[FX Renderer] Add blur (#30)

* Initial blur implementation

* Added additional blur effects from SwayFX

* Simplified blur pass functions to match the other pass functions

* Minor fixes

* Added support for optimized blur

* tinywl: Don't set decoration values every frame

* Updated public blur function docs

* Simplified blur buffer management

* Moved ignore transparent bool into a per buffer option

* Clip the scene_buffer when blur is enabled

* Added back corner and shadow checks in opaque_region function

* Renamed fx_render_blur_options to fx_render_blur_pass_options

* Fixed nits

* Removed unused fx_framebuffer_bind_wlr_fbo function

* Removed wlr_scene impl. Should be moved into future PR instead

* Made blur impl independent of wlr_scene

* Moved shader init back into fx_renderer.c

* Renamed fx_framebuffer_get_or_create_bufferless to fx_framebuffer_get_or_create_custom

1 files changed, 35 insertions, 1 deletions

diff --git a/include/render/fx_renderer/shaders.h b/include/render/fx_renderer/shaders.h
index 92a14d5..226dd36 100644
--- a/include/render/fx_renderer/shaders.h
+++ b/include/render/fx_renderer/shaders.h
@@ -27,6 +27,8 @@ struct quad_shader {
 	GLint pos_attrib;
 };
 
+bool link_quad_program(struct quad_shader *shader);
+
 struct tex_shader {
 	GLuint program;
 	GLint proj;
@@ -37,8 +39,11 @@ struct tex_shader {
 	GLint size;
 	GLint position;
 	GLint radius;
+	GLint discard_transparent;
 };
 
+bool link_tex_program(struct tex_shader *shader, enum fx_tex_shader_source source);
+
 struct stencil_mask_shader {
 	GLuint program;
 	GLint proj;
@@ -49,6 +54,8 @@ struct stencil_mask_shader {
 	GLint radius;
 };
 
+bool link_stencil_mask_program(struct stencil_mask_shader *shader);
+
 struct box_shadow_shader {
 	GLuint program;
 	GLint proj;
@@ -60,6 +67,33 @@ struct box_shadow_shader {
 	GLint corner_radius;
 };
 
-bool link_shaders(struct fx_renderer *renderer);
+bool link_box_shadow_program(struct box_shadow_shader *shader);
+
+struct blur_shader {
+	GLuint program;
+	GLint proj;
+	GLint tex_proj;
+	GLint tex;
+	GLint pos_attrib;
+	GLint radius;
+	GLint halfpixel;
+};
+
+bool link_blur1_program(struct blur_shader *shader);
+bool link_blur2_program(struct blur_shader *shader);
+
+struct blur_effects_shader {
+	GLuint program;
+	GLint proj;
+	GLint tex_proj;
+	GLint tex;
+	GLint pos_attrib;
+	GLfloat noise;
+	GLfloat brightness;
+	GLfloat contrast;
+	GLfloat saturation;
+};
+
+bool link_blur_effects_program(struct blur_effects_shader *shader);
 
 #endif