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#include "renderer.h"
#include "consts.h"
#include "game.h"
#include "map.h"
#include "transform_system.h"
#include "camera_system.h"
#include "message_system.h"
Renderer::Renderer() {
win_ = window_ptr(
SDL_CreateWindow(
"Tanetane",
100,
100,
GAME_WIDTH,
GAME_HEIGHT,
SDL_WINDOW_SHOWN));
if (!win_)
{
throw sdl_error();
}
ren_ = renderer_ptr(
SDL_CreateRenderer(
win_.get(),
-1,
SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC));
if (!ren_)
{
throw sdl_error();
}
}
texture_ptr Renderer::renderMapLayer(const Map& map, int layer) {
vec2i mapBounds = map.getMapSize() * map.getTileSize();
texture_ptr canvas(
SDL_CreateTexture(
ren_.get(),
SDL_PIXELFORMAT_RGBA8888,
SDL_TEXTUREACCESS_TARGET,
mapBounds.w(),
mapBounds.h()));
SDL_SetTextureBlendMode(canvas.get(), SDL_BLENDMODE_BLEND);
SDL_SetRenderTarget(ren_.get(), canvas.get());
SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_BLEND);
SDL_SetRenderDrawColor(ren_.get(), 255, 255, 255, 0);
SDL_RenderClear(ren_.get());
const std::vector<Tile>& tiles = map.getLayers().at(layer);
for (int y = 0; y < map.getMapSize().h(); y++) {
for (int x = 0; x < map.getMapSize().w(); x++) {
const Tile& tile = tiles.at(x + y * map.getMapSize().w());
SDL_Rect srcRect {
static_cast<int>((tile.id % map.getTilesetColumns()) * map.getTileSize().w()),
static_cast<int>((tile.id / map.getTilesetColumns()) * map.getTileSize().h()),
map.getTileSize().w(),
map.getTileSize().h() };
SDL_Rect destRect {
x * map.getTileSize().w(),
y * map.getTileSize().h(),
map.getTileSize().w(),
map.getTileSize().h() };
SDL_RendererFlip flip = SDL_FLIP_NONE;
if (tile.flipHorizontal && tile.flipVertical) {
flip = static_cast<SDL_RendererFlip>(SDL_FLIP_HORIZONTAL | SDL_FLIP_VERTICAL);
} else if (tile.flipHorizontal) {
flip = SDL_FLIP_HORIZONTAL;
} else if (tile.flipVertical) {
flip = SDL_FLIP_VERTICAL;
}
SDL_RenderCopyEx(ren_.get(), textures_[map.getTilesetTextureId()].get(), &srcRect, &destRect, 0, nullptr, flip);
}
}
return canvas;
}
void Renderer::render(Game& game) {
if (!renLay1_) {
renLay1_ = renderMapLayer(game.getMap(), 0);
}
if (!renLay0_) {
renLay0_ = renderMapLayer(game.getMap(), 1);
}
vec2i mapBounds = game.getMap().getMapSize() * game.getMap().getTileSize();
texture_ptr canvas(
SDL_CreateTexture(
ren_.get(),
SDL_PIXELFORMAT_RGBA8888,
SDL_TEXTUREACCESS_TARGET,
mapBounds.w(),
mapBounds.h()));
if (!canvas) {
throw sdl_error();
}
SDL_SetRenderTarget(ren_.get(), canvas.get());
SDL_SetRenderDrawBlendMode(ren_.get(), SDL_BLENDMODE_NONE);
SDL_SetRenderDrawColor(ren_.get(), 255, 255, 255, 255);
SDL_RenderClear(ren_.get());
SDL_RenderCopy(ren_.get(), renLay1_.get(), nullptr, nullptr);
for (const Sprite& sprite : game.getSystem<TransformSystem>().getSpritesByY() | game.spriteView()) {
const SpriteFrame& frame = sprite.frames.at(sprite.animations.at(sprite.animationId).at(sprite.animationFrame));
const SDL_Rect& src = frame.srcRect;
SDL_Rect dest { sprite.loc.x() - frame.center.x(), sprite.loc.y() - frame.center.y(), frame.size.w(), frame.size.h() };
SDL_RenderCopy(ren_.get(), textures_.at(sprite.textureId).get(), &src, &dest);
}
SDL_RenderCopy(ren_.get(), renLay0_.get(), nullptr, nullptr);
SDL_Rect cameraField {
game.getSystem<CameraSystem>().getCameraPosition().x(),
game.getSystem<CameraSystem>().getCameraPosition().y(),
game.getSystem<CameraSystem>().getFieldOfView().w(),
game.getSystem<CameraSystem>().getFieldOfView().h()
};
texture_ptr cameraTex(
SDL_CreateTexture(
ren_.get(),
SDL_PIXELFORMAT_RGBA8888,
SDL_TEXTUREACCESS_TARGET,
CANVAS_WIDTH,
CANVAS_HEIGHT));
if (!cameraTex) {
throw sdl_error();
}
SDL_SetRenderTarget(ren_.get(), cameraTex.get());
SDL_RenderCopy(ren_.get(), canvas.get(), &cameraField, nullptr);
if (game.getSystem<MessageSystem>().getCutsceneBarsProgress() > 0) {
SDL_SetRenderDrawColor(ren_.get(), 0, 0, 0, 255);
int topBarHeight = 16.0 * game.getSystem<MessageSystem>().getCutsceneBarsProgress();
SDL_Rect topBar { 0, 0, CANVAS_WIDTH, topBarHeight };
SDL_RenderFillRect(ren_.get(), &topBar);
int bottomBarHeight = 36.0 * game.getSystem<MessageSystem>().getCutsceneBarsProgress();
SDL_Rect bottomBar { 0, CANVAS_HEIGHT - bottomBarHeight, CANVAS_WIDTH, bottomBarHeight };
SDL_RenderFillRect(ren_.get(), &bottomBar);
}
SDL_SetRenderTarget(ren_.get(), nullptr);
SDL_RenderCopy(ren_.get(), cameraTex.get(), nullptr, nullptr);
SDL_RenderPresent(ren_.get());
}
int Renderer::loadImageFromFile(std::string_view filename) {
surface_ptr pfs(IMG_Load(filename.data()));
if (!pfs)
{
throw img_error();
}
texture_ptr tex = texture_ptr(SDL_CreateTextureFromSurface(ren_.get(), pfs.get()));
//SDL_SetTextureBlendMode(tex, SDL_BLENDMODE_BLEND);
int texId = textures_.size();
textures_.push_back(std::move(tex));
return texId;
}
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