810 lines
17 KiB
NASM
810 lines
17 KiB
NASM
; window management routines
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; window struct:
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; data.32 framebuffer_ptr - pointer to this window's framebuffer
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; data.32 event_queue_ptr - current event queue pointer
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; data.32 event_queue_bottom - pointer to beginning of this window's event queue
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; data.32 title_ptr - pointer to null-terminated title string
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; data.16 width - width of this window
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; data.16 height - height of this window, not including the title bar
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; data.16 x_pos - X coordinate of this window (top left corner of title bar)
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; data.16 y_pos - Y coordinate of this window (top left corner of title bar)
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; data.8 overlay - overlay number of this window
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; data.8 reserved_1
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; data.16 flags - flags for this window
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; data.32 menu_bar_ptr - pointer to this window's menu bar root struct, or 0 for none
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; data.32 first_widget_ptr - pointer to this window's first widget
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const WINDOW_STRUCT_SIZE: 36 ; 9 words = 36 bytes
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const TITLE_BAR_HEIGHT: 16
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const TITLE_BAR_TEXT_FOREGROUND: 0xFF000000
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const TITLE_BAR_TEXT_BACKGROUND: 0xFFFFFFFF
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const WINDOW_FLAG_ALWAYS_BACKGROUND: 1
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; create a new window and allocate memory as required
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; inputs:
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; r0: pointer to empty 36 byte window struct
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; r1: pointer to null-terminated title string
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; r2: window width
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; r3: window height, not including the title bar
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; r4: initial X coordinate (top left corner of title bar)
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; r5: initial Y coordinate (top left corner of title bar)
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; r6: pointer to menu bar root struct, or 0x00000000 for no menu bar
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; r7: pointer to first widget, or 0x00000000 for no widgets
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; outputs:
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; none
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new_window:
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push r0
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push r1
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push r2
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push r3
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push r4
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push r5
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push r10
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push r11
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push r12
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; first, set up the initial struct values
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; title string
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mov r10, r0
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add r10, 12
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mov [r10], r1
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; window size
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add r10, 4
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mov.16 [r10], r2
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add r10, 2
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mov.16 [r10], r3
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; window position
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add r10, 2
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mov.16 [r10], r4
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add r10, 2
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mov.16 [r10], r5
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; menu bar root struct pointer
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add r10, 6
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mov [r10], r6
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; first widget pointer
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add r10, 4
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mov [r10], r7
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; then, allocate memory for the framebuffer
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; the space required is width * (height + TITLE_BAR_HEIGHT) * 4
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mov r10, r2
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mov r11, r3
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add r11, TITLE_BAR_HEIGHT
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mul r10, r11
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mul r10, 4
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push r0
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mov r0, r10
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call allocate_memory
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cmp r0, 0
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ifz jmp memory_error
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mov r10, r0
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pop r0
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mov [r0], r10
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mov r12, r10
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; then, allocate memory for the event queue
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; 32 events * 8 entries per event * 4 bytes per word = 1024 bytes
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push r0
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mov r0, 1024
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call allocate_memory
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cmp r0, 0
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ifz jmp memory_error
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mov r11, r0
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pop r0
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mov r10, r0
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add r10, 8
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mov [r10], r11
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sub r10, 4
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mov [r10], r11
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; then, find an overlay to use for this window
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push r0
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call get_unused_overlay
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mov r11, r0
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pop r0
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mov r10, r0
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add r10, 24
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mov.8 [r10], r11
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; then, set the properties of the overlay
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push r0
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push r1
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push r2
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mov r0, r4
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mov r1, r5
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mov r2, r11
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call move_overlay
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pop r2
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pop r1
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mov r0, r2
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mov r1, r3
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add r1, TITLE_BAR_HEIGHT
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mov r2, r11
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call resize_overlay
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mov r0, r12
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mov r1, r11
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call set_overlay_framebuffer_pointer
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mov r0, r11
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call enable_overlay
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mov r0, 0xFF000000
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mov r1, r11
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call fill_overlay
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pop r0
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; then, draw the title bar
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call draw_title_bar_to_window
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; then, draw the menu bar
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push r0
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call enable_menu_bar
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mov r0, r6
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call clear_menu_bar
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mov r1, 0xFFFFFFFF
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cmp r0, 0
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ifnz call draw_menu_bar_root_items
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pop r0
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; if the current active window is on a higher overlay, swap
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push r0
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call get_window_overlay_number ; get the overlay number of the new window
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mov r10, r0
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mov.8 r0, [active_window_offset] ; get the active window's overlay number
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mul r0, 4
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add r0, window_list
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mov r1, [r0]
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mov r0, r1
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call get_window_overlay_number
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mov r11, r0
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pop r0
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cmp r11, r10 ; if the active window is on a higher overlay, swap
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ifnc call swap_windows
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; finally, add this window to the window list
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push r0
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mov r0, 0x00000000
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call search_for_window_list_entry
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mov.8 [active_window_offset], r0
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mul r0, 4
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add r0, window_list
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pop r1
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mov [r0], r1
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pop r12
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pop r11
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pop r10
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pop r5
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pop r4
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pop r3
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pop r2
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pop r1
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pop r0
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ret
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; destroy a window and free memory used by it
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; note that this does not free the memory used by the window struct itself
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; inputs:
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; r0: pointer to window struct
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; outputs:
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; none
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destroy_window:
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push r0
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push r1
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push r2
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mov r2, r0
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; remove the window from the window list
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call search_for_window_list_entry
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mul r0, 4
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add r0, window_list
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mov [r0], 0
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; set the active window to whatever entry is found first
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call search_for_nonempty_window_list_entry
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mov.8 [active_window_offset], r0
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cmp r0, 0xFFFFFFFF
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ifz jmp destroy_window_no_more_windows
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; swap newly active window with the window about to be destroyed
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call window_list_offset_to_struct
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mov r1, r2
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call swap_windows
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; set the menu bar for the newly active window
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mov r0, r2
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call get_window_menu_bar_root_struct
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call enable_menu_bar
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call clear_menu_bar
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mov r1, 0xFFFFFFFF
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cmp r0, 0
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ifnz call draw_menu_bar_root_items
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destroy_window_no_more_windows:
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; free framebuffer memory
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mov r0, [r2]
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call free_memory
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; free event queue memory
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add r2, 8
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mov r0, [r2]
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call free_memory
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; disable the window's overlay
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add r2, 16
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movz.8 r0, [r2]
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call disable_overlay
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pop r2
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pop r1
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pop r0
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ret
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; call this if the user clicks on a window's title bar
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; inputs:
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; r0: 16-bit flags value
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; r1: pointer to window struct
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; outputs:
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; none
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set_window_flags:
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push r1
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add r1, 25
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mov.16 [r1], r0
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pop r1
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ret
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; call this if the user clicks on a window's title bar
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; inputs:
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; r0: pointer to window struct
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; outputs:
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; none
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start_dragging_window:
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push r0
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push r1
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push r2
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push r4
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push r5
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mov r2, r0
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mov r4, r0
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mov r5, r0
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add r4, 20
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add r5, 22
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movz.16 r4, [r4]
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movz.16 r5, [r5]
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call get_mouse_position
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sub r0, r4
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sub r1, r5
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mov r4, r0
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mov r5, r1
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start_dragging_window_loop:
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call get_mouse_position
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sub r0, r4
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sub r1, r5
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call move_window
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call get_mouse_button
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bts r0, 2
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ifnz jmp start_dragging_window_loop
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pop r5
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pop r4
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pop r2
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pop r1
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pop r0
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ret
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; move a window
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; r0: X position
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; r1: Y position
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; r2: pointer to window struct
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move_window:
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push r0
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push r1
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push r2
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push r3
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push r4
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push r5
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push r6
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; prevent windows from being moved off-screen
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add r2, 16
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movz.16 r3, [r2]
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add r2, 2
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movz.16 r4, [r2]
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mov r5, 640
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mov r6, 480
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sub r5, r3
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sub r6, r4
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cmp r0, 0x80000000
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ifgt mov r0, 0
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cmp r1, 0x80000000
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ifgt mov r1, 0
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cmp r0, r5
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ifgt mov r0, r5
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cmp r1, r6
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ifgt mov r1, r6
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; move the window
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add r2, 2
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mov.16 [r2], r0
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add r2, 2
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mov.16 [r2], r1
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add r2, 2
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movz.8 r2, [r2]
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call move_overlay
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pop r6
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pop r5
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pop r4
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pop r3
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pop r2
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pop r1
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pop r0
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ret
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; swap two windows
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; inputs:
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; r0: pointer to window struct
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; r1: pointer to window struct
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; outputs:
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; none
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swap_windows:
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push r0
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push r1
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push r2
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push r3
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mov r2, r0
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mov r3, r1
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add r2, 24
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movz.8 r0, [r2]
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add r3, 24
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movz.8 r1, [r3]
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call swap_overlays
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movz.8 [r2], r1
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movz.8 [r3], r0
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pop r3
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pop r2
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pop r1
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pop r0
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ret
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; fill a whole window with a color
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; inputs:
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; r0: color
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; r1: pointer to window struct
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; outputs:
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; none
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fill_window:
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push r1
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push r2
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mov r2, r1
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add r1, 24
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movz.8 r1, [r1]
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call fill_overlay
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mov r0, r2
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call draw_title_bar_to_window
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pop r2
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pop r1
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ret
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; get the overlay used by a window
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; DO NOT CACHE THIS VALUE, it can change any time the window order changes
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; inputs:
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; r0: pointer to window struct
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; outputs:
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; r0: overlay number
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get_window_overlay_number:
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add r0, 24
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movz.8 r0, [r0]
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ret
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; get the menu bar root struct used by a window
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; inputs:
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; r0: pointer to window struct
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; outputs:
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; r0: pointer to menu bar root struct, or 0x00000000 for no menu bar
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get_window_menu_bar_root_struct:
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add r0, 28
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mov r0, [r0]
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ret
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; draw a window's title bar
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; inputs:
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; r0: pointer to window struct
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; outputs:
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; none
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draw_title_bar_to_window:
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push r0
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push r3
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push r4
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push r10
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push r11
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push r12
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push r31
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; get the title string
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add r0, 12
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mov r12, [r0]
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; get the width of this window
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add r0, 4
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movz.16 r11, [r0]
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; get overlay number of this window
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add r0, 8
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movz.8 r10, [r0]
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; save the old tilemap
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call get_tilemap
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push r0
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push r1
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push r2
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; set the tilemap to our 1x16 tile patterns
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mov r0, window_title_bar_patterns
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mov r1, 1
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mov r2, 16
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call set_tilemap
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mov r1, 0
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mov r2, 0
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mov r3, r10
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mov r31, r11
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draw_title_bar_to_window_loop:
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mov r4, r31
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rem r4, 2
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cmp r4, 0
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ifz mov r0, 0
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ifnz mov r0, 1
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call draw_tile_to_overlay
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inc r1
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loop draw_title_bar_to_window_loop
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; restore the old tilemap
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pop r2
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pop r1
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pop r0
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call set_tilemap
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; draw the title text
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mov r0, r12
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mov r1, 8
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mov r2, 0
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mov r3, TITLE_BAR_TEXT_FOREGROUND
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mov r4, TITLE_BAR_TEXT_BACKGROUND
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mov r5, r10
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call draw_str_to_overlay
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; draw the close button
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mov r0, 1
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mov r1, 4
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mov r2, 6
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mov r3, 8
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mov r4, 0xFFFFFFFF
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mov r5, r10
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call draw_filled_rectangle_to_overlay
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mov r0, 2
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mov r1, 5
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mov r2, 4
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mov r3, 6
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mov r4, 0xFF000000
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mov r5, r10
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call draw_filled_rectangle_to_overlay
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pop r31
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pop r12
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pop r11
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pop r10
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pop r4
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pop r3
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pop r0
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ret
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; add an event to the active window
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; inputs:
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; r0-r7: event
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; outputs:
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; none
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add_event_to_active_window:
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push r0
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movz.8 r0, [active_window_offset]
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call window_list_offset_to_struct
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mov r8, r0
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pop r0
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call new_window_event
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ret
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; add a mouse event to the active window if the mouse was clicked inside the active window
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; if so, automatically convert the X and Y coords to be relative to the window
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; inputs:
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; r0-r7: event
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; outputs:
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; none
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add_mouse_event_to_active_window:
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push r0
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push r2
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push r10
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push r11
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push r12
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; save X and Y coords of the click and the event type
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mov r10, r1
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mov r11, r2
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mov r12, r0
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; get the window's overlay number
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movz.8 r0, [active_window_offset]
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call window_list_offset_to_struct
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call get_window_overlay_number
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; check if the window's overlay covers the clicked position
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mov r2, r0
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mov r0, r10
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mov r1, r11
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call check_if_overlay_covers_position
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; if it doesn't, then end here
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ifnz jmp add_mouse_event_to_active_window_end
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; if it does, then make the X and Y coords relative to the overlay
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call make_coordinates_relative_to_overlay
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; add the event
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mov r2, r1
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mov r1, r0
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mov r0, r12
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call add_event_to_active_window
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add_mouse_event_to_active_window_end:
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pop r12
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pop r11
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pop r10
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pop r2
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pop r0
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ret
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; add a mouse event to an inactive window if the mouse was clicked inside the window
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; if so, automatically convert the X and Y coords to be relative to the window
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; inputs:
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; r0-r7: event
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; r8: pointer to window struct
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; outputs:
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; none
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add_mouse_event_to_inactive_window:
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push r0
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push r2
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push r10
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push r11
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push r12
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; save X and Y coords of the click and the event type
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mov r10, r1
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mov r11, r2
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mov r12, r0
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; get the window's overlay number
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mov r0, r8
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call get_window_overlay_number
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; check if the window's overlay covers the clicked position
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mov r2, r0
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mov r0, r10
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mov r1, r11
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call check_if_overlay_covers_position
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; if it doesn't, then end here
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ifnz jmp add_mouse_event_to_inactive_window_end
|
|
; if it does, then make the X and Y coords relative to the overlay
|
|
call make_coordinates_relative_to_overlay
|
|
|
|
; add the event
|
|
mov r2, r1
|
|
mov r1, r0
|
|
mov r0, r12
|
|
call new_window_event
|
|
add_mouse_event_to_inactive_window_end:
|
|
pop r12
|
|
pop r11
|
|
pop r10
|
|
pop r2
|
|
pop r0
|
|
ret
|
|
|
|
; search for an entry in the window list
|
|
; inputs:
|
|
; r0: entry (pointer to window struct)
|
|
; outputs:
|
|
; r0: window list offset, or 0xFFFFFFFF if not found
|
|
search_for_window_list_entry:
|
|
push r1
|
|
push r2
|
|
push r31
|
|
|
|
mov r1, window_list
|
|
mov r2, 0
|
|
mov r31, 31
|
|
search_for_window_list_entry_loop:
|
|
cmp [r1], r0
|
|
ifz jmp search_for_window_list_entry_found
|
|
inc r2
|
|
add r1, 4
|
|
loop search_for_window_list_entry_loop
|
|
; not found, return 0xFFFFFFFF
|
|
mov r0, 0xFFFFFFFF
|
|
|
|
pop r31
|
|
pop r2
|
|
pop r1
|
|
ret
|
|
search_for_window_list_entry_found:
|
|
; found the entry, return its offset
|
|
mov r0, r2
|
|
|
|
pop r31
|
|
pop r2
|
|
pop r1
|
|
ret
|
|
|
|
; search for the first non-empty entry in the window list
|
|
; this skips over items that have the "always background" flag set
|
|
; inputs:
|
|
; none
|
|
; outputs:
|
|
; r0: window list offset, or 0xFFFFFFFF if not found
|
|
search_for_nonempty_window_list_entry:
|
|
push r1
|
|
push r2
|
|
push r3
|
|
push r31
|
|
|
|
mov r1, window_list
|
|
mov r2, 0
|
|
mov r31, 31
|
|
search_for_nonempty_window_list_entry_loop:
|
|
cmp [r1], 0
|
|
ifz jmp search_for_nonempty_window_list_entry_loop_skip
|
|
mov r3, [r1]
|
|
add r3, 25
|
|
movz.16 r3, [r3]
|
|
and r3, WINDOW_FLAG_ALWAYS_BACKGROUND
|
|
cmp r3, 0
|
|
ifz jmp search_for_nonempty_window_list_entry_found
|
|
search_for_nonempty_window_list_entry_loop_skip:
|
|
inc r2
|
|
add r1, 4
|
|
loop search_for_nonempty_window_list_entry_loop
|
|
; not found, return 0xFFFFFFFF
|
|
mov r0, 0xFFFFFFFF
|
|
|
|
pop r31
|
|
pop r3
|
|
pop r2
|
|
pop r1
|
|
ret
|
|
search_for_nonempty_window_list_entry_found:
|
|
; found the entry, return its offset
|
|
mov r0, r2
|
|
|
|
pop r31
|
|
pop r3
|
|
pop r2
|
|
pop r1
|
|
ret
|
|
|
|
; given an overlay number, get the window struct of the window associated with that overlay
|
|
; inputs:
|
|
; r0: overlay number
|
|
; outputs:
|
|
; r0: pointer to window struct, or 0x00000000 if not found
|
|
get_window_with_overlay:
|
|
push r1
|
|
push r2
|
|
push r3
|
|
push r31
|
|
|
|
mov r1, window_list
|
|
mov r31, 31
|
|
get_window_with_overlay_loop:
|
|
mov r2, [r1]
|
|
add r2, 24
|
|
cmp.8 [r2], r0
|
|
ifz jmp get_window_with_overlay_found
|
|
add r1, 4
|
|
loop get_window_with_overlay_loop
|
|
; not found, return 0
|
|
mov r0, 0
|
|
|
|
pop r31
|
|
pop r3
|
|
pop r2
|
|
pop r1
|
|
ret
|
|
get_window_with_overlay_found:
|
|
; found the entry, return the pointer to its struct
|
|
mov r0, [r1]
|
|
|
|
pop r31
|
|
pop r3
|
|
pop r2
|
|
pop r1
|
|
ret
|
|
|
|
; get a window struct pointer from the window list
|
|
; inputs:
|
|
; r0: window list offset
|
|
; outputs:
|
|
; r0: pointer to window struct
|
|
window_list_offset_to_struct:
|
|
mul r0, 4
|
|
add r0, window_list
|
|
mov r0, [r0]
|
|
ret
|
|
|
|
; get a pointer to the active window struct
|
|
; inputs:
|
|
; none
|
|
; outputs:
|
|
; r0: pointer to current window struct, or zero if none
|
|
get_active_window_struct:
|
|
movz.8 r0, [active_window_offset]
|
|
cmp.8 r0, 0xFF
|
|
ifz mov r0, 0
|
|
ifz ret
|
|
call window_list_offset_to_struct
|
|
ret
|
|
|
|
window_title_bar_patterns:
|
|
; 1x16 tile
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
|
|
; 1x16 tile
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
data.32 TITLE_BAR_TEXT_BACKGROUND
|
|
data.32 0x00000000
|
|
|
|
active_window_offset: data.8 0xFF
|
|
window_list: data.fill 0, 124 ; 31 window structs * 4 bytes each
|
|
|
|
#include "window/event.asm"
|
|
#include "window/event_manager_task.asm"
|
|
#include "window/messagebox.asm"
|
|
#include "window/overlay.asm"
|