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| int SDL_RenderClear(void) | int SDL_RenderClear(SDL_Renderer* renderer) |
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== Function Parameters == ||'''renderer'''||the rendering context|| |
SDL_RenderClear
Use this function to clear the current rendering target with the drawing color.
Contents
Syntax
int SDL_RenderClear(SDL_Renderer* renderer)
Function Parameters
renderer |
the rendering context |
Return Value
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Code Examples
#include <SDL/SDL.h>
int main(int argc, char** argv)
{
// Initialize SDL.
if (SDL_Init(SDL_INIT_VIDEO) < 0)
return 1;
// Create the window were we will draw.
SDL_Window* window =
SDL_CreateWindow("SDL_RenderClear",
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
512, 512,
SDL_WINDOW_SHOWN);
// We must call SDL_CreateRenderer in order for draw calls to affect this window.
SDL_CreateRenderer(window, -1, 0);
// Select the color for drawing. It is set to red here.
SDL_SetRenderDrawColor(255, 0, 0, 0);
// Clear the entire screen to our selected color.
SDL_RenderClear();
// Up until now everything was drawn behind the scenes.
// This will show the new, red contents of the window.
SDL_RenderPresent();
// Give us time to see the window.
SDL_Delay(5000);
// Always be sure to clean up
SDL_Quit();
return 0;
}
Remarks
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