| /* 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; |
| QFrameBufferPollFunc fb_poll; |
| 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, |
| QFrameBufferPollFunc fb_poll, |
| QFrameBufferDoneFunc fb_done ) |
| { |
| QFrameBufferExtra* extra = qfbuff->extra; |
| |
| extra->fb_opaque = fb_opaque; |
| extra->fb_update = fb_update; |
| extra->fb_rotate = fb_rotate; |
| extra->fb_poll = fb_poll; |
| 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 ); |
| } |
| |
| void |
| qframebuffer_poll( QFrameBuffer* qfbuff ) |
| { |
| QFrameBufferExtra* extra = qfbuff->extra; |
| |
| if (extra->fb_poll) |
| extra->fb_poll( extra->fb_opaque ); |
| } |
| |
| |
| 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 ); |
| } |
| } |