From e60fa7740cd7d245d1b22a25fea9df0768d32668 Mon Sep 17 00:00:00 2001
From: Benji Dial <benji@benjidial.net>
Date: Sun, 19 May 2024 04:34:40 -0400
Subject: mouse support (working in qemu, semi-working in virtualbox)

---
 applications/init/source/main.cpp | 124 +++++++++++++++++++++++++++++++++-----
 1 file changed, 108 insertions(+), 16 deletions(-)

(limited to 'applications')

diff --git a/applications/init/source/main.cpp b/applications/init/source/main.cpp
index ed0ef8e..6aa85a4 100644
--- a/applications/init/source/main.cpp
+++ b/applications/init/source/main.cpp
@@ -1,28 +1,120 @@
 #include <daguerre.hpp>
 
+void overlay_encode(
+  daguerre::hilbert_color &dest, const daguerre::rgb24 &src) {
+  if (src.r != 0xff || src.g != 0x00 || src.b != 0xff)
+    daguerre::encode(dest, src);
+}
+
+void invert(daguerre::rgb24 &dest, const daguerre::rgb24 &src) {
+  dest.r = 255 - src.r;
+  dest.g = 255 - src.g;
+  dest.b = 255 - src.b;
+}
+
 int main(int, char **) {
 
-  auto hfb = daguerre::get_hilbert_framebuffer();
-  daguerre::image<daguerre::rgb24> bim;
+  auto framebuffer = daguerre::get_hilbert_framebuffer();
 
-  std::FILE *burdon = std::fopen("/assets/burden.ppm", "r");
-  daguerre::try_load_ppm(burdon, bim);
-  std::fclose(burdon);
+  daguerre::image<daguerre::rgb24> burden;
+  std::FILE *burden_file = std::fopen("/assets/burden.ppm", "r");
+  daguerre::try_load_ppm(burden_file, burden);
+  std::fclose(burden_file);
 
-  unsigned width = bim.width < hfb.width ? bim.width : hfb.width;
-  unsigned height = bim.height < hfb.height ? bim.height : hfb.height;
-  unsigned x = (hfb.width - width) / 2;
-  unsigned y = (hfb.height - height) / 2;
+  daguerre::image<daguerre::rgb24> pointer;
+  std::FILE *pointer_file = std::fopen("/assets/pointer.ppm", "r");
+  daguerre::try_load_ppm(pointer_file, pointer);
+  std::fclose(pointer_file);
+
+  int32_t width = burden.width < framebuffer.width
+                ? burden.width : framebuffer.width;
+  int32_t height = burden.height < framebuffer.height
+                 ? burden.height : framebuffer.height;
+  unsigned x = (framebuffer.width - width) / 2;
+  unsigned y = (framebuffer.height - height) / 2;
+
+  int32_t new_mouse_x = width / 2;
+  int32_t new_mouse_y = height / 2;
+  int32_t old_mouse_x = new_mouse_x;
+  int32_t old_mouse_y = new_mouse_y;
+  bool was_left_mouse_down = false;
+
+  daguerre::overlay_region<
+    daguerre::hilbert_color, daguerre::rgb24, daguerre::encode>(
+    framebuffer, x, y, burden, 0, 0, width, height);
 
   while (1) {
-    daguerre::copy_region<>(hfb, bim, 0, 0, x, y, width, height);
-    while ((__euler_read_key_packet() & 0x0400ff) != 0x00005a)
-      ;
-    for (unsigned i = 0; i < bim.width * bim.height; ++i) {
-      bim.buffer[i].r = 255 - bim.buffer[i].r;
-      bim.buffer[i].g = 255 - bim.buffer[i].g;
-      bim.buffer[i].b = 255 - bim.buffer[i].b;
+
+    __euler_mouse_buttons mouse_buttons;
+    int16_t mouse_change_x, mouse_change_y;
+    uint32_t key_packet;
+    __euler_input_packet_type packet_type = __euler_get_input_packet(
+      mouse_buttons, mouse_change_x, mouse_change_y, key_packet);
+
+    bool anything_changed = false;
+    bool should_invert = false;
+
+    if (packet_type == __EULER_IPT_MOUSE) {
+
+      if (mouse_change_x != 0 || mouse_change_y != 0) {
+
+        old_mouse_x = new_mouse_x;
+        old_mouse_y = new_mouse_y;
+        new_mouse_x += mouse_change_x;
+        new_mouse_y += mouse_change_y;
+
+        if (new_mouse_x < 0)
+          new_mouse_x = 0;
+        else if ((unsigned)new_mouse_x > width - pointer.width)
+          new_mouse_x = width - pointer.width;
+
+        if (new_mouse_y < 0)
+          new_mouse_y = 0;
+        else if ((unsigned)new_mouse_y > height - pointer.height)
+          new_mouse_y = height - pointer.height;
+
+        anything_changed = true;
+
+      }
+
+      if (!was_left_mouse_down && (mouse_buttons & __EULER_MB_LEFT))
+        should_invert = true;
+
+      was_left_mouse_down = mouse_buttons & __EULER_MB_LEFT;
+
+    }
+
+    else if (packet_type == __EULER_IPT_KEYBOARD)
+      if ((key_packet & 0x0400ff) == 0x00005a)
+        should_invert = true;
+
+    if (should_invert) {
+
+      //this works with the current implementation of overlay_region, but
+      //maybe it would be better to have a dedicated function for when the
+      //two regions are exactly the same, given the comment on overlay_region.
+      daguerre::overlay_region<daguerre::rgb24, daguerre::rgb24, invert>(
+        burden, 0, 0, burden, 0, 0, width, height);
+
+      daguerre::overlay_region<
+        daguerre::hilbert_color, daguerre::rgb24, daguerre::encode>(
+        framebuffer, x, y, burden, 0, 0, width, height);
+
+      anything_changed = true;
+
     }
+
+    if (anything_changed) {
+      daguerre::overlay_region<
+        daguerre::hilbert_color, daguerre::rgb24, daguerre::encode>(
+        framebuffer, old_mouse_x + x, old_mouse_y + y, burden,
+        old_mouse_x, old_mouse_y, pointer.width, pointer.height);
+      daguerre::overlay_region<
+        daguerre::hilbert_color, daguerre::rgb24, overlay_encode>(
+        framebuffer, new_mouse_x + x, new_mouse_y + y,
+        pointer, 0, 0, pointer.width, pointer.height);
+    }
+
   }
 
 }
-- 
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