starfighter/src/renderer.c

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/*
Copyright (C) 2003 Parallel Realities
Copyright (C) 2011, 2012, 2013 Guus Sliepen
Copyright (C) 2015-2019 Layla Marchant <diligentcircle@riseup.net>
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This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "SDL.h"
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#include "defs.h"
#include "structs.h"
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#include "screen.h"
#include "window.h"
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SDL_Renderer *renderer;
SDL_Texture *renderer_texture;
void renderer_update()
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{
SDL_UpdateTexture(renderer_texture, NULL, screen->pixels, screen->pitch);
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SDL_RenderCopy(renderer, renderer_texture, NULL, NULL);
SDL_RenderPresent(renderer);
}
// Call after screen_adjustDimensions.
void renderer_reset()
{
if (renderer == NULL)
{
renderer = SDL_CreateRenderer(window, -1, 0);
if (renderer == NULL)
{
printf("Could not create renderer: %s\n", SDL_GetError());
exit(1);
}
}
SDL_RenderSetLogicalSize(renderer, screen->w, screen->h);
if (renderer_texture != NULL)
{
SDL_DestroyTexture(renderer_texture);
renderer_texture = NULL;
}
renderer_texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB8888, SDL_TEXTUREACCESS_STREAMING, screen->w, screen->h);
if (renderer_texture == NULL)
{
printf("Couldn't create %ix%ix32 texture: %s\n", screen->w, screen->h, SDL_GetError());
exit(1);
}
}