Set the color used for drawing operations (Rect, Line and Clear).
int SDL_SetRenderDrawColor(SDL_Renderer *renderer, Uint8 r, Uint8 g, Uint8 b, Uint8 a);| renderer | the rendering context |
| r | the red value used to draw on the rendering target |
| g | the green value used to draw on the rendering target |
| b | the blue value used to draw on the rendering target |
| a | the alpha value used to draw on the rendering target; usually SDL_ALPHA_OPAQUE (255). Use SDL_SetRenderDrawBlendMode to specify how the alpha channel is used |
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Set the color for drawing or filling rectangles, lines, and points, and for SDL_RenderClear().
This function is available since SDL 3.0.0.
SDL_SetRenderDrawColor(renderer, 255, 0, 0, 255);
SDL_Rect rectangle;
rectangle.x = 0;
rectangle.y = 0;
rectangle.w = 50;
rectangle.h = 50;
SDL_RenderFillRect(renderer, &rectangle);