1 files changed, 142 insertions, 0 deletions
diff --git a/sdl.cpp b/sdl.cpp
new file mode 100644
index 0000000..37b6f8e
--- /dev/null
+++ b/sdl.cpp
@@ -0,0 +1,142 @@
+#include <iostream>
+#include <SDL.h>
+#include "mandel.h"
+
+using namespace std;
+
+
+#if 1
+int main() {
+	if (SDL_Init(SDL_INIT_VIDEO) < 0) {
+		cerr << "SDL init error: " << SDL_GetError() << endl;
+		return 1;
+	}
+
+	SDL_Window *window = SDL_CreateWindow("Mandel", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 960, 640, SDL_WINDOW_SHOWN);
+	if (!window) {
+		cerr << "SDL window creation error: " << SDL_GetError() << endl;
+		return 1;
+	}
+
+	int w, h;
+	SDL_GetWindowSize(window, &w, &h);
+	Mandel *ctx = mandel_init(w, h);
+	Params par = mandel_default_params();
+	uint8_t *imgdata = new uint8_t[3 * w * h];
+	mandel_render(imgdata, ctx, &par);
+
+	SDL_Surface *mandelsurf = SDL_CreateRGBSurfaceFrom(imgdata, w, h, 24, 3 * w, 0x0000000ff, 0x0000ff00, 0x00ff0000, 0);
+
+	SDL_Surface *winsurf = SDL_GetWindowSurface(window);
+
+	SDL_BlitSurface(mandelsurf, nullptr, winsurf, nullptr);
+
+	SDL_UpdateWindowSurface(window);
+
+	while (true) {
+		const double min_img_size = min(par.imgw, mandel_imgh(ctx, &par));
+		const double scroll_dist = min_img_size * 0.1;
+
+		bool need_redraw = false;
+
+		SDL_Event e;
+		if (SDL_WaitEvent(&e) == 0) {
+			cerr << "SDL event wait error: " << SDL_GetError() << endl;
+			break;
+		}
+
+		switch (e.type) {
+			case SDL_QUIT:
+				break;
+
+			case SDL_KEYDOWN:
+				switch (e.key.keysym.sym) {
+					case SDLK_UP:
+						par.cy += scroll_dist;
+						need_redraw = true;
+						break;
+
+					case SDLK_DOWN:
+						par.cy -= scroll_dist;
+						need_redraw = true;
+						break;
+
+					case SDLK_RIGHT:
+						par.cx += scroll_dist;
+						need_redraw = true;
+						break;
+
+					case SDLK_LEFT:
+						par.cx -= scroll_dist;
+						need_redraw = true;
+						break;
+
+					case SDLK_KP_PLUS:
+					case SDLK_PLUS:
+					case SDLK_EQUALS:
+						par.imgw *= 0.8;
+						need_redraw = true;
+						break;
+
+					case SDLK_KP_MINUS:
+					case SDLK_MINUS:
+						par.imgw *= 1.25;
+						need_redraw = true;
+						break;
+
+					case SDLK_PAGEUP:
+						par.maxit += 128;
+						need_redraw = true;
+						break;
+
+					case SDLK_PAGEDOWN:
+						if (par.maxit > 256) {
+							par.maxit -= 128;
+							need_redraw = true;
+						}
+						break;
+
+					case SDLK_q:
+						goto cleanup;
+				}
+				break;
+
+			case SDL_WINDOWEVENT:
+				switch (e.window.event) {
+					case SDL_WINDOWEVENT_FOCUS_GAINED:
+						SDL_UpdateWindowSurface(window);
+						break;
+
+					case SDL_WINDOWEVENT_SIZE_CHANGED:
+						mandel_free(ctx);
+						delete[] imgdata;
+						SDL_FreeSurface(mandelsurf);
+
+						winsurf = SDL_GetWindowSurface(window);
+						SDL_GetWindowSize(window, &w, &h);
+						mandelsurf = SDL_CreateRGBSurfaceFrom(imgdata, w, h, 24, 3 * w, 0x0000000ff, 0x0000ff00, 0x00ff0000, 0);
+						ctx = mandel_init(w, h);
+						imgdata = new uint8_t[3 * w * h];
+						need_redraw = true;
+						break;
+				}
+				break;
+		}
+
+		if (need_redraw) {
+			SDL_GetWindowSize(window, &w, &h);
+			mandel_render(imgdata, ctx, &par);
+
+			if (SDL_MUSTLOCK(winsurf)) SDL_LockSurface(winsurf);
+			SDL_BlitSurface(mandelsurf, nullptr, winsurf, nullptr);
+			if (SDL_MUSTLOCK(winsurf)) SDL_UnlockSurface(winsurf);
+
+			SDL_UpdateWindowSurface(window);
+		}
+	}
+
+cleanup:
+	SDL_DestroyWindow(window);
+	SDL_Quit();
+}
+#endif