//-------------------------------------------------
// render_triangle - render a triangle that
// is used for up/down arrows and left/right
// indicators
//-------------------------------------------------
static void render_triangle(bitmap_argb32 dest, bitmap_argb32 source, rectangle sbounds, object param) //void *param)
{
int halfwidth = dest.width() / 2;
int height = dest.height();
int x, y;
// start with all-transparent
dest.fill(new rgb_t(0x00, 0x00, 0x00, 0x00));
// render from the tip to the bottom
for (y = 0; y < height; y++)
{
int linewidth = (y * (halfwidth - 1) + (height / 2)) * 255 * 2 / height;
//uint32_t *target = &dest.pix32(y, halfwidth);
RawBuffer targetBuf;
UInt32 targetOffset = dest.pix32(out targetBuf, y, halfwidth);
// don't antialias if height < 12
if (dest.height() < 12)
{
int pixels = (linewidth + 254) / 255;
if (pixels % 2 == 0)
{
pixels++;
}
linewidth = pixels * 255;
}
// loop while we still have data to generate
for (x = 0; linewidth > 0; x++)
{
int dalpha;
// first column we only consume one pixel
if (x == 0)
{
dalpha = Math.Min(0xff, linewidth);
targetBuf.set_uint32((int)targetOffset + x, new rgb_t((byte)dalpha, 0xff, 0xff, 0xff)); //target[x] = new rgb_t(dalpha, 0xff, 0xff, 0xff);
}
// remaining columns consume two pixels, one on each side
else
{
dalpha = Math.Min(0x1fe, linewidth);
targetBuf.set_uint32((int)targetOffset + x, new rgb_t((byte)(dalpha / 2), 0xff, 0xff, 0xff)); //target[x] = target[-x] = new rgb_t((byte)(dalpha / 2), 0xff, 0xff, 0xff);
targetBuf.set_uint32((int)targetOffset + (-x), new rgb_t((byte)(dalpha / 2), 0xff, 0xff, 0xff));
}
// account for the weight we consumed */
linewidth -= dalpha;
}
}
}
//-------------------------------------------------
// render_triangle - render a triangle that
// is used for up/down arrows and left/right
// indicators
//-------------------------------------------------
static void render_triangle(bitmap_argb32 dest, bitmap_argb32 source, rectangle sbounds, object param) //void *param)
{
int halfwidth = dest.width() / 2;
int height = dest.height();
// start with all-transparent
dest.fill(new rgb_t(0x00, 0x00, 0x00, 0x00));
// render from the tip to the bottom
for (int y = 0; y < height; y++)
{
int linewidth = (y * (halfwidth - 1) + (height / 2)) * 255 * 2 / height;
PointerU32 target = dest.pix(y, halfwidth); //uint32_t *const target = &dest.pix(y, halfwidth);
// don't antialias if height < 12
if (dest.height() < 12)
{
int pixels = (linewidth + 254) / 255;
if (pixels % 2 == 0)
{
pixels++;
}
linewidth = pixels * 255;
}
// loop while we still have data to generate
for (int x = 0; linewidth > 0; x++)
{
int dalpha;
if (x == 0)
{
// first column we only consume one pixel
dalpha = std.min(0xff, linewidth);
target[x] = new rgb_t((uint8_t)dalpha, 0xff, 0xff, 0xff); //target[x] = rgb_t(dalpha, 0xff, 0xff, 0xff);
}
else
{
// remaining columns consume two pixels, one on each side
dalpha = std.min(0x1fe, linewidth);
target[x] = target[-x] = new rgb_t((uint8_t)(dalpha / 2), 0xff, 0xff, 0xff); //target[x] = target[-x] = rgb_t(dalpha / 2, 0xff, 0xff, 0xff);
}
// account for the weight we consumed
linewidth -= dalpha;
}
}
}