mirror of https://github.com/yshui/picom.git
281 lines
9.0 KiB
C
281 lines
9.0 KiB
C
// SPDX-License-Identifier: MPL-2.0
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// Copyright (c) Yuxuan Shui <yshuiv7@gmail.com>
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#pragma once
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#include <epoxy/gl.h>
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#include <stdbool.h>
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#include <string.h>
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#include <xcb/xproto.h>
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#include "backend/backend.h"
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#include "backend/backend_common.h"
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#include "log.h"
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#include "region.h"
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#define CASESTRRET(s) \
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case s: return #s
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struct gl_blur_context;
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static inline GLint glGetUniformLocationChecked(GLuint p, const char *name) {
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auto ret = glGetUniformLocation(p, name);
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if (ret < 0) {
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log_info("Failed to get location of uniform '%s'. This is normal when "
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"using custom shaders.",
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name);
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}
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return ret;
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}
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#define bind_uniform(shader, uniform) \
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(shader)->uniform_##uniform = glGetUniformLocationChecked((shader)->prog, #uniform)
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// Program and uniforms for window shader
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typedef struct {
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GLuint prog;
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GLint uniform_opacity;
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GLint uniform_invert_color;
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GLint uniform_tex;
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GLint uniform_effective_size;
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GLint uniform_dim;
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GLint uniform_brightness;
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GLint uniform_max_brightness;
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GLint uniform_corner_radius;
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GLint uniform_border_width;
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GLint uniform_time;
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GLint uniform_mask_tex;
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GLint uniform_mask_offset;
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GLint uniform_mask_corner_radius;
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GLint uniform_mask_inverted;
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} gl_win_shader_t;
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// Program and uniforms for brightness shader
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typedef struct {
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GLuint prog;
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} gl_brightness_shader_t;
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typedef struct {
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GLuint prog;
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GLint uniform_color;
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} gl_shadow_shader_t;
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// Program and uniforms for blur shader
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typedef struct {
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GLuint prog;
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GLint uniform_pixel_norm;
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GLint uniform_opacity;
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GLint texorig_loc;
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GLint scale_loc;
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GLint uniform_mask_tex;
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GLint uniform_mask_offset;
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GLint uniform_mask_corner_radius;
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GLint uniform_mask_inverted;
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} gl_blur_shader_t;
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typedef struct {
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GLuint prog;
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GLint color_loc;
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} gl_fill_shader_t;
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/// @brief Wrapper of a bound GL texture.
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struct gl_texture {
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int refcount;
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bool has_alpha;
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GLuint texture;
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int width, height;
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bool y_inverted;
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xcb_pixmap_t pixmap;
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// Textures for auxiliary uses.
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GLuint auxiliary_texture[2];
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const gl_win_shader_t *shader;
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void *user_data;
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};
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struct gl_data {
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backend_t base;
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// If we are using proprietary NVIDIA driver
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bool is_nvidia;
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// If ARB_robustness extension is present
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bool has_robustness;
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// If EXT_EGL_image_storage extension is present
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bool has_egl_image_storage;
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// Height and width of the root window
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int height, width;
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// Hash-table of window shaders
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gl_win_shader_t *default_shader;
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gl_brightness_shader_t brightness_shader;
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gl_fill_shader_t fill_shader;
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gl_shadow_shader_t shadow_shader;
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GLuint back_texture, back_fbo;
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GLint back_format;
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GLuint frame_timing[2];
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int current_frame_timing;
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GLuint present_prog;
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GLuint dummy_prog;
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bool dithered_present;
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GLuint default_mask_texture;
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/// Called when an gl_texture is decoupled from the texture it refers. Returns
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/// the decoupled user_data
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void *(*decouple_texture_user_data)(backend_t *base, void *user_data);
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/// Release the user data attached to a gl_texture
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void (*release_user_data)(backend_t *base, struct gl_texture *);
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struct log_target *logger;
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};
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typedef struct session session_t;
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#define GL_PROG_MAIN_INIT \
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{ .prog = 0, .unifm_opacity = -1, .unifm_invert_color = -1, .unifm_tex = -1, }
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void gl_prepare(backend_t *base, const region_t *reg);
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void x_rect_to_coords(int nrects, const rect_t *rects, coord_t image_dst,
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int extent_height, int texture_height, int root_height,
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bool y_inverted, GLint *coord, GLuint *indices);
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GLuint gl_create_shader(GLenum shader_type, const char *shader_str);
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GLuint gl_create_program(const GLuint *const shaders, int nshaders);
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GLuint gl_create_program_from_str(const char *vert_shader_str, const char *frag_shader_str);
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GLuint gl_create_program_from_strv(const char **vert_shaders, const char **frag_shaders);
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void *gl_create_window_shader(backend_t *backend_data, const char *source);
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void gl_destroy_window_shader(backend_t *backend_data, void *shader);
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uint64_t gl_get_shader_attributes(backend_t *backend_data, void *shader);
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bool gl_set_image_property(backend_t *backend_data, enum image_properties prop,
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image_handle image, const void *args);
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bool gl_last_render_time(backend_t *backend_data, struct timespec *time);
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/**
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* @brief Render a region with texture data.
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*/
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void gl_compose(backend_t *, image_handle image, coord_t image_dst, image_handle mask,
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coord_t mask_dst, const region_t *reg_tgt, const region_t *reg_visible);
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void gl_root_change(backend_t *base, session_t *);
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void gl_resize(struct gl_data *, int width, int height);
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bool gl_init(struct gl_data *gd, session_t *);
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void gl_deinit(struct gl_data *gd);
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GLuint gl_new_texture(GLenum target);
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bool gl_image_op(backend_t *base, enum image_operations op, image_handle image,
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const region_t *reg_op, const region_t *reg_visible, void *arg);
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xcb_pixmap_t gl_release_image(backend_t *base, image_handle image);
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image_handle gl_make_mask(backend_t *base, geometry_t size, const region_t *reg);
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image_handle gl_clone(backend_t *base, image_handle image, const region_t *reg_visible);
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bool gl_blur(backend_t *base, double opacity, void *ctx, image_handle mask,
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coord_t mask_dst, const region_t *reg_blur, const region_t *reg_visible);
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bool gl_blur_impl(double opacity, struct gl_blur_context *bctx,
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struct backend_image *mask, coord_t mask_dst, const region_t *reg_blur,
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const region_t *reg_visible attr_unused, GLuint source_texture,
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geometry_t source_size, GLuint target_fbo, GLuint default_mask,
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bool high_precision);
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void *gl_create_blur_context(backend_t *base, enum blur_method, void *args);
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void gl_destroy_blur_context(backend_t *base, void *ctx);
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struct backend_shadow_context *gl_create_shadow_context(backend_t *base, double radius);
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void gl_destroy_shadow_context(backend_t *base attr_unused, struct backend_shadow_context *ctx);
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image_handle gl_shadow_from_mask(backend_t *base, image_handle mask,
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struct backend_shadow_context *sctx, struct color color);
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void gl_get_blur_size(void *blur_context, int *width, int *height);
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void gl_fill(backend_t *base, struct color, const region_t *clip);
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void gl_present(backend_t *base, const region_t *);
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enum device_status gl_device_status(backend_t *base);
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/**
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* Get a textual representation of an OpenGL error.
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*/
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static inline const char *gl_get_err_str(GLenum err) {
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switch (err) {
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CASESTRRET(GL_NO_ERROR);
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CASESTRRET(GL_INVALID_ENUM);
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CASESTRRET(GL_INVALID_VALUE);
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CASESTRRET(GL_INVALID_OPERATION);
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CASESTRRET(GL_INVALID_FRAMEBUFFER_OPERATION);
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CASESTRRET(GL_OUT_OF_MEMORY);
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CASESTRRET(GL_STACK_UNDERFLOW);
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CASESTRRET(GL_STACK_OVERFLOW);
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CASESTRRET(GL_FRAMEBUFFER_UNDEFINED);
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CASESTRRET(GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT);
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CASESTRRET(GL_FRAMEBUFFER_INCOMPLETE_MISSING_ATTACHMENT);
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CASESTRRET(GL_FRAMEBUFFER_INCOMPLETE_DRAW_BUFFER);
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CASESTRRET(GL_FRAMEBUFFER_INCOMPLETE_READ_BUFFER);
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CASESTRRET(GL_FRAMEBUFFER_UNSUPPORTED);
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CASESTRRET(GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE);
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CASESTRRET(GL_FRAMEBUFFER_INCOMPLETE_LAYER_TARGETS);
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}
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return NULL;
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}
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/**
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* Check for GL error.
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*
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* http://blog.nobel-joergensen.com/2013/01/29/debugging-opengl-using-glgeterror/
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*/
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static inline void gl_check_err_(const char *func, int line) {
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GLenum err = GL_NO_ERROR;
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while (GL_NO_ERROR != (err = glGetError())) {
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const char *errtext = gl_get_err_str(err);
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if (errtext) {
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log_printf(tls_logger, LOG_LEVEL_ERROR, func,
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"GL error at line %d: %s", line, errtext);
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} else {
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log_printf(tls_logger, LOG_LEVEL_ERROR, func,
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"GL error at line %d: %d", line, err);
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}
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}
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}
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static inline void gl_clear_err(void) {
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while (glGetError() != GL_NO_ERROR)
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;
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}
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#define gl_check_err() gl_check_err_(__func__, __LINE__)
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/**
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* Check for GL framebuffer completeness.
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*/
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static inline bool gl_check_fb_complete_(const char *func, int line, GLenum fb) {
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GLenum status = glCheckFramebufferStatus(fb);
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if (status == GL_FRAMEBUFFER_COMPLETE) {
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return true;
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}
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const char *stattext = gl_get_err_str(status);
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if (stattext) {
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log_printf(tls_logger, LOG_LEVEL_ERROR, func,
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"Framebuffer attachment failed at line %d: %s", line, stattext);
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} else {
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log_printf(tls_logger, LOG_LEVEL_ERROR, func,
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"Framebuffer attachment failed at line %d: %d", line, status);
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}
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return false;
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}
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#define gl_check_fb_complete(fb) gl_check_fb_complete_(__func__, __LINE__, (fb))
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static const GLuint vert_coord_loc = 0;
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static const GLuint vert_in_texcoord_loc = 1;
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#define GLSL(version, ...) "#version " #version "\n" #__VA_ARGS__
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#define QUOTE(...) #__VA_ARGS__
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extern const char vertex_shader[], blend_with_mask_frag[], masking_glsl[], dummy_frag[],
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present_frag[], fill_frag[], fill_vert[], interpolating_frag[], interpolating_vert[],
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win_shader_glsl[], win_shader_default[], present_vertex_shader[], dither_glsl[],
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shadow_colorization_frag[];
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