void
_cogl_buffer_unmap_for_fill_or_fallback (CoglBuffer *buffer)
{
CoglContext *ctx = buffer->context;
_COGL_RETURN_IF_FAIL (ctx->buffer_map_fallback_in_use);
ctx->buffer_map_fallback_in_use = FALSE;
if ((buffer->flags & COGL_BUFFER_FLAG_MAPPED_FALLBACK))
{
/* Note: don't try to catch OOM errors here since the use cases
* we currently have for this api (the journal and path stroke
* tesselator) don't have anything particularly sensible they
* can do in response to a failure anyway so it seems better to
* simply abort instead.
*
* If we find this is a problem for real world applications
* then in the path tesselation case we could potentially add an
* explicit cogl_path_tesselate_stroke() api that can throw an
* error for the app to cache. For the journal we could
* potentially flush the journal in smaller batches so we use
* smaller buffers, though that would probably not help for
* deferred renderers.
*/
cogl_buffer_set_data (buffer,
ctx->buffer_map_fallback_offset,
ctx->buffer_map_fallback_array->data,
ctx->buffer_map_fallback_array->len,
NULL);
buffer->flags &= ~COGL_BUFFER_FLAG_MAPPED_FALLBACK;
}
else
cogl_buffer_unmap (buffer);
}
void
_cogl_bitmap_unmap (CoglBitmap *bitmap)
{
/* Divert to another bitmap if this data is shared */
if (bitmap->shared_bmp)
{
_cogl_bitmap_unmap (bitmap->shared_bmp);
return;
}
g_assert (bitmap->mapped);
bitmap->mapped = FALSE;
if (bitmap->buffer)
cogl_buffer_unmap (bitmap->buffer);
}
void
_cogl_buffer_unmap_for_fill_or_fallback (CoglBuffer *buffer)
{
CoglContext *ctx = buffer->context;
_COGL_RETURN_IF_FAIL (ctx->buffer_map_fallback_in_use);
ctx->buffer_map_fallback_in_use = FALSE;
if ((buffer->flags & COGL_BUFFER_FLAG_MAPPED_FALLBACK))
{
cogl_buffer_set_data (buffer, 0,
ctx->buffer_map_fallback_array->data,
buffer->size);
buffer->flags &= ~COGL_BUFFER_FLAG_MAPPED_FALLBACK;
}
else
cogl_buffer_unmap (buffer);
}
static void
emit_vertex_buffer_geometry (CoglFramebuffer *fb,
CoglPipeline *pipeline,
CoglPangoDisplayListNode *node)
{
CoglContext *ctx = fb->context;
/* It's expensive to go through the Cogl journal for large runs
* of text in part because the journal transforms the quads in software
* to avoid changing the modelview matrix. So for larger runs of text
* we load the vertices into a VBO, and this has the added advantage
* that if the text doesn't change from frame to frame the VBO can
* be re-used avoiding the repeated cost of validating the data and
* mapping it into the GPU... */
if (node->d.texture.primitive == NULL)
{
CoglAttributeBuffer *buffer;
CoglVertexP2T2 *verts, *v;
int n_verts;
CoglBool allocated = FALSE;
CoglAttribute *attributes[2];
CoglPrimitive *prim;
int i;
CoglError *ignore_error = NULL;
n_verts = node->d.texture.rectangles->len * 4;
buffer
= cogl_attribute_buffer_new_with_size (ctx,
n_verts *
sizeof (CoglVertexP2T2));
if ((verts = cogl_buffer_map (COGL_BUFFER (buffer),
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD,
&ignore_error)) == NULL)
{
cogl_error_free (ignore_error);
verts = g_new (CoglVertexP2T2, n_verts);
allocated = TRUE;
}
v = verts;
/* Copy the rectangles into the buffer and expand into four
vertices instead of just two */
for (i = 0; i < node->d.texture.rectangles->len; i++)
{
const CoglPangoDisplayListRectangle *rectangle
= &g_array_index (node->d.texture.rectangles,
CoglPangoDisplayListRectangle, i);
v->x = rectangle->x_1;
v->y = rectangle->y_1;
v->s = rectangle->s_1;
v->t = rectangle->t_1;
v++;
v->x = rectangle->x_1;
v->y = rectangle->y_2;
v->s = rectangle->s_1;
v->t = rectangle->t_2;
v++;
v->x = rectangle->x_2;
v->y = rectangle->y_2;
v->s = rectangle->s_2;
v->t = rectangle->t_2;
v++;
v->x = rectangle->x_2;
v->y = rectangle->y_1;
v->s = rectangle->s_2;
v->t = rectangle->t_1;
v++;
}
if (allocated)
{
cogl_buffer_set_data (COGL_BUFFER (buffer),
0, /* offset */
verts,
sizeof (CoglVertexP2T2) * n_verts,
NULL);
g_free (verts);
}
else
cogl_buffer_unmap (COGL_BUFFER (buffer));
attributes[0] = cogl_attribute_new (buffer,
"cogl_position_in",
sizeof (CoglVertexP2T2),
G_STRUCT_OFFSET (CoglVertexP2T2, x),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
attributes[1] = cogl_attribute_new (buffer,
"cogl_tex_coord0_in",
sizeof (CoglVertexP2T2),
G_STRUCT_OFFSET (CoglVertexP2T2, s),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
prim = cogl_primitive_new_with_attributes (COGL_VERTICES_MODE_TRIANGLES,
n_verts,
attributes,
2 /* n_attributes */);
#ifdef CLUTTER_COGL_HAS_GL
if (_cogl_has_private_feature (ctx, COGL_PRIVATE_FEATURE_QUADS))
cogl_primitive_set_mode (prim, GL_QUADS);
else
#endif
{
/* GLES doesn't support GL_QUADS so instead we use a VBO
with indexed vertices to generate GL_TRIANGLES from the
quads */
CoglIndices *indices =
cogl_get_rectangle_indices (ctx, node->d.texture.rectangles->len);
cogl_primitive_set_indices (prim, indices,
node->d.texture.rectangles->len * 6);
}
node->d.texture.primitive = prim;
cogl_object_unref (buffer);
cogl_object_unref (attributes[0]);
cogl_object_unref (attributes[1]);
}
cogl_primitive_draw (node->d.texture.primitive,
fb,
pipeline);
}
static void
clutter_deform_effect_paint_target (ClutterOffscreenEffect *effect)
{
ClutterDeformEffect *self= CLUTTER_DEFORM_EFFECT (effect);
ClutterDeformEffectPrivate *priv = self->priv;
CoglHandle material;
CoglPipeline *pipeline;
CoglDepthState depth_state;
CoglFramebuffer *fb = cogl_get_draw_framebuffer ();
if (priv->is_dirty)
{
ClutterRect rect;
gboolean mapped_buffer;
CoglVertexP3T2C4 *verts;
ClutterActor *actor;
gfloat width, height;
guint opacity;
gint i, j;
actor = clutter_actor_meta_get_actor (CLUTTER_ACTOR_META (effect));
opacity = clutter_actor_get_paint_opacity (actor);
/* if we don't have a target size, fall back to the actor's
* allocation, though wrong it might be
*/
if (clutter_offscreen_effect_get_target_rect (effect, &rect))
{
width = clutter_rect_get_width (&rect);
height = clutter_rect_get_height (&rect);
}
else
clutter_actor_get_size (actor, &width, &height);
/* XXX ideally, the sub-classes should tell us what they
* changed in the texture vertices; we then would be able to
* avoid resubmitting the same data, if it did not change. for
* the time being, we resubmit everything
*/
verts = cogl_buffer_map (COGL_BUFFER (priv->buffer),
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD);
/* If the map failed then we'll resort to allocating a temporary
buffer */
if (verts == NULL)
{
mapped_buffer = FALSE;
verts = g_malloc (sizeof (*verts) * priv->n_vertices);
}
else
mapped_buffer = TRUE;
for (i = 0; i < priv->y_tiles + 1; i++)
{
for (j = 0; j < priv->x_tiles + 1; j++)
{
CoglVertexP3T2C4 *vertex_out;
CoglTextureVertex vertex;
/* CoglTextureVertex isn't an ideal structure to use for
this because it contains a CoglColor. The internal
layout of CoglColor is mean to be private so Clutter
can not pass a pointer to it as a vertex
attribute. Also it contains padding so we end up
storing more data in the vertex buffer than we need
to. Instead we let the application modify a dummy
vertex and then copy the details back out to a more
well-defined struct */
vertex.tx = (float) j / priv->x_tiles;
vertex.ty = (float) i / priv->y_tiles;
vertex.x = width * vertex.tx;
vertex.y = height * vertex.ty;
vertex.z = 0.0f;
cogl_color_init_from_4ub (&vertex.color, 255, 255, 255, opacity);
clutter_deform_effect_deform_vertex (self,
width, height,
&vertex);
vertex_out = verts + i * (priv->x_tiles + 1) + j;
vertex_out->x = vertex.x;
vertex_out->y = vertex.y;
vertex_out->z = vertex.z;
vertex_out->s = vertex.tx;
vertex_out->t = vertex.ty;
vertex_out->r = cogl_color_get_red_byte (&vertex.color);
vertex_out->g = cogl_color_get_green_byte (&vertex.color);
vertex_out->b = cogl_color_get_blue_byte (&vertex.color);
vertex_out->a = cogl_color_get_alpha_byte (&vertex.color);
}
}
if (mapped_buffer)
cogl_buffer_unmap (COGL_BUFFER (priv->buffer));
else
{
cogl_buffer_set_data (COGL_BUFFER (priv->buffer),
0, /* offset */
verts,
sizeof (*verts) * priv->n_vertices);
g_free (verts);
}
priv->is_dirty = FALSE;
}
material = clutter_offscreen_effect_get_target (effect);
pipeline = COGL_PIPELINE (material);
/* enable depth testing */
cogl_depth_state_init (&depth_state);
cogl_depth_state_set_test_enabled (&depth_state, TRUE);
cogl_pipeline_set_depth_state (pipeline, &depth_state, NULL);
/* enable backface culling if we have a back material */
if (priv->back_pipeline != NULL)
cogl_pipeline_set_cull_face_mode (pipeline,
COGL_PIPELINE_CULL_FACE_MODE_BACK);
/* draw the front */
if (material != NULL)
cogl_framebuffer_draw_primitive (fb, pipeline, priv->primitive);
/* draw the back */
if (priv->back_pipeline != NULL)
{
CoglPipeline *back_pipeline;
/* We probably shouldn't be modifying the user's material so
instead we make a temporary copy */
back_pipeline = cogl_pipeline_copy (priv->back_pipeline);
cogl_pipeline_set_depth_state (back_pipeline, &depth_state, NULL);
cogl_pipeline_set_cull_face_mode (back_pipeline,
COGL_PIPELINE_CULL_FACE_MODE_FRONT);
cogl_framebuffer_draw_primitive (fb, back_pipeline, priv->primitive);
cogl_object_unref (back_pipeline);
}
if (G_UNLIKELY (priv->lines_primitive != NULL))
{
CoglContext *ctx =
clutter_backend_get_cogl_context (clutter_get_default_backend ());
CoglPipeline *lines_pipeline = cogl_pipeline_new (ctx);
cogl_pipeline_set_color4f (lines_pipeline, 1.0, 0, 0, 1.0);
cogl_framebuffer_draw_primitive (fb, lines_pipeline,
priv->lines_primitive);
cogl_object_unref (lines_pipeline);
}
}
void
test_map_buffer_range (void)
{
CoglTexture2D *tex;
CoglPipeline *pipeline;
int fb_width, fb_height;
CoglAttributeBuffer *buffer;
CoglVertexP2T2 *data;
CoglAttribute *pos_attribute;
CoglAttribute *tex_coord_attribute;
CoglPrimitive *primitive;
tex = cogl_texture_2d_new_from_data (test_ctx,
2, 2, /* width/height */
COGL_PIXEL_FORMAT_RGBA_8888_PRE,
COGL_PIXEL_FORMAT_ANY,
2 * 4, /* rowstride */
tex_data,
NULL /* error */);
pipeline = cogl_pipeline_new (test_ctx);
cogl_pipeline_set_layer_texture (pipeline, 0, COGL_TEXTURE (tex));
cogl_pipeline_set_layer_filters (pipeline,
0, /* layer */
COGL_PIPELINE_FILTER_NEAREST,
COGL_PIPELINE_FILTER_NEAREST);
cogl_pipeline_set_layer_wrap_mode (pipeline,
0, /* layer */
COGL_PIPELINE_WRAP_MODE_CLAMP_TO_EDGE);
fb_width = cogl_framebuffer_get_width (test_fb);
fb_height = cogl_framebuffer_get_height (test_fb);
buffer = cogl_attribute_buffer_new (test_ctx,
sizeof (vertex_data),
vertex_data);
/* Replace the texture coordinates of the third vertex with the
* coordinates for a green texel */
data = cogl_buffer_map_range (COGL_BUFFER (buffer),
sizeof (vertex_data[0]) * 2,
sizeof (vertex_data[0]),
COGL_BUFFER_ACCESS_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD_RANGE,
NULL); /* don't catch errors */
g_assert (data != NULL);
data->x = vertex_data[2].x;
data->y = vertex_data[2].y;
data->s = 1.0f;
data->t = 0.0f;
cogl_buffer_unmap (COGL_BUFFER (buffer));
pos_attribute =
cogl_attribute_new (buffer,
"cogl_position_in",
sizeof (vertex_data[0]),
offsetof (CoglVertexP2T2, x),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
tex_coord_attribute =
cogl_attribute_new (buffer,
"cogl_tex_coord_in",
sizeof (vertex_data[0]),
offsetof (CoglVertexP2T2, s),
2, /* n_components */
COGL_ATTRIBUTE_TYPE_FLOAT);
cogl_framebuffer_clear4f (test_fb,
COGL_BUFFER_BIT_COLOR,
0, 0, 0, 1);
primitive =
cogl_primitive_new (COGL_VERTICES_MODE_TRIANGLE_STRIP,
4, /* n_vertices */
pos_attribute,
tex_coord_attribute,
NULL);
cogl_primitive_draw (primitive, test_fb, pipeline);
cogl_object_unref (primitive);
/* Top left pixel should be the one that is replaced to be green */
test_utils_check_pixel (test_fb, 1, 1, 0x00ff00ff);
/* The other three corners should be left as red */
test_utils_check_pixel (test_fb, fb_width - 2, 1, 0xff0000ff);
test_utils_check_pixel (test_fb, 1, fb_height - 2, 0xff0000ff);
test_utils_check_pixel (test_fb, fb_width - 2, fb_height - 2, 0xff0000ff);
cogl_object_unref (buffer);
cogl_object_unref (pos_attribute);
cogl_object_unref (tex_coord_attribute);
cogl_object_unref (pipeline);
cogl_object_unref (tex);
if (cogl_test_verbose ())
g_print ("OK\n");
}
static void
clutter_canvas_emit_draw (ClutterCanvas *self)
{
ClutterCanvasPrivate *priv = self->priv;
int real_width, real_height;
cairo_surface_t *surface;
gboolean mapped_buffer;
unsigned char *data;
CoglBuffer *buffer;
int window_scale = 1;
gboolean res;
cairo_t *cr;
g_assert (priv->height > 0 && priv->width > 0);
priv->dirty = TRUE;
if (priv->scale_factor_set)
window_scale = priv->scale_factor;
else
g_object_get (clutter_settings_get_default (),
"window-scaling-factor", &window_scale,
NULL);
real_width = priv->width * window_scale;
real_height = priv->height * window_scale;
CLUTTER_NOTE (MISC, "Creating Cairo surface with size %d x %d (real: %d x %d, scale: %d)",
priv->width, priv->height,
real_width, real_height,
window_scale);
if (priv->buffer == NULL)
{
CoglContext *ctx;
ctx = clutter_backend_get_cogl_context (clutter_get_default_backend ());
priv->buffer = cogl_bitmap_new_with_size (ctx,
real_width,
real_height,
CLUTTER_CAIRO_FORMAT_ARGB32);
}
buffer = COGL_BUFFER (cogl_bitmap_get_buffer (priv->buffer));
if (buffer == NULL)
return;
cogl_buffer_set_update_hint (buffer, COGL_BUFFER_UPDATE_HINT_DYNAMIC);
data = cogl_buffer_map (buffer,
COGL_BUFFER_ACCESS_READ_WRITE,
COGL_BUFFER_MAP_HINT_DISCARD);
if (data != NULL)
{
int bitmap_stride = cogl_bitmap_get_rowstride (priv->buffer);
surface = cairo_image_surface_create_for_data (data,
CAIRO_FORMAT_ARGB32,
real_width,
real_height,
bitmap_stride);
mapped_buffer = TRUE;
}
else
{
surface = cairo_image_surface_create (CAIRO_FORMAT_ARGB32,
real_width,
real_height);
mapped_buffer = FALSE;
}
cairo_surface_set_device_scale (surface, window_scale, window_scale);
self->priv->cr = cr = cairo_create (surface);
g_signal_emit (self, canvas_signals[DRAW], 0,
cr, priv->width, priv->height,
&res);
#ifdef CLUTTER_ENABLE_DEBUG
if (_clutter_diagnostic_enabled () && cairo_status (cr))
{
g_warning ("Drawing failed for <ClutterCanvas>[%p]: %s",
self,
cairo_status_to_string (cairo_status (cr)));
}
#endif
self->priv->cr = NULL;
cairo_destroy (cr);
if (mapped_buffer)
cogl_buffer_unmap (buffer);
else
{
int size = cairo_image_surface_get_stride (surface) * priv->height;
cogl_buffer_set_data (buffer,
0,
cairo_image_surface_get_data (surface),
size);
}
cairo_surface_destroy (surface);
}
