88d8bd84f2
The CoglOutput object represents one output such as a monitor or laptop panel, with information about attributes of the output such as the position of the output within the global coordinate space, and the refresh rate. We don't yet publically export the ability to get output information but we track it for the GLX backend, where we'll use it to track the refresh rate. Reviewed-by: Robert Bragg <robert@linux.intel.com> (cherry picked from commit d7ef9d8d71488d0e6874f1ffc6e48700d5c82a31)
243 lines
6.7 KiB
C
243 lines
6.7 KiB
C
/*
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* Cogl
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*
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* An object oriented GL/GLES Abstraction/Utility Layer
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*
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* Copyright (C) 2012 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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*
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*
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* Authors:
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* Owen Taylor <otaylor@redhat.com>
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*/
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#if !defined(__COGL_H_INSIDE__) && !defined(COGL_COMPILATION)
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#error "Only <cogl/cogl.h> can be included directly."
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#endif
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#ifndef __COGL_OUTPUT_H
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#define __COGL_OUTPUT_H
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#include <cogl/cogl-types.h>
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COGL_BEGIN_DECLS
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/**
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* SECTION:cogl-output
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* @short_description: information about an output device
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*
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* The #CoglOutput object holds information about an output device
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* such as a monitor or laptop display. It can be queried to find
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* out the position of the output with respect to the screen
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* coordinate system and other information such as the resolution
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* and refresh rate of the device.
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*
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* There can be any number of outputs which may overlap: the
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* same area of the screen may be displayed by multiple output
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* devices.
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*
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* XXX: though it's possible to query the position of the output
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* with respect to screen coordinates, there is currently no way
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* of finding out the position of a #CoglOnscreen in screen
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* coordinates, at least without using windowing-system specific
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* API's, so it's not easy to get the output positions relative
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* to the #CoglOnscreen.
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*/
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typedef struct _CoglOutput CoglOutput;
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#define COGL_OUTPUT(X) ((CoglOutput *)(X))
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/**
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* CoglSubpixelOrder
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* @COGL_SUBPIXEL_ORDER_UNKNOWN: the layout of subpixel
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* components for the device is unknown.
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* @COGL_SUBPIXEL_ORDER_NONE: the device displays colors
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* without geometrically-separated subpixel components,
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* or the positioning or colors of the components do not
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* match any of the values in the enumeration.
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* @COGL_SUBPIXEL_ORDER_HORIZONTAL_RGB: the device has
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* horizontally arranged components in the order
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* red-green-blue from left to right.
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* @COGL_SUBPIXEL_ORDER_HORIZONTAL_BGR: the device has
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* horizontally arranged components in the order
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* blue-green-red from left to right.
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* @COGL_SUBPIXEL_ORDER_VERTICAL_RGB: the device has
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* vertically arranged components in the order
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* red-green-blue from top to bottom.
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* @COGL_SUBPIXEL_ORDER_VERTICAL_BGR: the device has
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* vertically arranged components in the order
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* blue-green-red from top to bottom.
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*
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* Some output devices (such as LCD panels) display colors
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* by making each pixel consist of smaller "subpixels"
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* that each have a particular color. By using knowledge
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* of the layout of this subpixel components, it is possible
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* to create image content with higher resolution than the
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* pixel grid.
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*
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* Since: 1.14
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* Stability: unstable
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*/
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typedef enum {
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COGL_SUBPIXEL_ORDER_UNKNOWN,
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COGL_SUBPIXEL_ORDER_NONE,
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COGL_SUBPIXEL_ORDER_HORIZONTAL_RGB,
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COGL_SUBPIXEL_ORDER_HORIZONTAL_BGR,
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COGL_SUBPIXEL_ORDER_VERTICAL_RGB,
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COGL_SUBPIXEL_ORDER_VERTICAL_BGR
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} CoglSubpixelOrder;
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/**
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* cogl_is_output:
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* @object: A #CoglObject pointer
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*
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* Gets whether the given object references a #CoglOutput.
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*
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* Return value: %TRUE if the object references a #CoglOutput
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* and %FALSE otherwise.
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* Since: 1.14
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* Stability: unstable
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*/
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CoglBool
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cogl_is_output (void *object);
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/**
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* cogl_output_get_x:
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* @output: a #CoglOutput
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*
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* Gets the X position of the output with respect to the coordinate
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* system of the screen.
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*
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* Return value: the X position of the output as a pixel offset
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* from the left side of the screen coordinate space
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* Since: 1.14
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* Stability: unstable
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*/
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int
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cogl_output_get_x (CoglOutput *output);
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/**
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* cogl_output_get_y:
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* @output: a #CoglOutput
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*
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* Gets the Y position of the output with respect to the coordinate
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* system of the screen.
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*
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* Return value: the Y position of the output as a pixel offset
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* from the top side of the screen coordinate space
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* Since: 1.14
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* Stability: unstable
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*/
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int
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cogl_output_get_y (CoglOutput *output);
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/**
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* cogl_output_get_width:
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* @output: a #CoglOutput
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*
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* Gets the width of the output in pixels.
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*
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* Return value: the width of the output in pixels
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* Since: 1.14
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* Stability: unstable
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*/
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int
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cogl_output_get_width (CoglOutput *output);
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/**
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* cogl_output_get_height:
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* @output: a #CoglOutput
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*
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* Gets the height of the output in pixels.
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*
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* Return value: the height of the output in pixels
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* Since: 1.14
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* Stability: unstable
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*/
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int
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cogl_output_get_height (CoglOutput *output);
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/**
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* cogl_output_get_mm_width:
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* @output: a #CoglOutput
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*
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* Gets the physical width of the output. In some cases (such as
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* as a projector), the value returned here might correspond to
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* nominal resolution rather than the actual physical size of the
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* output device.
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*
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* Return value: the height of the output in millimeters. A value
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* of 0 indicates the width is unknown
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* Since: 1.14
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* Stability: unstable
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*/
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int
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cogl_output_get_mm_width (CoglOutput *output);
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/**
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* cogl_output_get_mm_height:
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* @output: a #CoglOutput
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*
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* Gets the physical height of the output. In some cases (such as
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* as a projector), the value returned here might correspond to
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* nominal resolution rather than the actual physical size of the
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* output device.
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*
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* Return value: the height of the output in millimeters. A value
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* of 0 indicates that the height is unknown
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* Since: 1.14
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* Stability: unstable
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*/
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int
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cogl_output_get_mm_height (CoglOutput *output);
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/**
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* cogl_output_get_subpixel_order:
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* @output: a #CoglOutput
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*
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* For an output device where each pixel is made up of smaller components
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* with different colors, returns the layout of the subpixel
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* components.
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*
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* Return value: the order of subpixel components for the output device
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* Since: 1.14
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* Stability: unstable
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*/
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CoglSubpixelOrder
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cogl_output_get_subpixel_order (CoglOutput *output);
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/**
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* cogl_output_get_refresh_rate:
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* @output: a #CoglOutput
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*
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* Gets the number of times per second that the output device refreshes
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* the display contents.
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*
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* Return value: the refresh rate of the output device. A value of zero
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* indicates that the refresh rate is unknown.
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* Since: 1.14
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* Stability: unstable
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*/
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float
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cogl_output_get_refresh_rate (CoglOutput *output);
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COGL_END_DECLS
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#endif /* __COGL_OUTPUT_H */
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