/**
* meta_background_actor_set_visible_region:
* @self: a #MetaBackgroundActor
* @visible_region: (allow-none): the area of the actor (in allocate-relative
* coordinates) that is visible.
*
* Sets the area of the background that is unobscured by overlapping windows.
* This is used to optimize and only paint the visible portions.
*/
void
meta_background_actor_set_visible_region (MetaBackgroundActor *self,
cairo_region_t *visible_region)
{
MetaBackgroundActorPrivate *priv;
g_return_if_fail (META_IS_BACKGROUND_ACTOR (self));
priv = self->priv;
if (priv->visible_region)
{
cairo_region_destroy (priv->visible_region);
priv->visible_region = NULL;
}
if (visible_region)
{
cairo_rectangle_int_t screen_rect = { 0 };
meta_screen_get_size (priv->background->screen, &screen_rect.width, &screen_rect.height);
/* Doing the intersection here is probably unnecessary - MetaWindowGroup
* should never compute a visible area that's larger than the root screen!
* but it's not that expensive and adds some extra robustness.
*/
priv->visible_region = cairo_region_create_rectangle (&screen_rect);
cairo_region_intersect (priv->visible_region, visible_region);
}
}
static cairo_region_t *
byzanz_layer_cursor_snapshot (ByzanzLayer *layer)
{
ByzanzLayerCursor *clayer = BYZANZ_LAYER_CURSOR (layer);
cairo_region_t *region, *area;
int x, y;
GdkDevice *device;
GdkDeviceManager *device_manager;
GdkDisplay *display;
GdkWindow *window;
window = layer->recorder->window;
display = gdk_window_get_display (window);
device_manager = gdk_display_get_device_manager (display);
device = gdk_device_manager_get_client_pointer (device_manager);
gdk_window_get_device_position (window, device, &x, &y, NULL);
if (x == clayer->cursor_x &&
y == clayer->cursor_y &&
clayer->cursor_next == clayer->cursor)
return NULL;
region = cairo_region_create ();
byzanz_recorder_invalidate_cursor (region, clayer->cursor, clayer->cursor_x, clayer->cursor_y);
byzanz_recorder_invalidate_cursor (region, clayer->cursor_next, x, y);
area = cairo_region_create_rectangle (&layer->recorder->area);
cairo_region_intersect (region, area);
cairo_region_destroy (area);
clayer->cursor = clayer->cursor_next;
clayer->cursor_x = x;
clayer->cursor_y = y;
byzanz_layer_cursor_setup_poll (clayer);
return region;
}
/**
* meta_background_actor_get_clip_region:
* @self: a #MetaBackgroundActor
*
* Return value (transfer full): a #cairo_region_t that represents the part of
* the background not obscured by other #MetaBackgroundActor or
* #MetaWindowActor objects.
*/
cairo_region_t *
meta_background_actor_get_clip_region (MetaBackgroundActor *self)
{
MetaBackgroundActorPrivate *priv = self->priv;
ClutterActorBox content_box;
cairo_rectangle_int_t content_area = { 0 };
cairo_region_t *clip_region;
g_return_val_if_fail (META_IS_BACKGROUND_ACTOR (self), NULL);
if (!priv->clip_region)
return NULL;
clutter_actor_get_content_box (CLUTTER_ACTOR (self), &content_box);
content_area.x = content_box.x1;
content_area.y = content_box.y1;
content_area.width = content_box.x2 - content_box.x1;
content_area.height = content_box.y2 - content_box.y1;
clip_region = cairo_region_create_rectangle (&content_area);
cairo_region_intersect (clip_region, priv->clip_region);
return clip_region;
}
// cairo_public cairo_status_t
// cairo_region_intersect (cairo_region_t *dst, const cairo_region_t *other);
static int l_cairo_region_intersect (lua_State* L)
{
cairo_region_t *dst = get_cairo_region_t (L, 1);
const cairo_region_t *other = get_cairo_region_t (L, 2);
cairo_status_t v = cairo_region_intersect (dst, other);
lua_pushinteger(L, v);
return 1;
}
static cairo_int_status_t
_cairo_clip_path_to_region (cairo_clip_path_t *clip_path)
{
cairo_int_status_t status;
cairo_region_t *prev = NULL;
if (clip_path->flags &
(CAIRO_CLIP_PATH_HAS_REGION |
CAIRO_CLIP_PATH_REGION_IS_UNSUPPORTED))
{
return clip_path->flags & CAIRO_CLIP_PATH_REGION_IS_UNSUPPORTED ?
CAIRO_INT_STATUS_UNSUPPORTED :
CAIRO_STATUS_SUCCESS;
}
if (! clip_path->path.maybe_fill_region)
return _cairo_clip_path_to_region_geometric (clip_path);
/* first retrieve the region for our antecedents */
if (clip_path->prev != NULL) {
status = _cairo_clip_path_to_region (clip_path->prev);
if (status) {
if (status == CAIRO_INT_STATUS_UNSUPPORTED)
return _cairo_clip_path_to_region_geometric (clip_path);
return status;
}
prev = clip_path->prev->region;
}
/* now extract the region for ourselves */
clip_path->region =
_cairo_path_fixed_fill_rectilinear_to_region (&clip_path->path,
clip_path->fill_rule,
&clip_path->extents);
assert (clip_path->region != NULL);
status = clip_path->region->status;
if (unlikely (status))
return status;
if (prev != NULL) {
status = cairo_region_intersect (clip_path->region, prev);
if (unlikely (status))
return status;
}
clip_path->flags |= CAIRO_CLIP_PATH_HAS_REGION;
return CAIRO_STATUS_SUCCESS;
}
JOY_GNUC_HOT
static void
submit(JoyScreen *self)
{
struct Private *priv = GET_PRIVATE(self);
// update cursor
if (priv->cursor && priv->moved) {
GFX3D_Cursor_Position_Set(priv->cursor,
priv->x - priv->x_hot,
priv->y - priv->y_hot);
}
// clear exposed areas of the frame buffer
cairo_region_intersect(priv->expose, priv->area);
for (gint i = 0; i < cairo_region_num_rectangles(priv->expose); ++i) {
cairo_rectangle_int_t rect;
cairo_region_get_rectangle(priv->expose, i, &rect);
GFX3D_Display_ClearAlpha2D(priv->display, NULL,
(gpointer)&rect, 0., 0., 0., 0.);
g_array_append_val(priv->rects, rect);
}
if (priv->rects->len) {
cairo_region_subtract(priv->expose, priv->expose);
#if !CAIRO_HAS_GFX3D_SURFACE
GFX3D_Display_Cache_Flush(priv->display);
#endif // !CAIRO_HAS_GFX3D_SURFACE
GFX3D_NATIVE_Display display =
GFX3D_Display_Get_NATIVE_Display(priv->display);
GFX3D_NATIVE_Surface surface =
GFX3D_Display_FrameBuffer_Get_NATIVE_Surface(
priv->display);
// copy windows to the frame buffer
for (GList *node = g_queue_peek_head_link(priv->windows);
node; node = node->next) {
JoyBubble *window = node->data;
joy_gfx3d_window_submit(window, display, surface,
priv->area);
}
// flip the display
GFX3D_Display_Show_Partial(priv->display,
(gpointer)priv->rects->data,
priv->rects->len, 1);
g_array_set_size(priv->rects, 0);
} else {
if (priv->moved && priv->cursor) {
GFX3D_Display_Show_Ch_Reload(priv->cursor);
}
}
priv->moved = FALSE;
}
bool wxRegion::DoIntersect( const wxRegion& region )
{
if (region.m_refData == NULL || m_refData == NULL)
return false;
AllocExclusive();
#ifdef __WXGTK3__
cairo_region_intersect(M_REGIONDATA->m_region, M_REGIONDATA_OF(region)->m_region);
#else
gdk_region_intersect( M_REGIONDATA->m_region, region.GetRegion() );
#endif
return true;
}
/**
* meta_make_border_region:
* @region: a #cairo_region_t
* @x_amount: distance from the border to extend horizontally
* @y_amount: distance from the border to extend vertically
* @flip: if true, the result is computed with x and y interchanged
*
* Computes the "border region" of a given region, which is roughly
* speaking the set of points near the boundary of the region. If we
* define the operation of growing a region as computing the set of
* points within a given manhattan distance of the region, then the
* border is 'grow(region) intersect grow(inverse(region))'.
*
* If we create an image by filling the region with a solid color,
* the border is the region affected by blurring the region.
*
* Return value: a new region which is the border of the given region
*/
cairo_region_t *
meta_make_border_region (cairo_region_t *region,
int x_amount,
int y_amount,
gboolean flip)
{
cairo_region_t *border_region;
cairo_region_t *inverse_region;
border_region = expand_region (region, x_amount, y_amount, flip);
inverse_region = expand_region_inverse (region, x_amount, y_amount, flip);
cairo_region_intersect (border_region, inverse_region);
cairo_region_destroy (inverse_region);
return border_region;
}
JOY_GNUC_HOT
void
joy_gfx3d_window_submit(JoyBubble *self, GFX3D_NATIVE_Display display,
GFX3D_NATIVE_Surface fb, cairo_region_t *area)
{
g_return_if_fail(JOY_IS_GFX3D_WINDOW(self));
g_return_if_fail(display);
g_return_if_fail(fb);
struct Private *priv = GET_PRIVATE(self);
if (G_UNLIKELY(!priv->image)) {
return;
}
gint x = joy_bubble_get_x(self);
gint y = joy_bubble_get_y(self);
cairo_region_intersect(priv->expose, priv->area);
cairo_region_intersect(priv->expose, area);
if (cairo_region_is_empty(priv->expose)) {
return;
}
GFX3D_NATIVE_Surface surface =
GFX3D_Image_Get_NATIVE_Surface(priv->image);
gint n = cairo_region_num_rectangles(priv->expose);
gdouble alpha = joy_bubble_get_alpha(self);
if (1. == alpha) {
GFX3D_NATIVE_Blit_Blend_Generic_Parms_t parameters = {
{
GFX3D_NATIVE_BLIT_BLEND_CONST_eOne,
GFX3D_NATIVE_BLIT_BLEND_CONST_eSourceColor,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eDestinationColor,
GFX3D_NATIVE_BLIT_BLEND_CONST_eInverseSourceAlpha,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eZero
},
{
GFX3D_NATIVE_BLIT_BLEND_CONST_eOne,
GFX3D_NATIVE_BLIT_BLEND_CONST_eSourceAlpha,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eDestinationAlpha,
GFX3D_NATIVE_BLIT_BLEND_CONST_eInverseSourceAlpha,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eZero,
},
0,
0,
0,
GFX3D_NATIVE_BLIT_FilterCoeffs_eNone,
GFX3D_NATIVE_BLIT_FilterCoeffs_eNone,
0,
0
};
for (gint i = 0; i < n; ++i) {
cairo_rectangle_int_t rect;
cairo_region_get_rectangle(priv->expose, i, &rect);
GFX3D_NATIVE_Rect dst = {
rect.x + x,
rect.y + y,
rect.width,
rect.height
};
GFX3D_NATIVE_Blit_Blend_Generic(display,
fb, &dst,
surface, (gpointer)&rect,
fb, &dst,
¶meters);
}
} else {
GFX3D_NATIVE_Blit_Blend_Generic_Parms_t parameters = {
{
GFX3D_NATIVE_BLIT_BLEND_CONST_eConstantAlpha,
GFX3D_NATIVE_BLIT_BLEND_CONST_eSourceColor,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eDestinationColor,
GFX3D_NATIVE_BLIT_BLEND_CONST_eInverseSourceAlpha,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eZero
},
{
GFX3D_NATIVE_BLIT_BLEND_CONST_eOne,
GFX3D_NATIVE_BLIT_BLEND_CONST_eSourceAlpha,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eDestinationAlpha,
GFX3D_NATIVE_BLIT_BLEND_CONST_eInverseSourceAlpha,
0,
GFX3D_NATIVE_BLIT_BLEND_CONST_eZero,
},
(gint)(0xff * alpha) << 24,
0,
0,
GFX3D_NATIVE_BLIT_FilterCoeffs_eNone,
GFX3D_NATIVE_BLIT_FilterCoeffs_eNone,
0,
0
};
for (gint i = 0; i < n; ++i) {
cairo_rectangle_int_t rect;
cairo_region_get_rectangle(priv->expose, i, &rect);
GFX3D_NATIVE_Rect dst = {
rect.x + x,
rect.y + y,
rect.width,
rect.height
};
GFX3D_NATIVE_Blit_Blend_Generic(display,
fb, &dst,
surface, (gpointer)&rect,
fb, &dst,
¶meters);
}
}
cairo_region_subtract(priv->expose, priv->expose);
}
/**
* meta_shadow_paint:
* @window_x: x position of the region to paint a shadow for
* @window_y: y position of the region to paint a shadow for
* @window_width: actual width of the region to paint a shadow for
* @window_height: actual height of the region to paint a shadow for
* @clip: (allow-none): if non-%NULL specifies the visible portion
* of the shadow.
* @clip_strictly: if %TRUE, drawing will be clipped strictly
* to @clip, otherwise, it will be only used to optimize
* drawing.
*
* Paints the shadow at the given position, for the specified actual
* size of the region. (Since a #MetaShadow can be shared between
* different sizes with the same extracted #MetaWindowShape the
* size needs to be passed in here.)
*/
void
meta_shadow_paint (MetaShadow *shadow,
int window_x,
int window_y,
int window_width,
int window_height,
guint8 opacity,
cairo_region_t *clip,
gboolean clip_strictly)
{
float texture_width = cogl_texture_get_width (shadow->texture);
float texture_height = cogl_texture_get_height (shadow->texture);
int i, j;
float src_x[4];
float src_y[4];
int dest_x[4];
int dest_y[4];
int n_x, n_y;
cogl_material_set_color4ub (shadow->material,
opacity, opacity, opacity, opacity);
cogl_set_source (shadow->material);
if (shadow->scale_width)
{
n_x = 3;
src_x[0] = 0.0;
src_x[1] = (shadow->inner_border_left + shadow->outer_border_left) / texture_width;
src_x[2] = (texture_width - (shadow->inner_border_right + shadow->outer_border_right)) / texture_width;
src_x[3] = 1.0;
dest_x[0] = window_x - shadow->outer_border_left;
dest_x[1] = window_x + shadow->inner_border_left;
dest_x[2] = window_x + window_width - shadow->inner_border_right;
dest_x[3] = window_x + window_width + shadow->outer_border_right;
}
else
{
n_x = 1;
src_x[0] = 0.0;
src_x[1] = 1.0;
dest_x[0] = window_x - shadow->outer_border_left;
dest_x[1] = window_x + window_width + shadow->outer_border_right;
}
if (shadow->scale_height)
{
n_y = 3;
src_y[0] = 0.0;
src_y[1] = (shadow->inner_border_top + shadow->outer_border_top) / texture_height;
src_y[2] = (texture_height - (shadow->inner_border_bottom + shadow->outer_border_bottom)) / texture_height;
src_y[3] = 1.0;
dest_y[0] = window_y - shadow->outer_border_top;
dest_y[1] = window_y + shadow->inner_border_top;
dest_y[2] = window_y + window_height - shadow->inner_border_bottom;
dest_y[3] = window_y + window_height + shadow->outer_border_bottom;
}
else
{
n_y = 1;
src_y[0] = 0.0;
src_y[1] = 1.0;
dest_y[0] = window_y - shadow->outer_border_top;
dest_y[1] = window_y + window_height + shadow->outer_border_bottom;
}
for (j = 0; j < n_y; j++)
{
cairo_rectangle_int_t dest_rect;
dest_rect.y = dest_y[j];
dest_rect.height = dest_y[j + 1] - dest_y[j];
if (dest_rect.height == 0)
continue;
for (i = 0; i < n_x; i++)
{
cairo_region_overlap_t overlap;
dest_rect.x = dest_x[i];
dest_rect.width = dest_x[i + 1] - dest_x[i];
if (dest_rect.width == 0)
continue;
if (clip)
overlap = cairo_region_contains_rectangle (clip, &dest_rect);
else
overlap = CAIRO_REGION_OVERLAP_IN;
/* There's quite a bit of overhead from allocating a new
* region in order to find an exact intersection and
* generating more geometry - we make the assumption that
* unless we have to clip strictly it will be cheaper to
* just draw the entire rectangle.
*/
if (overlap == CAIRO_REGION_OVERLAP_IN ||
(overlap == CAIRO_REGION_OVERLAP_PART && !clip_strictly))
{
cogl_rectangle_with_texture_coords (dest_x[i], dest_y[j],
dest_x[i + 1], dest_y[j + 1],
src_x[i], src_y[j],
src_x[i + 1], src_y[j + 1]);
}
else if (overlap == CAIRO_REGION_OVERLAP_PART)
{
cairo_region_t *intersection;
int n_rectangles, k;
intersection = cairo_region_create_rectangle (&dest_rect);
cairo_region_intersect (intersection, clip);
n_rectangles = cairo_region_num_rectangles (intersection);
for (k = 0; k < n_rectangles; k++)
{
cairo_rectangle_int_t rect;
float src_x1, src_x2, src_y1, src_y2;
cairo_region_get_rectangle (intersection, k, &rect);
/* Separately linear interpolate X and Y coordinates in the source
* based on the destination X and Y coordinates */
src_x1 = (src_x[i] * (dest_rect.x + dest_rect.width - rect.x) +
src_x[i + 1] * (rect.x - dest_rect.x)) / dest_rect.width;
src_x2 = (src_x[i] * (dest_rect.x + dest_rect.width - (rect.x + rect.width)) +
src_x[i + 1] * (rect.x + rect.width - dest_rect.x)) / dest_rect.width;
src_y1 = (src_y[j] * (dest_rect.y + dest_rect.height - rect.y) +
src_y[j + 1] * (rect.y - dest_rect.y)) / dest_rect.height;
src_y2 = (src_y[j] * (dest_rect.y + dest_rect.height - (rect.y + rect.height)) +
src_y[j + 1] * (rect.y + rect.height - dest_rect.y)) / dest_rect.height;
cogl_rectangle_with_texture_coords (rect.x, rect.y,
rect.x + rect.width, rect.y + rect.height,
src_x1, src_y1, src_x2, src_y2);
}
cairo_region_destroy (intersection);
}
}
}
}
/**
* gdk_cairo_draw_from_gl:
* @cr: a cairo context
* @window: The window we're rendering for (not necessarily into)
* @source: The GL ID of the source buffer
* @source_type: The type of the @source
* @buffer_scale: The scale-factor that the @source buffer is allocated for
* @x: The source x position in @source to start copying from in GL coordinates
* @y: The source y position in @source to start copying from in GL coordinates
* @width: The width of the region to draw
* @height: The height of the region to draw
*
* This is the main way to draw GL content in GTK+. It takes a render buffer ID
* (@source_type == #GL_RENDERBUFFER) or a texture id (@source_type == #GL_TEXTURE)
* and draws it onto @cr with an OVER operation, respecting the current clip.
* The top left corner of the rectangle specified by @x, @y, @width and @height
* will be drawn at the current (0,0) position of the cairo_t.
*
* This will work for *all* cairo_t, as long as @window is realized, but the
* fallback implementation that reads back the pixels from the buffer may be
* used in the general case. In the case of direct drawing to a window with
* no special effects applied to @cr it will however use a more efficient
* approach.
*
* For #GL_RENDERBUFFER the code will always fall back to software for buffers
* with alpha components, so make sure you use #GL_TEXTURE if using alpha.
*
* Calling this may change the current GL context.
*
* Since: 3.16
*/
void
gdk_cairo_draw_from_gl (cairo_t *cr,
GdkWindow *window,
int source,
int source_type,
int buffer_scale,
int x,
int y,
int width,
int height)
{
GdkGLContext *paint_context;
cairo_surface_t *image;
cairo_matrix_t matrix;
int dx, dy, window_scale;
gboolean trivial_transform;
cairo_surface_t *group_target;
GdkWindow *direct_window, *impl_window;
guint framebuffer;
int alpha_size = 0;
cairo_region_t *clip_region;
GdkGLContextPaintData *paint_data;
impl_window = window->impl_window;
window_scale = gdk_window_get_scale_factor (impl_window);
paint_context = gdk_window_get_paint_gl_context (window, NULL);
if (paint_context == NULL)
{
g_warning ("gdk_cairo_draw_gl_render_buffer failed - no paint context");
return;
}
clip_region = gdk_cairo_region_from_clip (cr);
gdk_gl_context_make_current (paint_context);
paint_data = gdk_gl_context_get_paint_data (paint_context);
if (paint_data->tmp_framebuffer == 0)
glGenFramebuffersEXT (1, &paint_data->tmp_framebuffer);
if (source_type == GL_RENDERBUFFER)
{
glBindRenderbuffer (GL_RENDERBUFFER, source);
glGetRenderbufferParameteriv (GL_RENDERBUFFER, GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
}
else if (source_type == GL_TEXTURE)
{
glBindTexture (GL_TEXTURE_2D, source);
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_ALPHA_SIZE, &alpha_size);
}
else
{
g_warning ("Unsupported gl source type %d\n", source_type);
return;
}
group_target = cairo_get_group_target (cr);
direct_window = cairo_surface_get_user_data (group_target, &direct_key);
cairo_get_matrix (cr, &matrix);
dx = matrix.x0;
dy = matrix.y0;
/* Trivial == integer-only translation */
trivial_transform =
(double)dx == matrix.x0 && (double)dy == matrix.y0 &&
matrix.xx == 1.0 && matrix.xy == 0.0 &&
matrix.yx == 0.0 && matrix.yy == 1.0;
/* For direct paint of non-alpha renderbuffer, we can
just do a bitblit */
if ((_gdk_gl_flags & GDK_GL_SOFTWARE_DRAW_GL) == 0 &&
source_type == GL_RENDERBUFFER &&
alpha_size == 0 &&
direct_window != NULL &&
direct_window->current_paint.use_gl &&
trivial_transform &&
clip_region != NULL)
{
int unscaled_window_height;
int i;
/* Create a framebuffer with the source renderbuffer and
make it the current target for reads */
framebuffer = paint_data->tmp_framebuffer;
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, framebuffer);
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT, source);
glBindFramebufferEXT (GL_DRAW_FRAMEBUFFER_EXT, 0);
/* Translate to impl coords */
cairo_region_translate (clip_region, dx, dy);
glEnable (GL_SCISSOR_TEST);
gdk_window_get_unscaled_size (impl_window, NULL, &unscaled_window_height);
glDrawBuffer (GL_BACK);
#define FLIP_Y(_y) (unscaled_window_height - (_y))
for (i = 0; i < cairo_region_num_rectangles (clip_region); i++)
{
cairo_rectangle_int_t clip_rect, dest;
cairo_region_get_rectangle (clip_region, i, &clip_rect);
clip_rect.x *= window_scale;
clip_rect.y *= window_scale;
clip_rect.width *= window_scale;
clip_rect.height *= window_scale;
glScissor (clip_rect.x, FLIP_Y (clip_rect.y + clip_rect.height),
clip_rect.width, clip_rect.height);
dest.x = dx * window_scale;
dest.y = dy * window_scale;
dest.width = width * window_scale / buffer_scale;
dest.height = height * window_scale / buffer_scale;
if (gdk_rectangle_intersect (&clip_rect, &dest, &dest))
{
int clipped_src_x = x + (dest.x - dx * window_scale);
int clipped_src_y = y + (height - dest.height - (dest.y - dy * window_scale));
glBlitFramebufferEXT(clipped_src_x, clipped_src_y,
(clipped_src_x + dest.width), (clipped_src_y + dest.height),
dest.x, FLIP_Y(dest.y + dest.height),
dest.x + dest.width, FLIP_Y(dest.y),
GL_COLOR_BUFFER_BIT, GL_NEAREST);
if (impl_window->current_paint.flushed_region)
{
cairo_rectangle_int_t flushed_rect;
flushed_rect.x = dest.x / window_scale;
flushed_rect.y = dest.y / window_scale;
flushed_rect.width = (dest.x + dest.width + window_scale - 1) / window_scale - flushed_rect.x;
flushed_rect.height = (dest.y + dest.height + window_scale - 1) / window_scale - flushed_rect.y;
cairo_region_union_rectangle (impl_window->current_paint.flushed_region,
&flushed_rect);
cairo_region_subtract_rectangle (impl_window->current_paint.need_blend_region,
&flushed_rect);
}
}
}
glDisable (GL_SCISSOR_TEST);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
#undef FLIP_Y
}
/* For direct paint of alpha or non-alpha textures we can use texturing */
else if ((_gdk_gl_flags & GDK_GL_SOFTWARE_DRAW_GL) == 0 &&
source_type == GL_TEXTURE &&
direct_window != NULL &&
direct_window->current_paint.use_gl &&
trivial_transform &&
clip_region != NULL)
{
int unscaled_window_height;
GLint texture_width;
GLint texture_height;
int i, n_rects, n_quads;
GdkTexturedQuad *quads;
cairo_rectangle_int_t clip_rect;
/* Translate to impl coords */
cairo_region_translate (clip_region, dx, dy);
if (alpha_size != 0)
{
cairo_region_t *opaque_region, *blend_region;
opaque_region = cairo_region_copy (clip_region);
cairo_region_subtract (opaque_region, impl_window->current_paint.flushed_region);
cairo_region_subtract (opaque_region, impl_window->current_paint.need_blend_region);
if (!cairo_region_is_empty (opaque_region))
gdk_gl_texture_from_surface (impl_window->current_paint.surface,
opaque_region);
blend_region = cairo_region_copy (clip_region);
cairo_region_intersect (blend_region, impl_window->current_paint.need_blend_region);
glEnable (GL_BLEND);
if (!cairo_region_is_empty (blend_region))
gdk_gl_texture_from_surface (impl_window->current_paint.surface,
blend_region);
cairo_region_destroy (opaque_region);
cairo_region_destroy (blend_region);
}
glBindTexture (GL_TEXTURE_2D, source);
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_WIDTH, &texture_width);
glGetTexLevelParameteriv (GL_TEXTURE_2D, 0, GL_TEXTURE_HEIGHT, &texture_height);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_REPEAT);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
glTexParameteri (GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
glEnable (GL_SCISSOR_TEST);
gdk_window_get_unscaled_size (impl_window, NULL, &unscaled_window_height);
#define FLIP_Y(_y) (unscaled_window_height - (_y))
cairo_region_get_extents (clip_region, &clip_rect);
glScissor (clip_rect.x * window_scale, FLIP_Y ((clip_rect.y + clip_rect.height) * window_scale),
clip_rect.width * window_scale, clip_rect.height * window_scale);
n_quads = 0;
n_rects = cairo_region_num_rectangles (clip_region);
quads = g_new (GdkTexturedQuad, n_rects);
for (i = 0; i < n_rects; i++)
{
cairo_rectangle_int_t dest;
cairo_region_get_rectangle (clip_region, i, &clip_rect);
clip_rect.x *= window_scale;
clip_rect.y *= window_scale;
clip_rect.width *= window_scale;
clip_rect.height *= window_scale;
dest.x = dx * window_scale;
dest.y = dy * window_scale;
dest.width = width * window_scale / buffer_scale;
dest.height = height * window_scale / buffer_scale;
if (gdk_rectangle_intersect (&clip_rect, &dest, &dest))
{
int clipped_src_x = x + (dest.x - dx * window_scale);
int clipped_src_y = y + (height - dest.height - (dest.y - dy * window_scale));
GdkTexturedQuad quad = {
dest.x, FLIP_Y(dest.y),
dest.x + dest.width, FLIP_Y(dest.y + dest.height),
clipped_src_x / (float)texture_width, (clipped_src_y + dest.height) / (float)texture_height,
(clipped_src_x + dest.width) / (float)texture_width, clipped_src_y / (float)texture_height,
};
quads[n_quads++] = quad;
if (impl_window->current_paint.flushed_region)
{
cairo_rectangle_int_t flushed_rect;
flushed_rect.x = dest.x / window_scale;
flushed_rect.y = dest.y / window_scale;
flushed_rect.width = (dest.x + dest.width + window_scale - 1) / window_scale - flushed_rect.x;
flushed_rect.height = (dest.y + dest.height + window_scale - 1) / window_scale - flushed_rect.y;
cairo_region_union_rectangle (impl_window->current_paint.flushed_region,
&flushed_rect);
cairo_region_subtract_rectangle (impl_window->current_paint.need_blend_region,
&flushed_rect);
}
}
}
if (n_quads > 0)
gdk_gl_texture_quads (paint_context, GL_TEXTURE_2D, n_quads, quads);
g_free (quads);
if (alpha_size != 0)
glDisable (GL_BLEND);
#undef FLIP_Y
}
else
{
/* Software fallback */
/* TODO: avoid reading back non-required data due to dest clip */
image = cairo_surface_create_similar_image (cairo_get_target (cr),
(alpha_size == 0) ? CAIRO_FORMAT_RGB24 : CAIRO_FORMAT_ARGB32,
width, height);
cairo_surface_set_device_scale (image, buffer_scale, buffer_scale);
framebuffer = paint_data->tmp_framebuffer;
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, framebuffer);
if (source_type == GL_RENDERBUFFER)
{
/* Create a framebuffer with the source renderbuffer and
make it the current target for reads */
glFramebufferRenderbufferEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_RENDERBUFFER_EXT, source);
}
else
{
glFramebufferTexture2DEXT (GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT,
GL_TEXTURE_2D, source, 0);
}
glPixelStorei (GL_PACK_ALIGNMENT, 4);
glPixelStorei (GL_PACK_ROW_LENGTH, cairo_image_surface_get_stride (image) / 4);
glReadPixels (x, y, width, height, GL_BGRA, GL_UNSIGNED_INT_8_8_8_8_REV,
cairo_image_surface_get_data (image));
glPixelStorei (GL_PACK_ROW_LENGTH, 0);
glBindFramebufferEXT (GL_FRAMEBUFFER_EXT, 0);
cairo_surface_mark_dirty (image);
/* Invert due to opengl having different origin */
cairo_scale (cr, 1, -1);
cairo_translate (cr, 0, -height / buffer_scale);
cairo_set_source_surface (cr, image, 0, 0);
cairo_set_operator (cr, CAIRO_OPERATOR_OVER);
cairo_paint (cr);
cairo_surface_destroy (image);
}
if (clip_region)
cairo_region_destroy (clip_region);
}
void
Region::Intersect (Region *region)
{
status = cairo_region_intersect (cairo_region, region->cairo_region);
}
