From a9630341c7dfb3834e00a43a6f24c871daf18550 Mon Sep 17 00:00:00 2001
From: Michele Santullo <king_duckz@gmx.com>
Date: Fri, 22 May 2015 14:50:10 +0200
Subject: [PATCH] Draw tiles.

---
 test/main.cpp | 37 ++++++++++++++++++++++++++++++++++++-
 1 file changed, 36 insertions(+), 1 deletion(-)

diff --git a/test/main.cpp b/test/main.cpp
index d84a581..b2738eb 100644
--- a/test/main.cpp
+++ b/test/main.cpp
@@ -40,6 +40,7 @@ namespace {
 	void addLayer ( dk::Tyler<2>& parTiler, LayerWithData<dkh::AsciiMapSource, int>& parLayerInfo, const char* parPath );
 	void printViewport ( const dk::Viewport<2>& parView, const dk::Layer<int, 2>& parLayer );
 	std::pair<int, std::string> GetRenderingDriver ( void );
+	void draw_tiles ( SDL_Renderer* parRenderer, SDL_Texture* parTile0, SDL_Texture* parTile1, const dk::Viewport<2>& parView, const dk::Layer<int, 2>& parLayer, int parYOffs );
 } //unnamed namespace
 
 int main() {
@@ -54,7 +55,7 @@ int main() {
 	printWelcome();
 
 	SDLWindowUPtr sdl_window(
-		SDL_CreateWindow("DoorKeeper test", 100, 100, 320, 240, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE),
+		SDL_CreateWindow("DoorKeeper test", 100, 100, 128 * 6, 128 * 4, SDL_WINDOW_SHOWN | SDL_WINDOW_RESIZABLE),
 		&SDL_DestroyWindow
 	);
 	const auto rendererDriver = GetRenderingDriver();
@@ -88,8 +89,18 @@ int main() {
 
 	//Main loop
 	bool running = true;
+	int y = 0;
+	dk::Viewport<2> viewport(tiler, coords2(6, 4), coords2(0));
 	do {
+		SDL_RenderClear(sdl_renderer.get());
+		viewport.setFrom(coords2(0, y / 128));
+		draw_tiles(sdl_renderer.get(), tile_0.get(), tile_1.get(), viewport, *bottomLayer.layer, -(y % 128));
+		++y;
+		if (128 * bottomLayer.layer->mapSize().y() == y)
+			y = 0;
+		SDL_RenderPresent(sdl_renderer.get());
 
+		SDL_Delay(1000 / 60);
 		SDL_Event eve;
 		while (SDL_PollEvent(&eve)) {
 			switch (eve.type) {
@@ -198,4 +209,28 @@ namespace {
 
 		return RetPairType(-1, "default");
 	}
+
+	void draw_tiles (SDL_Renderer* parRenderer, SDL_Texture* parTile0, SDL_Texture* parTile1, const dk::Viewport<2>& parView, const dk::Layer<int, 2>& parLayer, int parYOffs) {
+		SDL_Rect rect_src;
+		rect_src.x = rect_src.y = 0;
+		SDL_QueryTexture(parTile0, nullptr, nullptr, &rect_src.w, &rect_src.h);
+
+		int col = 0;
+		int row = 0;
+		const auto tilecount = parView.count();
+		for (auto itTile = parView.begin(parLayer), itTileEND = parView.end(parLayer); itTile != itTileEND; ++itTile) {
+			if (col == tilecount.x()) {
+				col = 0;
+				++row;
+			}
+			SDL_Rect rect_dst;
+			rect_dst.x = col * rect_src.w;
+			rect_dst.y = row * rect_src.h + parYOffs;
+			rect_dst.w = rect_src.w;
+			rect_dst.h = rect_src.h;
+			SDL_Texture* const curr_texture = (1 == *itTile ? parTile1 : parTile0);
+			SDL_RenderCopy(parRenderer, curr_texture, &rect_src, &rect_dst);
+			++col;
+		}
+	}
 } //unnamed namespace