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Fixed bug 4914 - Expose SDL_ScaleMode and add SDL_SetTextureScaleMode/SDL_GetTextureScaleMode

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Konrad

This was something rather trivial to add, but asked at least several times before (I did google about it as well).

It should be possible to dynamically change scaling mode of the texture. It is actually trivial task, but until now it was only possible with a hint before creating a texture.

I needed it for my game as well, so I took the liberty of writing it myself.

This patch adds following functions:

SDL_SetTextureScaleMode(SDL_Texture * texture, SDL_ScaleMode scaleMode);
SDL_GetTextureScaleMode(SDL_Texture * texture, SDL_ScaleMode *scaleMode);

That way you can change texture scaling on the fly.
This commit is contained in:
Sam Lantinga 2019-12-22 13:39:44 -08:00
parent f0cee3edec
commit 5e19e66c73
14 changed files with 212 additions and 7 deletions
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39
include/SDL_render.h
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@ -85,6 +85,16 @@ typedef struct SDL_RendererInfo
int max_texture_height; /**< The maximum texture height */
} SDL_RendererInfo;
/**
* \brief The scaling mode for a texture.
*/
typedef enum
{
SDL_ScaleModeNearest, /**< nearest pixel sampling */
SDL_ScaleModeLinear, /**< linear filtering */
SDL_ScaleModeBest /**< anisotropic filtering */
} SDL_ScaleMode;
/**
* \brief The access pattern allowed for a texture.
*/
@ -366,6 +376,35 @@ extern DECLSPEC int SDLCALL SDL_SetTextureBlendMode(SDL_Texture * texture,
extern DECLSPEC int SDLCALL SDL_GetTextureBlendMode(SDL_Texture * texture,
SDL_BlendMode *blendMode);
/**
* \brief Set the scale mode used for texture scale operations.
*
* \param texture The texture to update.
* \param scaleMode ::SDL_ScaleMode to use for texture scaling.
*
* \return 0 on success, or -1 if the texture is not valid.
*
* \note If the scale mode is not supported, the closest supported mode is
* chosen.
*
* \sa SDL_GetTextureScaleMode()
*/
extern DECLSPEC int SDLCALL SDL_SetTextureScaleMode(SDL_Texture * texture,
SDL_ScaleMode scaleMode);
/**
* \brief 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.
*
* \sa SDL_SetTextureScaleMode()
*/
extern DECLSPEC int SDLCALL SDL_GetTextureScaleMode(SDL_Texture * texture,
SDL_ScaleMode *scaleMode);
/**
* \brief Update the given texture rectangle with new pixel data.
*