/********************************************************************************************
> void BitmapExportPaletteControl::Render(ReDrawInfoType *pInfo)
Author: Jonathan_Payne (Xara Group Ltd) <*****@*****.**>
Created: 19/12/2000
Returns: Draw the palette. This assumes that the pInfo struct contains a DC to draw
with.
********************************************************************************************/
void BitmapExportPaletteControl::Render(ReDrawInfoType *pInfo)
{
DocRect PaletteSize(0, 0, pInfo->dx, pInfo->dy);
// Create a RenderRegion so that we can draw the control
RenderRegion *pRender = CreateOSRenderRegion(&PaletteSize, pInfo);
if (pRender == 0)
return; // Could not create a RenderRegion
// Decide if we are going to render the palette
if (!m_Palette.GetNumberOfColours())
{
// We are not rendering a palette so just draw a grey box
RenderGrey(&PaletteSize, pRender);
}
else
{
// Check the selection and mouse over colour are valid
if (m_SelectedCell > m_Palette.GetNumberOfColours())
m_SelectedCell = INVALID_COLOUR_VALUE;
if (m_MouseOverCell > m_Palette.GetNumberOfColours())
m_MouseOverCell = INVALID_COLOUR_VALUE;
// We are rendering a full palette
RenderPalette(&PaletteSize, pRender, pInfo->dy, pInfo->pClipRect);
}
DestroyOSRenderRegion(pRender);
}
static void
Draw(void *obj)
{
AG_HSVPal *pal = obj;
float cur_h, cur_s, cur_v;
Uint8 r, g, b, a;
int x, y;
if (pal->surface == NULL) {
if ((pal->surface = AG_SurfaceStdGL(WIDTH(pal), HEIGHT(pal)))
== NULL) {
return;
}
pal->surfaceId = AG_WidgetMapSurface(pal, pal->surface);
}
if (pal->flags & AG_HSVPAL_DIRTY) {
pal->flags &= ~(AG_HSVPAL_DIRTY);
RenderPalette(pal);
AG_WidgetUpdateSurface(pal, pal->surfaceId);
}
cur_h = (AG_GetFloat(pal, "hue") / 360.0) * 2*AG_PI;
cur_s = AG_GetFloat(pal, "saturation");
cur_v = AG_GetFloat(pal, "value");
a = (Uint8)(AG_GetFloat(pal, "alpha")*255);
AG_WidgetBlitFrom(pal, pal, pal->surfaceId, NULL, 0, 0);
/* Indicate the current selection. */
AG_DrawCircle(pal,
pal->circle.x + (pal->circle.rin + pal->circle.width/2)*Cos(cur_h),
pal->circle.y + (pal->circle.rin + pal->circle.width/2)*Sin(cur_h),
pal->selcircle_r,
AG_ColorRGB(0,0,0));
/* The rendering routine uses (v = 1 - x/h), so (x = -v*h + h). */
y = (int)((1.0 - cur_s) * (float)pal->triangle.h);
x = (int)(-(cur_v*(float)pal->triangle.h - (float)pal->triangle.h));
if (x < 0) { x = 0; }
if (x > y) { x = y; }
AG_DrawCircle(pal,
pal->triangle.x + x - y/2,
pal->triangle.y + y,
pal->selcircle_r,
AG_ColorRGB(0,0,0));
x = a*pal->rAlpha.w/255;
if (x > pal->rAlpha.w-3) { x = pal->rAlpha.w-3; }
AG_HSV2RGB((cur_h*360.0)/(2*AG_PI), cur_s, cur_v, &r, &g, &b);
/* Draw the color preview. */
if (!(pal->flags & AG_HSVPAL_NOPREVIEW)) {
AG_DrawRectFilled(pal,
AG_RECT(pal->rAlpha.x, pal->rAlpha.y, pal->rAlpha.w, 8),
AG_ColorRGB(r,g,b));
}
/* Draw the transparency color preview. */
if (!(pal->flags & AG_HSVPAL_NOALPHA)) {
AG_DrawLineV(pal,
pal->rAlpha.x + x,
pal->rAlpha.y + 1,
pal->rAlpha.y + pal->rAlpha.h,
AG_ColorRGBA(0,0,0,0));
AG_DrawLineV(pal,
pal->rAlpha.x + x + 1,
pal->rAlpha.y + 1,
pal->rAlpha.y + pal->rAlpha.h,
AG_ColorRGBA(240,240,240,0));
AG_DrawLineV(pal,
pal->rAlpha.x + x + 2,
pal->rAlpha.y + 1,
pal->rAlpha.y + pal->rAlpha.h,
AG_ColorRGBA(0,0,0,0));
}
/* Display RGB/HSV values */
if (pal->flags & (AG_HSVPAL_SHOW_RGB|AG_HSVPAL_SHOW_HSV)) {
AG_Surface *s;
/* XXX inefficient */
AG_PushTextState();
AG_TextBGColorRGB(0,0,0);
AG_TextColorRGB(255,255,255);
if ((pal->flags & AG_HSVPAL_SHOW_RGB) &&
(pal->flags & AG_HSVPAL_SHOW_HSV)) {
s = AG_TextRenderf(
"RGB: %u,%u,%u\n"
"HSV: %.02f,%.02f,%.02f",
r, g, b,
(cur_h*360.0)/(2.0*AG_PI),
cur_s, cur_v);
} else if (pal->flags & AG_HSVPAL_SHOW_RGB) {
s = AG_TextRenderf("RGB: %u,%u,%u", r, g, b);
} else {
s = AG_TextRenderf("HSV: %.01f,%.02f,%.02f",
(cur_h*360.0)/(2.0*AG_PI),
cur_s, cur_v);
}
AG_WidgetBlit(pal, s,
WIDTH(pal)/2 - s->w/2,
pal->rAlpha.y + pal->rAlpha.h/2 - s->h/2);
AG_SurfaceFree(s);
AG_PopTextState();
}
}
