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|
//==========================================================================
//
// framebuf.c
//
// Generic API for accessing framebuffers
//
//==========================================================================
// ####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
// This file is part of eCos, the Embedded Configurable Operating System.
// Copyright (C) 2008 Free Software Foundation, Inc.
//
// eCos is free software; you can redistribute it and/or modify it under
// the terms of the GNU General Public License as published by the Free
// Software Foundation; either version 2 or (at your option) any later
// version.
//
// eCos 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.
//
// You should have received a copy of the GNU General Public License
// along with eCos; if not, write to the Free Software Foundation, Inc.,
// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
//
// As a special exception, if other files instantiate templates or use
// macros or inline functions from this file, or you compile this file
// and link it with other works to produce a work based on this file,
// this file does not by itself cause the resulting work to be covered by
// the GNU General Public License. However the source code for this file
// must still be made available in accordance with section (3) of the GNU
// General Public License v2.
//
// This exception does not invalidate any other reasons why a work based
// on this file might be covered by the GNU General Public License.
// -------------------------------------------
// ####ECOSGPLCOPYRIGHTEND####
//==========================================================================
//###DESCRIPTIONBEGIN####
//
// Author(s): bartv
// Date: 2005-03-29
//
//###DESCRIPTIONEND####
//========================================================================
#define __CYG_FB_IN_FRAMEBUF_C 1
#include <cyg/io/framebuf.h>
#include <cyg/infra/cyg_type.h>
#include <cyg/infra/cyg_ass.h>
#include <errno.h>
// Implementations of the framebuffer functions. Production code
// normally uses extern inline versions of these, defined in
// framebuf.h. However real functions are supplied here in case
// higher-level code chooses to take the address of a function for
// some reason. Also when building for debugging (CYGPKG_INFRA_DEBUG)
// the inline functions are suppressed and the real functions here
// contain lots of useful assertions.
int
cyg_fb_on(cyg_fb* fb)
{
int result;
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_on_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_off_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_write_pixel_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_read_pixel_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_write_hline_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_write_vline_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_fill_block_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_write_block_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_read_block_fn);
CYG_CHECK_FUNC_PTRC(fb->fb_move_block_fn);
result = (*(fb->fb_on_fn))(fb);
return result;
}
int
cyg_fb_off(cyg_fb* fb)
{
int result;
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_off_fn);
result = (*(fb->fb_off_fn))(fb);
return result;
}
void
cyg_fb_write_pixel(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y, cyg_fb_colour colour)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_write_pixel_fn);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
CYG_PRECONDITIONC((colour <= 1) || (fb->fb_depth > 1));
CYG_PRECONDITIONC((colour <= 3) || (fb->fb_depth > 2));
CYG_PRECONDITIONC((colour <= 15) || (fb->fb_depth > 4));
CYG_PRECONDITIONC((colour <= 255) || (fb->fb_depth > 8));
CYG_PRECONDITIONC((colour <= 65535) || (fb->fb_depth > 16));
(*(fb->fb_write_pixel_fn))(fb, x, y, colour);
}
cyg_fb_colour
cyg_fb_read_pixel(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_read_pixel_fn);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
return (*(fb->fb_read_pixel_fn))(fb, x, y);
}
void
cyg_fb_write_hline(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y, cyg_ucount16 len, cyg_fb_colour colour)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_write_hline_fn);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
CYG_PRECONDITIONC((x + len) <= fb->fb_width);
CYG_PRECONDITIONC((colour <= 1) || (fb->fb_depth > 1));
CYG_PRECONDITIONC((colour <= 3) || (fb->fb_depth > 2));
CYG_PRECONDITIONC((colour <= 15) || (fb->fb_depth > 4));
CYG_PRECONDITIONC((colour <= 255) || (fb->fb_depth > 8));
CYG_PRECONDITIONC((colour <= 65535) || (fb->fb_depth > 16));
(*(fb->fb_write_hline_fn))(fb, x, y, len, colour);
}
void
cyg_fb_write_vline(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y, cyg_ucount16 len, cyg_fb_colour colour)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_write_vline_fn);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
CYG_PRECONDITIONC((y + len) <= fb->fb_height);
CYG_PRECONDITIONC((colour <= 1) || (fb->fb_depth > 1));
CYG_PRECONDITIONC((colour <= 3) || (fb->fb_depth > 2));
CYG_PRECONDITIONC((colour <= 15) || (fb->fb_depth > 4));
CYG_PRECONDITIONC((colour <= 255) || (fb->fb_depth > 8));
CYG_PRECONDITIONC((colour <= 65535) || (fb->fb_depth > 16));
(*(fb->fb_write_vline_fn))(fb, x, y, len, colour);
}
void
cyg_fb_fill_block(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y, cyg_ucount16 width, cyg_ucount16 height, cyg_fb_colour colour)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_fill_block_fn);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
CYG_PRECONDITIONC((x + width) <= fb->fb_width);
CYG_PRECONDITIONC((y + height) <= fb->fb_height);
CYG_PRECONDITIONC((colour <= 1) || (fb->fb_depth > 1));
CYG_PRECONDITIONC((colour <= 3) || (fb->fb_depth > 2));
CYG_PRECONDITIONC((colour <= 15) || (fb->fb_depth > 4));
CYG_PRECONDITIONC((colour <= 255) || (fb->fb_depth > 8));
CYG_PRECONDITIONC((colour <= 65535) || (fb->fb_depth > 16));
(*(fb->fb_fill_block_fn))(fb, x, y, width, height, colour);
}
void
cyg_fb_write_block(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y, cyg_ucount16 width, cyg_ucount16 height,
const void* source, cyg_ucount16 offset, cyg_ucount16 stride)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_write_block_fn);
CYG_CHECK_DATA_PTRC(source);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
CYG_PRECONDITIONC((x + width) <= fb->fb_width);
CYG_PRECONDITIONC((y + height) <= fb->fb_height);
(*(fb->fb_write_block_fn))(fb, x, y, width, height, source, offset, stride);
}
void
cyg_fb_read_block(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y, cyg_ucount16 width, cyg_ucount16 height,
void* dest, cyg_ucount16 offset, cyg_ucount16 stride)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_read_block_fn);
CYG_CHECK_DATA_PTRC(dest);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
CYG_PRECONDITIONC((x + width) <= fb->fb_width);
CYG_PRECONDITIONC((y + height) <= fb->fb_height);
(*(fb->fb_read_block_fn))(fb, x, y, width, height, dest, offset, stride);
}
void
cyg_fb_move_block(cyg_fb* fb, cyg_ucount16 x, cyg_ucount16 y, cyg_ucount16 width, cyg_ucount16 height, cyg_ucount16 new_x, cyg_ucount16 new_y)
{
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_move_block_fn);
CYG_PRECONDITIONC(x != new_x);
CYG_PRECONDITIONC(y != new_y);
CYG_PRECONDITIONC(x < fb->fb_width);
CYG_PRECONDITIONC(y < fb->fb_height);
CYG_PRECONDITIONC((x + width) <= fb->fb_width);
CYG_PRECONDITIONC((y + height) <= fb->fb_height);
CYG_PRECONDITIONC(new_x < fb->fb_width);
CYG_PRECONDITIONC(new_y < fb->fb_height);
CYG_PRECONDITIONC((new_x + width) <= fb->fb_width);
CYG_PRECONDITIONC((new_y + height) <= fb->fb_height);
(*(fb->fb_move_block_fn))(fb, x, y, width, height, new_x, new_y);
}
int
cyg_fb_ioctl(cyg_fb* fb, cyg_uint16 key, void* data, size_t* len)
{
int result;
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_ioctl_fn);
result = (*(fb->fb_ioctl_fn))(fb, key, data, len);
return result;
}
void
cyg_fb_synch(cyg_fb* fb, cyg_ucount16 when)
{
#ifdef CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_DOUBLE_BUFFER
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_move_block_fn);
(*(fb->fb_synch_fn))(fb, when);
#else
// Synch is a no-op
#endif
}
void
cyg_fb_read_palette(cyg_fb* fb, cyg_ucount32 first, cyg_ucount32 count, void* dest)
{
#ifdef CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_PALETTE
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_read_palette_fn);
CYG_CHECK_DATA_PTRC(dest);
CYG_PRECONDITIONC( (first < 16) || (fb->fb_depth > 4));
CYG_PRECONDITIONC(((first + count) < 16) || (fb->fb_depth > 4));
CYG_PRECONDITIONC( (first < 256) || (fb->fb_depth > 8));
CYG_PRECONDITIONC(((first + count) <= 256) || (fb->fb_depth > 8));
(*(fb->fb_read_palette_fn))(fb, first, count, dest);
#else
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_ucount32, first);
CYG_UNUSED_PARAM(cyg_ucount32, count);
CYG_UNUSED_PARAM(void*, dest);
#endif
}
void
cyg_fb_write_palette(cyg_fb* fb, cyg_ucount32 first, cyg_ucount32 count, const void* source, cyg_ucount16 when)
{
#ifdef CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_WRITEABLE_PALETTE
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_write_palette_fn);
CYG_CHECK_DATA_PTRC(source);
CYG_PRECONDITIONC( (first < 16) || (fb->fb_depth > 4));
CYG_PRECONDITIONC(((first + count) < 16) || (fb->fb_depth > 4));
CYG_PRECONDITIONC( (first < 256) || (fb->fb_depth > 8));
CYG_PRECONDITIONC(((first + count) <= 256) || (fb->fb_depth > 8));
(*(fb->fb_write_palette_fn))(fb, first, count, source, when);
#else
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_ucount32, first);
CYG_UNUSED_PARAM(cyg_ucount32, count);
CYG_UNUSED_PARAM(const void*, source);
CYG_UNUSED_PARAM(cyg_ucount16, when);
#endif
}
cyg_fb_colour
cyg_fb_make_colour(cyg_fb* fb, cyg_ucount8 r, cyg_ucount8 g, cyg_ucount8 b)
{
#ifdef CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_TRUE_COLOUR
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_make_colour_fn);
CYG_PRECONDITIONC((r <= 0x00FF) && (g <= 0x00FF) && (b <= 0x00FF));
return (*(fb->fb_make_colour_fn))(fb, r, g, b);
#else
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_ucount8, r);
CYG_UNUSED_PARAM(cyg_ucount8, g);
CYG_UNUSED_PARAM(cyg_ucount8, b);
return 0;
#endif
}
void
cyg_fb_break_colour(cyg_fb* fb, cyg_fb_colour colour, cyg_ucount8* r, cyg_ucount8* g, cyg_ucount8* b)
{
#ifdef CYGHWR_IO_FRAMEBUF_FUNCTIONALITY_TRUE_COLOUR
CYG_CHECK_DATA_PTRC(fb);
CYG_PRECONDITIONC(CYG_FB_MAGIC == fb->fb_magic);
CYG_CHECK_FUNC_PTRC(fb->fb_break_colour_fn);
CYG_CHECK_DATA_PTRC(r);
CYG_CHECK_DATA_PTRC(g);
CYG_CHECK_DATA_PTRC(b);
(*(fb->fb_break_colour_fn))(fb, colour, r, g, b);
#else
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_fb_colour, colour);
CYG_UNUSED_PARAM(cyg_ucount8*, r);
CYG_UNUSED_PARAM(cyg_ucount8*, g);
CYG_UNUSED_PARAM(cyg_ucount8*, b);
#endif
}
// ----------------------------------------------------------------------------
// Dummy functions for use by device drivers when instantiating a cyg_fb
// structure
int
cyg_fb_nop_on(cyg_fb* fb)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
return 0;
}
int
cyg_fb_nop_off(cyg_fb* fb)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
return 0;
}
int
cyg_fb_nop_ioctl(cyg_fb* fb, cyg_uint16 key, void* data, size_t* len)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_uint16, key);
CYG_UNUSED_PARAM(void*, data);
CYG_UNUSED_PARAM(size_t*, len);
return ENOSYS;
}
void
cyg_fb_nop_synch(cyg_fb* fb, cyg_ucount16 when)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_ucount16, when);
}
void
cyg_fb_nop_write_palette(cyg_fb* fb, cyg_ucount32 first, cyg_ucount32 count, const void* source, cyg_ucount16 when)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_ucount32, first);
CYG_UNUSED_PARAM(cyg_ucount32, count);
CYG_UNUSED_PARAM(const void*, source);
CYG_UNUSED_PARAM(cyg_ucount16, when);
}
void
cyg_fb_nop_read_palette(cyg_fb* fb, cyg_ucount32 first, cyg_ucount32 count, void* dest)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_ucount32, first);
CYG_UNUSED_PARAM(cyg_ucount32, count);
CYG_UNUSED_PARAM(void*, dest);
}
cyg_fb_colour
cyg_fb_nop_make_colour(cyg_fb* fb, cyg_ucount8 r, cyg_ucount8 g, cyg_ucount8 b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_ucount8, r);
CYG_UNUSED_PARAM(cyg_ucount8, g);
CYG_UNUSED_PARAM(cyg_ucount8, b);
return 0;
}
cyg_fb_colour
cyg_fb_nop_make_color(cyg_fb* fb, cyg_ucount8 r, cyg_ucount8 g, cyg_ucount8 b)
__attribute__((alias("cyg_fb_nop_make_colour")));
void
cyg_fb_nop_break_colour(cyg_fb* fb, cyg_fb_colour colour, cyg_ucount8* r, cyg_ucount8* g, cyg_ucount8* b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_UNUSED_PARAM(cyg_fb_colour, colour);
CYG_UNUSED_PARAM(cyg_ucount8*, r);
CYG_UNUSED_PARAM(cyg_ucount8*, g);
CYG_UNUSED_PARAM(cyg_ucount8*, b);
}
void
cyg_fb_nop_break_color(cyg_fb* fb, cyg_fb_colour colour, cyg_ucount8* r, cyg_ucount8* g, cyg_ucount8* b)
__attribute__((alias("cyg_fb_nop_break_colour")));
// ----------------------------------------------------------------------------
// Utility functions for common true colour modes
cyg_fb_colour
cyg_fb_dev_make_colour_8bpp_true_332(cyg_fb* fb, cyg_ucount8 r, cyg_ucount8 g, cyg_ucount8 b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
return CYG_FB_MAKE_COLOUR_8BPP_TRUE_332(r, g, b);
}
void
cyg_fb_dev_break_colour_8bpp_true_332(cyg_fb* fb, cyg_fb_colour colour, cyg_ucount8* r, cyg_ucount8* g, cyg_ucount8* b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_FB_BREAK_COLOUR_8BPP_TRUE_332(colour, r, g, b);
}
cyg_fb_colour
cyg_fb_dev_make_colour_16bpp_true_565(cyg_fb* fb, cyg_ucount8 r, cyg_ucount8 g, cyg_ucount8 b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
return CYG_FB_MAKE_COLOUR_16BPP_TRUE_565(r, g, b);
}
void
cyg_fb_dev_break_colour_16bpp_true_565(cyg_fb* fb, cyg_fb_colour colour, cyg_ucount8* r, cyg_ucount8* g, cyg_ucount8* b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_FB_BREAK_COLOUR_16BPP_TRUE_565(colour, r, g, b);
}
cyg_fb_colour
cyg_fb_dev_make_colour_16bpp_true_555(cyg_fb* fb, cyg_ucount8 r, cyg_ucount8 g, cyg_ucount8 b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
return CYG_FB_MAKE_COLOUR_16BPP_TRUE_555(r, g, b);
}
void
cyg_fb_dev_break_colour_16bpp_true_555(cyg_fb* fb, cyg_fb_colour colour, cyg_ucount8* r, cyg_ucount8* g, cyg_ucount8* b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_FB_BREAK_COLOUR_16BPP_TRUE_555(colour, r, g, b);
}
cyg_fb_colour
cyg_fb_dev_make_colour_32bpp_true_0888(cyg_fb* fb, cyg_ucount8 r, cyg_ucount8 g, cyg_ucount8 b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
return CYG_FB_MAKE_COLOUR_32BPP_TRUE_0888(r, g, b);
}
void
cyg_fb_dev_break_colour_32bpp_true_0888(cyg_fb* fb, cyg_fb_colour colour, cyg_ucount8* r, cyg_ucount8* g, cyg_ucount8* b)
{
CYG_UNUSED_PARAM(cyg_fb*, fb);
CYG_FB_BREAK_COLOUR_32BPP_TRUE_0888(colour, r, g, b);
}
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