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/* Copyright (C) 2007-2008 The Android Open Source Project
**
** This software is licensed under the terms of the GNU General Public
** License version 2, as published by the Free Software Foundation, and
** may be copied, distributed, and modified under those terms.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
*/
#include "framebuffer.h"
#include <memory.h>
#include <stdlib.h>
typedef struct {
/* client fields, these correspond to code that waits for updates before displaying them */
/* at the moment, only one client is supported */
void* fb_opaque;
QFrameBufferUpdateFunc fb_update;
QFrameBufferRotateFunc fb_rotate;
QFrameBufferDoneFunc fb_done;
void* pr_opaque;
QFrameBufferCheckUpdateFunc pr_check;
QFrameBufferInvalidateFunc pr_invalidate;
QFrameBufferDetachFunc pr_detach;
} QFrameBufferExtra;
static int
_get_pitch( int width, QFrameBufferFormat format )
{
switch (format) {
case QFRAME_BUFFER_RGB565:
return width*2;
default:
return -1;
}
}
int
qframebuffer_init( QFrameBuffer* qfbuff,
int width,
int height,
int rotation,
QFrameBufferFormat format )
{
int pitch;
rotation &= 3;
if (!qfbuff || width < 0 || height < 0)
return -1;
pitch = _get_pitch( width, format );
if (pitch < 0)
return -1;
memset( qfbuff, 0, sizeof(*qfbuff) );
qfbuff->extra = calloc( 1, sizeof(QFrameBufferExtra) );
if (qfbuff->extra == NULL)
return -1;
qfbuff->pixels = calloc( pitch, height );
if (qfbuff->pixels == NULL && (height > 0 && pitch > 0)) {
free( qfbuff->extra );
return -1;
}
qfbuff->width = width;
qfbuff->height = height;
qfbuff->pitch = pitch;
qfbuff->format = format;
qframebuffer_set_dpi( qfbuff, DEFAULT_FRAMEBUFFER_DPI, DEFAULT_FRAMEBUFFER_DPI );
return 0;
}
void
qframebuffer_set_dpi( QFrameBuffer* qfbuff,
int x_dpi,
int y_dpi )
{
/* dpi = dots / inch
** inch = dots / dpi
** mm / 25.4 = dots / dpi
** mm = (dots * 25.4)/dpi
*/
qfbuff->phys_width_mm = (int)(0.5 + 25.4 * qfbuff->width / x_dpi);
qfbuff->phys_height_mm = (int)(0.5 + 25.4 * qfbuff->height / y_dpi);
}
/* alternative to qframebuffer_set_dpi where one can set the physical dimensions directly */
/* in millimeters. for the record 1 inch = 25.4 mm */
void
qframebuffer_set_mm( QFrameBuffer* qfbuff,
int width_mm,
int height_mm )
{
qfbuff->phys_width_mm = width_mm;
qfbuff->phys_height_mm = height_mm;
}
void
qframebuffer_update( QFrameBuffer* qfbuff, int x, int y, int w, int h )
{
QFrameBufferExtra* extra = qfbuff->extra;
if (extra->fb_update)
extra->fb_update( extra->fb_opaque, x, y, w, h );
}
void
qframebuffer_add_client( QFrameBuffer* qfbuff,
void* fb_opaque,
QFrameBufferUpdateFunc fb_update,
QFrameBufferRotateFunc fb_rotate,
QFrameBufferDoneFunc fb_done )
{
QFrameBufferExtra* extra = qfbuff->extra;
extra->fb_opaque = fb_opaque;
extra->fb_update = fb_update;
extra->fb_rotate = fb_rotate;
extra->fb_done = fb_done;
}
void
qframebuffer_set_producer( QFrameBuffer* qfbuff,
void* opaque,
QFrameBufferCheckUpdateFunc pr_check,
QFrameBufferInvalidateFunc pr_invalidate,
QFrameBufferDetachFunc pr_detach )
{
QFrameBufferExtra* extra = qfbuff->extra;
extra->pr_opaque = opaque;
extra->pr_check = pr_check;
extra->pr_invalidate = pr_invalidate;
extra->pr_detach = pr_detach;
}
void
qframebuffer_rotate( QFrameBuffer* qfbuff, int rotation )
{
QFrameBufferExtra* extra = qfbuff->extra;
if ((rotation ^ qfbuff->rotation) & 1) {
/* swap width and height if new rotation requires it */
int temp = qfbuff->width;
qfbuff->width = qfbuff->height;
qfbuff->height = temp;
qfbuff->pitch = _get_pitch( qfbuff->width, qfbuff->format );
temp = qfbuff->phys_width_mm;
qfbuff->phys_width_mm = qfbuff->phys_height_mm;
qfbuff->phys_height_mm = temp;
}
qfbuff->rotation = rotation;
if (extra->fb_rotate)
extra->fb_rotate( extra->fb_opaque, rotation );
}
extern void
qframebuffer_done( QFrameBuffer* qfbuff )
{
QFrameBufferExtra* extra = qfbuff->extra;
if (extra) {
if (extra->pr_detach)
extra->pr_detach( extra->pr_opaque );
if (extra->fb_done)
extra->fb_done( extra->fb_opaque );
}
free( qfbuff->pixels );
free( qfbuff->extra );
memset( qfbuff, 0, sizeof(*qfbuff) );
}
#define MAX_FRAME_BUFFERS 8
static QFrameBuffer* framebuffer_fifo[ MAX_FRAME_BUFFERS ];
static int framebuffer_fifo_rpos;
static int framebuffer_fifo_count;
void
qframebuffer_fifo_add( QFrameBuffer* qfbuff )
{
if (framebuffer_fifo_count >= MAX_FRAME_BUFFERS)
return;
framebuffer_fifo[ framebuffer_fifo_count++ ] = qfbuff;
}
QFrameBuffer*
qframebuffer_fifo_get( void )
{
if (framebuffer_fifo_rpos >= framebuffer_fifo_count)
return NULL;
return framebuffer_fifo[ framebuffer_fifo_rpos++ ];
}
void
qframebuffer_check_updates( void )
{
int nn;
for (nn = 0; nn < framebuffer_fifo_count; nn++) {
QFrameBuffer* q = framebuffer_fifo[nn];
QFrameBufferExtra* extra = q->extra;
if (extra->pr_check)
extra->pr_check( extra->pr_opaque );
}
}
void
qframebuffer_invalidate_all( void )
{
int nn;
for (nn = 0; nn < framebuffer_fifo_count; nn++) {
QFrameBuffer* q = framebuffer_fifo[nn];
QFrameBufferExtra* extra = q->extra;
if (extra->pr_invalidate)
extra->pr_invalidate( extra->pr_opaque );
}
}
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