#include <deque>\r
#include <unordered_map>\r
\r
-namespace caspar { namespace core {\r
- \r
-struct image_mixer::implementation : boost::noncopyable\r
-{ \r
- typedef std::deque<render_item> layer;\r
-\r
- video_channel_context& channel_;\r
-\r
- std::vector<image_transform> transform_stack_;\r
- std::stack<blend_mode::type> blend_mode_stack_;\r
+using namespace boost::assign;\r
\r
- std::deque<std::deque<render_item>> layers_; // layer/stream/items\r
+namespace caspar { namespace core {\r
\r
- image_kernel kernel_; \r
+typedef std::deque<render_item> layer;\r
\r
+class image_renderer\r
+{\r
+ video_channel_context& channel_; \r
+ image_kernel kernel_; \r
std::shared_ptr<device_buffer> active_buffer_;\r
public:\r
- implementation(video_channel_context& video_channel) \r
- : channel_(video_channel)\r
- , transform_stack_(1)\r
+ image_renderer(video_channel_context& channel)\r
+ : channel_(channel)\r
{\r
}\r
-\r
- ~implementation()\r
- {\r
- channel_.ogl().gc();\r
- }\r
\r
- void begin(core::basic_frame& frame)\r
- {\r
- transform_stack_.push_back(transform_stack_.back()*frame.get_image_transform());\r
- }\r
- \r
- void visit(core::write_frame& frame)\r
- { \r
- if(transform_stack_.back().get_field_mode() == field_mode::empty)\r
- return;\r
- \r
- core::render_item item;\r
- item.pix_desc = frame.get_pixel_format_desc();\r
- item.textures = frame.get_textures();\r
- item.transform = transform_stack_.back();\r
- item.tag = frame.tag();\r
- item.blend_mode = blend_mode_stack_.top(); \r
-\r
- auto& layer = layers_.back();\r
- if(boost::range::find(layer, item) == layer.end())\r
- layer.push_back(item);\r
- }\r
-\r
- void end()\r
- {\r
- transform_stack_.pop_back();\r
- }\r
-\r
- void begin_layer(blend_mode::type blend_mode)\r
- {\r
- blend_mode_stack_.push(blend_mode);\r
- layers_.push_back(layer());\r
- }\r
-\r
- void end_layer()\r
- {\r
- blend_mode_stack_.pop();\r
- }\r
- \r
- boost::unique_future<safe_ptr<host_buffer>> render()\r
+ boost::unique_future<safe_ptr<host_buffer>> render(std::deque<layer>&& layers)\r
{ \r
- auto layers = std::move(layers_);\r
+ auto layers2 = std::move(layers);\r
return channel_.ogl().begin_invoke([=]() mutable\r
{\r
- return render(std::move(layers));\r
+ return do_render(std::move(layers2));\r
});\r
}\r
\r
- safe_ptr<host_buffer> render(std::deque<layer>&& layers)\r
+private:\r
+ safe_ptr<host_buffer> do_render(std::deque<layer>&& layers)\r
{\r
std::shared_ptr<device_buffer> layer_key_buffer;\r
\r
\r
std::pair<int, std::shared_ptr<device_buffer>> local_key_buffer;\r
\r
- if(has_overlapping_items(layer, layer.front().blend_mode))\r
+ if(layer.front().blend_mode != blend_mode::normal && has_overlapping_items(layer))\r
{\r
- auto local_draw_buffer = create_device_buffer(4); \r
- auto local_blend_mode = layer.front().blend_mode;\r
+ auto layer_draw_buffer = create_device_buffer(4); \r
+ auto layer_blend_mode = layer.front().blend_mode;\r
\r
int fields = 0;\r
BOOST_FOREACH(auto& item, layer)\r
{\r
if(fields & item.transform.get_field_mode())\r
- item.blend_mode = blend_mode::normal; // Disable blending, it will be used when merging back into render stack.\r
+ item.blend_mode = blend_mode::normal; // Disable blending and just merge, it will be used when merging back into render stack.\r
else\r
{\r
item.blend_mode = blend_mode::replace; // Target field is empty, no blending, just copy\r
fields |= item.transform.get_field_mode();\r
}\r
\r
- draw_item(std::move(item), *local_draw_buffer, local_key_buffer, layer_key_buffer); \r
+ draw_item(std::move(item), *layer_draw_buffer, local_key_buffer, layer_key_buffer); \r
}\r
\r
render_item item;\r
- item.pix_desc.pix_fmt = pixel_format::bgra;\r
- item.pix_desc.planes.push_back(pixel_format_desc::plane(channel_.get_format_desc().width, channel_.get_format_desc().height, 4));\r
- item.textures.push_back(local_draw_buffer);\r
- item.blend_mode = local_blend_mode;\r
+ item.pix_desc.pix_fmt = pixel_format::bgra;\r
+ item.pix_desc.planes = list_of(pixel_format_desc::plane(channel_.get_format_desc().width, channel_.get_format_desc().height, 4));\r
+ item.textures = list_of(layer_draw_buffer);\r
+ item.transform = image_transform();\r
+ item.blend_mode = layer_blend_mode;\r
\r
kernel_.draw(channel_.ogl(), std::move(item), *draw_buffer, nullptr, nullptr);\r
}\r
}\r
}\r
\r
- //// TODO: Optimize\r
- bool has_overlapping_items(const layer& layer, blend_mode::type blend_mode)\r
+ bool has_overlapping_items(const layer& layer)\r
{\r
if(layer.size() < 2)\r
return false; \r
\r
- if(blend_mode == blend_mode::normal)\r
- return false;\r
- \r
- return std::any_of(layer.begin(), layer.end(), [&](const render_item& item)\r
+ auto upper_count = boost::range::count_if(layer, [&](const render_item& item)\r
+ {\r
+ return item.transform.get_field_mode() | field_mode::upper;\r
+ });\r
+\r
+ auto lower_count = boost::range::count_if(layer, [&](const render_item& item)\r
{\r
- return item.tag != layer.front().tag;\r
+ return item.transform.get_field_mode() | field_mode::lower;\r
});\r
\r
- //std::copy_if(layer.begin(), layer.end(), std::back_inserter(fill), [&](const render_item& item)\r
- //{\r
- // return !item.transform.get_is_key();\r
- //});\r
- // \r
- //if(blend_mode == blend_mode::normal) // only overlap if opacity\r
- //{\r
- // return std::any_of(fill.begin(), fill.end(), [&](const render_item& item)\r
- // {\r
- // return item.transform.get_opacity() < 1.0 - 0.001;\r
- // });\r
- //}\r
-\r
- //// simple solution, just check if we have differnt video streams / tags.\r
- //return std::any_of(fill.begin(), fill.end(), [&](const render_item& item)\r
- //{\r
- // return item.tag != fill.front().tag;\r
- //});\r
+ if(upper_count < 2 && lower_count < 2)\r
+ return false;\r
+\r
+ return true;\r
} \r
\r
safe_ptr<device_buffer> create_device_buffer(size_t stride)\r
channel_.ogl().clear(*buffer);\r
return buffer;\r
}\r
+};\r
+\r
+ \r
+struct image_mixer::implementation : boost::noncopyable\r
+{ \r
+ ogl_device& ogl_;\r
+ image_renderer renderer_;\r
+ std::vector<image_transform> transform_stack_;\r
+ blend_mode::type active_blend_mode_;\r
+ std::deque<std::deque<render_item>> layers_; // layer/stream/items\r
+public:\r
+ implementation(video_channel_context& video_channel) \r
+ : ogl_(video_channel.ogl())\r
+ , renderer_(video_channel)\r
+ , transform_stack_(1)\r
+ , active_blend_mode_(blend_mode::normal) \r
+ {\r
+ }\r
+\r
+ void begin_layer(blend_mode::type blend_mode)\r
+ {\r
+ active_blend_mode_ = blend_mode;\r
+ layers_ += layer();\r
+ }\r
+ \r
+ void begin(core::basic_frame& frame)\r
+ {\r
+ transform_stack_.push_back(transform_stack_.back()*frame.get_image_transform());\r
+ }\r
+ \r
+ void visit(core::write_frame& frame)\r
+ { \r
+ if(transform_stack_.back().get_field_mode() == field_mode::empty)\r
+ return;\r
+ \r
+ core::render_item item;\r
+ item.pix_desc = frame.get_pixel_format_desc();\r
+ item.textures = frame.get_textures();\r
+ item.transform = transform_stack_.back();\r
+ item.blend_mode = active_blend_mode_; \r
+\r
+ layers_.back() += item;\r
+ }\r
+\r
+ void end()\r
+ {\r
+ transform_stack_.pop_back();\r
+ }\r
+\r
+ void end_layer()\r
+ { \r
+ }\r
+ \r
+ boost::unique_future<safe_ptr<host_buffer>> render()\r
+ {\r
+ return renderer_.render(std::move(layers_));\r
+ }\r
\r
safe_ptr<write_frame> create_frame(const void* tag, const core::pixel_format_desc& desc)\r
{\r
- return make_safe<write_frame>(channel_.ogl(), tag, desc);\r
+ return make_safe<write_frame>(ogl_, tag, desc);\r
}\r
};\r
\r
projects / casparcg / commitdiff