From 304bab2aced9cae51d2e4c09f3d9e06c66ff175d Mon Sep 17 00:00:00 2001 From: Star Rauchenberger Date: Sun, 20 Mar 2022 13:03:18 -0400 Subject: we can build a window app! build type must be set to Release or it's horribly slow, and fullscreen does not work --- vendor/SDL2/include/SDL_render.h | 1890 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 1890 insertions(+) create mode 100644 vendor/SDL2/include/SDL_render.h (limited to 'vendor/SDL2/include/SDL_render.h') diff --git a/vendor/SDL2/include/SDL_render.h b/vendor/SDL2/include/SDL_render.h new file mode 100644 index 0000000..a7e4908 --- /dev/null +++ b/vendor/SDL2/include/SDL_render.h @@ -0,0 +1,1890 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2022 Sam Lantinga + + 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: http://bugzilla.libsdl.org/show_bug.cgi?id=1995 + */ + +#ifndef SDL_render_h_ +#define SDL_render_h_ + +#include "SDL_stdinc.h" +#include "SDL_rect.h" +#include "SDL_video.h" + +#include "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_RENDERER_TARGETTEXTURE = 0x00000008 /**< The renderer supports + rendering to texture */ +} 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_ScaleModeNearest, /**< nearest pixel sampling */ + SDL_ScaleModeLinear, /**< linear filtering */ + SDL_ScaleModeBest /**< 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; + +/** + * The texture channel modulation used in SDL_RenderCopy(). + */ +typedef enum +{ + SDL_TEXTUREMODULATE_NONE = 0x00000000, /**< No modulation */ + SDL_TEXTUREMODULATE_COLOR = 0x00000001, /**< srcC = srcC * color */ + SDL_TEXTUREMODULATE_ALPHA = 0x00000002 /**< srcA = srcA * alpha */ +} SDL_TextureModulate; + +/** + * Flip constants for SDL_RenderCopyEx + */ +typedef enum +{ + SDL_FLIP_NONE = 0x00000000, /**< Do not flip */ + SDL_FLIP_HORIZONTAL = 0x00000001, /**< flip horizontally */ + SDL_FLIP_VERTICAL = 0x00000002 /**< flip vertically */ +} SDL_RendererFlip; + +/** + * 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 2.0.0. + * + * \sa SDL_CreateRenderer + * \sa SDL_GetRenderDriverInfo + */ +extern DECLSPEC int SDLCALL SDL_GetNumRenderDrivers(void); + +/** + * Get info about a specific 2D rendering driver for the current display. + * + * \param index the index of the driver to query information about + * \param info an SDL_RendererInfo structure to be filled with information on + * the rendering driver + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_CreateRenderer + * \sa SDL_GetNumRenderDrivers + */ +extern DECLSPEC int SDLCALL SDL_GetRenderDriverInfo(int index, + SDL_RendererInfo * info); + +/** + * 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 -1 on error; call SDL_GetError() for more + * information. + * + * \since This function is available since SDL 2.0.0. + * + * \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. + * + * \param window the window where rendering is displayed + * \param index the index of the rendering driver to initialize, or -1 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 2.0.0. + * + * \sa SDL_CreateSoftwareRenderer + * \sa SDL_DestroyRenderer + * \sa SDL_GetNumRenderDrivers + * \sa SDL_GetRendererInfo + */ +extern DECLSPEC SDL_Renderer * SDLCALL SDL_CreateRenderer(SDL_Window * window, + int index, Uint32 flags); + +/** + * 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 2.0.0. + * + * \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 2.0.0. + * + * \sa SDL_CreateRenderer + */ +extern DECLSPEC SDL_Renderer * SDLCALL SDL_GetRenderer(SDL_Window * window); + +/** + * 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 2.0.0. + * + * \sa SDL_CreateRenderer + */ +extern DECLSPEC int SDLCALL SDL_GetRendererInfo(SDL_Renderer * renderer, + SDL_RendererInfo * info); + +/** + * Get the output size in pixels of a rendering context. + * + * Due to high-dpi displays, you might end up with a rendering context that + * has more pixels than the window that contains it, so use this instead of + * SDL_GetWindowSize() to decide how much drawing area you have. + * + * \param renderer the rendering context + * \param w an int filled with the width + * \param h an int filled with the 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 2.0.0. + * + * \sa SDL_GetRenderer + */ +extern DECLSPEC int SDLCALL SDL_GetRendererOutputSize(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 2.0.0. + * + * \sa SDL_CreateTextureFromSurface + * \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 2.0.0. + * + * \sa SDL_CreateTexture + * \sa SDL_DestroyTexture + * \sa SDL_QueryTexture + */ +extern DECLSPEC SDL_Texture * SDLCALL SDL_CreateTextureFromSurface(SDL_Renderer * renderer, SDL_Surface * surface); + +/** + * 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) + * \param access a pointer filled in with the actual access to the texture + * (one of the SDL_TextureAccess values) + * \param w a pointer filled in with the width of the texture in pixels + * \param h a pointer filled in with the height of the texture 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 2.0.0. + * + * \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 2.0.0. + * + * \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 2.0.0. + * + * \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 2.0.0. + * + * \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 2.0.0. + * + * \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_RenderCopy(). + * + * 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 2.0.0. + * + * \sa SDL_GetTextureBlendMode + * \sa SDL_RenderCopy + */ +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 2.0.0. + * + * \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 -1 if the texture is not valid. + * + * \since This function is available since SDL 2.0.12. + * + * \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. + * \return 0 on success, or -1 if the texture is not valid. + * + * \since This function is available since SDL 2.0.12. + * + * \sa SDL_SetTextureScaleMode + */ +extern DECLSPEC int SDLCALL SDL_GetTextureScaleMode(SDL_Texture * texture, + SDL_ScaleMode *scaleMode); + +/** + * Associate a user-specified pointer with a texture. + * + * \param texture the texture to update. + * \param userdata the pointer to associate with the texture. + * \returns 0 on success, or -1 if the texture is not valid. + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_GetTextureUserData + */ +extern DECLSPEC int SDLCALL SDL_SetTextureUserData(SDL_Texture * texture, + void *userdata); + +/** + * Get the user-specified pointer associated with a texture + * + * \param texture the texture to query. + * \return the pointer associated with the texture, or NULL if the texture is + * not valid. + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_SetTextureUserData + */ +extern DECLSPEC void * SDLCALL SDL_GetTextureUserData(SDL_Texture * texture); + +/** + * 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 2.0.0. + * + * \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 -1 if the texture is not valid; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.1. + * + * \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. + * \return 0 on success, or -1 if the texture is not valid. + * + * \since This function is available since SDL 2.0.16. + */ +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 2.0.0. + * + * \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 was 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 -1 if the texture is not valid or was not created + * with `SDL_TEXTUREACCESS_STREAMING` + * + * \since This function is available since SDL 2.0.12. + * + * \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 2.0.0. + * + * \sa SDL_LockTexture + */ +extern DECLSPEC void SDLCALL SDL_UnlockTexture(SDL_Texture * texture); + +/** + * Determine whether a renderer supports the use of render targets. + * + * \param renderer the renderer that will be checked + * \returns SDL_TRUE if supported or SDL_FALSE if not. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetRenderTarget + */ +extern DECLSPEC SDL_bool SDLCALL SDL_RenderTargetSupported(SDL_Renderer *renderer); + +/** + * Set a texture as the current rendering target. + * + * Before using this function, you should check the + * `SDL_RENDERER_TARGETTEXTURE` bit in the flags of SDL_RendererInfo to see if + * render targets are supported. + * + * 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 2.0.0. + * + * \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 2.0.0. + * + * \sa SDL_SetRenderTarget + */ +extern DECLSPEC SDL_Texture * SDLCALL SDL_GetRenderTarget(SDL_Renderer *renderer); + +/** + * Set a device independent resolution for rendering. + * + * This function uses the viewport and scaling functionality to allow a fixed + * logical resolution for rendering, regardless of the actual output + * resolution. If the actual output resolution doesn't have the same aspect + * ratio the output rendering will be centered within the output display. + * + * If the output display is a window, mouse and touch events in the window + * will be filtered and scaled so they seem to arrive within the logical + * resolution. The SDL_HINT_MOUSE_RELATIVE_SCALING hint controls whether + * relative motion events are also scaled. + * + * If this function results in scaling or subpixel drawing by the rendering + * backend, it will be handled using the appropriate quality hints. + * + * \param renderer the renderer for which resolution should be set + * \param w the width of the logical resolution + * \param h the height of the logical resolution + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderGetLogicalSize + */ +extern DECLSPEC int SDLCALL SDL_RenderSetLogicalSize(SDL_Renderer * renderer, int w, int h); + +/** + * Get device independent resolution for rendering. + * + * This may return 0 for `w` and `h` if the SDL_Renderer has never had its + * logical size set by SDL_RenderSetLogicalSize() and never had a render + * target set. + * + * \param renderer a rendering context + * \param w an int to be filled with the width + * \param h an int to be filled with the height + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderSetLogicalSize + */ +extern DECLSPEC void SDLCALL SDL_RenderGetLogicalSize(SDL_Renderer * renderer, int *w, int *h); + +/** + * Set whether to force integer scales for resolution-independent rendering. + * + * This function restricts the logical viewport to integer values - that is, + * when a resolution is between two multiples of a logical size, the viewport + * size is rounded down to the lower multiple. + * + * \param renderer the renderer for which integer scaling should be set + * \param enable enable or disable the integer scaling for rendering + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_RenderGetIntegerScale + * \sa SDL_RenderSetLogicalSize + */ +extern DECLSPEC int SDLCALL SDL_RenderSetIntegerScale(SDL_Renderer * renderer, + SDL_bool enable); + +/** + * Get whether integer scales are forced for resolution-independent rendering. + * + * \param renderer the renderer from which integer scaling should be queried + * \returns SDL_TRUE if integer scales are forced or SDL_FALSE if not and on + * failure; call SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.5. + * + * \sa SDL_RenderSetIntegerScale + */ +extern DECLSPEC SDL_bool SDLCALL SDL_RenderGetIntegerScale(SDL_Renderer * renderer); + +/** + * Set the drawing area for rendering on the current target. + * + * When the window is resized, the viewport is reset to fill the entire new + * window size. + * + * \param renderer the rendering context + * \param rect the SDL_Rect structure representing the drawing area, or NULL + * to set the viewport to the entire target + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderGetViewport + */ +extern DECLSPEC int SDLCALL SDL_RenderSetViewport(SDL_Renderer * renderer, + const SDL_Rect * rect); + +/** + * Get the drawing area for the current target. + * + * \param renderer the rendering context + * \param rect an SDL_Rect structure filled in with the current drawing area + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderSetViewport + */ +extern DECLSPEC void SDLCALL SDL_RenderGetViewport(SDL_Renderer * renderer, + SDL_Rect * rect); + +/** + * Set the clip rectangle for rendering on the specified target. + * + * \param renderer the rendering context for which clip rectangle should be + * set + * \param rect an SDL_Rect structure representing the clip area, relative to + * the viewport, or NULL to disable clipping + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderGetClipRect + * \sa SDL_RenderIsClipEnabled + */ +extern DECLSPEC int SDLCALL SDL_RenderSetClipRect(SDL_Renderer * renderer, + const SDL_Rect * rect); + +/** + * Get the clip rectangle for the current target. + * + * \param renderer the rendering context from which clip rectangle should be + * queried + * \param rect an SDL_Rect structure filled in with the current clipping area + * or an empty rectangle if clipping is disabled + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderIsClipEnabled + * \sa SDL_RenderSetClipRect + */ +extern DECLSPEC void SDLCALL SDL_RenderGetClipRect(SDL_Renderer * renderer, + SDL_Rect * rect); + +/** + * Get whether clipping is enabled on the given renderer. + * + * \param renderer the renderer from which clip state should be queried + * \returns SDL_TRUE if clipping is enabled or SDL_FALSE if not; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.4. + * + * \sa SDL_RenderGetClipRect + * \sa SDL_RenderSetClipRect + */ +extern DECLSPEC SDL_bool SDLCALL SDL_RenderIsClipEnabled(SDL_Renderer * renderer); + + +/** + * Set the drawing scale for rendering on the current target. + * + * The drawing coordinates are scaled by the x/y scaling factors before they + * are used by the renderer. This allows resolution independent drawing with a + * single coordinate system. + * + * If this results in scaling or subpixel drawing by the rendering backend, it + * will be handled using the appropriate quality hints. For best results use + * integer scaling factors. + * + * \param renderer a rendering context + * \param scaleX the horizontal scaling factor + * \param scaleY the vertical scaling factor + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderGetScale + * \sa SDL_RenderSetLogicalSize + */ +extern DECLSPEC int SDLCALL SDL_RenderSetScale(SDL_Renderer * renderer, + float scaleX, float scaleY); + +/** + * Get the drawing scale for the current target. + * + * \param renderer the renderer from which drawing scale should be queried + * \param scaleX a pointer filled in with the horizontal scaling factor + * \param scaleY a pointer filled in with the vertical scaling factor + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderSetScale + */ +extern DECLSPEC void SDLCALL SDL_RenderGetScale(SDL_Renderer * renderer, + float *scaleX, float *scaleY); + +/** + * Get logical coordinates of point in renderer when given real coordinates of + * point in window. + * + * Logical coordinates will differ from real coordinates when render is scaled + * and logical renderer size set + * + * \param renderer the renderer from which the logical coordinates should be + * calcualted + * \param windowX the real X coordinate in the window + * \param windowY the real Y coordinate in the window + * \param logicalX the pointer filled with the logical x coordinate + * \param logicalY the pointer filled with the logical y coordinate + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_RenderGetScale + * \sa SDL_RenderSetScale + * \sa SDL_RenderGetLogicalSize + * \sa SDL_RenderSetLogicalSize + */ +extern DECLSPEC void SDLCALL SDL_RenderWindowToLogical(SDL_Renderer * renderer, + int windowX, int windowY, + float *logicalX, float *logicalY); + + /** + * Get real coordinates of point in window when given logical coordinates of point in renderer. + * Logical coordinates will differ from real coordinates when render is scaled and logical renderer size set + * + * \param renderer the renderer from which the window coordinates should be calculated + * \param logicalX the logical x coordinate + * \param logicalY the logical y coordinate + * \param windowX the pointer filled with the real X coordinate in the window + * \param windowY the pointer filled with the real Y coordinate in the window + + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_RenderGetScale + * \sa SDL_RenderSetScale + * \sa SDL_RenderGetLogicalSize + * \sa SDL_RenderSetLogicalSize + */ +extern DECLSPEC void SDLCALL SDL_RenderLogicalToWindow(SDL_Renderer * renderer, + float logicalX, float logicalY, + int *windowX, int *windowY); + +/** + * Set the color used for drawing operations (Rect, Line and Clear). + * + * Set the color for drawing or filling rectangles, lines, and points, and for + * SDL_RenderClear(). + * + * \param renderer the rendering context + * \param r the red value used to draw on the rendering target + * \param g the green value used to draw on the rendering target + * \param b the blue value used to draw on the rendering target + * \param a the alpha value used to draw on the rendering target; usually + * `SDL_ALPHA_OPAQUE` (255). Use SDL_SetRenderDrawBlendMode to + * specify how the alpha channel is 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 2.0.0. + * + * \sa SDL_GetRenderDrawColor + * \sa SDL_RenderClear + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + */ +extern DECLSPEC int SDLCALL SDL_SetRenderDrawColor(SDL_Renderer * renderer, + Uint8 r, Uint8 g, Uint8 b, + Uint8 a); + +/** + * Get the color used for drawing operations (Rect, Line and Clear). + * + * \param renderer the rendering context + * \param r a pointer filled in with the red value used to draw on the + * rendering target + * \param g a pointer filled in with the green value used to draw on the + * rendering target + * \param b a pointer filled in with the blue value used to draw on the + * rendering target + * \param a a pointer filled in with the alpha value used to draw on the + * rendering target; usually `SDL_ALPHA_OPAQUE` (255) + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_GetRenderDrawColor(SDL_Renderer * renderer, + Uint8 * r, Uint8 * g, Uint8 * b, + Uint8 * a); + +/** + * Set the blend mode used for drawing operations (Fill and Line). + * + * If the blend mode is not supported, the closest supported mode is chosen. + * + * \param renderer the rendering context + * \param blendMode the SDL_BlendMode to use for 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 2.0.0. + * + * \sa SDL_GetRenderDrawBlendMode + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + */ +extern DECLSPEC int SDLCALL SDL_SetRenderDrawBlendMode(SDL_Renderer * renderer, + SDL_BlendMode blendMode); + +/** + * Get the blend mode used for drawing operations. + * + * \param renderer the rendering context + * \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 2.0.0. + * + * \sa SDL_SetRenderDrawBlendMode + */ +extern DECLSPEC int SDLCALL SDL_GetRenderDrawBlendMode(SDL_Renderer * renderer, + SDL_BlendMode *blendMode); + +/** + * Clear the current rendering target with the drawing color. + * + * This function clears the entire rendering target, ignoring the viewport and + * the clip rectangle. + * + * \param renderer the rendering context + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderClear(SDL_Renderer * renderer); + +/** + * Draw a point on the current rendering target. + * + * SDL_RenderDrawPoint() draws a single point. If you want to draw multiple, + * use SDL_RenderDrawPoints() instead. + * + * \param renderer the rendering context + * \param x the x coordinate of the point + * \param y the y coordinate of the point + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + * \sa SDL_RenderPresent + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawPoint(SDL_Renderer * renderer, + int x, int y); + +/** + * Draw multiple points on the current rendering target. + * + * \param renderer the rendering context + * \param points an array of SDL_Point structures that represent the points to + * draw + * \param count the number of points to draw + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + * \sa SDL_RenderPresent + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawPoints(SDL_Renderer * renderer, + const SDL_Point * points, + int count); + +/** + * Draw a line on the current rendering target. + * + * SDL_RenderDrawLine() draws the line to include both end points. If you want + * to draw multiple, connecting lines use SDL_RenderDrawLines() instead. + * + * \param renderer the rendering context + * \param x1 the x coordinate of the start point + * \param y1 the y coordinate of the start point + * \param x2 the x coordinate of the end point + * \param y2 the y coordinate of the end point + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + * \sa SDL_RenderPresent + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawLine(SDL_Renderer * renderer, + int x1, int y1, int x2, int y2); + +/** + * Draw a series of connected lines on the current rendering target. + * + * \param renderer the rendering context + * \param points an array of SDL_Point structures representing points along + * the lines + * \param count the number of points, drawing count-1 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 2.0.0. + * + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + * \sa SDL_RenderPresent + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawLines(SDL_Renderer * renderer, + const SDL_Point * points, + int count); + +/** + * Draw a rectangle on the current rendering target. + * + * \param renderer the rendering context + * \param rect an SDL_Rect structure representing the rectangle to draw, or + * NULL to outline the entire rendering target + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + * \sa SDL_RenderPresent + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawRect(SDL_Renderer * renderer, + const SDL_Rect * rect); + +/** + * Draw some number of rectangles on the current rendering target. + * + * \param renderer the rendering context + * \param rects an array of SDL_Rect structures representing the rectangles to + * be drawn + * \param count the number of rectangles + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + * \sa SDL_RenderPresent + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawRects(SDL_Renderer * renderer, + const SDL_Rect * rects, + int count); + +/** + * Fill a rectangle on the current rendering target with the drawing color. + * + * The current drawing color is set by SDL_SetRenderDrawColor(), and the + * color's alpha value is ignored unless blending is enabled with the + * appropriate call to SDL_SetRenderDrawBlendMode(). + * + * \param renderer the rendering context + * \param rect the SDL_Rect structure representing the rectangle to fill, or + * NULL for the entire rendering target + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRects + * \sa SDL_RenderPresent + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC int SDLCALL SDL_RenderFillRect(SDL_Renderer * renderer, + const SDL_Rect * rect); + +/** + * Fill some number of rectangles on the current rendering target with the + * drawing color. + * + * \param renderer the rendering context + * \param rects an array of SDL_Rect structures representing the rectangles to + * be filled + * \param count the number of rectangles + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderPresent + */ +extern DECLSPEC int SDLCALL SDL_RenderFillRects(SDL_Renderer * renderer, + const SDL_Rect * rects, + int count); + +/** + * Copy a portion of the texture to the current rendering target. + * + * The texture is blended with the destination based on its blend mode set + * with SDL_SetTextureBlendMode(). + * + * The texture color is affected based on its color modulation set by + * SDL_SetTextureColorMod(). + * + * The texture alpha is affected based on its alpha modulation set by + * SDL_SetTextureAlphaMod(). + * + * \param renderer the rendering context + * \param texture the source texture + * \param srcrect the source SDL_Rect structure or NULL for the entire texture + * \param dstrect the destination SDL_Rect structure or NULL for the entire + * rendering target; the texture will be stretched to fill the + * given rectangle + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderCopyEx + * \sa SDL_SetTextureAlphaMod + * \sa SDL_SetTextureBlendMode + * \sa SDL_SetTextureColorMod + */ +extern DECLSPEC int SDLCALL SDL_RenderCopy(SDL_Renderer * renderer, + SDL_Texture * texture, + const SDL_Rect * srcrect, + const SDL_Rect * dstrect); + +/** + * Copy a portion of the texture to the current rendering, with optional + * rotation and flipping. + * + * Copy a portion of the texture to the current rendering target, optionally + * rotating it by angle around the given center and also flipping it + * top-bottom and/or left-right. + * + * The texture is blended with the destination based on its blend mode set + * with SDL_SetTextureBlendMode(). + * + * The texture color is affected based on its color modulation set by + * SDL_SetTextureColorMod(). + * + * The texture alpha is affected based on its alpha modulation set by + * SDL_SetTextureAlphaMod(). + * + * \param renderer the rendering context + * \param texture the source texture + * \param srcrect the source SDL_Rect structure or NULL for the entire texture + * \param dstrect the destination SDL_Rect structure or NULL for the entire + * rendering target + * \param angle an angle in degrees that indicates the rotation that will be + * applied to dstrect, rotating it in a clockwise direction + * \param center a pointer to a point indicating the point around which + * dstrect will be rotated (if NULL, rotation will be done + * around `dstrect.w / 2`, `dstrect.h / 2`) + * \param flip a SDL_RendererFlip value stating which flipping actions should + * be performed on the 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 2.0.0. + * + * \sa SDL_RenderCopy + * \sa SDL_SetTextureAlphaMod + * \sa SDL_SetTextureBlendMode + * \sa SDL_SetTextureColorMod + */ +extern DECLSPEC int SDLCALL SDL_RenderCopyEx(SDL_Renderer * renderer, + SDL_Texture * texture, + const SDL_Rect * srcrect, + const SDL_Rect * dstrect, + const double angle, + const SDL_Point *center, + const SDL_RendererFlip flip); + + +/** + * Draw a point on the current rendering target at subpixel precision. + * + * \param renderer The renderer which should draw a point. + * \param x The x coordinate of the point. + * \param y The y coordinate of the point. + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawPointF(SDL_Renderer * renderer, + float x, float y); + +/** + * Draw multiple points on the current rendering target at subpixel precision. + * + * \param renderer The renderer which should draw multiple points. + * \param points The points to draw + * \param count The number of points to draw + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawPointsF(SDL_Renderer * renderer, + const SDL_FPoint * points, + int count); + +/** + * Draw a line on the current rendering target at subpixel precision. + * + * \param renderer The renderer which should draw a line. + * \param x1 The x coordinate of the start point. + * \param y1 The y coordinate of the start point. + * \param x2 The x coordinate of the end point. + * \param y2 The y coordinate of the end point. + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawLineF(SDL_Renderer * renderer, + float x1, float y1, float x2, float y2); + +/** + * Draw a series of connected lines on the current rendering target at + * subpixel precision. + * + * \param renderer The renderer which should draw multiple lines. + * \param points The points along the lines + * \param count The number of points, drawing count-1 lines + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawLinesF(SDL_Renderer * renderer, + const SDL_FPoint * points, + int count); + +/** + * Draw a rectangle on the current rendering target at subpixel precision. + * + * \param renderer The renderer which should draw a rectangle. + * \param rect A pointer to the destination rectangle, or NULL to outline the + * entire rendering target. + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawRectF(SDL_Renderer * renderer, + const SDL_FRect * rect); + +/** + * Draw some number of rectangles on the current rendering target at subpixel + * precision. + * + * \param renderer The renderer which should draw multiple rectangles. + * \param rects A pointer to an array of destination rectangles. + * \param count The number of rectangles. + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderDrawRectsF(SDL_Renderer * renderer, + const SDL_FRect * rects, + int count); + +/** + * Fill a rectangle on the current rendering target with the drawing color at + * subpixel precision. + * + * \param renderer The renderer which should fill a rectangle. + * \param rect A pointer to the destination rectangle, or NULL for the entire + * rendering target. + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderFillRectF(SDL_Renderer * renderer, + const SDL_FRect * rect); + +/** + * Fill some number of rectangles on the current rendering target with the + * drawing color at subpixel precision. + * + * \param renderer The renderer which should fill multiple rectangles. + * \param rects A pointer to an array of destination rectangles. + * \param count The number of rectangles. + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderFillRectsF(SDL_Renderer * renderer, + const SDL_FRect * rects, + int count); + +/** + * Copy a portion of the texture to the current rendering target at subpixel + * precision. + * + * \param renderer The renderer which should copy parts of a texture. + * \param texture The source texture. + * \param srcrect A pointer to the source rectangle, or NULL for the entire + * texture. + * \param dstrect A pointer to the destination rectangle, or NULL for the + * entire rendering target. + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderCopyF(SDL_Renderer * renderer, + SDL_Texture * texture, + const SDL_Rect * srcrect, + const SDL_FRect * dstrect); + +/** + * Copy a portion of the source texture to the current rendering target, with + * rotation and flipping, at subpixel precision. + * + * \param renderer The renderer which should copy parts of a texture. + * \param texture The source texture. + * \param srcrect A pointer to the source rectangle, or NULL for the entire + * texture. + * \param dstrect A pointer to the destination rectangle, or NULL for the + * entire rendering target. + * \param angle An angle in degrees that indicates the rotation that will be + * applied to dstrect, rotating it in a clockwise direction + * \param center A pointer to a point indicating the point around which + * dstrect will be rotated (if NULL, rotation will be done + * around dstrect.w/2, dstrect.h/2). + * \param flip An SDL_RendererFlip value stating which flipping actions should + * be performed on the texture + * \return 0 on success, or -1 on error + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderCopyExF(SDL_Renderer * renderer, + SDL_Texture * texture, + const SDL_Rect * srcrect, + const SDL_FRect * dstrect, + const double angle, + const SDL_FPoint *center, + const SDL_RendererFlip flip); + +/** + * Render a list of triangles, optionally using a texture and indices into the + * vertex array Color and alpha modulation is done per vertex + * (SDL_SetTextureColorMod and SDL_SetTextureAlphaMod are ignored). + * + * \param texture (optional) The SDL texture to use. + * \param vertices Vertices. + * \param num_vertices Number of vertices. + * \param indices (optional) An array of integer indices into the 'vertices' + * array, if NULL all vertices will be rendered in sequential + * order. + * \param num_indices Number of indices. + * \return 0 on success, or -1 if the operation is not supported + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_RenderGeometryRaw + * \sa SDL_Vertex + */ +extern DECLSPEC int SDLCALL SDL_RenderGeometry(SDL_Renderer *renderer, + SDL_Texture *texture, + const SDL_Vertex *vertices, int num_vertices, + const int *indices, int num_indices); + +/** + * Render a list of triangles, optionally using a texture and indices into the + * vertex arrays Color and alpha modulation is done per vertex + * (SDL_SetTextureColorMod and SDL_SetTextureAlphaMod are ignored). + * + * \param texture (optional) The SDL texture to use. + * \param xy Vertex positions + * \param xy_stride Byte size to move from one element to the next element + * \param color Vertex colors (as SDL_Color) + * \param color_stride Byte size to move from one element to the next element + * \param uv Vertex normalized texture coordinates + * \param uv_stride Byte size to move from one element to the next element + * \param num_vertices Number of vertices. + * \param indices (optional) An array of indices into the 'vertices' arrays, + * if NULL all vertices will be rendered in sequential order. + * \param num_indices Number of indices. + * \param size_indices Index size: 1 (byte), 2 (short), 4 (int) + * \return 0 on success, or -1 if the operation is not supported + * + * \since This function is available since SDL 2.0.18. + * + * \sa SDL_RenderGeometry + * \sa SDL_Vertex + */ +extern DECLSPEC int SDLCALL SDL_RenderGeometryRaw(SDL_Renderer *renderer, + SDL_Texture *texture, + const float *xy, int xy_stride, + const SDL_Color *color, int color_stride, + const float *uv, int uv_stride, + int num_vertices, + const void *indices, int num_indices, int size_indices); + +/** + * Read pixels from the current rendering target to an array of pixels. + * + * **WARNING**: This is a very slow operation, and should not be used + * frequently. + * + * `pitch` specifies the number of bytes between rows in the destination + * `pixels` data. This allows you to write to a subrectangle or have padded + * rows in the destination. Generally, `pitch` should equal the number of + * pixels per row in the `pixels` data times the number of bytes per pixel, + * but it might contain additional padding (for example, 24bit RGB Windows + * Bitmap data pads all rows to multiples of 4 bytes). + * + * \param renderer the rendering context + * \param rect an SDL_Rect structure representing the area to read, or NULL + * for the entire render target + * \param format an SDL_PixelFormatEnum value of the desired format of the + * pixel data, or 0 to use the format of the rendering target + * \param pixels a pointer to the pixel data to copy into + * \param pitch the pitch of the `pixels` parameter + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + */ +extern DECLSPEC int SDLCALL SDL_RenderReadPixels(SDL_Renderer * renderer, + const SDL_Rect * rect, + Uint32 format, + void *pixels, int pitch); + +/** + * Update the screen with any rendering performed since the previous call. + * + * SDL's rendering functions operate on a backbuffer; that is, calling a + * rendering function such as SDL_RenderDrawLine() does not directly put a + * line on the screen, but rather updates the backbuffer. As such, you compose + * your entire scene and *present* the composed backbuffer to the screen as a + * complete picture. + * + * Therefore, when using SDL's rendering API, one does all drawing intended + * for the frame, and then calls this function once per frame to present the + * final drawing to the user. + * + * The backbuffer should be considered invalidated after each present; do not + * assume that previous contents will exist between frames. You are strongly + * encouraged to call SDL_RenderClear() to initialize the backbuffer before + * starting each new frame's drawing, even if you plan to overwrite every + * pixel. + * + * \param renderer the rendering context + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_RenderClear + * \sa SDL_RenderDrawLine + * \sa SDL_RenderDrawLines + * \sa SDL_RenderDrawPoint + * \sa SDL_RenderDrawPoints + * \sa SDL_RenderDrawRect + * \sa SDL_RenderDrawRects + * \sa SDL_RenderFillRect + * \sa SDL_RenderFillRects + * \sa SDL_SetRenderDrawBlendMode + * \sa SDL_SetRenderDrawColor + */ +extern DECLSPEC void SDLCALL SDL_RenderPresent(SDL_Renderer * renderer); + +/** + * Destroy the specified texture. + * + * Passing NULL or an otherwise invalid texture will set the SDL error message + * to "Invalid texture". + * + * \param texture the texture to destroy + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_CreateTexture + * \sa SDL_CreateTextureFromSurface + */ +extern DECLSPEC void SDLCALL SDL_DestroyTexture(SDL_Texture * texture); + +/** + * Destroy the rendering context for a window and free associated textures. + * + * \param renderer the rendering context + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_CreateRenderer + */ +extern DECLSPEC void SDLCALL SDL_DestroyRenderer(SDL_Renderer * renderer); + +/** + * Force the rendering context to flush any pending commands to the underlying + * rendering API. + * + * You do not need to (and in fact, shouldn't) call this function unless you + * are planning to call into OpenGL/Direct3D/Metal/whatever directly in + * addition to using an SDL_Renderer. + * + * This is for a very-specific case: if you are using SDL's render API, you + * asked for a specific renderer backend (OpenGL, Direct3D, etc), you set + * SDL_HINT_RENDER_BATCHING to "1", and you plan to make OpenGL/D3D/whatever + * calls in addition to SDL render API calls. If all of this applies, you + * should call SDL_RenderFlush() between calls to SDL's render API and the + * low-level API you're using in cooperation. + * + * In all other cases, you can ignore this function. This is only here to get + * maximum performance out of a specific situation. In all other cases, SDL + * will do the right thing, perhaps at a performance loss. + * + * This function is first available in SDL 2.0.10, and is not needed in 2.0.9 + * and earlier, as earlier versions did not queue rendering commands at all, + * instead flushing them to the OS immediately. + * + * \param renderer the rendering context + * \returns 0 on success or a negative error code on failure; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.10. + */ +extern DECLSPEC int SDLCALL SDL_RenderFlush(SDL_Renderer * renderer); + + +/** + * Bind an OpenGL/ES/ES2 texture to the current context. + * + * This is for use with OpenGL instructions when rendering OpenGL primitives + * directly. + * + * If not NULL, `texw` and `texh` will be filled with the width and height + * values suitable for the provided texture. In most cases, both will be 1.0, + * however, on systems that support the GL_ARB_texture_rectangle extension, + * these values will actually be the pixel width and height used to create the + * texture, so this factor needs to be taken into account when providing + * texture coordinates to OpenGL. + * + * You need a renderer to create an SDL_Texture, therefore you can only use + * this function with an implicit OpenGL context from SDL_CreateRenderer(), + * not with your own OpenGL context. If you need control over your OpenGL + * context, you need to write your own texture-loading methods. + * + * Also note that SDL may upload RGB textures as BGR (or vice-versa), and + * re-order the color channels in the shaders phase, so the uploaded texture + * may have swapped color channels. + * + * \param texture the texture to bind to the current OpenGL/ES/ES2 context + * \param texw a pointer to a float value which will be filled with the + * texture width or NULL if you don't need that value + * \param texh a pointer to a float value which will be filled with the + * texture height or NULL if you don't need that value + * \returns 0 on success, or -1 if the operation is not supported; call + * SDL_GetError() for more information. + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_MakeCurrent + * \sa SDL_GL_UnbindTexture + */ +extern DECLSPEC int SDLCALL SDL_GL_BindTexture(SDL_Texture *texture, float *texw, float *texh); + +/** + * Unbind an OpenGL/ES/ES2 texture from the current context. + * + * See SDL_GL_BindTexture() for examples on how to use these functions + * + * \param texture the texture to unbind from the current OpenGL/ES/ES2 context + * \returns 0 on success, or -1 if the operation is not supported + * + * \since This function is available since SDL 2.0.0. + * + * \sa SDL_GL_BindTexture + * \sa SDL_GL_MakeCurrent + */ +extern DECLSPEC int SDLCALL SDL_GL_UnbindTexture(SDL_Texture *texture); + +/** + * Get the CAMetalLayer associated with the given Metal renderer. + * + * This function returns `void *`, so SDL doesn't have to include Metal's + * headers, but it can be safely cast to a `CAMetalLayer *`. + * + * \param renderer The renderer to query + * \returns a `CAMetalLayer *` on success, or NULL if the renderer isn't a + * Metal renderer + * + * \since This function is available since SDL 2.0.8. + * + * \sa SDL_RenderGetMetalCommandEncoder + */ +extern DECLSPEC void *SDLCALL SDL_RenderGetMetalLayer(SDL_Renderer * renderer); + +/** + * Get the Metal command encoder for the current frame + * + * This function returns `void *`, so SDL doesn't have to include Metal's + * headers, but it can be safely cast to an `id`. + * + * Note that as of SDL 2.0.18, this will return NULL if Metal refuses to give + * SDL a drawable to render to, which might happen if the window is + * hidden/minimized/offscreen. This doesn't apply to command encoders for + * render targets, just the window's backbacker. Check your return values! + * + * \param renderer The renderer to query + * \returns an `id` on success, or NULL if the + * renderer isn't a Metal renderer or there was an error. + * + * \since This function is available since SDL 2.0.8. + * + * \sa SDL_RenderGetMetalLayer + */ +extern DECLSPEC void *SDLCALL SDL_RenderGetMetalCommandEncoder(SDL_Renderer * renderer); + +/** + * Toggle VSync of the given renderer. + * + * \param renderer The renderer to toggle + * \param vsync 1 for on, 0 for off. All other values are reserved + * \returns a 0 int on success, or non-zero on failure + * + * \since This function is available since SDL 2.0.18. + */ +extern DECLSPEC int SDLCALL SDL_RenderSetVSync(SDL_Renderer* renderer, int vsync); + +/* Ends C function definitions when using C++ */ +#ifdef __cplusplus +} +#endif +#include "close_code.h" + +#endif /* SDL_render_h_ */ + +/* vi: set ts=4 sw=4 expandtab: */ -- cgit 1.4.1