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#pragma once
#include "nes/common/types.hh"
#include "nes/app/graphics/color.hh"
#include "nes/app/graphics/text-attributes.hh"
#include "nes/common/string-builder.hh"
#include <string_view>
namespace nes
{
class display;
class rgb;
} // namespace nes
namespace nes::app
{
struct image_tile;
struct mask_tile;
class image_view;
/// Renders tiles and other primitive shapes onto a display.
///
/// The renderer sees the display as a canvas divided into 8x8 tiles. All elements (except shadows and borders) must
/// be arranged on this 8x8 grid.
class renderer
{
display& display_;
public:
static constexpr auto width = u32{ 32 };
static constexpr auto height = u32{ 30 };
explicit renderer(display&);
renderer(renderer const&) = delete;
renderer(renderer&&) = delete;
auto operator=(renderer const&) -> renderer& = delete;
auto operator=(renderer&&) -> renderer& = delete;
/// If set, add a drop shadow behind newly drawn opaque elements.
auto set_shadow(u32 x_px, u32 y_px, color) -> void;
/// If set, add an inner border inside newly drawn opaque elements.
auto set_border(u32 px, color) -> void;
/// Render a colored tile at the given tile coordinates.
auto render_image_tile(i32 x, i32 y, image_tile const&) -> void;
/// Render an alpha-only tile at the given tile coordinates with the given color.
auto render_mask_tile(i32 x, i32 y, mask_tile, color) -> void;
/// Render an image at the given tile coordinates.
auto render_image(i32 x, i32 y, image_view) -> void;
/// Render a string of text at the given tile coordinates (one tile per character).
auto render_text(i32 x, i32 y, std::string_view, color, text_attributes = text_attributes{}) -> void;
template<typename... Args>
auto render_text_format(
i32 const x, i32 const y, color const c, text_attributes const attrs, std::string_view const fmt,
Args... args) -> void
{
char buffer[width];
auto const str = string_builder{ buffer, sizeof(buffer) }.append_format(fmt, args...).get_result();
render_text(x, y, str, c, attrs);
}
template<typename... Args>
auto render_text_format(
i32 const x, i32 const y, color const c, std::string_view const fmt, Args... args) -> void
{
render_text_format(x, y, c, text_attributes{}, fmt, args...);
}
/// Render a rectangle at the given tile coordinates with a given size (measured in tiles).
auto render_rect(i32 x, i32 y, u32 width, u32 height, color) -> void;
/// Completely fill the screen.
auto render_fill(color) -> void;
private:
auto resolve_color(color) const -> rgb;
auto resolve_character(u32) const -> mask_tile;
};
} // namespace nes::app
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