mapping_2D mapping = Axis_Render_Access::mapping(domain_axis.get(), value_axis.get());
        Axis_Basis_2D basis = Axis_Basis_2D::from_ranges(mapping, s->domain_range, s->value_range);
        RectF source_rect = s->source_rect.empty() ? RectF{0.0, 0.0, (double)image.width(), (double)image.height()} : s->source_rect;
        if (source_rect.width == 0.0 || source_rect.height == 0.0)
            return;
        canvas.save();
        canvas.set_image_interpolation(s->interpolation_mode);
        canvas.transform(
            basis.domain_vector.x / source_rect.width,
            basis.domain_vector.y / source_rect.width,
            basis.value_vector.x / source_rect.height,
            basis.value_vector.y / source_rect.height,
            basis.origin.x,
            basis.origin.y);
        canvas.draw_image(RectF{0.0, 0.0, source_rect.width, source_rect.height}, image, source_rect);
        canvas.restore();
    }
};
RENDERIVE_DEFINE_RENDERABLE_BINDING(Raster_Image, Raster_Image_Private, Raster_Image_Render_State, Raster_Image_Input_Data, "RasterImage")
void Raster_Image::update_image(const Image& image) {
    if (!ok())
        return;
    Render_Input_Lease<Raster_Image_Private, Raster_Image_Input_Data> input(d());
    input->push(image);
}
void Raster_Image::update_image_frame(const Image& image, Range domain_range, Range value_range, RectF source_rect, Image_Interpolation_Mode interpolation_mode) {
    if (domain_range.length() == 0.0 || value_range.length() == 0.0)
        return;
    if (!ok())
        return;
    Raster_Image_Private* pd = d();
    Render_Edit_Lease<Raster_Image_Private, Raster_Image_Render_State> edit(pd);
    if (!edit)
        return;
    edit->domain_range = domain_range;
    edit->value_range = value_range;
    edit->source_rect = source_rect;
    edit->interpolation_mode = interpolation_mode;
    Render_Input_Lease<Raster_Image_Private, Raster_Image_Input_Data> input(pd);
    input->push(image);
}
RENDERIVE_DEFINE_WEAK_STATE_PROP(Raster_Image, Raster_Image_Render_State, Abs_Axis, domain_axis)
RENDERIVE_DEFINE_WEAK_STATE_PROP(Raster_Image, Raster_Image_Render_State, Abs_Axis, value_axis)
Range Raster_Image::domain_range() {
    return d()->edit_state_value(&Raster_Image_Render_State::domain_range);
}
void Raster_Image::set_domain_range(Range value) {
    if (value.length() == 0.0)
        return;
    d()->set_state_value(&Raster_Image_Render_State::domain_range, value);
}
Range Raster_Image::value_range() {
    return d()->edit_state_value(&Raster_Image_Render_State::value_range);
}
void Raster_Image::set_value_range(Range value) {
    if (value.length() == 0.0)
        return;
    d()->set_state_value(&Raster_Image_Render_State::value_range, value);
}
RENDERIVE_DEFINE_STATE_PROP(Raster_Image, Raster_Image_Render_State, RectF, source_rect)
RENDERIVE_DEFINE_STATE_PROP(Raster_Image, Raster_Image_Render_State, Image_Interpolation_Mode, interpolation_mode)
Raster_Image::Builder::Builder(std::shared_ptr<Renderable> parent, std::shared_ptr<Abs_Axis> domain_axis, std::shared_ptr<Abs_Axis> value_axis) {
    ASSERT(parent, "Raster_Image build error! parent == nullptr");
    ASSERT(domain_axis && value_axis, "Raster_Image build error! axis == nullptr");
    ASSERT(domain_axis->attached_to_plot(), "Raster_Image build error! domain_axis->plot == nullptr");
    ASSERT(domain_axis->shares_plot_with(*value_axis), "Raster_Image build error! domain_axis->plot != value_axis->plot");
    ASSERT(parent->shares_plot_with(*domain_axis), "Raster_Image build error! parent->plot != axis->plot");
    ASSERT(domain_axis->orientation() != value_axis->orientation(), "Raster_Image build error! axes must be orthogonal");
    this->parent = parent;
    this->domain_axis = domain_axis;
    this->value_axis = value_axis;
}
std::shared_ptr<Raster_Image> Raster_Image::Builder::build() {
    auto ret = renderive::make_shared<Raster_Image>();
    ret->init(parent);
    Raster_Image_Private* pd = ret->d();
    Render_Edit_Lease<Raster_Image_Private, Raster_Image_Render_State> edit(pd);
    Raster_Image_Render_State* sc = edit.operator->();
    PROP_R(std::weak_ptr<Abs_Axis>, domain_axis)
    PROP_R(std::weak_ptr<Abs_Axis>, value_axis)
    PROP_R(Range, domain_range)
    PROP_R(Range, value_range)
    PROP_R(RectF, source_rect)
    PROP_R(Image_Interpolation_Mode, interpolation_mode)
    if (sc->domain_range.length() == 0.0)
        sc->domain_range = {0.0, 1.0};
    if (sc->value_range.length() == 0.0)
        sc->value_range = {0.0, 1.0};
    return ret;
}
} // namespace renderive