Function CanvasDrawRectA

NULLC/includes/canvas.cpp:307–326

		}
	}
	void CanvasDrawRectA(int x1, int y1, int x2, int y2, double alpha, Canvas* ptr)
	{
		if(!ptr)
		{
			nullcThrowError("ERROR: Canvas object is nullptr");
			return;
		}
		for(int x = x1 < 0 ? 0 : x1, xe = x2 > ptr->width ? ptr->width : x2; x < xe; x++)
		{
			for(int y = y1 < 0 ? 0 : y1, ye = y2 > ptr->height ? ptr->height : y2; y < ye; y++)
			{
				float *pixel = &((float*)ptr->data.ptr)[y * ptr->width * 4 + x * 4];

				pixel[0] = float(ptr->color[0] * alpha + pixel[0] * (1.0 - alpha));
				pixel[1] = float(ptr->color[1] * alpha + pixel[1] * (1.0 - alpha));
				pixel[2] = float(ptr->color[2] * alpha + pixel[2] * (1.0 - alpha));
				pixel[3] = 1.0f;
			}
		}
	}

	float saturate(float x){ if(x < 0.0) return 0.0; if(x > 255.0) return 255.0; return x; }