static void
meta_background_actor_paint (ClutterActor *actor)
{
MetaBackgroundActor *self = META_BACKGROUND_ACTOR (actor);
MetaBackgroundActorPrivate *priv = self->priv;
guint8 opacity = clutter_actor_get_paint_opacity (actor);
guint8 color_component;
int width, height;
meta_screen_get_size (priv->background->screen, &width, &height);
color_component = (int)(0.5 + opacity * priv->dim_factor);
cogl_material_set_color4ub (priv->material,
color_component,
color_component,
color_component,
opacity);
cogl_set_source (priv->material);
if (priv->visible_region)
{
int n_rectangles = cairo_region_num_rectangles (priv->visible_region);
int i;
for (i = 0; i < n_rectangles; i++)
{
cairo_rectangle_int_t rect;
cairo_region_get_rectangle (priv->visible_region, i, &rect);
cogl_rectangle_with_texture_coords (rect.x, rect.y,
rect.x + rect.width, rect.y + rect.height,
rect.x / priv->background->texture_width,
rect.y / priv->background->texture_height,
(rect.x + rect.width) / priv->background->texture_width,
(rect.y + rect.height) / priv->background->texture_height);
}
}
else
{
cogl_rectangle_with_texture_coords (0.0f, 0.0f,
width, height,
0.0f, 0.0f,
width / priv->background->texture_width,
height / priv->background->texture_height);
}
}
void
_st_paint_shadow_with_opacity (StShadow *shadow_spec,
CoglHandle shadow_material,
ClutterActorBox *box,
guint8 paint_opacity)
{
ClutterActorBox shadow_box;
CoglColor color;
g_return_if_fail (shadow_spec != NULL);
g_return_if_fail (shadow_material != COGL_INVALID_HANDLE);
st_shadow_get_box (shadow_spec, box, &shadow_box);
cogl_color_set_from_4ub (&color,
shadow_spec->color.red * paint_opacity / 255,
shadow_spec->color.green * paint_opacity / 255,
shadow_spec->color.blue * paint_opacity / 255,
shadow_spec->color.alpha * paint_opacity / 255);
cogl_color_premultiply (&color);
cogl_material_set_layer_combine_constant (shadow_material, 0, &color);
cogl_set_source (shadow_material);
cogl_rectangle_with_texture_coords (shadow_box.x1, shadow_box.y1,
shadow_box.x2, shadow_box.y2,
0, 0, 1, 1);
}
static void
glide_image_paint (ClutterActor *self)
{
GlideImage *image = GLIDE_IMAGE (self);
GlideImagePrivate *priv = image->priv;
ClutterActorBox box = {0, };
gfloat t_w, t_h;
guint8 paint_opacity = clutter_actor_get_paint_opacity (self);
if (paint_opacity == 0)
{
return;
}
GLIDE_NOTE (PAINT,
"painting image '%s'",
GLIDE_ACTOR_DISPLAY_NAME (self));
cogl_material_set_color4ub (priv->material, paint_opacity, paint_opacity, paint_opacity, paint_opacity);
clutter_actor_get_allocation_box (self, &box);
GLIDE_NOTE (PAINT, "paint to x1: %f, y1: %f x2: %f, y2: %f "
"opacity: %i",
box.x1, box.y1, box.x2, box.y2,
clutter_actor_get_opacity (self));
t_w = 1.0;
t_h = 1.0;
cogl_set_source (priv->material);
cogl_rectangle_with_texture_coords (0, 0,
box.x2 - box.x1, box.y2 - box.y1,
0, 0, t_w, t_h);
}
static void
penge_magic_texture_paint (ClutterActor *actor)
{
ClutterActorBox box;
CoglHandle *material, *tex;
float bw, bh;
float aw, ah;
float v;
float tx1, tx2, ty1, ty2;
guint8 alpha;
clutter_actor_get_allocation_box (actor, &box);
material = clutter_texture_get_cogl_material (CLUTTER_TEXTURE (actor));
tex = clutter_texture_get_cogl_texture (CLUTTER_TEXTURE (actor));
bw = (float) cogl_texture_get_width (tex); /* base texture width */
bh = (float) cogl_texture_get_height (tex); /* base texture height */
aw = (float) (box.x2 - box.x1); /* allocation width */
ah = (float) (box.y2 - box.y1); /* allocation height */
/* no comment */
if ((float)bw/bh < (float)aw/ah)
{
/* fit width */
v = (((float)ah * bw) / ((float)aw * bh)) / 2;
tx1 = 0;
tx2 = 1;
ty1 = (0.5 - v);
ty2 = (0.5 + v);
} else {
/* fit height */
v = (((float)aw * bh) / ((float)ah * bw)) / 2;
tx1 = (0.5 - v);
tx2 = (0.5 + v);
ty1 = 0;
ty2 = 1;
}
alpha = clutter_actor_get_paint_opacity (actor);
cogl_material_set_color4ub (material,
alpha,
alpha,
alpha,
alpha);
cogl_set_source (material);
cogl_rectangle_with_texture_coords (0, 0,
aw, ah,
tx1, ty1,
tx2, ty2);
}
static void
mnb_spinner_paint (ClutterActor *self)
{
MnbSpinnerPrivate *priv = MNB_SPINNER (self)->priv;
MxWidget *widget = MX_WIDGET (self);
ClutterTexture *background;
/*
* This paints border-image.
*/
CLUTTER_ACTOR_CLASS (mnb_spinner_parent_class)->paint (self);
if ((background = (ClutterTexture *) mx_widget_get_background_image (widget)))
{
gint tx_w, tx_h;
gfloat tf_x, tf_y, tf_w, tf_h;
guint8 opacity;
ClutterActorBox box = { 0, };
CoglHandle material;
if (!CLUTTER_IS_TEXTURE (background))
return;
opacity = clutter_actor_get_paint_opacity (self);
if (opacity == 0)
return;
clutter_texture_get_base_size (background, &tx_w, &tx_h);
material = clutter_texture_get_cogl_material (background);
cogl_material_set_color4ub (material, opacity, opacity, opacity, opacity);
clutter_actor_get_allocation_box (self, &box);
tf_x = (gfloat)priv->frame / (gfloat) priv->n_frames;
tf_y = 0.0;
tf_w = tf_x + 1.0 / priv->n_frames;
tf_h = 1.0;
/* Paint will have translated us */
cogl_set_source (material);
cogl_rectangle_with_texture_coords (0.0, 0.0,
box.x2 - box.x1,
box.y2 - box.y1,
tf_x, tf_y, tf_w, tf_h);
}
}
static void
emit_rectangles_through_journal (CoglPangoDisplayListNode *node)
{
int i;
for (i = 0; i < node->d.texture.verts->len; i += 4)
{
CoglPangoDisplayListVertex *v0 =
&g_array_index (node->d.texture.verts,
CoglPangoDisplayListVertex, i);
CoglPangoDisplayListVertex *v1 =
&g_array_index (node->d.texture.verts,
CoglPangoDisplayListVertex, i + 2);
cogl_rectangle_with_texture_coords (v0->x, v0->y, v1->x, v1->y,
v0->t_x, v0->t_y,
v1->t_x, v1->t_y);
}
}
static void
_cogl_blit_texture_render_blit (CoglBlitData *data,
unsigned int src_x,
unsigned int src_y,
unsigned int dst_x,
unsigned int dst_y,
unsigned int width,
unsigned int height)
{
cogl_rectangle_with_texture_coords (dst_x, dst_y,
dst_x + width,
dst_y + height,
src_x / (float) data->src_width,
src_y / (float) data->src_height,
(src_x + width) /
(float) data->src_width,
(src_y + height) /
(float) data->src_height);
}
static void trickplay_webgl_canvas_paint (ClutterActor *self)
{
ClutterTexture *texture = CLUTTER_TEXTURE (self);
guint8 paint_opacity = clutter_actor_get_paint_opacity (self);
CoglMaterial * material = ( CoglMaterial * ) clutter_texture_get_cogl_material( texture );
cogl_material_set_color4ub (material,
paint_opacity,
paint_opacity,
paint_opacity,
paint_opacity);
cogl_set_source (material);
ClutterActorBox box;
clutter_actor_get_allocation_box (self, &box);
cogl_rectangle_with_texture_coords ( 0 , 0 , box.x2 - box.x1 , box.y2 - box.y1 ,
0, 1, 1, 0);
}
static void
on_paint (ClutterActor *actor, CallbackData *data)
{
int i;
ClutterGeometry stage_size;
gint hand_width, hand_height;
GSList *node;
clutter_actor_get_allocation_geometry (data->stage, &stage_size);
hand_width = cogl_texture_get_width (data->hand);
hand_height = cogl_texture_get_height (data->hand);
/* Setup the clipping */
for (node = data->clips; node; node = node->next)
{
Clip *clip = (Clip *) node->data;
if (clip->type == CLIP_RECTANGLE)
cogl_clip_push_rectangle (clip->x1,
clip->y1,
clip->x2,
clip->y2);
else if (clip->type == CLIP_ROTATED_RECTANGLE)
{
float size = MIN (ABS (clip->x2 - clip->x1),
ABS (clip->y2 - clip->y1));
int cx = (clip->x1 + clip->x2) / 2;
int cy = (clip->y1 + clip->y2) / 2;
size = sqrtf ((size / 2) * (size / 2) * 2);
cogl_push_matrix ();
/* Rotate 45° about the centre point */
cogl_translate (cx, cy, 0.0f);
cogl_rotate (45.0f, 0.0f, 0.0f, 1.0f);
cogl_clip_push_rectangle (-size / 2, -size / 2, size / 2, size / 2);
cogl_pop_matrix ();
}
else
{
make_clip_path (clip);
cogl_clip_push_from_path ();
}
}
/* Draw a rectangle filling the entire stage */
cogl_set_source_color4ub (0x80, 0x80, 0xff, 0xff);
cogl_rectangle (0, 0, stage_size.width, stage_size.height);
draw_shapes (10, 10);
/* Draw the hand at different rotations */
for (i = -2; i <= 2; i++)
{
cogl_push_matrix ();
cogl_translate (stage_size.width / 2 + stage_size.width / 6 * i,
stage_size.height / 2, 0);
cogl_rotate (i * 40, 0, 1, 0);
cogl_set_source_color4ub (0xff, 0xff, 0xff, 0xff);
cogl_set_source_texture (data->hand);
cogl_rectangle_with_texture_coords ((-hand_width / 2),
(-hand_height / 2),
(hand_width / 2),
(hand_height / 2),
0, 0, 1, 1);
cogl_pop_matrix ();
}
draw_shapes (stage_size.width - 310, stage_size.height - 110);
/* Remove all of the clipping */
g_slist_foreach (data->clips, (GFunc) cogl_clip_pop, NULL);
/* Draw the bounding box for each of the clips */
for (node = data->clips; node; node = node->next)
{
Clip *clip = (Clip *) node->data;
make_clip_path (clip);
cogl_set_source_color4ub (0x00, 0x00, 0xff, 0xff);
cogl_path_stroke ();
}
/* Draw the bounding box for the pending new clip */
if (data->current_clip.type != CLIP_NONE)
{
make_clip_path (&data->current_clip);
cogl_set_source_color4ub (0xff, 0x00, 0x00, 0xff);
cogl_path_stroke ();
}
}
static void
st_drawing_area_paint (ClutterActor *self)
{
StDrawingArea *area = ST_DRAWING_AREA (self);
StDrawingAreaPrivate *priv = area->priv;
StThemeNode *theme_node = st_widget_get_theme_node (ST_WIDGET (self));
ClutterActorBox allocation_box;
ClutterActorBox content_box;
int width, height;
CoglColor color;
guint8 paint_opacity;
(CLUTTER_ACTOR_CLASS (st_drawing_area_parent_class))->paint (self);
clutter_actor_get_allocation_box (self, &allocation_box);
st_theme_node_get_content_box (theme_node, &allocation_box, &content_box);
width = (int)(0.5 + content_box.x2 - content_box.x1);
height = (int)(0.5 + content_box.y2 - content_box.y1);
if (priv->material == COGL_INVALID_HANDLE)
priv->material = cogl_material_new ();
if (priv->texture != COGL_INVALID_HANDLE &&
(width != cogl_texture_get_width (priv->texture) ||
height != cogl_texture_get_height (priv->texture)))
{
cogl_handle_unref (priv->texture);
priv->texture = COGL_INVALID_HANDLE;
}
if (width > 0 && height > 0)
{
if (priv->texture == COGL_INVALID_HANDLE)
{
priv->texture = cogl_texture_new_with_size (width, height,
COGL_TEXTURE_NONE,
CLUTTER_CAIRO_FORMAT_ARGB32);
priv->needs_repaint = TRUE;
}
if (priv->needs_repaint)
{
cairo_surface_t *surface;
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32, width, height);
priv->context = cairo_create (surface);
priv->in_repaint = TRUE;
priv->needs_repaint = FALSE;
g_signal_emit ((GObject*)area, st_drawing_area_signals[REPAINT], 0);
priv->in_repaint = FALSE;
cairo_destroy (priv->context);
priv->context = NULL;
cogl_texture_set_region (priv->texture, 0, 0, 0, 0, width, height, width, height,
CLUTTER_CAIRO_FORMAT_ARGB32,
cairo_image_surface_get_stride (surface),
cairo_image_surface_get_data (surface));
cairo_surface_destroy (surface);
}
}
cogl_material_set_layer (priv->material, 0, priv->texture);
if (priv->texture)
{
paint_opacity = clutter_actor_get_paint_opacity (self);
cogl_color_set_from_4ub (&color,
paint_opacity, paint_opacity, paint_opacity, paint_opacity);
cogl_material_set_color (priv->material, &color);
cogl_set_source (priv->material);
cogl_rectangle_with_texture_coords (content_box.x1, content_box.y1,
width, height,
0.0f, 0.0f, 1.0f, 1.0f);
}
}
static void
paint_test_backface_culling (TestState *state)
{
int draw_num;
CoglPipeline *base_pipeline = cogl_pipeline_new ();
CoglColor clear_color;
cogl_ortho (0, state->width, /* left, right */
state->height, 0, /* bottom, top */
-1, 100 /* z near, far */);
cogl_color_init_from_4ub (&clear_color, 0x00, 0x00, 0x00, 0xff);
cogl_clear (&clear_color, COGL_BUFFER_BIT_COLOR | COGL_BUFFER_BIT_STENCIL);
cogl_pipeline_set_layer_texture (base_pipeline, 0, state->texture);
cogl_pipeline_set_layer_filters (base_pipeline, 0,
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
/* Render the scene sixteen times to test all of the combinations of
cull face mode, legacy state and winding orders */
for (draw_num = 0; draw_num < 16; draw_num++)
{
float x1 = 0, x2, y1 = 0, y2 = (float)(TEXTURE_RENDER_SIZE);
CoglTextureVertex verts[4];
CoglPipeline *pipeline;
cogl_push_matrix ();
cogl_translate (0, TEXTURE_RENDER_SIZE * draw_num, 0);
pipeline = cogl_pipeline_copy (base_pipeline);
cogl_set_backface_culling_enabled (USE_LEGACY_STATE (draw_num));
cogl_pipeline_set_front_face_winding (pipeline, FRONT_WINDING (draw_num));
cogl_pipeline_set_cull_face_mode (pipeline, CULL_FACE_MODE (draw_num));
cogl_push_source (pipeline);
memset (verts, 0, sizeof (verts));
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* Draw a front-facing texture */
cogl_rectangle (x1, y1, x2, y2);
x1 = x2;
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* Draw a front-facing texture with flipped texcoords */
cogl_rectangle_with_texture_coords (x1, y1, x2, y2,
1.0, 0.0, 0.0, 1.0);
x1 = x2;
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* Draw a back-facing texture */
cogl_rectangle (x2, y1, x1, y2);
x1 = x2;
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* If the texture is sliced then cogl_polygon doesn't work so
we'll just use a solid color instead */
if (cogl_texture_is_sliced (state->texture))
cogl_set_source_color4ub (255, 0, 0, 255);
/* Draw a front-facing polygon */
verts[0].x = x1; verts[0].y = y2;
verts[1].x = x2; verts[1].y = y2;
verts[2].x = x2; verts[2].y = y1;
verts[3].x = x1; verts[3].y = y1;
verts[0].tx = 0; verts[0].ty = 0;
verts[1].tx = 1.0; verts[1].ty = 0;
verts[2].tx = 1.0; verts[2].ty = 1.0;
verts[3].tx = 0; verts[3].ty = 1.0;
cogl_polygon (verts, 4, FALSE);
x1 = x2;
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
/* Draw a back-facing polygon */
verts[0].x = x1; verts[0].y = y1;
verts[1].x = x2; verts[1].y = y1;
verts[2].x = x2; verts[2].y = y2;
verts[3].x = x1; verts[3].y = y2;
verts[0].tx = 0; verts[0].ty = 0;
verts[1].tx = 1.0; verts[1].ty = 0;
verts[2].tx = 1.0; verts[2].ty = 1.0;
verts[3].tx = 0; verts[3].ty = 1.0;
cogl_polygon (verts, 4, FALSE);
x1 = x2;
x2 = x1 + (float)(TEXTURE_RENDER_SIZE);
cogl_pop_matrix ();
cogl_pop_source ();
cogl_object_unref (pipeline);
}
cogl_object_unref (base_pipeline);
}
/**
* 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);
}
}
}
}
/* Reads back the contents of a texture by rendering it to the framebuffer
* and reading back the resulting pixels.
*
* It will perform multiple renders if the texture is larger than the
* current glViewport.
*
* It assumes the projection and modelview have already been setup so
* that rendering to 0,0 with the same width and height of the viewport
* will exactly cover the viewport.
*
* NB: Normally this approach isn't normally used since we can just use
* glGetTexImage, but may be used as a fallback in some circumstances.
*/
static void
do_texture_draw_and_read (CoglHandle handle,
CoglBitmap *target_bmp,
GLint *viewport)
{
int bpp;
float rx1, ry1;
float rx2, ry2;
float tx1, ty1;
float tx2, ty2;
int bw, bh;
CoglBitmap *rect_bmp;
unsigned int tex_width, tex_height;
bpp = _cogl_get_format_bpp (COGL_PIXEL_FORMAT_RGBA_8888);
tex_width = cogl_texture_get_width (handle);
tex_height = cogl_texture_get_height (handle);
ry2 = 0;
ty2 = 0;
/* Walk Y axis until whole bitmap height consumed */
for (bh = tex_height; bh > 0; bh -= viewport[3])
{
/* Rectangle Y coords */
ry1 = ry2;
ry2 += (bh < viewport[3]) ? bh : viewport[3];
/* Normalized texture Y coords */
ty1 = ty2;
ty2 = (ry2 / (float) tex_height);
rx2 = 0;
tx2 = 0;
/* Walk X axis until whole bitmap width consumed */
for (bw = tex_width; bw > 0; bw-=viewport[2])
{
int width;
int height;
int rowstride;
guint8 *data;
/* Rectangle X coords */
rx1 = rx2;
rx2 += (bw < viewport[2]) ? bw : viewport[2];
width = rx2 - rx1;
height = ry2 - ry1;
rowstride = width * bpp;
/* Normalized texture X coords */
tx1 = tx2;
tx2 = (rx2 / (float) tex_width);
/* Draw a portion of texture */
cogl_rectangle_with_texture_coords (0, 0,
rx2 - rx1,
ry2 - ry1,
tx1, ty1,
tx2, ty2);
data = g_malloc (height * rowstride);
/* Read into a temporary bitmap */
rect_bmp =
_cogl_bitmap_new_from_data (data,
COGL_PIXEL_FORMAT_RGBA_8888,
width,
height,
rowstride,
(CoglBitmapDestroyNotify) g_free,
NULL);
cogl_read_pixels (viewport[0], viewport[1],
width,
height,
COGL_READ_PIXELS_COLOR_BUFFER,
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
data);
/* Copy to target bitmap */
_cogl_bitmap_copy_subregion (rect_bmp,
target_bmp,
0,0,
rx1,ry1,
width,
height);
/* Free temp bitmap */
cogl_object_unref (rect_bmp);
}
}
}
