efl

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#include "draw_private.h"
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/** default op: d = d*(1-sa) + s */
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static void
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_alpha_func_blend(uint8_t *dst, const uint8_t *src, int len)
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{
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   int k;
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   EINA_SAFETY_ON_NULL_RETURN(src);
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   EINA_SAFETY_ON_NULL_RETURN(dst);
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   for (k = len; k; k--)
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     {
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        int val = (*dst * (255 - *src)) / 255 + *src;
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        *dst++ = val;
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        src++;
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     }
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}
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/** d = s */
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static void
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_alpha_func_copy(uint8_t *dst, const uint8_t *src, int len)
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{
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   EINA_SAFETY_ON_NULL_RETURN(src);
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   EINA_SAFETY_ON_NULL_RETURN(dst);
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   memcpy(dst, src, len);
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}
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/** d = d*s */
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static void
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_alpha_func_mul(uint8_t *dst, const uint8_t *src, int len)
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{
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   int k;
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   EINA_SAFETY_ON_NULL_RETURN(src);
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   EINA_SAFETY_ON_NULL_RETURN(dst);
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   for (k = len; k; k--)
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     {
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        int val = (*dst * *src) / 255;
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        *dst++ = val;
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        src++;
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     }
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}
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Draw_Func_Alpha
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efl_draw_alpha_func_get(Efl_Gfx_Render_Op op, Eina_Bool has_mask)
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{
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   if (!has_mask)
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     {
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        if (op == EFL_GFX_RENDER_OP_BLEND)
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          return _alpha_func_blend;
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        else
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          return _alpha_func_copy;
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     }
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   else
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     return _alpha_func_mul;
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}
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