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SDL_GetSurfaceBlendMode

Use this function to get the blend mode used for blit operations.

Syntax

int SDL_GetSurfaceBlendMode(SDL_Surface*   surface,
                            SDL_BlendMode* blendMode)

Function Parameters

surface

the SDL_Surface structure to query

blendMode

a pointer filled in with the current SDL_BlendMode; see Remarks for details

Return Value

Returns 0 on success or a negative error code on failure; call SDL_GetError() for more information.

Code Examples

You can add your code example here

Remarks

blendMode will be filled in with one of the following:

SDL_BLENDMODE_NONE

no blending

dstRGBA = srcRGBA

SDL_BLENDMODE_BLEND

alpha blending

dstRGB = (srcRGB * srcA) + (dstRGB * (1-srcA))

dstA = srcA + (dstA * (1-srcA))

SDL_BLENDMODE_ADD

additive blending

dstRGB = (srcRGB * srcA) + dstRGB

dstA = dstA

SDL_BLENDMODE_MOD

color modulate

dstRGB = srcRGB * dstRGB

dstA = dstA


CategoryAPI, CategorySurface

None: SDL_GetSurfaceBlendMode (last edited 2011-01-04 00:34:29 by SheenaSmith)

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