spicetools/overlay/imgui/impl_sw.h

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2024-08-28 15:10:34 +00:00
// Original File By Emil Ernerfeldt 2018
// https://github.com/emilk/imgui_software_renderer
// LICENSE:
// This software is dual-licensed to the public domain and under the following
// license: you are granted a perpetual, irrevocable license to copy, modify,
// publish, and distribute this file as you see fit.
// WHAT:
// This is a software renderer for Dear ImGui.
// It is decently fast, but has a lot of room for optimization.
// The goal was to get something fast and decently accurate in not too many lines of code.
// LIMITATIONS:
// * It is not pixel-perfect, but it is good enough for must use cases.
// * It does not support painting with any other texture than the default font texture.
#pragma once
#include <cstdint>
namespace imgui_sw {
struct SwOptions
{
bool optimize_text = true; // No reason to turn this off.
bool optimize_rectangles = true; // No reason to turn this off.
};
struct Stats
{
int uniform_triangle_pixels = 0;
int textured_triangle_pixels = 0;
int gradient_triangle_pixels = 0;
int font_pixels = 0;
double uniform_rectangle_pixels = 0;
double textured_rectangle_pixels = 0;
double gradient_rectangle_pixels = 0;
double gradient_textured_rectangle_pixels = 0;
};
/// Optional: tweak ImGui style to make it render faster.
void make_style_fast();
/// Undo what make_style_fast did.
void restore_style();
/// Call once a the start of your program.
void bind_imgui_painting();
/// The buffer is assumed to follow how ImGui packs pixels, i.e. ABGR by default.
/// Change with IMGUI_USE_BGRA_PACKED_COLOR.
/// If width/height differs from ImGui::GetIO().DisplaySize then
/// the function scales the UI to fit the given pixel buffer.
void paint_imgui(uint32_t* pixels, int width_pixels, int height_pixels, const SwOptions& options = {});
/// Free the resources allocated by bind_imgui_painting.
void unbind_imgui_painting();
/// Show ImGui controls for rendering options if you want to.
bool show_options(SwOptions* io_options);
/// Show rendering stats in an ImGui window if you want to.
void show_stats();
Stats get_stats();
} // namespace imgui_sw