x11: don't do silly content scale games

god fucking damnit wayland! aaaaaaaahh!!

src/gui/gui.c

@@ -54,7 +54,7 @@ dt_gui_win_init(dt_gui_win_t *win)
   int wd = 3*mode->width/4;
   int ht = 3*mode->height/4;
   glfwWindowHint(GLFW_CLIENT_API, GLFW_NO_API);
-  // glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_FALSE);
+  // glfwWindowHint(GLFW_SCALE_TO_MONITOR, GLFW_TRUE);
   // glfwWindowHint(GLFW_SCALE_FRAMEBUFFER, GLFW_TRUE);
   glfwWindowHint(GLFW_COCOA_RETINA_FRAMEBUFFER, GLFW_TRUE); // this is for github's super ancient ubuntu glfw 3.3
   glfwWindowHint(GLFW_DECORATED, GLFW_TRUE);
@@ -128,6 +128,8 @@ int dt_gui_init()
 {
   memset(&vkdt, 0, sizeof(vkdt));
   vkdt.graph_res = -1;
+  const char *is_x11 = getenv("XDG_SESSION_TYPE");
+  if(!strcmp(is_x11, "x11")) vkdt.is_x11 = 1;
   if(!glfwInit())
   {
     const char* description;

src/gui/gui.h

@@ -9,6 +9,7 @@
 
 #include <vulkan/vulkan.h>
 #include <math.h>
+#include <GLFW/glfw3.h>
 
 // max images in flight in vulkan pipeline/swap chain
 #define DT_GUI_MAX_IMAGES 8
@@ -184,6 +185,8 @@ typedef struct dt_gui_t
   // list of recently used tags
   int  tag_cnt;
   char tag[10][30];
+
+  int  is_x11; // running on xorg
 }
 dt_gui_t;
 
@@ -240,6 +243,17 @@ void dt_gui_win1_open();
 // close secondary window
 void dt_gui_win1_close();
 
+static inline void
+dt_gui_content_scale(GLFWwindow *w, float *x, float *y)
+{
+  if(vkdt.is_x11)
+  {
+    x[0] = y[0] = 1.0;
+    return;
+  }
+  glfwGetWindowContentScale(w, x, y);
+}
+
 // some gui colour things. we want perceptually uniform colour picking.
 // since hsv is a severely broken concept, we mean oklab LCh (or hCL really)
 static inline void rec2020_to_oklab(const float rgb[], float oklab[])

src/gui/main.c

@@ -158,7 +158,7 @@ static void
 mouse_position_callback(GLFWwindow* window, double x, double y)
 {
   float xscale, yscale;
-  glfwGetWindowContentScale(window, &xscale, &yscale);
+  dt_gui_content_scale(window, &xscale, &yscale);
   dt_view_mouse_position(window, x*xscale, y*yscale);
 }
 
@@ -179,7 +179,7 @@ static void
 scroll_callback(GLFWwindow *window, double xoff, double yoff)
 {
   float xscale, yscale;
-  glfwGetWindowContentScale(window, &xscale, &yscale);
+  dt_gui_content_scale(window, &xscale, &yscale);
   xoff *= xscale;
   yoff *= yscale;
   dt_view_mouse_scrolled(window, xoff, yoff);
@@ -192,7 +192,7 @@ static void
 pentablet_data_callback(double x, double y, double z, double pressure, double pitch, double yaw, double roll)
 {
   float xscale, yscale;
-  glfwGetWindowContentScale(vkdt.win.window, &xscale, &yscale);
+  dt_gui_content_scale(vkdt.win.window, &xscale, &yscale);
   x *= xscale; y *= yscale;
   dt_view_pentablet_data(x, y, z, pressure, pitch, yaw, roll);
 }

src/gui/nuklear_glfw_vulkan.h

@@ -16,6 +16,7 @@
 #ifdef NK_GLFW_VULKAN_IMPLEMENTATION
 #include "shd.h"
 #include "qvk/qvk.h"
+#include "gui/gui.h"
 #endif
 
 #include <assert.h>
@@ -982,7 +983,7 @@ NK_API void nk_glfw3_new_frame(struct nk_context *ctx, GLFWwindow *window)
 
     glfwGetCursorPos(win->win, &x, &y);
     float xscale = 1.0f, yscale = 1.0f;
-    glfwGetWindowContentScale(win->win, &xscale, &yscale);
+    dt_gui_content_scale(win->win, &xscale, &yscale);
     x *= xscale; y *= yscale;
     nk_input_motion(ctx, (int)x, (int)y);
 #ifdef NK_GLFW_GL4_MOUSE_GRABBING
@@ -1320,7 +1321,7 @@ nk_glfw3_mouse_button_callback(
     return;
   glfwGetCursorPos(w, &x, &y);
   float xscale, yscale;
-  glfwGetWindowContentScale(w, &xscale, &yscale);
+  dt_gui_content_scale(w, &xscale, &yscale);
   x *= xscale; y *= yscale;
   if (action == GLFW_PRESS) {
     double dt = glfwGetTime() - win->last_button_click;

src/gui/view.c

@@ -195,7 +195,7 @@ void dt_view_get_cursor_pos(GLFWwindow *window, double *x, double *y)
 {
   glfwGetCursorPos(window, x, y);
   float xscale, yscale;
-  glfwGetWindowContentScale(window, &xscale, &yscale);
+  dt_gui_content_scale(window, &xscale, &yscale);
   *x *= xscale;
   *y *= yscale;
 }