void vegaMask(VGHandle mask, VGMaskOperation operation,
VGint x, VGint y,
VGint width, VGint height)
{
struct vg_context *ctx = vg_current_context();
if (width <=0 || height <= 0) {
vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
return;
}
if (operation < VG_CLEAR_MASK || operation > VG_SUBTRACT_MASK) {
vg_set_error(ctx, VG_ILLEGAL_ARGUMENT_ERROR);
return;
}
vg_validate_state(ctx);
if (operation == VG_CLEAR_MASK) {
mask_fill(x, y, width, height, 0.f);
} else if (operation == VG_FILL_MASK) {
mask_fill(x, y, width, height, 1.f);
} else if (vg_object_is_valid(mask, VG_OBJECT_IMAGE)) {
struct vg_image *image = handle_to_image(mask);
mask_using_image(image, operation, x, y, width, height);
} else if (vg_object_is_valid(mask, VG_OBJECT_MASK)) {
struct vg_mask_layer *layer = handle_to_masklayer(mask);
mask_using_layer(layer, operation, x, y, width, height);
} else {
vg_set_error(ctx, VG_BAD_HANDLE_ERROR);
}
}
static void
vg_context_update_surface_mask_view(struct vg_context *ctx,
uint width, uint height)
{
struct st_framebuffer *stfb = ctx->draw_buffer;
struct pipe_sampler_view *old_sampler_view = stfb->surface_mask_view;
struct pipe_context *pipe = ctx->pipe;
if (old_sampler_view &&
old_sampler_view->texture->width0 == width &&
old_sampler_view->texture->height0 == height)
return;
/*
we use PIPE_FORMAT_B8G8R8A8_UNORM because we want to render to
this texture and use it as a sampler, so while this wastes some
space it makes both of those a lot simpler
*/
stfb->surface_mask_view = create_tex_and_view(pipe,
PIPE_FORMAT_B8G8R8A8_UNORM, width, height);
if (!stfb->surface_mask_view) {
if (old_sampler_view)
pipe_sampler_view_reference(&old_sampler_view, NULL);
return;
}
/* XXX could this call be avoided? */
vg_validate_state(ctx);
/* alpha mask starts with 1.f alpha */
mask_fill(0, 0, width, height, 1.f);
/* if we had an old surface copy it over */
if (old_sampler_view) {
struct pipe_box src_box;
u_box_origin_2d(MIN2(old_sampler_view->texture->width0,
stfb->surface_mask_view->texture->width0),
MIN2(old_sampler_view->texture->height0,
stfb->surface_mask_view->texture->height0),
&src_box);
pipe->resource_copy_region(pipe,
stfb->surface_mask_view->texture,
0, 0, 0, 0,
old_sampler_view->texture,
0, &src_box);
}
/* Free the old texture
*/
if (old_sampler_view)
pipe_sampler_view_reference(&old_sampler_view, NULL);
}
static void
setup_new_alpha_mask(struct vg_context *ctx, struct st_framebuffer *stfb)
{
struct pipe_context *pipe = ctx->pipe;
struct pipe_sampler_view *old_sampler_view = stfb->alpha_mask_view;
/*
we use PIPE_FORMAT_B8G8R8A8_UNORM because we want to render to
this texture and use it as a sampler, so while this wastes some
space it makes both of those a lot simpler
*/
stfb->alpha_mask_view = create_tex_and_view(pipe,
PIPE_FORMAT_B8G8R8A8_UNORM, stfb->width, stfb->height);
if (!stfb->alpha_mask_view) {
if (old_sampler_view)
pipe_sampler_view_reference(&old_sampler_view, NULL);
return;
}
/* XXX could this call be avoided? */
vg_validate_state(ctx);
/* alpha mask starts with 1.f alpha */
mask_fill(0, 0, stfb->width, stfb->height, 1.f);
/* if we had an old surface copy it over */
if (old_sampler_view) {
struct pipe_subresource subsurf, subold_surf;
subsurf.face = 0;
subsurf.level = 0;
subold_surf.face = 0;
subold_surf.level = 0;
pipe->resource_copy_region(pipe,
stfb->alpha_mask_view->texture,
subsurf,
0, 0, 0,
old_sampler_view->texture,
subold_surf,
0, 0, 0,
MIN2(old_sampler_view->texture->width0,
stfb->alpha_mask_view->texture->width0),
MIN2(old_sampler_view->texture->height0,
stfb->alpha_mask_view->texture->height0));
}
/* Free the old texture
*/
if (old_sampler_view)
pipe_sampler_view_reference(&old_sampler_view, NULL);
}
static void setup_new_alpha_mask(struct vg_context *ctx,
struct st_framebuffer *stfb,
uint width, uint height)
{
struct pipe_context *pipe = ctx->pipe;
struct pipe_texture *old_texture = stfb->alpha_mask;
/*
we use PIPE_FORMAT_A8R8G8B8_UNORM because we want to render to
this texture and use it as a sampler, so while this wastes some
space it makes both of those a lot simpler
*/
stfb->alpha_mask =
create_texture(pipe, PIPE_FORMAT_A8R8G8B8_UNORM, width, height);
if (!stfb->alpha_mask) {
if (old_texture)
pipe_texture_reference(&old_texture, NULL);
return;
}
vg_validate_state(ctx);
/* alpha mask starts with 1.f alpha */
mask_fill(0, 0, width, height, 1.f);
/* if we had an old surface copy it over */
if (old_texture) {
struct pipe_surface *surface = pipe->screen->get_tex_surface(
pipe->screen,
stfb->alpha_mask,
0, 0, 0,
PIPE_BUFFER_USAGE_GPU_WRITE);
struct pipe_surface *old_surface = pipe->screen->get_tex_surface(
pipe->screen,
old_texture,
0, 0, 0,
PIPE_BUFFER_USAGE_GPU_READ);
if (pipe->surface_copy) {
pipe->surface_copy(pipe,
surface,
0, 0,
old_surface,
0, 0,
MIN2(old_surface->width, width),
MIN2(old_surface->height, height));
} else {
util_surface_copy(pipe, FALSE,
surface,
0, 0,
old_surface,
0, 0,
MIN2(old_surface->width, width),
MIN2(old_surface->height, height));
}
if (surface)
pipe_surface_reference(&surface, NULL);
if (old_surface)
pipe_surface_reference(&old_surface, NULL);
}
/* Free the old texture
*/
if (old_texture)
pipe_texture_reference(&old_texture, NULL);
}
