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Preliminary support for blending modes on drawing operations.
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@sunnyps
sunnyps committed Jun 27, 2010
1 parent 30d6668 commit 11cb040
Showing 1 changed file with 32 additions and 11 deletions.
43 changes: 32 additions & 11 deletions src/video/x11/SDL_x11render.c
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Expand Up @@ -102,6 +102,7 @@ typedef struct
Picture pixmap_picts[3];
Picture drawable_pict;
Picture mask_pict;
int blend_op;
XRenderPictFormat* xwindow_pict_fmt;
GC mask_gc;
SDL_bool use_xrender;
Expand Down Expand Up @@ -743,14 +744,27 @@ X11_UnlockTexture(SDL_Renderer * renderer, SDL_Texture * texture)
static int
X11_SetDrawBlendMode(SDL_Renderer * renderer)
{
X11_RenderData *data = (X11_RenderData *) renderer->driverdata;
switch (renderer->blendMode) {
case SDL_BLENDMODE_NONE:
return 0;
#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
data->blend_op = PictOpSrc;
return 0;
case SDL_BLENDMODE_MASK: // Use src pict as mask
data->blend_op = PictOpSrc;
return 0;
case SDL_BLENDMODE_ADD: // PictOpAdd
data->blend_op = PictOpAdd;
return 0;
case SDL_BLENDMODE_BLEND: // PictOpOver
data->blend_op = PictOpOver;
return 0;
/* FIXME case SDL_BLENDMODE_MOD: */
default: // PictOpSrc
SDL_Unsupported();
renderer->blendMode = SDL_BLENDMODE_NONE;
data->blend_op = PictOpSrc;
return -1;
#endif
return 0;
default:
Expand Down Expand Up @@ -840,8 +854,8 @@ X11_RenderDrawPoints(SDL_Renderer * renderer, const SDL_Point * points,
Picture fill =
XRenderCreateSolidFill(data->display, &foreground);

XRenderComposite(data->display, PictOpOver, fill, data->mask_pict, data->drawable_pict,
0, 0, 0, 0, 0, 0, window->w, window->h);
XRenderComposite(data->display, data->blend_op, fill, data->mask_pict,
data->drawable_pict, 0, 0, 0, 0, 0, 0, window->w, window->h);

XRenderFreePicture(data->display, fill);
}
Expand Down Expand Up @@ -1016,8 +1030,8 @@ X11_RenderDrawLines(SDL_Renderer * renderer, const SDL_Point * points,
if(data->use_xrender == SDL_TRUE) {
XRenderColor xrforeground = xrenderdrawcolor(renderer);
Picture fill = XRenderCreateSolidFill(data->display, &xrforeground);
XRenderComposite(data->display, PictOpOver, fill, data->mask_pict, data->drawable_pict,
0, 0, 0, 0, 0, 0, window->w, window->h);
XRenderComposite(data->display, data->blend_op, fill, data->mask_pict,
data->drawable_pict, 0, 0, 0, 0, 0, 0, window->w, window->h);
XRenderFreePicture(data->display, fill);
}
#endif
Expand Down Expand Up @@ -1067,8 +1081,8 @@ X11_RenderDrawRects(SDL_Renderer * renderer, const SDL_Rect ** rects, int count)
XDrawRectangles(data->display, data->mask, data->mask_gc, xrects, xcount);
Picture fill =
XRenderCreateSolidFill(data->display, &foreground);
XRenderComposite(data->display, PictOpOver, fill, data->mask_pict, data->drawable_pict,
0, 0, 0, 0, 0, 0, window->w, window->h);
XRenderComposite(data->display, data->blend_op, fill, data->mask_pict,
data->drawable_pict, 0, 0, 0, 0, 0, 0, window->w, window->h);
XRenderFreePicture(data->display, fill);
}
else
Expand Down Expand Up @@ -1134,8 +1148,8 @@ X11_RenderFillRects(SDL_Renderer * renderer, const SDL_Rect ** rects, int count)
xrects, xcount);
Picture fill =
XRenderCreateSolidFill(data->display, &foreground);
XRenderComposite(data->display, PictOpOver, fill, data->mask_pict, data->drawable_pict,
0, 0, 0, 0, 0, 0, window->w, window->h);
XRenderComposite(data->display, data->blend_op, fill, data->mask_pict,
data->drawable_pict, 0, 0, 0, 0, 0, 0, window->w, window->h);
XRenderFreePicture(data->display, fill);
}
else
Expand Down Expand Up @@ -1392,8 +1406,15 @@ X11_RenderPresent(SDL_Renderer * renderer)
#ifdef SDL_VIDEO_DRIVER_X11_XRENDER
if(data->use_xrender == SDL_TRUE)
{
XRenderComposite(data->display, PictOpOver, data->drawable_pict, None, data->xwindow_pict,
rect->x, rect->y, 0, 0, rect->x, rect->y, rect->w, rect->h);
if(renderer->blendMode == SDL_BLENDMODE_MASK)
XRenderComposite(data->display, data->blend_op, data->drawable_pict,
data->drawable_pict, data->xwindow_pict, rect->x, rect->y,
0, 0, rect->x, rect->y, rect->w, rect->h);
else
XRenderComposite(data->display, data->blend_op, data->drawable_pict, None,
data->xwindow_pict, rect->x, rect->y, 0, 0, rect->x, rect->y,
rect->w, rect->h);

}
else
#endif
Expand Down

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