SDL: hello.c File Reference

SDL 3.0

#include <SDL3/SDL.h>
#include <SDL3/SDL_main.h>

Include dependency graph for hello.c:

Go to the source code of this file.

Macros
#define	SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */

Functions
SDL_AppResult	SDL_AppInit (void *appstate, int argc, char argv[])
SDL_AppResult	SDL_AppEvent (void appstate, SDL_Event event)
SDL_AppResult	SDL_AppIterate (void *appstate)
void	SDL_AppQuit (void *appstate, SDL_AppResult result)

Variables
static SDL_Window *	window = NULL
static SDL_Renderer *	renderer = NULL

Macro Definition Documentation

◆ SDL_MAIN_USE_CALLBACKS

#define SDL_MAIN_USE_CALLBACKS 1 /* use the callbacks instead of main() */

Definition at line 12 of file hello.c.

Function Documentation

◆ SDL_AppEvent()

SDL_AppResult SDL_AppEvent	(	void *	appstate,
		SDL_Event *	event )

Definition at line 31 of file hello.c.

{
    if (event->type == SDL_EVENT_KEY_DOWN ||
        event->type == SDL_EVENT_QUIT) {
        return SDL_APP_SUCCESS;  /* end the program, reporting success to the OS. */
    }
    return SDL_APP_CONTINUE;
}

References SDL_APP_CONTINUE, SDL_APP_SUCCESS, SDL_EVENT_KEY_DOWN, SDL_EVENT_QUIT, and SDL_Event::type.

◆ SDL_AppInit()

SDL_AppResult SDL_AppInit	(	void **	appstate,
		int	argc,
		char *	argv[] )

Definition at line 20 of file hello.c.

{
    /* Create the window */
    if (!SDL_CreateWindowAndRenderer("Hello World", 800, 600, SDL_WINDOW_FULLSCREEN, &window, &renderer)) {
        SDL_Log("Couldn't create window and renderer: %s", SDL_GetError());
        return SDL_APP_FAILURE;
    }
    return SDL_APP_CONTINUE;
}

References renderer, SDL_APP_CONTINUE, SDL_APP_FAILURE, SDL_CreateWindowAndRenderer(), SDL_GetError(), SDL_Log(), SDL_WINDOW_FULLSCREEN, and window.

◆ SDL_AppIterate()

SDL_AppResult SDL_AppIterate ( void * appstate )

Definition at line 41 of file hello.c.

{
    const char *message = "Hello World!";
    int w = 0, h = 0;
    float x, y;
    const float scale = 4.0f;
 
    /* Center the message and scale it up */
    SDL_GetRenderOutputSize(renderer, &w, &h);
    SDL_SetRenderScale(renderer, scale, scale);
    x = ((w / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE * SDL_strlen(message)) / 2;
    y = ((h / scale) - SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE) / 2;
 
    /* Draw the message */
    SDL_SetRenderDrawColor(renderer, 0, 0, 0, 255);
    SDL_RenderClear(renderer);
    SDL_SetRenderDrawColor(renderer, 255, 255, 255, 255);
    SDL_RenderDebugText(renderer, x, y, message);
    SDL_RenderPresent(renderer);
 
    return SDL_APP_CONTINUE;
}

References renderer, SDL_APP_CONTINUE, SDL_DEBUG_TEXT_FONT_CHARACTER_SIZE, SDL_GetRenderOutputSize(), SDL_RenderClear(), SDL_RenderDebugText(), SDL_RenderPresent(), SDL_SetRenderDrawColor(), SDL_SetRenderScale(), and SDL_strlen().

◆ SDL_AppQuit()

void SDL_AppQuit	(	void *	appstate,
		SDL_AppResult	result )

Definition at line 65 of file hello.c.

66{

67}

Variable Documentation

◆ renderer

SDL_Renderer* renderer = NULL

static

Definition at line 17 of file hello.c.

Referenced by SDL_AddVulkanRenderSemaphores(), SDL_AppInit(), SDL_AppIterate(), SDL_ConvertEventToRenderCoordinates(), SDL_CreateGPURenderState(), SDL_CreateTexture(), SDL_CreateTextureFromSurface(), SDL_CreateTextureWithProperties(), SDL_CreateWindowAndRenderer(), SDL_DestroyGPURenderState(), SDL_DestroyRenderer(), SDL_FlushRenderer(), SDL_GetCurrentRenderOutputSize(), SDL_GetDefaultTextureScaleMode(), SDL_GetGPURendererDevice(), SDL_GetRenderClipRect(), SDL_GetRenderColorScale(), SDL_GetRenderDrawBlendMode(), SDL_GetRenderDrawColor(), SDL_GetRenderDrawColorFloat(), SDL_GetRendererName(), SDL_GetRendererProperties(), SDL_GetRenderLogicalPresentation(), SDL_GetRenderLogicalPresentationRect(), SDL_GetRenderMetalCommandEncoder(), SDL_GetRenderMetalLayer(), SDL_GetRenderOutputSize(), SDL_GetRenderSafeArea(), SDL_GetRenderScale(), SDL_GetRenderTarget(), SDL_GetRenderTextureAddressMode(), SDL_GetRenderViewport(), SDL_GetRenderVSync(), SDL_GetRenderWindow(), SDL_RenderClear(), SDL_RenderClipEnabled(), SDL_RenderCoordinatesFromWindow(), SDL_RenderCoordinatesToWindow(), SDL_RenderDebugText(), SDL_RenderDebugTextFormat(), SDL_RenderFillRect(), SDL_RenderFillRects(), SDL_RenderGeometry(), SDL_RenderGeometryRaw(), SDL_RenderLine(), SDL_RenderLines(), SDL_RenderPoint(), SDL_RenderPoints(), SDL_RenderPresent(), SDL_RenderReadPixels(), SDL_RenderRect(), SDL_RenderRects(), SDL_RenderTexture(), SDL_RenderTexture9Grid(), SDL_RenderTexture9GridTiled(), SDL_RenderTextureAffine(), SDL_RenderTextureRotated(), SDL_RenderTextureTiled(), SDL_RenderViewportSet(), SDL_SetDefaultTextureScaleMode(), SDL_SetGPURenderState(), SDL_SetRenderClipRect(), SDL_SetRenderColorScale(), SDL_SetRenderDrawBlendMode(), SDL_SetRenderDrawColor(), SDL_SetRenderDrawColorFloat(), SDL_SetRenderLogicalPresentation(), SDL_SetRenderScale(), SDL_SetRenderTarget(), SDL_SetRenderTextureAddressMode(), SDL_SetRenderViewport(), SDL_SetRenderVSync(), SDLTest_CommonDrawWindowInfo(), SDLTest_DrawCharacter(), SDLTest_DrawString(), and SDLTest_TextWindowDisplay().

◆ window

SDL_Window* window = NULL

static

Definition at line 16 of file hello.c.

Referenced by SDL_AcquireGPUSwapchainTexture(), SDL_AppInit(), SDL_ClaimWindowForGPUDevice(), SDL_ClearComposition(), SDL_CreateGPURenderer(), SDL_CreateRenderer(), SDL_CreateWindowAndRenderer(), SDL_DestroyWindow(), SDL_DestroyWindowSurface(), SDL_EGL_GetWindowSurface(), SDL_FlashWindow(), SDL_GetDisplayForWindow(), SDL_GetGPUSwapchainTextureFormat(), SDL_GetRenderer(), SDL_GetTextInputArea(), SDL_GetWindowAspectRatio(), SDL_GetWindowBordersSize(), SDL_GetWindowDisplayScale(), SDL_GetWindowFlags(), SDL_GetWindowFullscreenMode(), SDL_GetWindowICCProfile(), SDL_GetWindowID(), SDL_GetWindowKeyboardGrab(), SDL_GetWindowMaximumSize(), SDL_GetWindowMinimumSize(), SDL_GetWindowMouseGrab(), SDL_GetWindowMouseRect(), SDL_GetWindowOpacity(), SDL_GetWindowParent(), SDL_GetWindowPixelDensity(), SDL_GetWindowPixelFormat(), SDL_GetWindowPosition(), SDL_GetWindowProgressState(), SDL_GetWindowProgressValue(), SDL_GetWindowProperties(), SDL_GetWindowRelativeMouseMode(), SDL_GetWindowSafeArea(), SDL_GetWindowSize(), SDL_GetWindowSizeInPixels(), SDL_GetWindowSurface(), SDL_GetWindowSurfaceVSync(), SDL_GetWindowTitle(), SDL_GL_CreateContext(), SDL_GL_MakeCurrent(), SDL_GL_SwapWindow(), SDL_HideWindow(), SDL_MaximizeWindow(), SDL_Metal_CreateView(), SDL_MinimizeWindow(), SDL_RaiseWindow(), SDL_ReleaseWindowFromGPUDevice(), SDL_RestoreWindow(), SDL_ScreenKeyboardShown(), SDL_SetGPUSwapchainParameters(), SDL_SetTextInputArea(), SDL_SetWindowAlwaysOnTop(), SDL_SetWindowAspectRatio(), SDL_SetWindowBordered(), SDL_SetWindowFillDocument(), SDL_SetWindowFocusable(), SDL_SetWindowFullscreen(), SDL_SetWindowFullscreenMode(), SDL_SetWindowHitTest(), SDL_SetWindowIcon(), SDL_SetWindowKeyboardGrab(), SDL_SetWindowMaximumSize(), SDL_SetWindowMinimumSize(), SDL_SetWindowModal(), SDL_SetWindowMouseGrab(), SDL_SetWindowMouseRect(), SDL_SetWindowOpacity(), SDL_SetWindowParent(), SDL_SetWindowPosition(), SDL_SetWindowProgressState(), SDL_SetWindowProgressValue(), SDL_SetWindowRelativeMouseMode(), SDL_SetWindowResizable(), SDL_SetWindowShape(), SDL_SetWindowSize(), SDL_SetWindowSurfaceVSync(), SDL_SetWindowTitle(), SDL_SetX11EventHook(), SDL_ShowOpenFileDialog(), SDL_ShowOpenFolderDialog(), SDL_ShowSaveFileDialog(), SDL_ShowSimpleMessageBox(), SDL_ShowWindow(), SDL_ShowWindowSystemMenu(), SDL_StartTextInput(), SDL_StartTextInputWithProperties(), SDL_StopTextInput(), SDL_SyncWindow(), SDL_TextInputActive(), SDL_UpdateWindowSurface(), SDL_UpdateWindowSurfaceRects(), SDL_Vulkan_CreateSurface(), SDL_WaitAndAcquireGPUSwapchainTexture(), SDL_WaitForGPUSwapchain(), SDL_WarpMouseInWindow(), SDL_WindowHasSurface(), SDL_WindowSupportsGPUPresentMode(), SDL_WindowSupportsGPUSwapchainComposition(), and SDLTest_CommonDrawWindowInfo().

hello.c
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