Alpha Value ignored for ESD_Circle_Line

[qwerty100]

I' using EveScreenDesigner 4.8RC2

When setting the alpha value on an ESD_Circle_Line widget I see no effect.

Should blending be possible for a CircleLine?  Note a normal ESD_Circle renders correctly with the alpha value taken into consideration.

Thanks

[BRT Community]

Hello,

Currently there is no possibility for blending with the Circle Line in ESD.
I will pass this on to the dev team so they can either remove the option or update the capabilities of the widget.

Best Regards,
BRT Community

[pauljiao]

You can try to update the file "Ft_Esd_CircleLine.c" under "Libraries\Ft_Esd_Widgets" folder of ESD installation path with the following content:
It will enable the alpha property of ESD circle line widget after you reboot the ESD.

#include "Ft_Esd.h"
#include "Ft_Esd_Dl.h"
#include "Ft_Esd_CircleLine.h"

extern Ft_Gpu_Hal_Context_t *Ft_Esd_Host;

void Ft_Esd_CircleLine_SetDSTAlpha();
void Ft_Esd_CircleLine_ClearDSTAlpha();
void Ft_Esd_CircleLine_Draw_Point(int x, int y, int radius);
void Ft_Esd_CircleLine_Draw_Point_Float(ft_float_t x, ft_float_t y, ft_float_t radius);
void Ft_Esd_CircleLine_Draw_Square(int x, int y, int side);

ESD_METHOD(Ft_Esd_CircleLine_Render_Func, Context = Ft_Esd_CircleLine)
ESD_PARAMETER(x, Type = int)
ESD_PARAMETER(y, Type = int)
ESD_PARAMETER(radius, Type = int)
ESD_PARAMETER(border, Type = int)
ESD_PARAMETER(color, Type = ft_argb32_t)
void Ft_Esd_CircleLine_Render_Func(Ft_Esd_CircleLine *context, int x, int y, int radius, int border, ft_argb32_t color);

void Ft_Esd_CircleLine_Render_Func(Ft_Esd_CircleLine *context, int x, int y, int radius, int border, ft_argb32_t color)
{
   if (radius < 0)
      return;
   int a = ((color & 0xFF000000)) >> 24;
   int r = ((color & 0x00FF0000)) >> 16;
   int g = ((color & 0x0000FF00)) >> 8;
   int b = ((color & 0x000000FF));
   int innerRadius = radius - border;
   if (innerRadius < 0)
      innerRadius = 0;

   Ft_Esd_Primitive = 0;
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, SAVE_CONTEXT());

   Ft_Esd_Rect16 scissor = Ft_Esd_Rect16_Crop(context->Widget.GlobalRect, Ft_Esd_Dl_Scissor_Get());
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, SCISSOR_XY(scissor.X, scissor.Y));
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, SCISSOR_SIZE(scissor.Width, scissor.Height));
   
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, COLOR_MASK(0, 0, 0, 1));

    //Draw the rectangle covering whole circle with alpha value 0
   Ft_Esd_CircleLine_ClearDSTAlpha();   
   Ft_Esd_CircleLine_Draw_Square(x - radius - 1, y - radius - 1, (radius * 2) + 2);
   
   //Draw outer circle with desired alpha value
    Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, COLOR_A(a));
   Ft_Esd_CircleLine_SetDSTAlpha();
   Ft_Esd_CircleLine_Draw_Point(x, y, radius);
   
   //Draw inner circle with alpha value 0
   Ft_Esd_CircleLine_ClearDSTAlpha();   
   if (innerRadius > 0)
   {
      Ft_Esd_CircleLine_Draw_Point(x, y, innerRadius);
   }

   // Finally draw final color 
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, COLOR_RGB(r, g, b));
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, COLOR_A(a));
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, COLOR_MASK(1, 1, 1, 1));
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, BLEND_FUNC(DST_ALPHA, ONE_MINUS_DST_ALPHA));
   Ft_Esd_CircleLine_Draw_Square(x - radius, y - radius, radius * 2);

   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, RESTORE_CONTEXT());
}

void Ft_Esd_CircleLine_SetDSTAlpha()
{
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, BLEND_FUNC(SRC_ALPHA, ZERO));
}

void Ft_Esd_CircleLine_ClearDSTAlpha()
{
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, BLEND_FUNC(ZERO, ZERO));
}

void Ft_Esd_CircleLine_Draw_Square(int x, int y, int side)
{
#if (EVE_MODEL >= EVE_FT810)
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, VERTEX_FORMAT(4));
#endif
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, BEGIN(RECTS));
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, LINE_WIDTH(16));
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, VERTEX2F((x * 16), (y * 16)));
   x += side;
   y += side;
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, VERTEX2F((x * 16), (y * 16)));
   // Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, END());
}

void Ft_Esd_CircleLine_Draw_Point(int x, int y, int radius)
{
   Ft_Esd_CircleLine_Draw_Point_Float((ft_float_t)x, (ft_float_t)y, (ft_float_t)radius);
}

// FIXME: Use ft_int16_f4_t as fixed point instead of float
void Ft_Esd_CircleLine_Draw_Point_Float(ft_float_t x, ft_float_t y, ft_float_t radius)
{
#if (EVE_MODEL >= EVE_FT810)
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, VERTEX_FORMAT(4));
#endif
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, BEGIN(FTPOINTS));
   int iR = (radius * 16.0f) + 0.5f;
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, POINT_SIZE(iR));
   int iX = (x * 16.0f) + 0.5f;
   int iY = (y * 16.0f) + 0.5f;
   Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, VERTEX2F(iX, iY));
   // Ft_Gpu_CoCmd_SendCmd(Ft_Esd_Host, END());
}