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Article contents:== Outdated egg! This is an egg for CHICKEN 4, the unsupported old release. You're almost certainly looking for [[/eggref/5/allegro|the CHICKEN 5 version of this egg]], if it exists. If it does not exist, there may be equivalent functionality provided by another egg; have a look at the [[https://wiki.call-cc.org/chicken-projects/egg-index-5.html|egg index]]. Otherwise, please consider porting this egg to the current version of CHICKEN. [[tags: allegro game]] == allegro This document pertains to display related methods found in the Allegro egg. Please see the main [allegro] wiki page for more information. [[toc:]] == Constants * default-display-adapter * vertex-cache-size == Enums === display-flag <procedure>(display-flag->int display-flag)</procedure> {{display-flag}} may be one of the following symbols: * windowed * fullscreen * opengl * direct3d-internal * resizable * noframe * generate-expose-events * opengl3 * opengl-forward-compatible * fullscreen-window * minimized <procedure>(int->display-flag integer)</procedure> === display-option <procedure>(display-option->int display-option)</procedure> {{display-option}} may be one of the following symbols: * red-size * green-size * blue-size * alpha-size * red-shift * green-shift * blue-shift * alpha-shift * acc-red-size * acc-green-size * acc-blue-size * acc-alpha-size * stereo * aux-buffers * color-size * depth-size * stencil-size * sample-buffers * samples * render-method * float-color * float-depth * single-buffer * swap-method * compatible-display * update-display-region * vsync * max-bitmap-size * support-npot-bitmap * can-draw-into-bitmap * support-separate-alpha <procedure>(int->display-option integer)</procedure> === display-option-importance <procedure>(display-option-importance->int display-option-importance)</procedure> {{display-option-importance}} may be one of the following symbols: * dont-care * require * suggest <procedure>(int->display-option-importance integer)</procedure> === display-orientation <procedure>(display-orientation->int display-orientation)</procedure> {{display-orientation}} may be one of the following symbols: * degrees-0 * degrees-90 * degrees-180 * degrees-270 * face-up * face-down <procedure>(int->display-oprientation integer)</procedure> === gl-variant <procedure>(gl-variant->int gl-variant)</procedure> {{gl-variant}} may be one of the following symbols: * opengl * opengl-es <procedure>(int->gl-variant integer)</procedure> == Records === display <record>display</record> === display-mode <record>display-mode</record> <procedure>(make-display-mode*)</procedure> <procedure>(make-display-mode)</procedure> <procedure>(free-display-mode! display-mode)</procedure> <procedure>(display-mode-width display-mode)</procedure> <setter>(display-mode-width-set! display-mode integer)</setter> <procedure>(display-mode-height display-mode)</procedure> <setter>(display-mode-height-set! display-mode integer)</setter> <procedure>(display-mode-format display-mode)</procedure> <setter>(display-mode-format-set! display-mode pixel-format)</setter> <procedure>(display-mode-refresh-rate display-mode)</procedure> <setter>(display-mode-refresh-rate-set! display-mode integer)</setter> === monitor <record>monitor</record> <procedure>(make-monitor*)</procedure> <procedure>(make-monitor)</procedure> <procedure>(free-monitor! monitor)</procedure> <procedure>(monitor-x1 monitor)</procedure> <procedure>(monitor-y1 monitor)</procedure> <procedure>(monitor-x2 monitor)</procedure> <procedure>(monitor-y2 monitor)</procedure> == Functions === Display <procedure>(new-display-refresh-rate)</procedure> Implements al_get_new_display_refresh_rate. <procedure>(new-display-refresh-rate-set! integer)</procedure> Implements al_set_new_display_refresh_rate. <procedure>(new-display-flags)</procedure> Implements al_get_new_display_flags. <procedure>(new-display-flags-set! integer)</procedure> Implements al_set_new_display_flags. <procedure>(new-display-adapter)</procedure> Implements al_get_new_display_adapter. <procedure>(new-display-adapter-set! integer)</procedure> Implements al_set_new_display_adpater. <procedure>(new-display-window-position)</procedure> Returns a 2-element list consisting of the new display coordinates. <procedure>(new-display-window-position-set! (integer x) (integer y))</procedure> Sets the a new display's window position. <procedure>(new-display-option-value display-option)</procedure> Retrieves the value for a particular display-option for newly created displays. <procedure>(new-display-option-importance display-option)</procedure> Retrieves the importance for a particular display-option for newly created dispalys. <procedure>(new-display-option-set! display-option (integer value) display-option-importance)</procedure> Implements al_set_new_display_option. <procedure>(new-display-reset-options)</procedure> Implements al_reset_new_display_options. <procedure>(make-display* (integer width) (integer height))</procedure> Implements al_create_display. <procedure>(make-display (integer width) (integer height))</procedure> Implements al_create_display, with (free-display!) declared as a finalizer. <procedure>(make-display/mode* display-mode (integer adapter) (integer flags))</procedure> Creates a new display, taking the refresh rate, width and height from a display-mode struct. <procedure>(make-display/mode display-mode (integer adapter) (integer flags))</procedure> Creates a new display, taking the refresh rate, width and height from a display-mode struct, with (free-display-mode!) declared as a finalizer. <procedure>(free-display! display)</procedure> Implements al_destroy_display. <procedure>(current-display)</procedure> Implements al_get_current_display. <procedure>(display-mode-count)</procedure> Implements al_get_num_display_modes. <procedure>(display-mode-init! display-mode (integer index))</procedure> Implements al_get_display_mode, returning #f if unsuccessful. <procedure>(update-display-region! (integer x) (integer y) (integer width) (integer height))</procedure> Implements al_update_display_region. <procedure>(compatible-bitmap? bitmap)</procedure> Implements al_is_compatible_bitmap. <procedure>(wait-for-vsync)</procedure> Implements al_wait_for_vsync. <procedure>(draw-pixel (float x) (floay y) color)</procedure> Implements al_draw_pixel. <procedure>(video-adapter-count)</procedure> Implements al_get_num_video_adapters. <procedure>(monitor-init! monitor (integer adapter))</procedure> Implements al_get_monitor_info. <procedure>(display-option display display-option)</procedure> Implements al_get_display_option. <setter>(display-hold-bitmap-drawing! bool)</setter> Implements al_hold_bitmap_drawing. <procedure>(display-bitmap-drawing-held?)</procedure> Implements al_is_bitmap_drawing_help. <procedure>(display-window-title-set! display string)</procedure> Implements al_set_window_title. <procedure>(display-width display)</procedure> Implements al_get_display_width. <procedure>(display-height display)</procedure> Implements al_get_display_height. <procedure>(display-format display)</procedure> Implements al_get_display_format. <procedure>(display-refresh-rate display)</procedure> Implements al_get_display_refresh_rate. <procedure>(display-flags display)</procedure> Implements al_get_display_flags. <procedure>(display-toggle-flag! display display-flag bool)</procedure> Implements al_toggle_display_flag. <procedure>(display-backbuffer display)</procedure> Implements al_get_backbuffer. <procedure>(display-acknowledge-resize display)</procedure> Implements al_acknowledge_resize. <procedure>(display-resize! display (integer width) (integer height))</procedure> Implements al_resize_display. <procedure>(display-event-source display)</procedure> Implements al_get_display_event_source. <procedure>(display-iconset! display bitmap)</procedure> Implements al_set_display_icon. <procedure>(clear-to-color color)</procedure> Implements al_clear_to_color. <procedure>(target-bitmap)</procedure> Implements al_get_target_bitmap. <procedure>(target-bitmap-set! bitmap)</procedure> Implements al_set_target_bitmap. <procedure>(target-backbuffer-set! display)</procedure> Implements al_set_target_backbuffer. <procedure>(flip-display)</procedure> Implements al_flip_display. === Direct3D <procedure>(d3d-non-pow2-texture-support?)</procedure> Implements al_have_d3d_non_pow2_texture_support. <procedure>(d3d-non-square-texture-support?)</procedure> Implements al_have_d3d_non_square_texture_support. ==== Bitmap Specific <procedure>(bitmap-d3d-system-texture bitmap)</procedure> Implements al_get_d3d_system_texture. <procedure>(bitmap-d3d-video-texture bitmap)</procedure> Implements al_get_d3d_video_texture. <procedure>(bitmap-d3d-texture-position bitmap)</procedure> Returns a 2-element list consisting of a u, v pair. ==== Display Specific <procedure>(display-d3d-device-lost? display)</procedure> Implements al_is_d3d_device_lost. <procedure>(display-d3d-device display)</procedure> Implements al_get_d3d_device. === OpenGL <procedure>(opengl-addon-version)</procedure> Implements al_get_opengl_version. <procedure>(opengl-extension-exists? string)</procedure> Implements al_have_opengl_extension. <procedure>(opengl-proc-address string)</procedure> Implements al_get_opengl_proc_address. <procedure>(opengl-texture bitmap)</procedure> Implements al_get_opengl_texture. <procedure>(opengl-remove-fbo! bitmap)</procedure> Implements al_remove_opengl_fbo. <procedure>(opengl-fbo bitmap)</procedure> Implements al_get_opengl_fbo. <procedure>(opengl-texture-size bitmap)</procedure> Returns a 2-element list of the width and height of the opengl texture for the given bitmap. <procedure>(opengl-texture-position bitmap)</procedure> Returns a 2-element list of the u,v position of the opengl texture for the given bitmap. <procedure>(opengl-context-set! display)</procedure> Implements al_set_current_opengl_context. <procedure>(opengl-variant)</procedure> Implements al_get_opengl_variant. === Windows <procedure>(windows-window-handle)</procedure> Implements al_get_win_window_handle. 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