Merge pull request #3 from suve/add-missing-blend-enums

Add missing blend enums

Author: Free-Pascal-meets-SDL-Website

sdlblendmode.inc

@@ -13,3 +13,48 @@ const
   SDL_BLENDMODE_BLEND = $00000001;    {**< dst = (src * A) + (dst * (1-A)) *}
   SDL_BLENDMODE_ADD   = $00000002;    {**< dst = (src * A) + dst *}
   SDL_BLENDMODE_MOD   = $00000004;    {**< dst = src * dst *}
+
+type
+  PSDL_BlendOperation = ^TSDL_BlendOperation;
+  TSDL_BlendOperation = DWord;
+
+const
+  SDL_BLENDOPERATION_ADD              = $1;  {**< dst + src: supported by all renderers *}
+  SDL_BLENDOPERATION_SUBTRACT         = $2;  {**< dst - src : supported by D3D9, D3D11, OpenGL, OpenGLES}
+  SDL_BLENDOPERATION_REV_SUBTRACT     = $3;  {**< src - dst : supported by D3D9, D3D11, OpenGL, OpenGLES}
+  SDL_BLENDOPERATION_MINIMUM          = $4;  {**< min(dst, src) : supported by D3D11 *}
+  SDL_BLENDOPERATION_MAXIMUM          = $5;  {**< max(dst, src) : supported by D3D11 *}
+
+type
+  PSDL_BlendFactor = ^TSDL_BlendFactor;
+  TSDL_BlendFactor = DWord;
+
+const
+  SDL_BLENDFACTOR_ZERO                = $1;  {**< 0, 0, 0, 0 *}
+  SDL_BLENDFACTOR_ONE                 = $2;  {**< 1, 1, 1, 1 *}
+  SDL_BLENDFACTOR_SRC_COLOR           = $3;  {**< srcR, srcG, srcB, srcA *}
+  SDL_BLENDFACTOR_ONE_MINUS_SRC_COLOR = $4;  {**< 1-srcR, 1-srcG, 1-srcB, 1-srcA *}
+  SDL_BLENDFACTOR_SRC_ALPHA           = $5;  {**< srcA, srcA, srcA, srcA *}
+  SDL_BLENDFACTOR_ONE_MINUS_SRC_ALPHA = $6;  {**< 1-srcA, 1-srcA, 1-srcA, 1-srcA *}
+  SDL_BLENDFACTOR_DST_COLOR           = $7;  {**< dstR, dstG, dstB, dstA *}
+  SDL_BLENDFACTOR_ONE_MINUS_DST_COLOR = $8;  {**< 1-dstR, 1-dstG, 1-dstB, 1-dstA *}
+  SDL_BLENDFACTOR_DST_ALPHA           = $9;  {**< dstA, dstA, dstA, dstA *}
+  SDL_BLENDFACTOR_ONE_MINUS_DST_ALPHA = $A;  {**< 1-dstA, 1-dstA, 1-dstA, 1-dstA *}
+
+{**
+ *  \brief Create a custom blend mode, which may or may not be supported by a given renderer
+ *
+ *  \param srcColorFactor source color factor
+ *  \param dstColorFactor destination color factor
+ *  \param colorOperation color operation
+ *  \param srcAlphaFactor source alpha factor
+ *  \param dstAlphaFactor destination alpha factor
+ *  \param alphaOperation alpha operation
+ *
+ *  The result of the blend mode operation will be:
+ *      dstRGB = dstRGB * dstColorFactor colorOperation srcRGB * srcColorFactor
+ *  and
+ *      dstA = dstA * dstAlphaFactor alphaOperation srcA * srcAlphaFactor
+ *}
+Function SDL_ComposeCustomBlendMode(srcColorFactor, dstColorFactor : TSDL_BlendFactor; colorOperation : TSDL_BlendOperation; srcAlphaFactor, dstAlphaFactor : TSDL_BlendFactor; alphaOperation : TSDL_BlendOperation) : TSDL_BlendMode cdecl;
+  external SDL_LibName {$IFDEF DELPHI} {$IFDEF MACOS} name '_SDL_ComposeCustomBlendMode' {$ENDIF} {$ENDIF};