diff options
| -rw-r--r-- | include/mgl/gl.h | 1 | ||||
| -rw-r--r-- | include/mgl/window/window.h | 17 | ||||
| -rw-r--r-- | src/gl.c | 1 | ||||
| -rw-r--r-- | src/window/window.c | 11 |
4 files changed, 30 insertions, 0 deletions
diff --git a/include/mgl/gl.h b/include/mgl/gl.h index 894e57b..2546a68 100644 --- a/include/mgl/gl.h +++ b/include/mgl/gl.h @@ -20,6 +20,7 @@ typedef struct { void (*glXSwapBuffers)(Display *dpy, GLXDrawable drawable); void (*glViewport)(int x, int y, int width, int height); + void (*glScissor)(int x, int y, int width, int height); void (*glClearColor)(float red, float green, float blue, float alpha); void (*glClear)(unsigned int mask); void (*glEnable)(unsigned int cap); diff --git a/include/mgl/window/window.h b/include/mgl/window/window.h index 2d1a774..a948932 100644 --- a/include/mgl/window/window.h +++ b/include/mgl/window/window.h @@ -22,6 +22,11 @@ typedef struct { mgl_vec2i size; } mgl_view; +typedef struct { + mgl_vec2i position; + mgl_vec2i size; +} mgl_scissor; + struct mgl_window { mgl_window_handle window; void *context; @@ -29,6 +34,7 @@ struct mgl_window { /* relative to the top left of the window. only updates when the cursor is inside the window */ mgl_vec2i cursor_position; mgl_view view; + mgl_scissor scissor; bool open; bool focused; bool key_repeat_enabled; @@ -59,10 +65,21 @@ void mgl_window_display(mgl_window *self); Make sure to set the view back to the previous view after rendering items by saving the previous view with |mgl_window_get_view| and then call |mgl_window_set_view| with that saved view. + The view is set to the window size when the window is resized (window resize event). */ void mgl_window_set_view(mgl_window *self, mgl_view *new_view); void mgl_window_get_view(mgl_window *self, mgl_view *view); +/* + This should be called every frame to retain the scissor. + Make sure to set the scissor back to the previous view after rendering items + by saving the previous scissor with |mgl_window_get_scissor| and then call + |mgl_window_set_scissor| with that saved scissor. + The scissor is set to the window size when the window is resized (window resize event). +*/ +void mgl_window_set_scissor(mgl_window *self, mgl_scissor *new_scissor); +void mgl_window_get_scissor(mgl_window *self, mgl_scissor *scissor); + bool mgl_window_is_open(const mgl_window *self); bool mgl_window_has_focus(const mgl_window *self); bool mgl_window_is_key_pressed(const mgl_window *self, mgl_key key); @@ -34,6 +34,7 @@ int mgl_gl_load(mgl_gl *self) { { &self->glXSwapBuffers, "glXSwapBuffers" }, { &self->glViewport, "glViewport" }, + { &self->glScissor, "glScissor" }, { &self->glClearColor, "glClearColor" }, { &self->glClear, "glClear" }, { &self->glEnable, "glEnable" }, diff --git a/src/window/window.c b/src/window/window.c index 13bb4ba..8a6edbb 100644 --- a/src/window/window.c +++ b/src/window/window.c @@ -231,6 +231,7 @@ static void mgl_window_on_resize(mgl_window *self, int width, int height) { view.position = (mgl_vec2i){ 0, 0 }; view.size = self->size; mgl_window_set_view(self, &view); + mgl_window_set_scissor(self, &(mgl_scissor){ .position = { 0, 0 }, .size = self->size }); } static int mgl_window_init(mgl_window *self, const char *title, const mgl_window_create_params *params, Window existing_window) { @@ -721,6 +722,16 @@ void mgl_window_get_view(mgl_window *self, mgl_view *view) { *view = self->view; } +void mgl_window_set_scissor(mgl_window *self, mgl_scissor *new_scissor) { + mgl_context *context = mgl_get_context(); + self->scissor = *new_scissor; + context->gl.glScissor(self->scissor.position.x, self->scissor.position.y, self->scissor.size.x, self->scissor.size.y); +} + +void mgl_window_get_scissor(mgl_window *self, mgl_scissor *scissor) { + *scissor = self->scissor; +} + bool mgl_window_is_open(const mgl_window *self) { return self->open; } |