#include "../include/cursor.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #include <assert.h> #include <X11/extensions/Xfixes.h> // TODO: Test cursor visibility with XFixesHideCursor static bool gsr_cursor_set_from_x11_cursor_image(gsr_cursor *self, XFixesCursorImage *x11_cursor_image, bool *visible) { uint8_t *cursor_data = NULL; uint8_t *out = NULL; *visible = false; if(!x11_cursor_image) goto err; if(!x11_cursor_image->pixels) goto err; self->hotspot.x = x11_cursor_image->xhot; self->hotspot.y = x11_cursor_image->yhot; self->egl->glBindTexture(GL_TEXTURE_2D, self->texture_id); self->size.x = x11_cursor_image->width; self->size.y = x11_cursor_image->height; const unsigned long *pixels = x11_cursor_image->pixels; cursor_data = malloc(self->size.x * self->size.y * 4); if(!cursor_data) goto err; out = cursor_data; /* Un-premultiply alpha */ for(int y = 0; y < self->size.y; ++y) { for(int x = 0; x < self->size.x; ++x) { uint32_t pixel = *pixels++; uint8_t *in = (uint8_t*)&pixel; uint8_t alpha = in[3]; if(alpha == 0) { alpha = 1; } else { *visible = true; } out[0] = (float)in[2] * 255.0/(float)alpha; out[1] = (float)in[1] * 255.0/(float)alpha; out[2] = (float)in[0] * 255.0/(float)alpha; out[3] = in[3]; out += 4; in += 4; } } // TODO: glTextureSubImage2D if same size self->egl->glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA8, self->size.x, self->size.y, 0, GL_RGBA, GL_UNSIGNED_BYTE, cursor_data); free(cursor_data); self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE); self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE); self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); self->egl->glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); self->egl->glBindTexture(GL_TEXTURE_2D, 0); XFree(x11_cursor_image); return true; err: self->egl->glBindTexture(GL_TEXTURE_2D, 0); if(x11_cursor_image) XFree(x11_cursor_image); return false; } int gsr_cursor_init(gsr_cursor *self, gsr_egl *egl, Display *display) { int x_fixes_error_base = 0; assert(egl); assert(display); memset(self, 0, sizeof(*self)); self->egl = egl; self->display = display; self->x_fixes_event_base = 0; if(!XFixesQueryExtension(self->display, &self->x_fixes_event_base, &x_fixes_error_base)) { fprintf(stderr, "gsr error: gsr_cursor_init: your X11 server is missing the XFixes extension\n"); gsr_cursor_deinit(self); return -1; } self->egl->glGenTextures(1, &self->texture_id); XFixesSelectCursorInput(self->display, DefaultRootWindow(self->display), XFixesDisplayCursorNotifyMask); gsr_cursor_set_from_x11_cursor_image(self, XFixesGetCursorImage(self->display), &self->visible); self->cursor_image_set = true; return 0; } void gsr_cursor_deinit(gsr_cursor *self) { if(!self->egl) return; if(self->texture_id) { self->egl->glDeleteTextures(1, &self->texture_id); self->texture_id = 0; } if(self->display) XFixesSelectCursorInput(self->display, DefaultRootWindow(self->display), 0); self->display = NULL; self->egl = NULL; } bool gsr_cursor_on_event(gsr_cursor *self, XEvent *xev) { bool updated = false; if(xev->type == self->x_fixes_event_base + XFixesCursorNotify) { XFixesCursorNotifyEvent *cursor_notify_event = (XFixesCursorNotifyEvent*)xev; if(cursor_notify_event->subtype == XFixesDisplayCursorNotify && cursor_notify_event->window == DefaultRootWindow(self->display)) { self->cursor_image_set = false; } } if(!self->cursor_image_set) { self->cursor_image_set = true; gsr_cursor_set_from_x11_cursor_image(self, XFixesGetCursorImage(self->display), &self->visible); updated = true; } return updated; } void gsr_cursor_tick(gsr_cursor *self, Window relative_to) { Window dummy_window; int dummy_i; unsigned int dummy_u; XQueryPointer(self->display, relative_to, &dummy_window, &dummy_window, &dummy_i, &dummy_i, &self->position.x, &self->position.y, &dummy_u); }