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| ||'''a'''||the alpha value used to draw on the rendering target; usually SDL_ALPHA_OPAQUE (255). Use [[SDL_SetDrawBlendMode]] to specify how the alpha channel is used|| | ||'''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|| |
SDL_SetRenderDrawColor
Use this function to set the color used for drawing operations (Rect, Line and Clear).
Contents
Syntax
int SDL_SetRenderDrawColor(SDL_Renderer* renderer,
Uint8 r,
Uint8 g,
Uint8 b,
Uint8 a)
Function Parameters
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 |
Return Value
Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.
Code Examples
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);
Remarks
Use this function to set the color for drawing or filling rectangles, lines, and points, and for SDL_RenderClear().
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