本文整理汇总了C++中IDirectFBSurface::SetDstBlendFunction方法的典型用法代码示例。如果您正苦于以下问题：C++ IDirectFBSurface::SetDstBlendFunction方法的具体用法？C++ IDirectFBSurface::SetDstBlendFunction怎么用？C++ IDirectFBSurface::SetDstBlendFunction使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类IDirectFBSurface的用法示例。
在下文中一共展示了IDirectFBSurface::SetDstBlendFunction方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: switch
static void
SetBlendMode(DirectFB_RenderData * data, int blendMode,
DirectFB_TextureData * source)
{
IDirectFBSurface *destsurf = get_dfb_surface(data->window);
//FIXME: check for format change
if (1 || data->lastBlendMode != blendMode) {
switch (blendMode) {
case SDL_BLENDMODE_NONE:
/**< No blending */
data->blitFlags = DSBLIT_NOFX;
data->drawFlags = DSDRAW_NOFX;
SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_ONE));
SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_ZERO));
break;
#if 0
case SDL_BLENDMODE_MASK:
data->blitFlags = DSBLIT_BLEND_ALPHACHANNEL;
data->drawFlags = DSDRAW_BLEND;
SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_SRCALPHA));
SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_INVSRCALPHA));
break;
#endif
case SDL_BLENDMODE_BLEND:
data->blitFlags = DSBLIT_BLEND_ALPHACHANNEL;
data->drawFlags = DSDRAW_BLEND;
SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_SRCALPHA));
SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_INVSRCALPHA));
break;
case SDL_BLENDMODE_ADD:
data->blitFlags = DSBLIT_BLEND_ALPHACHANNEL;
data->drawFlags = DSDRAW_BLEND;
// FIXME: SRCALPHA kills performance on radeon ...
// It will be cheaper to copy the surface to
// a temporay surface and premultiply
if (source && TextureHasAlpha(source))
SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_SRCALPHA));
else
SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_ONE));
SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_ONE));
break;
case SDL_BLENDMODE_MOD:
data->blitFlags = DSBLIT_BLEND_ALPHACHANNEL;
data->drawFlags = DSDRAW_BLEND;
//SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_DESTCOLOR));
//SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_ZERO));
//data->glBlendFunc(GL_ZERO, GL_SRC_COLOR);
SDL_DFB_CHECK(destsurf->SetSrcBlendFunction(destsurf, DSBF_ZERO));
SDL_DFB_CHECK(destsurf->SetDstBlendFunction(destsurf, DSBF_SRCCOLOR));
break;
}
data->lastBlendMode = blendMode;
}
}示例2: Render
/* render callback */
virtual void Render( IDirectFBSurface &surface ) {
surface.Clear( 0, 0, 255, 255 );
surface.SetFont( font );
surface.SetColor( 0, 0, 0, 255 );
surface.SetSrcBlendFunction( DSBF_INVSRCALPHA );
surface.SetDstBlendFunction( DSBF_INVSRCALPHA );
surface.DrawString( "Test Text", -1, 10, 10, (DFBSurfaceTextFlags)(DSTF_TOPLEFT | DSTF_BLEND_FUNCS) );
}示例3: LoadFont
void
DirectFB_WM_RedrawLayout(_THIS, SDL_Window * window)
{
SDL_DFB_WINDOWDATA(window);
IDirectFBSurface *s = windata->window_surface;
DFB_Theme *t = &windata->theme;
int i;
int d = (t->caption_size - t->font_size) / 2;
int x, y, w;
if (!windata->is_managed || (window->flags & SDL_WINDOW_FULLSCREEN))
return;
SDL_DFB_CHECK(s->SetSrcBlendFunction(s, DSBF_ONE));
SDL_DFB_CHECK(s->SetDstBlendFunction(s, DSBF_ZERO));
SDL_DFB_CHECK(s->SetDrawingFlags(s, DSDRAW_NOFX));
SDL_DFB_CHECK(s->SetBlittingFlags(s, DSBLIT_NOFX));
LoadFont(_this, window);
/* s->SetDrawingFlags(s, DSDRAW_BLEND); */
s->SetColor(s, COLOR_EXPAND(t->frame_color));
/* top */
for (i = 0; i < t->top_size; i++)
s->DrawLine(s, 0, i, windata->size.w, i);
/* bottom */
for (i = windata->size.h - t->bottom_size; i < windata->size.h; i++)
s->DrawLine(s, 0, i, windata->size.w, i);
/* left */
for (i = 0; i < t->left_size; i++)
s->DrawLine(s, i, 0, i, windata->size.h);
/* right */
for (i = windata->size.w - t->right_size; i < windata->size.w; i++)
s->DrawLine(s, i, 0, i, windata->size.h);
/* Caption */
s->SetColor(s, COLOR_EXPAND(t->caption_color));
s->FillRectangle(s, t->left_size, t->top_size, windata->client.w,
t->caption_size);
/* Close Button */
w = t->caption_size;
x = windata->size.w - t->right_size - w + d;
y = t->top_size + d;
s->SetColor(s, COLOR_EXPAND(t->close_color));
DrawTriangle(s, 1, x, y, w - 2 * d);
/* Max Button */
s->SetColor(s, COLOR_EXPAND(t->max_color));
DrawTriangle(s, window->flags & SDL_WINDOW_MAXIMIZED ? 1 : 0, x - w,
y, w - 2 * d);
/* Caption */
if (*window->title) {
s->SetColor(s, COLOR_EXPAND(t->font_color));
DrawCraption(_this, s, (x - w) / 2, t->top_size + d, window->title);
}
/* Icon */
if (windata->icon) {
DFBRectangle dr;
dr.x = t->left_size + d;
dr.y = t->top_size + d;
dr.w = w - 2 * d;
dr.h = w - 2 * d;
s->SetBlittingFlags(s, DSBLIT_BLEND_ALPHACHANNEL);
s->StretchBlit(s, windata->icon, NULL, &dr);
}
windata->wm_needs_redraw = 0;
}