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SDL_render.h
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SDL_render.h
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/*
Simple DirectMedia Layer
Copyright (C) 1997-2023 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
/**
* \file SDL_render.h
*
* Header file for SDL 2D rendering functions.
*
* This API supports the following features:
* * single pixel points
* * single pixel lines
* * filled rectangles
* * texture images
*
* The primitives may be drawn in opaque, blended, or additive modes.
*
* The texture images may be drawn in opaque, blended, or additive modes.
* They can have an additional color tint or alpha modulation applied to
* them, and may also be stretched with linear interpolation.
*
* This API is designed to accelerate simple 2D operations. You may
* want more functionality such as polygons and particle effects and
* in that case you should use SDL's OpenGL/Direct3D support or one
* of the many good 3D engines.
*
* These functions must be called from the main thread.
* See this bug for details: https://github.com/libsdl-org/SDL/issues/986
*/
#ifndef SDL_render_h_
#define SDL_render_h_
#include <SDL3/SDL_stdinc.h>
#include <SDL3/SDL_events.h>
#include <SDL3/SDL_properties.h>
#include <SDL3/SDL_rect.h>
#include <SDL3/SDL_video.h>
#include <SDL3/SDL_begin_code.h>
/* Set up for C function definitions, even when using C++ */
#ifdef __cplusplus
extern "C" {
#endif
/**
* Flags used when creating a rendering context
*/
typedef enum
{
SDL_RENDERER_SOFTWARE = 0x00000001, /**< The renderer is a software fallback */
SDL_RENDERER_ACCELERATED = 0x00000002, /**< The renderer uses hardware
acceleration */
SDL_RENDERER_PRESENTVSYNC = 0x00000004 /**< Present is synchronized
with the refresh rate */
} SDL_RendererFlags;
/**
* Information on the capabilities of a render driver or context.
*/
typedef struct SDL_RendererInfo
{
const char *name; /**< The name of the renderer */
Uint32 flags; /**< Supported ::SDL_RendererFlags */
Uint32 num_texture_formats; /**< The number of available texture formats */
Uint32 texture_formats[16]; /**< The available texture formats */
int max_texture_width; /**< The maximum texture width */
int max_texture_height; /**< The maximum texture height */
} SDL_RendererInfo;
/**
* Vertex structure
*/
typedef struct SDL_Vertex
{
SDL_FPoint position; /**< Vertex position, in SDL_Renderer coordinates */
SDL_Color color; /**< Vertex color */
SDL_FPoint tex_coord; /**< Normalized texture coordinates, if needed */
} SDL_Vertex;
/**
* The scaling mode for a texture.
*/
typedef enum
{
SDL_SCALEMODE_NEAREST, /**< nearest pixel sampling */
SDL_SCALEMODE_LINEAR, /**< linear filtering */
SDL_SCALEMODE_BEST /**< anisotropic filtering */
} SDL_ScaleMode;
/**
* The access pattern allowed for a texture.
*/
typedef enum
{
SDL_TEXTUREACCESS_STATIC, /**< Changes rarely, not lockable */
SDL_TEXTUREACCESS_STREAMING, /**< Changes frequently, lockable */
SDL_TEXTUREACCESS_TARGET /**< Texture can be used as a render target */
} SDL_TextureAccess;
/**
* Flip constants for SDL_RenderTextureRotated
*/
typedef enum
{
SDL_FLIP_NONE = 0x00000000, /**< Do not flip */
SDL_FLIP_HORIZONTAL = 0x00000001, /**< flip horizontally */
SDL_FLIP_VERTICAL = 0x00000002 /**< flip vertically */
} SDL_RendererFlip;
/**
* How the logical size is mapped to the output
*/
typedef enum
{
SDL_LOGICAL_PRESENTATION_DISABLED, /**< There is no logical size in effect */
SDL_LOGICAL_PRESENTATION_STRETCH, /**< The rendered content is stretched to the output resolution */
SDL_LOGICAL_PRESENTATION_LETTERBOX, /**< The rendered content is fit to the largest dimension and the other dimension is letterboxed with black bars */
SDL_LOGICAL_PRESENTATION_OVERSCAN, /**< The rendered content is fit to the smallest dimension and the other dimension extends beyond the output bounds */
SDL_LOGICAL_PRESENTATION_INTEGER_SCALE /**< The rendered content is scaled up by integer multiples to fit the output resolution */
} SDL_RendererLogicalPresentation;
/**
* A structure representing rendering state
*/
struct SDL_Renderer;
typedef struct SDL_Renderer SDL_Renderer;
/**
* An efficient driver-specific representation of pixel data
*/
struct SDL_Texture;
typedef struct SDL_Texture SDL_Texture;
/* Function prototypes */
/**
* Get the number of 2D rendering drivers available for the current display.
*
* A render driver is a set of code that handles rendering and texture
* management on a particular display. Normally there is only one, but some
* drivers may have several available with different capabilities.
*
* There may be none if SDL was compiled without render support.
*
* \returns a number >= 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateRenderer
* \sa SDL_GetRenderDriver
*/
extern DECLSPEC int SDLCALL SDL_GetNumRenderDrivers(void);
/**
* Use this function to get the name of a built in 2D rendering driver.
*
* The list of rendering drivers is given in the order that they are normally
* initialized by default; the drivers that seem more reasonable to choose
* first (as far as the SDL developers believe) are earlier in the list.
*
* The names of drivers are all simple, low-ASCII identifiers, like "opengl",
* "direct3d12" or "metal". These never have Unicode characters, and are not
* meant to be proper names.
*
* The returned value points to a static, read-only string; do not modify or
* free it!
*
* \param index the index of the rendering driver; the value ranges from 0 to
* SDL_GetNumRenderDrivers() - 1
* \returns the name of the rendering driver at the requested index, or NULL
* if an invalid index was specified.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetNumRenderDrivers
*/
extern DECLSPEC const char *SDLCALL SDL_GetRenderDriver(int index);
/**
* Create a window and default renderer.
*
* \param width the width of the window
* \param height the height of the window
* \param window_flags the flags used to create the window (see
* SDL_CreateWindow())
* \param window a pointer filled with the window, or NULL on error
* \param renderer a pointer filled with the renderer, or NULL on error
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateRenderer
* \sa SDL_CreateWindow
*/
extern DECLSPEC int SDLCALL SDL_CreateWindowAndRenderer(int width, int height, Uint32 window_flags, SDL_Window **window, SDL_Renderer **renderer);
/**
* Create a 2D rendering context for a window.
*
* If you want a specific renderer, you can specify its name here. A list of
* available renderers can be obtained by calling SDL_GetRenderDriver multiple
* times, with indices from 0 to SDL_GetNumRenderDrivers()-1. If you don't
* need a specific renderer, specify NULL and SDL will attempt to choose the
* best option for you, based on what is available on the user's system.
*
* By default the rendering size matches the window size in pixels, but you
* can call SDL_SetRenderLogicalPresentation() to change the content size and
* scaling options.
*
* \param window the window where rendering is displayed
* \param name the name of the rendering driver to initialize, or NULL to
* initialize the first one supporting the requested flags
* \param flags 0, or one or more SDL_RendererFlags OR'd together
* \returns a valid rendering context or NULL if there was an error; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateRendererWithProperties
* \sa SDL_CreateSoftwareRenderer
* \sa SDL_DestroyRenderer
* \sa SDL_GetNumRenderDrivers
* \sa SDL_GetRenderDriver
* \sa SDL_GetRendererInfo
*/
extern DECLSPEC SDL_Renderer * SDLCALL SDL_CreateRenderer(SDL_Window *window, const char *name, Uint32 flags);
/**
* Create a 2D rendering context for a window, with the specified properties.
*
* These are the supported properties:
*
* - "window" (pointer) - the window where rendering is displayed
* - "surface" (pointer) - the surface where rendering is displayed, if you want a software renderer without a window
* - "name" (string) - the name of the rendering driver to use, if a specific one is desired
* - "present_vsync" (boolean) - true if you want present synchronized with the refresh rate
*
* \param props the properties to use
* \returns a valid rendering context or NULL if there was an error; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateRenderer
* \sa SDL_CreateSoftwareRenderer
* \sa SDL_DestroyRenderer
* \sa SDL_GetRendererInfo
*/
extern DECLSPEC SDL_Renderer * SDLCALL SDL_CreateRendererWithProperties(SDL_PropertiesID props);
/**
* Create a 2D software rendering context for a surface.
*
* Two other API which can be used to create SDL_Renderer:
* SDL_CreateRenderer() and SDL_CreateWindowAndRenderer(). These can _also_
* create a software renderer, but they are intended to be used with an
* SDL_Window as the final destination and not an SDL_Surface.
*
* \param surface the SDL_Surface structure representing the surface where
* rendering is done
* \returns a valid rendering context or NULL if there was an error; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateRenderer
* \sa SDL_CreateWindowRenderer
* \sa SDL_DestroyRenderer
*/
extern DECLSPEC SDL_Renderer *SDLCALL SDL_CreateSoftwareRenderer(SDL_Surface *surface);
/**
* Get the renderer associated with a window.
*
* \param window the window to query
* \returns the rendering context on success or NULL on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateRenderer
*/
extern DECLSPEC SDL_Renderer *SDLCALL SDL_GetRenderer(SDL_Window *window);
/**
* Get the window associated with a renderer.
*
* \param renderer the renderer to query
* \returns the window on success or NULL on failure; call SDL_GetError() for
* more information.
*
* \since This function is available since SDL 3.0.0.
*/
extern DECLSPEC SDL_Window *SDLCALL SDL_GetRenderWindow(SDL_Renderer *renderer);
/**
* Get information about a rendering context.
*
* \param renderer the rendering context
* \param info an SDL_RendererInfo structure filled with information about the
* current renderer
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateRenderer
*/
extern DECLSPEC int SDLCALL SDL_GetRendererInfo(SDL_Renderer *renderer, SDL_RendererInfo *info);
/**
* Get the properties associated with a renderer.
*
* The following read-only properties are provided by SDL:
*
* ```
* "SDL.renderer.d3d9.device" (pointer) - the IDirect3DDevice9 associated with the renderer
* "SDL.renderer.d3d11.device" (pointer) - the ID3D11Device associated with the renderer
* "SDL.renderer.d3d12.device" (pointer) - the ID3D12Device associated with the renderer
* "SDL.renderer.d3d12.command_queue" (pointer) - the ID3D12CommandQueue associated with the renderer
* ```
*
* \param renderer the rendering context
* \returns a valid property ID on success or 0 on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetProperty
* \sa SDL_SetProperty
*/
extern DECLSPEC SDL_PropertiesID SDLCALL SDL_GetRendererProperties(SDL_Renderer *renderer);
/**
* Get the output size in pixels of a rendering context.
*
* This returns the true output size in pixels, ignoring any render targets or
* logical size and presentation.
*
* \param renderer the rendering context
* \param w a pointer filled in with the width in pixels
* \param h a pointer filled in with the height in pixels
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetRenderer
*/
extern DECLSPEC int SDLCALL SDL_GetRenderOutputSize(SDL_Renderer *renderer, int *w, int *h);
/**
* Get the current output size in pixels of a rendering context.
*
* If a rendering target is active, this will return the size of the rendering
* target in pixels, otherwise if a logical size is set, it will return the
* logical size, otherwise it will return the value of
* SDL_GetRenderOutputSize().
*
* \param renderer the rendering context
* \param w a pointer filled in with the current width
* \param h a pointer filled in with the current height
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetRenderOutputSize
* \sa SDL_GetRenderer
*/
extern DECLSPEC int SDLCALL SDL_GetCurrentRenderOutputSize(SDL_Renderer *renderer, int *w, int *h);
/**
* Create a texture for a rendering context.
*
* You can set the texture scaling method by setting
* `SDL_HINT_RENDER_SCALE_QUALITY` before creating the texture.
*
* \param renderer the rendering context
* \param format one of the enumerated values in SDL_PixelFormatEnum
* \param access one of the enumerated values in SDL_TextureAccess
* \param w the width of the texture in pixels
* \param h the height of the texture in pixels
* \returns a pointer to the created texture or NULL if no rendering context
* was active, the format was unsupported, or the width or height
* were out of range; call SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateTextureFromSurface
* \sa SDL_CreateTextureWithProperties
* \sa SDL_DestroyTexture
* \sa SDL_QueryTexture
* \sa SDL_UpdateTexture
*/
extern DECLSPEC SDL_Texture *SDLCALL SDL_CreateTexture(SDL_Renderer *renderer, Uint32 format, int access, int w, int h);
/**
* Create a texture from an existing surface.
*
* The surface is not modified or freed by this function.
*
* The SDL_TextureAccess hint for the created texture is
* `SDL_TEXTUREACCESS_STATIC`.
*
* The pixel format of the created texture may be different from the pixel
* format of the surface. Use SDL_QueryTexture() to query the pixel format of
* the texture.
*
* \param renderer the rendering context
* \param surface the SDL_Surface structure containing pixel data used to fill
* the texture
* \returns the created texture or NULL on failure; call SDL_GetError() for
* more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateTexture
* \sa SDL_CreateTextureWithProperties
* \sa SDL_DestroyTexture
* \sa SDL_QueryTexture
*/
extern DECLSPEC SDL_Texture *SDLCALL SDL_CreateTextureFromSurface(SDL_Renderer *renderer, SDL_Surface *surface);
/**
* Create a texture for a rendering context with the specified properties.
*
* These are the supported properties:
*
* - "format" (number) - one of the enumerated values in SDL_PixelFormatEnum, defaults to the best RGBA format for the renderer
* - "access" (number) - one of the enumerated values in SDL_TextureAccess, defaults to SDL_TEXTUREACCESS_STATIC
* - "width" (number) - the width of the texture in pixels, required
* - "height" (number) - the height of the texture in pixels, required
*
* With the direct3d11 renderer:
*
* - "d3d11.texture" (pointer) - the ID3D11Texture2D associated with the texture, if you want to wrap an existing texture.
* - "d3d11.texture_u" (pointer) - the ID3D11Texture2D associated with the U plane of a YUV texture, if you want to wrap an existing texture.
* - "d3d11.texture_v" (pointer) - the ID3D11Texture2D associated with the V plane of a YUV texture, if you want to wrap an existing texture.
*
* With the direct3d12 renderer:
*
* - "d3d12.texture" (pointer) - the ID3D12Resource associated with the texture, if you want to wrap an existing texture.
* - "d3d12.texture_u" (pointer) - the ID3D12Resource associated with the U plane of a YUV texture, if you want to wrap an existing texture.
* - "d3d12.texture_v" (pointer) - the ID3D12Resource associated with the V plane of a YUV texture, if you want to wrap an existing texture.
*
* With the opengl renderer:
*
* - "opengl.texture" (number) - the GLuint texture associated with the texture, if you want to wrap an existing texture.
* - "opengl.texture_uv" (number) - the GLuint texture associated with the UV plane of an NV12 texture, if you want to wrap an existing texture.
* - "opengl.texture_u" (number) - the GLuint texture associated with the U plane of a YUV texture, if you want to wrap an existing texture.
* - "opengl.texture_v" (number) - the GLuint texture associated with the V plane of a YUV texture, if you want to wrap an existing texture.
*
* With the opengles2 renderer:
*
* - "opengles2.texture" (number) - the GLuint texture associated with the texture, if you want to wrap an existing texture.
* - "opengles2.texture_uv" (number) - the GLuint texture associated with the UV plane of an NV12 texture, if you want to wrap an existing texture.
* - "opengles2.texture_u" (number) - the GLuint texture associated with the U plane of a YUV texture, if you want to wrap an existing texture.
* - "opengles2.texture_v" (number) - the GLuint texture associated with the V plane of a YUV texture, if you want to wrap an existing texture.
*
* \param renderer the rendering context
* \param props the properties to use
* \returns a pointer to the created texture or NULL if no rendering context
* was active, the format was unsupported, or the width or height
* were out of range; call SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateTextureFromSurface
* \sa SDL_CreateTexture
* \sa SDL_DestroyTexture
* \sa SDL_QueryTexture
* \sa SDL_UpdateTexture
*/
extern DECLSPEC SDL_Texture *SDLCALL SDL_CreateTextureWithProperties(SDL_Renderer *renderer, SDL_PropertiesID props);
/**
* Get the properties associated with a texture.
*
* The following read-only properties are provided by SDL:
*
* With the direct3d11 renderer:
*
* - "SDL.texture.d3d11.texture" (pointer) - the ID3D11Texture2D associated with the texture
* - "SDL.texture.d3d11.texture_u" (pointer) - the ID3D11Texture2D associated with the U plane of a YUV texture
* - "SDL.texture.d3d11.texture_v" (pointer) - the ID3D11Texture2D associated with the V plane of a YUV texture
*
* With the direct3d12 renderer:
*
* - "SDL.texture.d3d12.texture" (pointer) - the ID3D12Resource associated with the texture
* - "SDL.texture.d3d12.texture_u" (pointer) - the ID3D12Resource associated with the U plane of a YUV texture
* - "SDL.texture.d3d12.texture_v" (pointer) - the ID3D12Resource associated with the V plane of a YUV texture
*
* With the opengl renderer:
*
* - "SDL.texture.opengl.texture" (number) - the GLuint texture associated with the texture
* - "SDL.texture.opengl.texture_uv" (number) - the GLuint texture associated with the UV plane of an NV12 texture
* - "SDL.texture.opengl.texture_u" (number) - the GLuint texture associated with the U plane of a YUV texture
* - "SDL.texture.opengl.texture_v" (number) - the GLuint texture associated with the V plane of a YUV texture
* - "SDL.texture.opengl.tex_w" (float) - the texture coordinate width of the texture (0.0 - 1.0)
* - "SDL.texture.opengl.tex_h" (float) - the texture coordinate height of the texture (0.0 - 1.0)
*
* With the opengles2 renderer:
*
* - "SDL.texture.opengles2.texture" (number) - the GLuint texture associated with the texture
* - "SDL.texture.opengles2.texture_uv" (number) - the GLuint texture associated with the UV plane of an NV12 texture
* - "SDL.texture.opengles2.texture_u" (number) - the GLuint texture associated with the U plane of a YUV texture
* - "SDL.texture.opengles2.texture_v" (number) - the GLuint texture associated with the V plane of a YUV texture
*
* \param texture the texture to query
* \returns a valid property ID on success or 0 on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetProperty
* \sa SDL_SetProperty
*/
extern DECLSPEC SDL_PropertiesID SDLCALL SDL_GetTextureProperties(SDL_Texture *texture);
/**
* Query the attributes of a texture.
*
* \param texture the texture to query
* \param format a pointer filled in with the raw format of the texture; the
* actual format may differ, but pixel transfers will use this
* format (one of the SDL_PixelFormatEnum values). This argument
* can be NULL if you don't need this information.
* \param access a pointer filled in with the actual access to the texture
* (one of the SDL_TextureAccess values). This argument can be
* NULL if you don't need this information.
* \param w a pointer filled in with the width of the texture in pixels. This
* argument can be NULL if you don't need this information.
* \param h a pointer filled in with the height of the texture in pixels. This
* argument can be NULL if you don't need this information.
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateTexture
*/
extern DECLSPEC int SDLCALL SDL_QueryTexture(SDL_Texture *texture, Uint32 *format, int *access, int *w, int *h);
/**
* Set an additional color value multiplied into render copy operations.
*
* When this texture is rendered, during the copy operation each source color
* channel is modulated by the appropriate color value according to the
* following formula:
*
* `srcC = srcC * (color / 255)`
*
* Color modulation is not always supported by the renderer; it will return -1
* if color modulation is not supported.
*
* \param texture the texture to update
* \param r the red color value multiplied into copy operations
* \param g the green color value multiplied into copy operations
* \param b the blue color value multiplied into copy operations
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetTextureColorMod
* \sa SDL_SetTextureAlphaMod
*/
extern DECLSPEC int SDLCALL SDL_SetTextureColorMod(SDL_Texture *texture, Uint8 r, Uint8 g, Uint8 b);
/**
* Get the additional color value multiplied into render copy operations.
*
* \param texture the texture to query
* \param r a pointer filled in with the current red color value
* \param g a pointer filled in with the current green color value
* \param b a pointer filled in with the current blue color value
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetTextureAlphaMod
* \sa SDL_SetTextureColorMod
*/
extern DECLSPEC int SDLCALL SDL_GetTextureColorMod(SDL_Texture *texture, Uint8 *r, Uint8 *g, Uint8 *b);
/**
* Set an additional alpha value multiplied into render copy operations.
*
* When this texture is rendered, during the copy operation the source alpha
* value is modulated by this alpha value according to the following formula:
*
* `srcA = srcA * (alpha / 255)`
*
* Alpha modulation is not always supported by the renderer; it will return -1
* if alpha modulation is not supported.
*
* \param texture the texture to update
* \param alpha the source alpha value multiplied into copy operations
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetTextureAlphaMod
* \sa SDL_SetTextureColorMod
*/
extern DECLSPEC int SDLCALL SDL_SetTextureAlphaMod(SDL_Texture *texture, Uint8 alpha);
/**
* Get the additional alpha value multiplied into render copy operations.
*
* \param texture the texture to query
* \param alpha a pointer filled in with the current alpha value
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetTextureColorMod
* \sa SDL_SetTextureAlphaMod
*/
extern DECLSPEC int SDLCALL SDL_GetTextureAlphaMod(SDL_Texture *texture, Uint8 *alpha);
/**
* Set the blend mode for a texture, used by SDL_RenderTexture().
*
* If the blend mode is not supported, the closest supported mode is chosen
* and this function returns -1.
*
* \param texture the texture to update
* \param blendMode the SDL_BlendMode to use for texture blending
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetTextureBlendMode
* \sa SDL_RenderTexture
*/
extern DECLSPEC int SDLCALL SDL_SetTextureBlendMode(SDL_Texture *texture, SDL_BlendMode blendMode);
/**
* Get the blend mode used for texture copy operations.
*
* \param texture the texture to query
* \param blendMode a pointer filled in with the current SDL_BlendMode
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_SetTextureBlendMode
*/
extern DECLSPEC int SDLCALL SDL_GetTextureBlendMode(SDL_Texture *texture, SDL_BlendMode *blendMode);
/**
* Set the scale mode used for texture scale operations.
*
* If the scale mode is not supported, the closest supported mode is chosen.
*
* \param texture The texture to update.
* \param scaleMode the SDL_ScaleMode to use for texture scaling.
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetTextureScaleMode
*/
extern DECLSPEC int SDLCALL SDL_SetTextureScaleMode(SDL_Texture *texture, SDL_ScaleMode scaleMode);
/**
* Get the scale mode used for texture scale operations.
*
* \param texture the texture to query.
* \param scaleMode a pointer filled in with the current scale mode.
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_SetTextureScaleMode
*/
extern DECLSPEC int SDLCALL SDL_GetTextureScaleMode(SDL_Texture *texture, SDL_ScaleMode *scaleMode);
/**
* Update the given texture rectangle with new pixel data.
*
* The pixel data must be in the pixel format of the texture. Use
* SDL_QueryTexture() to query the pixel format of the texture.
*
* This is a fairly slow function, intended for use with static textures that
* do not change often.
*
* If the texture is intended to be updated often, it is preferred to create
* the texture as streaming and use the locking functions referenced below.
* While this function will work with streaming textures, for optimization
* reasons you may not get the pixels back if you lock the texture afterward.
*
* \param texture the texture to update
* \param rect an SDL_Rect structure representing the area to update, or NULL
* to update the entire texture
* \param pixels the raw pixel data in the format of the texture
* \param pitch the number of bytes in a row of pixel data, including padding
* between lines
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_CreateTexture
* \sa SDL_LockTexture
* \sa SDL_UnlockTexture
*/
extern DECLSPEC int SDLCALL SDL_UpdateTexture(SDL_Texture *texture, const SDL_Rect *rect, const void *pixels, int pitch);
/**
* Update a rectangle within a planar YV12 or IYUV texture with new pixel
* data.
*
* You can use SDL_UpdateTexture() as long as your pixel data is a contiguous
* block of Y and U/V planes in the proper order, but this function is
* available if your pixel data is not contiguous.
*
* \param texture the texture to update
* \param rect a pointer to the rectangle of pixels to update, or NULL to
* update the entire texture
* \param Yplane the raw pixel data for the Y plane
* \param Ypitch the number of bytes between rows of pixel data for the Y
* plane
* \param Uplane the raw pixel data for the U plane
* \param Upitch the number of bytes between rows of pixel data for the U
* plane
* \param Vplane the raw pixel data for the V plane
* \param Vpitch the number of bytes between rows of pixel data for the V
* plane
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_UpdateTexture
*/
extern DECLSPEC int SDLCALL SDL_UpdateYUVTexture(SDL_Texture *texture,
const SDL_Rect *rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *Uplane, int Upitch,
const Uint8 *Vplane, int Vpitch);
/**
* Update a rectangle within a planar NV12 or NV21 texture with new pixels.
*
* You can use SDL_UpdateTexture() as long as your pixel data is a contiguous
* block of NV12/21 planes in the proper order, but this function is available
* if your pixel data is not contiguous.
*
* \param texture the texture to update
* \param rect a pointer to the rectangle of pixels to update, or NULL to
* update the entire texture.
* \param Yplane the raw pixel data for the Y plane.
* \param Ypitch the number of bytes between rows of pixel data for the Y
* plane.
* \param UVplane the raw pixel data for the UV plane.
* \param UVpitch the number of bytes between rows of pixel data for the UV
* plane.
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*/
extern DECLSPEC int SDLCALL SDL_UpdateNVTexture(SDL_Texture *texture,
const SDL_Rect *rect,
const Uint8 *Yplane, int Ypitch,
const Uint8 *UVplane, int UVpitch);
/**
* Lock a portion of the texture for **write-only** pixel access.
*
* As an optimization, the pixels made available for editing don't necessarily
* contain the old texture data. This is a write-only operation, and if you
* need to keep a copy of the texture data you should do that at the
* application level.
*
* You must use SDL_UnlockTexture() to unlock the pixels and apply any
* changes.
*
* \param texture the texture to lock for access, which was created with
* `SDL_TEXTUREACCESS_STREAMING`
* \param rect an SDL_Rect structure representing the area to lock for access;
* NULL to lock the entire texture
* \param pixels this is filled in with a pointer to the locked pixels,
* appropriately offset by the locked area
* \param pitch this is filled in with the pitch of the locked pixels; the
* pitch is the length of one row in bytes
* \returns 0 on success or a negative error code if the texture is not valid
* or was not created with `SDL_TEXTUREACCESS_STREAMING`; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_UnlockTexture
*/
extern DECLSPEC int SDLCALL SDL_LockTexture(SDL_Texture *texture,
const SDL_Rect *rect,
void **pixels, int *pitch);
/**
* Lock a portion of the texture for **write-only** pixel access, and expose
* it as a SDL surface.
*
* Besides providing an SDL_Surface instead of raw pixel data, this function
* operates like SDL_LockTexture.
*
* As an optimization, the pixels made available for editing don't necessarily
* contain the old texture data. This is a write-only operation, and if you
* need to keep a copy of the texture data you should do that at the
* application level.
*
* You must use SDL_UnlockTexture() to unlock the pixels and apply any
* changes.
*
* The returned surface is freed internally after calling SDL_UnlockTexture()
* or SDL_DestroyTexture(). The caller should not free it.
*
* \param texture the texture to lock for access, which must be created with
* `SDL_TEXTUREACCESS_STREAMING`
* \param rect a pointer to the rectangle to lock for access. If the rect is
* NULL, the entire texture will be locked
* \param surface this is filled in with an SDL surface representing the
* locked area
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_LockTexture
* \sa SDL_UnlockTexture
*/
extern DECLSPEC int SDLCALL SDL_LockTextureToSurface(SDL_Texture *texture,
const SDL_Rect *rect,
SDL_Surface **surface);
/**
* Unlock a texture, uploading the changes to video memory, if needed.
*
* **Warning**: Please note that SDL_LockTexture() is intended to be
* write-only; it will not guarantee the previous contents of the texture will
* be provided. You must fully initialize any area of a texture that you lock
* before unlocking it, as the pixels might otherwise be uninitialized memory.
*
* Which is to say: locking and immediately unlocking a texture can result in
* corrupted textures, depending on the renderer in use.
*
* \param texture a texture locked by SDL_LockTexture()
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_LockTexture
*/
extern DECLSPEC void SDLCALL SDL_UnlockTexture(SDL_Texture *texture);
/**
* Set a texture as the current rendering target.
*
* The default render target is the window for which the renderer was created.
* To stop rendering to a texture and render to the window again, call this
* function with a NULL `texture`.
*
* \param renderer the rendering context
* \param texture the targeted texture, which must be created with the
* `SDL_TEXTUREACCESS_TARGET` flag, or NULL to render to the
* window instead of a texture.
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_GetRenderTarget
*/
extern DECLSPEC int SDLCALL SDL_SetRenderTarget(SDL_Renderer *renderer, SDL_Texture *texture);
/**
* Get the current render target.
*
* The default render target is the window for which the renderer was created,
* and is reported a NULL here.
*
* \param renderer the rendering context
* \returns the current render target or NULL for the default render target.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_SetRenderTarget
*/
extern DECLSPEC SDL_Texture *SDLCALL SDL_GetRenderTarget(SDL_Renderer *renderer);
/**
* Set a device independent resolution and presentation mode for rendering.
*
* This function sets the width and height of the logical rendering output. A
* render target is created at the specified size and used for rendering and
* then copied to the output during presentation.
*
* You can disable logical coordinates by setting the mode to
* SDL_LOGICAL_PRESENTATION_DISABLED, and in that case you get the full pixel
* resolution of the output window.
*
* You can convert coordinates in an event into rendering coordinates using
* SDL_ConvertEventToRenderCoordinates().
*
* \param renderer the rendering context
* \param w the width of the logical resolution
* \param h the height of the logical resolution
* \param mode the presentation mode used
* \param scale_mode the scale mode used
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_ConvertEventToRenderCoordinates
* \sa SDL_GetRenderLogicalPresentation
*/
extern DECLSPEC int SDLCALL SDL_SetRenderLogicalPresentation(SDL_Renderer *renderer, int w, int h, SDL_RendererLogicalPresentation mode, SDL_ScaleMode scale_mode);
/**
* Get device independent resolution and presentation mode for rendering.
*
* This function gets the width and height of the logical rendering output, or
* the output size in pixels if a logical resolution is not enabled.
*
* \param renderer the rendering context
* \param w an int to be filled with the width
* \param h an int to be filled with the height
* \param mode a pointer filled in with the presentation mode
* \param scale_mode a pointer filled in with the scale mode
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_SetRenderLogicalPresentation
*/
extern DECLSPEC int SDLCALL SDL_GetRenderLogicalPresentation(SDL_Renderer *renderer, int *w, int *h, SDL_RendererLogicalPresentation *mode, SDL_ScaleMode *scale_mode);
/**
* Get a point in render coordinates when given a point in window coordinates.
*
* \param renderer the rendering context
* \param window_x the x coordinate in window coordinates
* \param window_y the y coordinate in window coordinates
* \param x a pointer filled with the x coordinate in render coordinates
* \param y a pointer filled with the y coordinate in render coordinates
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.
*
* \sa SDL_SetRenderLogicalPresentation
* \sa SDL_SetRenderScale
*/
extern DECLSPEC int SDLCALL SDL_RenderCoordinatesFromWindow(SDL_Renderer *renderer, float window_x, float window_y, float *x, float *y);
/**
* Get a point in window coordinates when given a point in render coordinates.
*
* \param renderer the rendering context
* \param x the x coordinate in render coordinates
* \param y the y coordinate in render coordinates
* \param window_x a pointer filled with the x coordinate in window
* coordinates
* \param window_y a pointer filled with the y coordinate in window
* coordinates
* \returns 0 on success or a negative error code on failure; call
* SDL_GetError() for more information.
*
* \since This function is available since SDL 3.0.0.