feat: add functions required by SwayFX (#35)

2 files changed, 137 insertions, 0 deletions

diff --git a/include/scenefx/render/fx_renderer/fx_effect_framebuffers.h b/include/scenefx/render/fx_renderer/fx_effect_framebuffers.h
new file mode 100644
index 0000000..566884a
--- /dev/null
+++ b/include/scenefx/render/fx_renderer/fx_effect_framebuffers.h
@@ -0,0 +1,29 @@
+#ifndef _FX_EFFECT_FRAMEBUFFERS_H
+#define _FX_EFFECT_FRAMEBUFFERS_H
+
+#include <wlr/types/wlr_output.h>
+#include <wlr/util/addon.h>
+
+/**
+ * Used to add effect framebuffers per output instead of every output sharing
+ * them.
+ */
+struct fx_effect_framebuffers {
+	struct wlr_addon addon;
+
+	// Contains the blurred background for tiled windows
+	struct fx_framebuffer *optimized_blur_buffer;
+	// Contains the original pixels to draw over the areas where artifact are visible
+	struct fx_framebuffer *blur_saved_pixels_buffer;
+	// Blur swaps between the two effects buffers everytime it scales the image
+	// Buffer used for effects
+	struct fx_framebuffer *effects_buffer;
+	// Swap buffer used for effects
+	struct fx_framebuffer *effects_buffer_swapped;
+
+	bool blur_buffer_dirty;
+};
+
+struct fx_effect_framebuffers *fx_effect_framebuffers_try_get(struct wlr_output *output);
+
+#endif
diff --git a/include/scenefx/render/fx_renderer/fx_renderer.h b/include/scenefx/render/fx_renderer/fx_renderer.h
new file mode 100644
index 0000000..9c7839f
--- /dev/null
+++ b/include/scenefx/render/fx_renderer/fx_renderer.h
@@ -0,0 +1,108 @@
+#ifndef SCENEFX_FX_OPENGL_H
+#define SCENEFX_FX_OPENGL_H
+
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+#include <wlr/backend.h>
+#include <wlr/render/interface.h>
+#include <wlr/types/wlr_buffer.h>
+
+#include "render/fx_renderer/shaders.h"
+
+struct wlr_renderer *fx_renderer_create_with_drm_fd(int drm_fd);
+struct wlr_renderer *fx_renderer_create(struct wlr_backend *backend);
+
+struct fx_renderer *fx_get_renderer(
+	struct wlr_renderer *wlr_renderer);
+
+//
+// fx_texture
+//
+
+struct fx_texture_attribs {
+	GLenum target; /* either GL_TEXTURE_2D or GL_TEXTURE_EXTERNAL_OES */
+	GLuint tex;
+
+	bool has_alpha;
+};
+
+///
+/// fx_renderer
+///
+
+// TODO: make this private
+struct fx_renderer {
+	struct wlr_renderer wlr_renderer;
+
+	float projection[9];
+	struct wlr_egl *egl;
+	int drm_fd;
+
+	const char *exts_str;
+	struct {
+		bool EXT_read_format_bgra;
+		bool KHR_debug;
+		bool OES_egl_image_external;
+		bool OES_egl_image;
+		bool EXT_texture_type_2_10_10_10_REV;
+		bool OES_texture_half_float_linear;
+		bool EXT_texture_norm16;
+		bool EXT_disjoint_timer_query;
+	} exts;
+
+	struct {
+		PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES;
+		PFNGLDEBUGMESSAGECALLBACKKHRPROC glDebugMessageCallbackKHR;
+		PFNGLDEBUGMESSAGECONTROLKHRPROC glDebugMessageControlKHR;
+		PFNGLPOPDEBUGGROUPKHRPROC glPopDebugGroupKHR;
+		PFNGLPUSHDEBUGGROUPKHRPROC glPushDebugGroupKHR;
+		PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC glEGLImageTargetRenderbufferStorageOES;
+		PFNGLGETGRAPHICSRESETSTATUSKHRPROC glGetGraphicsResetStatusKHR;
+		PFNGLGENQUERIESEXTPROC glGenQueriesEXT;
+		PFNGLDELETEQUERIESEXTPROC glDeleteQueriesEXT;
+		PFNGLQUERYCOUNTEREXTPROC glQueryCounterEXT;
+		PFNGLGETQUERYOBJECTIVEXTPROC glGetQueryObjectivEXT;
+		PFNGLGETQUERYOBJECTUI64VEXTPROC glGetQueryObjectui64vEXT;
+		PFNGLGETINTEGER64VEXTPROC glGetInteger64vEXT;
+	} procs;
+
+	struct {
+		struct quad_shader quad;
+		struct quad_round_shader quad_round;
+		struct quad_round_shader quad_round_tl;
+		struct quad_round_shader quad_round_tr;
+		struct quad_round_shader quad_round_bl;
+		struct quad_round_shader quad_round_br;
+		struct tex_shader tex_rgba;
+		struct tex_shader tex_rgbx;
+		struct tex_shader tex_ext;
+		struct box_shadow_shader box_shadow;
+		struct rounded_border_corner_shader rounded_border_corner;
+		struct stencil_mask_shader stencil_mask;
+		struct blur_shader blur1;
+		struct blur_shader blur2;
+		struct blur_effects_shader blur_effects;
+	} shaders;
+
+	struct wl_list buffers; // fx_framebuffer.link
+	struct wl_list textures; // fx_texture.link
+
+	struct fx_framebuffer *current_buffer;
+	uint32_t viewport_width, viewport_height;
+
+	// Set to true when 'wlr_renderer_begin_buffer_pass' is called instead of
+	// our custom 'fx_renderer_begin_buffer_pass' function
+	bool basic_renderer;
+
+	// The region where there's blur
+	pixman_region32_t blur_padding_region;
+};
+
+
+struct wlr_texture *fx_texture_from_buffer(struct wlr_renderer *wlr_renderer,
+		struct wlr_buffer *buffer);
+
+void fx_texture_get_attribs(struct wlr_texture *texture,
+	struct fx_texture_attribs *attribs);
+
+#endif