2.0. image_mixer: Refactored blend-modes.

[casparcg] / core / mixer / image / image_kernel.cpp

diff --git a/core/mixer/image/image_kernel.cpp b/core/mixer/image/image_kernel.cpp
index dae98a0e0bec41535e52591fadd939d63536ed55..4a837172d2581cb08d3e103fdfa1e55c04c0f515 100644 (file)
--- a/core/mixer/image/image_kernel.cpp
+++ b/core/mixer/image/image_kernel.cpp
@@ -59,7 +59,7 @@ GLubyte lower_pattern[] = {
 struct image_kernel::implementation : boost::noncopyable\r
 {      \r
        std::shared_ptr<shader> shader_;\r
-       bool                                    advanced_blend_modes_;\r
+       bool                                    blend_modes_;\r
                                                        \r
        void draw(ogl_device&                                                                   ogl,\r
                          render_item&&                                                                 item,\r
@@ -97,7 +97,7 @@ struct image_kernel::implementation : boost::noncopyable
                // Setup shader\r
 \r
                if(!shader_)\r
-                       shader_ = get_image_shader(ogl, advanced_blend_modes_);\r
+                       shader_ = get_image_shader(ogl, blend_modes_);\r
                                                \r
                ogl.use(*shader_);\r
 \r
@@ -111,30 +111,28 @@ struct image_kernel::implementation : boost::noncopyable
                shader_->set("has_local_key",   local_key);\r
                shader_->set("has_layer_key",   layer_key);\r
                shader_->set("pixel_format",    item.pix_desc.pix_fmt); \r
-               shader_->set("opacity",                 item.transform.get_opacity());  \r
+               shader_->set("opacity",                 item.transform.get_is_key() ? 1.0 : item.transform.get_opacity());      \r
                \r
                // Setup blend_func\r
                \r
-               if(advanced_blend_modes_)\r
+               if(item.transform.get_is_key())\r
+                       item.blend_mode = blend_mode::normal;\r
+\r
+               if(blend_modes_)\r
                {\r
                        background->bind(6);\r
 \r
                        shader_->set("background",      texture_id::background);\r
-                       shader_->set("blend_mode",      item.transform.get_is_key() ? core::image_transform::blend_mode::normal : item.transform.get_blend_mode());\r
+                       shader_->set("blend_mode",      item.blend_mode);\r
                }\r
                else\r
                {\r
-                       switch(item.transform.get_blend_mode())\r
+                       switch(item.blend_mode)\r
                        {\r
-                       case image_transform::blend_mode::add:                  \r
-                               ogl.blend_func_separate(GL_ONE, GL_ONE, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);\r
-                               break;\r
-                       case image_transform::blend_mode::replace:                      \r
+                       case blend_mode::replace:                       \r
                                ogl.blend_func_separate(GL_ONE, GL_ZERO, GL_ONE, GL_ONE);\r
                                break;\r
-                       case image_transform::blend_mode::screen:\r
-                               ogl.blend_func_separate(GL_ONE, GL_ONE_MINUS_SRC_COLOR, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);\r
-                       case image_transform::blend_mode::normal:\r
+                       case blend_mode::normal:\r
                        default:\r
                                ogl.blend_func_separate(GL_ONE, GL_ONE_MINUS_SRC_ALPHA, GL_ONE, GL_ONE_MINUS_SRC_ALPHA);\r
                                break;\r
@@ -230,7 +228,7 @@ struct image_kernel::implementation : boost::noncopyable
                item.textures.clear();\r
                ogl.yield(); // Return resources to pool as early as possible.\r
 \r
-               if(advanced_blend_modes_)\r
+               if(blend_modes_)\r
                {\r
                        // http://www.opengl.org/registry/specs/NV/texture_barrier.txt\r
                        // This allows us to use framebuffer (background) both as source and target while blending.\r
@@ -240,7 +238,11 @@ struct image_kernel::implementation : boost::noncopyable
 };\r
 \r
 image_kernel::image_kernel() : impl_(new implementation()){}\r
-void image_kernel::draw(ogl_device& ogl, render_item&& item, const safe_ptr<device_buffer>& background, const std::shared_ptr<device_buffer>& local_key, const std::shared_ptr<device_buffer>& layer_key)\r
+void image_kernel::draw(ogl_device& ogl, \r
+                                               render_item&& item, \r
+                                               const safe_ptr<device_buffer>& background,\r
+                                               const std::shared_ptr<device_buffer>& local_key, \r
+                                               const std::shared_ptr<device_buffer>& layer_key)\r
 {\r
        impl_->draw(ogl, std::move(item), background, local_key, layer_key);\r
 }\r