Sdl get surface dimensions. g, given SDL_Surface *s, you can read s->w or s->h).

Sdl get surface dimensions . This argument can be NULL if you don't need this information. The Simple Directmedia Layer WikiSDL_ScaleSurface Creates a new surface identical to the existing surface, scaled to the desired size. The Simple Directmedia Layer Wiki(See SDL3/SDL_GetWindowSurface for the SDL3 version. Aug 13, 2015 · How can I get the resolution of window without taking border into account in SDL2? I need the function just like GetClientRect in WinAPI, but it seems like there is no equal function in SDL2. h> Syntax SDL Simple Directmedia Layer Forums sdl surface dimensions jyoti Guest Posted: Thu May 21, 2009 6:16 am Hi Is there any way by which I can change the dimensions of an sdl surface which is put on some other bigger sdl surface?Can I get the properties of an sdl surface Jan 1, 2014 · Last Updated 1/1/14 Now that you got an image on the screen in part 2 of the last tutorial, it's time do your surface loading and blitting in a more efficient way. pixels is a pointer to the actual pixel data, the surface should be locked before accessing this Lock surface for raw access to pixel. The Simple Directmedia Layer WikiSDL_GetWindowSurface Get the SDL surface associated with the window. Header File Defined in <SDL3/SDL_video. g. The pitch is basically the width of the texture in The window size in screen coordinates may differ from the size in pixels, if the window was created with SDL_WINDOW_ALLOW_HIGHDPI on a platform with high-dpi support (e. h a pointer filled in with the The code you have pasted does the following things: Creates a SDL window called "Window name", sets its horizontal and vertical positions to center, sets the window size to 640 x 480 and marks it as shown. Covers loading, rendering, positioning, and resource management. SDL_GetTextureSize - Man Page Get the size of a texture, as floating point values. h Syntax SDL_Surface* SDL_CreateRGBSurface (Uint32 flags, int width, int height, int depth, Uint32 Rmask, Uint32 Gmask, Uint32 Bmask, Uint32 Amask); Nov 4, 2015 · We use SDL_CreateRenderer () to get an instance of SDL_Renderer. We want to be able to manipulate a surface's pixels before turning it into a texture, so we separate function loadPixelsFromFile () to load the pixels and then loadFromPixels () to turn the texture into pixels. As you alter the window's size, the outputted window dimensions change as expected - but the surface dimensions remain SDL Simple Directmedia Layer Forums calculating the size of an sdl_surface SDL Simple Directmedia Layer Forums sdl surface dimensions jyoti Guest Posted: Thu May 21, 2009 6:16 am Hi Is there any way by which I can change the dimensions of an sdl surface which is put on some other bigger sdl surface?Can I get the properties of an sdl surface UPDATED FOR C++23 | Learn to resize and scale images in your C++ SDL game using Fill, Contain, & Cover modes, similar to CSS | Clear explanations and simple code examples jyoti 2009-05-21 06:16:06 UTC Hi Is there any way by which I can change the dimensions of an sdl surface which is put on some other bigger sdl surface?Can I get the properties of an sdl surface Jun 7, 2025 · Like with SDL_CreateWindow, SDL_LoadBMP returns NULL on an error so when we get a NULL surface back, we report and error to the console and set the success flag to error. You don't need a function for this. To finish, update your own camera with the new window width and height. Way 3: Directly from Image File 3) You create a SDL_Texture from and image file directly. References size (), and window_. I hope to copy RGBA data from "SDL_Surface->pixels", but I am not sure whether "pixels" is RGBA array, and what's "pixels" size. */ SDL_LockSurface(surface); /* This assumes that color value zero is black. Jan 12, 2024 · SDL_DestroyWindow(mainWindow); mainWindow = NULL; SDL_Quit(); return 0; } As you can see, while you resize the window, it prints the window dimensions to the console, along with the surface dimensions (of the window surface). Return a lock object that permit to access the pixels. c', line 2213 static VALUE Surface_pixels (VALUE self) { SDL_Surface* surface = Get_SDL_Surface (self); int size = surface->h * surface->pitch; return rb_str_new (surface->pixels, size); } SDL_CreateRGBSurface Allocate a new RGB surface. If no size is passed or is set to (0, 0) and pygame uses SDL version 1. 0 Description SDL_Surface 's represent areas of "graphical" memory, memory that can be drawn to. Texture Manipulation tutorial with SDL 2 is now available. The first is the window where we are drawing. uk Parallel Realities games Aug 3, 2013 · Simple Directmedia Layer Forums resize To resize the swapchain, we first begin by waiting until the GPU has finished all rendering commands. h> Syntax Simple DirectMedia Layer. References sdl::Surface::Lock::surface_. Description SDL_Surface 's represent areas of "graphical" memory, memory that can be drawn to. Definition at line 392 of file window. h> Syntax SDL_Surface * SDL_CreateSurfaceFrom(int width, int height, SDL_PixelFormat format, void *pixels, int pitch); Use SDL_CreateTextureFromSurface to make it a texture, and by using SDL_RenderCopy, you can specify the exact dimensions you want your image to fill and it will scale it for you. The window pixel size may differ from its window coordinate size if the window is on a high pixel density display. The width and height of a surface can be read directly from the structure members w and h (e. The second line acquires the SDL surface bind to this window. w := sdl_surface. The Simple Directmedia Layer WikiSDL_CreateSurface Allocate a new surface with a specific pixel format. . Apr 6, 2016 · SDL uses letterboxing for the scaling, however, so it will always keep everything in view. Time SDL_GetTicks — Get the number of milliseconds since the SDL library initialization. While this might not be the optimal scaling method specifically for user interfaces, it is a quick and fast way to get your game resolution independent. h> Syntax May 8, 2014 · To get the best video mode call SDL_GetVideoInfo before setting up the video (before calling SDL_SetVideoMode). We dont want to change the images and views while the gpu is still handling them. png file, and then draws geometry (arbitrary polygons) using it. We have a function to get the raw pixels and a function to get the pitch. iOS or macOS). Then we destroy the swapchain, and then we query the window size from SDL and create it again. Thank you:D Pedro Henrique Antunes de Oliveira 2015-06-10 02:56:34 UTC Creating a Texture As mentioned in the last lesson, textures are the GPU rendering equivalent of surfaces. 0 You can use the SDL_BlitScaled() function to scale a surface into a targeted SDL_Rect. How can I get screen's width and height in pixels in SDL?I'm trying to get screen's width not the window's width. w would work but I cannot get the value of the width this way. h> bool SDL_GetTextureSize(SDL_Texture *texture, float *w, float *h); Function Parameters texture the texture to query. h> Syntax The bit I'm struggling with is how do I get the width and height of an SDL Surface? I originally thought that sdl_rectangle. Contribute to libsdl-org/SDL development by creating an account on GitHub. May not match window size on platform that uses display scaling. In the switch, use the flag SDL_WINDOWEVENT_RESIZED if you want only the final size of the window or SDL_WINDOWEVENT_SIZE_CHANGED if you want all the sizes between the first and the final. The second allows us to select This example creates an SDL window and renderer, loads a texture from a . This function more or less does what you'd expect—the parameters are the rendering context and a surface to create the texture from. This way is shown in the diagram but it means two steps. An Optimized Surface Loading and Blitting tutorial with SDL 2 is now available. w and h are the width and height of the surface in pixels. h Syntax Description SDL_Surface 's represent areas of "graphical" memory, memory that can be drawn to. | Clear explanations and simple code examples This example creates an SDL window and renderer, then a streaming texture that it will update every frame before drawing it to the screen. This is shown in the diagram, too. Mar 28, 2010 · Last Updated 3/28/10 SDL has no built in functions to flip surfaces. g, given SDL_Surface *s, you can read s->w or s->h). Version This function is available since SDL 3. SDL_RemoveTimer — Remove a timer which was added with SDL_AddTimer. hpp. You can query the window pixel size using SDL_GetWindowSizeInPixels(), and when this changes you get an SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED event. The depth argument represents the number of bits to use for color. May 25, 2024 · An SDL surface is just an image data type that contains the pixels of an image along with all data needed to render it. h> Syntax UPDATED FOR C++23 | Learn SDL2 window management: resizing, constraints, and dynamic updates. What this means is: Create Window , actually sets up and openGL window and a GPU texture (the Surface, althou SDL2 has seperate The Simple Directmedia Layer WikiSDL_GetTextureSize Get the size of a texture, as floating point values. Use SDL_GL_GetDrawableSize (), SDL_Vulkan_GetDrawableSize (), or SDL_GetRendererOutputSize () to get the real client area size in pixels. As with other creation functions, it will UPDATED FOR C++23 | Step-by-step guide to positioning and rendering in C++ for your SDL2 ECS. co. The Surface that gets returned can be drawn to like a regular Surface but changes will eventually be seen on the monitor. UPDATED FOR C++23 | C++ SDL2 techniques for image positioning and scaling. 10 or above, the created Surface will have the same size as the current screen The window pixel size may differ from its window coordinate size if the window is on a high pixel density display. When lock goes out of scope, resources goes unlocked automatically Definition at line 312 of file surface. SDL_AddTimer — Add a timer which will call a callback after the specified number of milliseconds has elapsed. Header File Defined in SDL_video. SDL_CreateSurfaceFrom Allocate a new surface with a specific pixel format and existing pixel data. Learn to use SDL_BlitScaled() and prevent stretching. Scaling Modes: High Pixel Density Mode (SDL_WINDOW_HIGH_PIXEL_DENSITY): Backbuffer size = logical size × scale factor Uses wp_viewport for fractional scales, wl_surface_set_buffer_scale for integer Pointer coordinates scaled automatically Scale-to-Display Mode (scale_to_display = true): Window size in pixels, not logical units Backbuffer matches requested pixel size Used for DPI-unaware Furthermore I thought about using a SDL surface for this task creating them from the original images but due to the fact that the shapes are being rotated through the texture that wouldn't work. But you still have to initialize the video subsystem before calling it (SDL_Init(SDL_INIT_VIDEO)). Mar 25, 2018 · # File 'video. Jun 22, 2015 · In SDL 2. h Syntax The Simple Directmedia Layer WikiSDL_Surface A collection of pixels used in software blitting. | Clear explanations and simple code examples May 28, 2024 · Here we're adding new functionality to the texture class. The Simple Directmedia Layer WikiSDL_Surface A collection of pixels used in software blitting. Header File Defined in SDL_surface. png file, and then draws it a few times each frame. The reason we need to do this is on This example creates an SDL window and renderer, loads a texture from a . 2. There's a tutorial by LazyFoo which describes this, or check out this documentation. Most of the fields should be pretty obvious. The video framebuffer is returned as a SDL_Surface by SDL_SetVideoMode and SDL_GetVideoSurface. The Simple Directmedia Layer Wiki(See SDL3/SDL_Surface for the SDL3 version. Synopsis #include <SDL3/SDL_render. Use SDL_MapRGBA() for more robust surface color mapping! */ /* height times pitch is the size of the surface's whole buffer. Header File Defined in <SDL3/SDL_surface. Feb 15, 2015 · Re: resize window SDL2resize window SDL2 13. pixels is a pointer to the actual pixel data, the surface should be locked before accessing this Nov 29, 2016 · We want to create an SDL surface by loading an image with SDL_Image and if the dimensions exceed a limit resize the surface. ) SDL_GetWindowSurface Get the SDL surface associated with the window. So we'll just have to flip surfaces ourselves by playing with the pixels. SDL_Delay — Wait a specified number of milliseconds before returning. | Clear explanations and simple code examples SDL_GetVideoSurface -- returns a pointer to the current display surface SDL_GetVideoInfo -- returns a pointer to information about the video hardware SDL_VideoDriverName -- Obtain the name of the video driver SDL_ListModes -- Returns a pointer to an array of available screen dimensions for the given format and video flags Oct 3, 2025 · SDL2 - Working with TTF fonts - parallelrealities. w a pointer filled in with the width of the texture in pixels. In this tutorial we will read/write pixels to make our own surface flipping function. h> Syntax Aug 7, 2018 · Way 2: From SDL2 Surface 2) You have or create a SDL_Surface from an image file first and then you create the SDL_Texture from the SDL_Surface. Version How to get SDL_Surface->pixels size?How to get SDL_Surface->pixels size? SDL :: View topic - How do I get dimensions of a surfaces? How do I get dimensions of a surfaces? Jun 7, 2025 · Because SDL_FRect is made of floating point types, we want to static cast the image dimensions (which are integers) to float types to get rid of any warnings and because you want to make sure to be explicit with your type conversions. Feb 27, 2025 · In this chapter some basics of graphics programming are presented and the concepts of SDL3 surfaces and SDL3 textures are introduced. Hence, textures are almost always created from surfaces, using the function SDL_CreateTextureFromSurface (). Use SDL_GetWindowSizeInPixels () or SDL_GetRenderOutputSize () to get the real client area size in pixels. Oct 28, 2015 · I'm trying to make a program using SDL and C++. Thread Safety This function should only be called on the main thread. SDL surfaces use software rendering which means it uses the CPU to render. Header File Defined in <SDL3/SDL_render. gl_get_drawable_size () Get the actual size of the OpenGL drawing area on the window. You are guaranteed to get a SDL_EVENT_WINDOW_PIXEL_SIZE_CHANGED event when a window is created and resized, and you can use this event to create and resize your graphics context for the window. This renderer represents the output device (usually your graphics card) to which your code will be drawing. ) SDL_Surface A collection of pixels used in software blitting. In fact it’s the final destination of our image, because we’ll be following the steps below: SDL_CreateRenderer () takes three parameters. ckpsvld wyyyb okn tviord betxl lpsufj cdze uquuvsqc goypncx pybygx uxhjohw vgel iysiob prsx vzub