window scrolling

1 files changed, 18 insertions, 0 deletions

diff --git a/platform/desktop/desktop.c b/platform/desktop/desktop.c
index 9574c9c..b156e56 100644
--- a/platform/desktop/desktop.c
+++ b/platform/desktop/desktop.c
@@ -45,6 +45,7 @@ typedef struct {
     GLint uniform_tex_loc;
     GLuint screen_handle;
     uint32_t typed;
+    double scroll;
 } Desktop_Platform;
 
 Desktop_Platform p;
@@ -57,6 +58,15 @@ void character_callback(GLFWwindow *window, unsigned int cp)
 }
 
 static
+void scroll_callback(GLFWwindow* window, double x, double y)
+{
+    (void)window;
+    (void)x;
+    p.scroll = y;
+}
+
+
+static
 GLuint compile_shader(GLenum type, const char *src)
 {
     GLuint shader = glCreateShader(type);
@@ -102,6 +112,7 @@ void ty_platform_init(ty_Ctx *ctx)
         ty_log_fatal(TY_PLATFORM_ERR, "could not load GLAD");
 
     glfwSetCharCallback(p.win, character_callback);
+    glfwSetScrollCallback(p.win, scroll_callback);
 
     ty_Vec2 vertices[] = {
         ty_vec2(-1, -1), ty_vec2(0, 1),
@@ -180,6 +191,8 @@ void ty_platform_deinit(void)
 
 void ty_platform_frame(ty_Image img)
 {
+    p.scroll = 0;
+
     glfwPollEvents();
 
     int win_width, win_height;
@@ -283,3 +296,8 @@ bool ty_platform_get_typed_char(uint32_t *c)
     p.typed = 0;
     return true;
 }
+
+int ty_platform_get_scroll(void)
+{
+    return (int)p.scroll;
+}