blit

问题 In the SDL wiki it says Use this function to perform a fast blit from the source surface to the destination surface. However that doesn't help me much. What does the term surface blitting mean in this context? 回答1: Basically it means copying the image from one surface to another -- possibly cropped and shifted. 回答2: Blitting means bit-boundary block transfer as defined by Wikipedia or Block Information Transfer , well known among the Pygame developers. Assume you have a Surface(your screen).

问题 I'm making a game and I need to blit my objects inside the area of a specific image. I don't want to need my surface to blit these images. Is it possible? (I'm using pygame) 回答1: It would be better in the future if you would explain what you are trying to do a bit better since it would give you more answers :) From what I have understood you want to blit an image onto another image: For this code to work the following premises are set: The folder which contains the program also contains the

问题 i am having trouble with the following: I need to render a texture on top of another texture and then render that main texture. For example I have the blue rectangle texture, and I want to draw red rectangles on top of this blue rect. However i want them to restrict the render only on this rectangle. Like the following image: I read something about texture blit between them or something like that but im not sure if this is posible. My code looks like this: SDL_RenderCopy(ren,bluetexture,NULL

问题 I'm making a game with pygame and each Sprite has a rectangle and an image. How would I blit this image to a surface so that it's the same size as the rectangle? pygame.init() screen = pygame.display.set_mode((720, 480)) pygame.display.set_caption('My game') background = pygame.Surface(screen.get_size()) background = background.convert() background.fill((250, 250, 250)) charRect = pygame.Rect((0,0),(10, 10)) print os.path.abspath("airbender.png") charImage = pygame.image.load(os.path.abspath(

问题 Heys, I recently couldnt figure out how to blit lists onto my pygame screen using certain x and y values, allowing the text to blit say x += 20, moving every other string in my list over 20 units everytime it blits. I recently did some .format stuff with printing just in the console, is there a feature like this for screen.blit so I can use the same formatting in a pygame window? Included my code underneath. Thanks in advance :D import pygame NAMES = ['Deanerys T.', 'Jon S.', 'Gregor C.',

问题 I am writing a "High Scores" table window for my pygame. Currently I am unpickling a file and then breaking the tuples apart so I can display the player name on the left and the score on the right. However in the current configuration, all of the player names are stacked ontop of eachother and the same with the scores. I need to figure out how to display each new player name and score combo on a new line. I'm still pretty new to python (working with version 3), any help would be greatly

问题 What is the cleanest way of blitting a texture to the HTML canvas in WebGL. I could see setting up an orthographic projection and rendering a textured quad, but is there a cleaner way? 回答1: What to mean "blitting a texture to the HTML5 Canvas"? Do you mean just drawing a texture 1x1 pixel to the canvas? No need for a orthographic projection. The simplest thing is either make a unit quad and scale or make a quad in pixel coords and draw. Here's the pixel coord quad shader attribute vec2 a

问题 I have two 2D textures. The first, an MSAA texture, uses a target of GL_TEXTURE_2D_MULTISAMPLE . The second, non MSAA texture, uses a target of GL_TEXTURE_2D . According to OpenGL's spec on ARB_texture_multisample, only GL_NEAREST is a valid filtering option when the MSAA texture is being drawn to. In this case, both of these textures are attached to GL_COLOR_ATTACHMENT0 via their individual Framebuffer objects. Their resolutions are also the same size (to my knowledge this is necessary when

问题 I use matplotlib to animate a plot, by copying the background and blitting: f = Figure(tight_layout=True) canvas = FigureCanvasTkAgg(f, master=pframe) canvas.get_tk_widget().pack() ax = f.add_subplot(111) # Set inial plot title title = ax.set_title("First title") canvas.show() # Capture the background of the figure background = canvas.copy_from_bbox(ax.bbox) line, = ax.plot(x, y) canvas._tkcanvas.pack() Periodically I update the plot: # How to update the title here? line.set_ydata(new_data)

问题 Is there any way to clear a surface from anything that has been blitted to it? 回答1: When I dont care about performance, I use: mysurface.fill((0,0,0)) Which will draw the specified color (black in this case) across the entire surface. Is that what you meant by "clear"? Oh, and you need, of course, to "flip" the surface after doing this for it to be visible on the screen. 回答2: I don't know what API you're using, so here's a vague answer: In virtually all cases "clearing" a surface simply blits