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Add output subsystem

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The output subsystem manages the connected monitors, provides framebuffers and
OpenGL contexts and handles all DRM/DRI/KMS related functionality.

Signed-off-by: David Herrmann <dh.herrmann@googlemail.com>
This commit is contained in:
David Herrmann 2011-11-20 00:09:39 +01:00
parent fca8681dfc
commit 85d7391cda
2 changed files with 1161 additions and 0 deletions
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/*
* kmscon - KMS/DRI output handling
* Written 2011 by David Herrmann <dh.herrmann@googlemail.com>
*/
/*
* KMS/DRI Output Handling
* This module provides a compositor object which manages the different outputs.
* Each output object belongs to a connected monitor.
* After creating a compositor object it will create a list of all available
* outputs. All outputs are disconnected by default. If you connect an
* output, a framebuffer with two renderbuffers is registered and you can start
* drawing to it using double-buffering.
* You can connect as many outputs as you want.
*
* To allow other applications to access the DRI you can put a compositor asleep
* and wake it up. When the compositor is asleep, the OpenGL context and
* framebuffers are still available, however, you cannot add or remove outputs
* unless the compositor is awake. You also cannot modify output modes or other
* output settings. It is recommended to avoid accessing the output objects at
* all as most of the functions simply return -EINVAL while being asleep.
*
* When waking up the compositor, it rereads all connected outputs. If a
* previously connected output has gone, it disconnects the output, removes
* the associated framebuffer and context and unbinds the output object from the
* compositor. If you own a reference to the output object, you should unref it
* now.
* You should also reread the output list for newly connected outputs.
* You can also force the compositor to reread all outputs if you noticed any
* monitor hotplugging (for instance via udev).
*
* An output may be used in different modes. Each output chooses one mode by
* default, however, you can always switch to another mode if you want another
* pixel-resolution, color-mode, etc. When switching modes, the current
* framebuffer is destroyed and a new one is created.
*/
#include <inttypes.h>
#include <stdbool.h>
#include <stdlib.h>
struct kmscon_mode;
struct kmscon_output;
struct kmscon_compositor;
/* output modes */
int kmscon_mode_new(struct kmscon_mode **out);
void kmscon_mode_ref(struct kmscon_mode *mode);
void kmscon_mode_unref(struct kmscon_mode *mode);
struct kmscon_mode *kmscon_mode_next(struct kmscon_mode *mode);
const char *kmscon_mode_get_name(const struct kmscon_mode *mode);
uint32_t kmscon_mode_get_width(const struct kmscon_mode *mode);
uint32_t kmscon_mode_get_height(const struct kmscon_mode *mode);
/* compositor outputs */
int kmscon_output_new(struct kmscon_output **out);
void kmscon_output_ref(struct kmscon_output *output);
void kmscon_output_unref(struct kmscon_output *output);
struct kmscon_output *kmscon_output_next(struct kmscon_output *output);
struct kmscon_mode *kmscon_output_get_modes(struct kmscon_output *output);
struct kmscon_mode *kmscon_output_get_current(struct kmscon_output *output);
int kmscon_output_activate(struct kmscon_output *output,
struct kmscon_mode *mode);
void kmscon_output_deactivate(struct kmscon_output *output);
bool kmscon_output_is_active(struct kmscon_output *output);
int kmscon_output_use(struct kmscon_output *output);
int kmscon_output_swap(struct kmscon_output *output);
/* compositors */
int kmscon_compositor_new(struct kmscon_compositor **out);
void kmscon_compositor_ref(struct kmscon_compositor *comp);
void kmscon_compositor_unref(struct kmscon_compositor *comp);
void kmscon_compositor_sleep(struct kmscon_compositor *comp);
int kmscon_compositor_wake_up(struct kmscon_compositor *comp);
bool kmscon_compositor_is_asleep(struct kmscon_compositor *comp);
int kmscon_compositor_use(struct kmscon_compositor *comp);
int kmscon_compositor_get_fd(struct kmscon_compositor *comp);
struct kmscon_output *kmscon_compositor_get_outputs(
struct kmscon_compositor *comp);
int kmscon_compositor_refresh(struct kmscon_compositor *comp);