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ModuleRender.cpp
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#include "Globals.h"
#include "Application.h"
#include "ModuleRender.h"
#include "ModuleWindow.h"
#include "ModuleInput.h"
#include "SDL/include/SDL.h"
ModuleRender::ModuleRender()
{
camera.x = camera.y = 0;
camera.w = SCREEN_WIDTH * SCREEN_SIZE;
camera.h = SCREEN_HEIGHT* SCREEN_SIZE;
}
// Destructor
ModuleRender::~ModuleRender()
{}
// Called before render is available
bool ModuleRender::Init()
{
LOG("Creating Renderer context");
bool ret = true;
Uint32 flags = 0;
if(VSYNC == true)
{
flags |= SDL_RENDERER_PRESENTVSYNC;
}
renderer = SDL_CreateRenderer(App->window->window, -1, flags);
if(renderer == nullptr)
{
LOG("Renderer could not be created! SDL_Error: %s\n", SDL_GetError());
ret = false;
}
return ret;
}
update_status ModuleRender::PreUpdate()
{
SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
SDL_RenderClear(renderer);
return UPDATE_CONTINUE;
}
// Called every draw update
update_status ModuleRender::Update()
{
// debug camera
int speed = 1;
if(App->input->GetKey(SDL_SCANCODE_UP) == KEY_REPEAT)
App->renderer->camera.y += speed;
if(App->input->GetKey(SDL_SCANCODE_DOWN) == KEY_REPEAT)
App->renderer->camera.y -= speed;
if(App->input->GetKey(SDL_SCANCODE_LEFT) == KEY_REPEAT)
App->renderer->camera.x += speed;
if(App->input->GetKey(SDL_SCANCODE_RIGHT) == KEY_REPEAT)
App->renderer->camera.x -= speed;
return UPDATE_CONTINUE;
}
update_status ModuleRender::PostUpdate()
{
SDL_RenderPresent(renderer);
return UPDATE_CONTINUE;
}
// Called before quitting
bool ModuleRender::CleanUp()
{
LOG("Destroying renderer");
//Destroy window
if(renderer != nullptr)
{
SDL_DestroyRenderer(renderer);
}
return true;
}
// Blit to screen
bool ModuleRender::Blit(SDL_Texture* texture, int x, int y, SDL_Rect* section, float speed)
{
bool ret = true;
SDL_Rect rect;
rect.x = (int)(camera.x * speed) + x * SCREEN_SIZE;
rect.y = (int)(camera.y * speed) + y * SCREEN_SIZE;
if(section != NULL)
{
rect.w = section->w;
rect.h = section->h;
}
else
{
SDL_QueryTexture(texture, NULL, NULL, &rect.w, &rect.h);
}
rect.w *= SCREEN_SIZE;
rect.h *= SCREEN_SIZE;
if(SDL_RenderCopy(renderer, texture, section, &rect) != 0)
{
LOG("Cannot blit to screen. SDL_RenderCopy error: %s", SDL_GetError());
ret = false;
}
return ret;
}
//Blit with pivot
bool ModuleRender::BlitWithPivotDownCenter(SDL_Texture* texture, int x, int y, SDL_Rect* section, float speed) {
return Blit(texture, x - section->w/2, y - section->h, section, speed);
}
bool ModuleRender::BlitWithPivotUpRight(SDL_Texture* texture, int x, int y, SDL_Rect* section, float speed) {
return Blit(texture, x - section->w, y, section, speed);
}