Move render function to new source file

1 files changed, 148 insertions, 0 deletions

diff --git a/src/view/MapView.cpp b/src/view/MapView.cpp
new file mode 100644
index 0000000..788cee9
--- /dev/null
+++ b/src/view/MapView.cpp
@@ -0,0 +1,148 @@
+/*
+  Copyright (c) 2014, Matthias Schiffer <mschiffer@universe-factory.net>
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are met:
+
+    1. Redistributions of source code must retain the above copyright notice,
+       this list of conditions and the following disclaimer.
+    2. Redistributions in binary form must reproduce the above copyright notice,
+       this list of conditions and the following disclaimer in the documentation
+       and/or other materials provided with the distribution.
+
+  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
+  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
+  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include "MapView.hpp"
+
+
+namespace RPGEdit {
+
+namespace View {
+
+MapView::MapView(const std::shared_ptr<Window> &window0,
+	const std::shared_ptr<const Model::Map> &map0,
+	const std::vector<SDL_Surface *> &tiles,
+	const std::map<std::string, SDL_Surface *> &entities)
+	: window(window0), map(map0) {
+	uint32_t rmask, gmask, bmask, amask;
+
+#if SDL_BYTEORDER == SDL_BIG_ENDIAN
+	rmask = 0xff000000;
+	gmask = 0x00ff0000;
+	bmask = 0x0000ff00;
+	amask = 0x000000ff;
+#else
+	rmask = 0x000000ff;
+	gmask = 0x0000ff00;
+	bmask = 0x00ff0000;
+	amask = 0xff000000;
+#endif
+
+	SDL_Surface *surface = SDL_CreateRGBSurface(0, 16*tiles.size(), 16, 32, rmask, gmask, bmask, amask);
+	SDL_SetSurfaceBlendMode(surface, SDL_BLENDMODE_NONE);
+
+	for (size_t i = 0; i < tiles.size(); i++) {
+		SDL_Rect rect = {
+			.x = int(16*i),
+			.y = 0,
+			.w = 0,
+			.h = 0,
+		};
+
+		SDL_BlitSurface(tiles[i], nullptr, surface, &rect);
+		}
+
+	tileTexture = SDL_CreateTextureFromSurface(window->getRenderer(), surface);
+	SDL_FreeSurface(surface);
+
+	for (const std::pair<std::string, SDL_Surface *> &entity : entities) {
+		entityTextures[entity.first] = SDL_CreateTextureFromSurface(window->getRenderer(), entity.second);
+	}
+}
+
+MapView::~MapView() {
+	SDL_DestroyTexture(tileTexture);
+
+	for (const std::pair<std::string, SDL_Texture *> &entity : entityTextures)
+		SDL_DestroyTexture(entity.second);
+}
+
+void MapView::render(float centerX, float centerY) {
+	SDL_RenderClear(window->getRenderer());
+
+	std::pair<int, int> viewport = window->getViewport();
+
+	float pixels = std::max(viewport.first/16.0f, viewport.second/12.0f);
+	int tilePixels = 16 * std::ceil(pixels / 16);
+
+	float tilesW = viewport.first / tilePixels;
+	float tilesH = viewport.second / tilePixels;
+
+	int minX = std::floor(centerX - tilesW/2 - 0.5f), maxX = std::ceil(centerX + tilesW/2 + 0.5f);
+	int minY = std::floor(centerY - tilesH/2 - 0.5f), maxY = std::ceil(centerY + tilesH/2 + 0.5f);
+
+	int baseX = viewport.first/2 - (centerX + 0.5f)*tilePixels, baseY = viewport.second/2 - (centerY + 0.5f)*tilePixels;
+
+	for (int x = minX; x <= maxX; x++) {
+		for (int y = minY; y <= maxY; y++) {
+			uint32_t tile = map->getTileAt(x, y);
+			if (!tile)
+				continue;
+
+			SDL_Rect src = {
+				.x = int(16*(tile-1)),
+				.y = 0,
+				.w = 16,
+				.h = 16,
+			};
+
+			SDL_Rect dst = {
+				.x = baseX + x*tilePixels,
+				.y = baseY + y*tilePixels,
+				.w = tilePixels,
+				.h = tilePixels,
+			};
+
+			SDL_RenderCopy(window->getRenderer(), tileTexture, &src, &dst);
+		}
+	}
+
+	for (const std::shared_ptr<Model::Entity> &entity : map->getEntities()) {
+		std::pair<float, float> pos = entity->getPosition();
+		Direction dir = entity->getDirection();
+
+		SDL_Rect src = {
+			.x = 16*dir,
+			.y = 0,
+			.w = 16,
+			.h = 16,
+		};
+
+		SDL_Rect dst = {
+			.x = baseX + int(pos.first*tilePixels),
+			.y = baseY + int(pos.second*tilePixels),
+			.w = tilePixels,
+			.h = tilePixels,
+		};
+
+		SDL_RenderCopy(window->getRenderer(), entityTextures[entity->getName()], &src, &dst);
+		}
+
+	SDL_RenderPresent(window->getRenderer());
+}
+
+}
+
+}