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/*
** ClanLib SDK
** Copyright (c) 1997-2005 The ClanLib Team
**
** This software is provided 'as-is', without any express or implied
** warranty. In no event will the authors be held liable for any damages
** arising from the use of this software.
**
** Permission is granted to anyone to use this software for any purpose,
** including commercial applications, and to alter it and redistribute it
** freely, subject to the following restrictions:
**
** 1. The origin of this software must not be misrepresented; you must not
** claim that you wrote the original software. If you use this software
** in a product, an acknowledgment in the product documentation would be
** appreciated but is not required.
** 2. Altered source versions must be plainly marked as such, and must not be
** misrepresented as being the original software.
** 3. This notice may not be removed or altered from any source distribution.
**
** Note: Some of the libraries ClanLib may link to may have additional
** requirements or restrictions.
**
** File Author(s):
**
** Magnus Norddahl
** (if your name is missing here, please add it)
*/
#include "Display/display_precomp.h"
#include "API/Display/pixel_buffer.h"
#include "API/Core/IOData/cl_endian.h"
#include "pixel_buffer_generic.h"
/////////////////////////////////////////////////////////////////////////////
// CL_PixelBuffer_Generic construction:
/////////////////////////////////////////////////////////////////////////////
// CL_PixelBuffer_Generic operations:
void CL_PixelBuffer_Generic::convert(void* in_buffer, const CL_PixelFormat& in_pf, int in_pitch, void* out_buffer, const CL_PixelFormat& out_pf, int out_pitch, const CL_Size& size)
{
cl_assert(in_pf.get_type() == pixelformat_rgba);
cl_assert(out_pf.get_type() == pixelformat_rgba);
const int in_bpp = in_pf.get_depth()/8;
const int out_bpp = out_pf.get_depth()/8;
cl_assert(in_bpp <= 4 && in_bpp >= 1);
cl_assert(out_bpp <= 4 && out_bpp >=1);
char* in_p = static_cast<char*>(in_buffer);
char* out_p = static_cast<char*>(out_buffer);
if (in_pf == out_pf)
{
const int in_line_bytes = in_bpp*size.width;
for (int y = 0; y < size.height; y++, in_p += in_pitch, out_p += out_pitch)
memcpy(out_p, in_p, in_line_bytes);
}
else
{
const int in_r_shift = CL_PixelFormat::get_mask_shift(in_pf.get_red_mask());
const int in_g_shift = CL_PixelFormat::get_mask_shift(in_pf.get_green_mask());
const int in_b_shift = CL_PixelFormat::get_mask_shift(in_pf.get_blue_mask());
const int in_a_shift = CL_PixelFormat::get_mask_shift(in_pf.get_alpha_mask());
const int in_r_bits = CL_PixelFormat::get_mask_bits(in_pf.get_red_mask());
const int in_g_bits = CL_PixelFormat::get_mask_bits(in_pf.get_green_mask());
const int in_b_bits = CL_PixelFormat::get_mask_bits(in_pf.get_blue_mask());
const int in_a_bits = CL_PixelFormat::get_mask_bits(in_pf.get_alpha_mask());
const int in_r_bitmask = CL_PixelFormat::get_bitmask(in_r_bits, 0);
const int in_g_bitmask = CL_PixelFormat::get_bitmask(in_g_bits, 0);
const int in_b_bitmask = CL_PixelFormat::get_bitmask(in_b_bits, 0);
const int in_a_bitmask = CL_PixelFormat::get_bitmask(in_a_bits, 0);
const int out_r_shift = CL_PixelFormat::get_mask_shift(out_pf.get_red_mask());
const int out_g_shift = CL_PixelFormat::get_mask_shift(out_pf.get_green_mask());
const int out_b_shift = CL_PixelFormat::get_mask_shift(out_pf.get_blue_mask());
const int out_a_shift = CL_PixelFormat::get_mask_shift(out_pf.get_alpha_mask());
const int out_r_bits = CL_PixelFormat::get_mask_bits(out_pf.get_red_mask());
const int out_g_bits = CL_PixelFormat::get_mask_bits(out_pf.get_green_mask());
const int out_b_bits = CL_PixelFormat::get_mask_bits(out_pf.get_blue_mask());
const int out_a_bits = CL_PixelFormat::get_mask_bits(out_pf.get_alpha_mask());
const bool in_has_ck = in_pf.has_colorkey();
unsigned int in_ck = 0;
if (in_has_ck)
in_ck = in_pf.get_colorkey();
const bool out_has_ck = out_pf.has_colorkey();
unsigned int out_ck = 0;
if (out_has_ck)
out_ck = out_pf.get_colorkey();
for (int y = 0; y < size.height; y++, in_p += in_pitch, out_p += out_pitch)
{
char* in_p2 = in_p;
char* out_p2 = out_p;
for (int x = 0; x < size.width; x++, in_p2 += in_bpp, out_p2 += out_bpp)
{
unsigned int in_pixel = 0;
memcpy(&in_pixel, in_p2, in_bpp);
if (CL_Endian::is_system_big())
{
for (int bpp=4; bpp && in_bpp < bpp; bpp--)
in_pixel >>= 8;
}
// decode
unsigned int in_r = 0, in_g = 0, in_b = 0, in_a = 0xffffffff;
if (in_r_bitmask)
{
in_r = ((in_pixel >> in_r_shift) & in_r_bitmask);
if (in_r & 1)
in_r = (in_r << (32 - in_r_bits)) | CL_PixelFormat::get_bitmask(32 - in_r_bits, 0);
else
in_r <<= 32 - in_r_bits;
}
if (in_g_bitmask)
{
in_g = ((in_pixel >> in_g_shift) & in_g_bitmask);
if (in_g & 1)
in_g = (in_g << (32 - in_g_bits)) | CL_PixelFormat::get_bitmask(32 - in_g_bits, 0);
else
in_g <<= 32 - in_g_bits;
}
if (in_b_bitmask)
{
in_b = ((in_pixel >> in_b_shift) & in_b_bitmask);
if (in_b & 1)
in_b = (in_b << (32 - in_b_bits)) | CL_PixelFormat::get_bitmask(32 - in_b_bits, 0);
else
in_b <<= 32 - in_b_bits;
}
if (in_a_bitmask)
{
in_a = ((in_pixel >> in_a_shift) & in_a_bitmask);
if (in_a & 1)
in_a = (in_a << (32 - in_a_bits)) | CL_PixelFormat::get_bitmask(32 - in_a_bits, 0);
else
in_a <<= 32 - in_a_bits;
}
unsigned int out_pixel;
bool encode;
if (!out_a_bits && (in_a == 0) && out_has_ck)
{
out_pixel = out_ck;
encode = false;
}
else if (in_has_ck && (in_pixel == in_ck))
{
if (out_has_ck)
{
out_pixel = out_ck;
encode = false;
}
else
{
in_a = 0;
encode = true;
}
}
else
encode = true;
// encode
if (encode)
{
out_pixel = 0;
if (out_r_bits)
out_pixel |= (in_r >> (32 - out_r_bits)) << out_r_shift;
if (out_g_bits)
out_pixel |= (in_g >> (32 - out_g_bits)) << out_g_shift;
if (out_b_bits)
out_pixel |= (in_b >> (32 - out_b_bits)) << out_b_shift;
if (out_a_bits)
out_pixel |= (in_a >> (32 - out_a_bits)) << out_a_shift;
//at this point we need to do one more colorkey check, otherwise it will fail when the input is
//a different format than the output --mrfun Nov 10 2006
if (in_has_ck && (in_ck == out_pixel))
{
//should be transparent
out_pixel = 0;
}
}
memcpy(out_p2, &out_pixel, out_bpp);
}
}
}
}
void CL_PixelBuffer_Generic::convert_pal(void* in_buffer, const CL_PixelFormat& in_pf, int in_pitch, const CL_Palette& in_pal, void* out_buffer, const CL_PixelFormat& out_pf, int out_pitch, const CL_Size& size)
{
cl_assert(in_pf.get_type() == pixelformat_index);
cl_assert(out_pf.get_type() == pixelformat_rgba);
const int in_bpp = in_pf.get_depth()/8;
const int out_bpp = out_pf.get_depth()/8;
char* in_p = static_cast<char*>(in_buffer);
char* out_p = static_cast<char*>(out_buffer);
const int out_r_shift = CL_PixelFormat::get_mask_shift(out_pf.get_red_mask());
const int out_g_shift = CL_PixelFormat::get_mask_shift(out_pf.get_green_mask());
const int out_b_shift = CL_PixelFormat::get_mask_shift(out_pf.get_blue_mask());
const int out_a_shift = CL_PixelFormat::get_mask_shift(out_pf.get_alpha_mask());
const int out_r_bits = CL_PixelFormat::get_mask_bits(out_pf.get_red_mask());
const int out_g_bits = CL_PixelFormat::get_mask_bits(out_pf.get_green_mask());
const int out_b_bits = CL_PixelFormat::get_mask_bits(out_pf.get_blue_mask());
const int out_a_bits = CL_PixelFormat::get_mask_bits(out_pf.get_alpha_mask());
const bool big = CL_Endian::is_system_big();
const bool in_has_ck = in_pf.has_colorkey();
unsigned int in_ck = 0;
if (in_has_ck)
in_ck = in_pf.get_colorkey();
for (int y = 0; y < size.height; y++, in_p += in_pitch, out_p += out_pitch)
{
char* in_p2 = in_p;
char* out_p2 = out_p;
for (int x = 0; x < size.width; x++, in_p2 += in_bpp, out_p2 += out_bpp)
{
//I took out the SWAP_IF_BIG/memset, this will always be a single byte - mrfun
unsigned int in_pixel = (unsigned char)*in_p2;
// decode
unsigned int in_r = 0, in_g = 0, in_b = 0, in_a = 0xffffffff;
in_r = in_pal.colors[in_pixel].get_red();
if (in_r & 1)
in_r = (in_r << (32 - 8)) | CL_PixelFormat::get_bitmask(32 - 8, 0);
else
in_r <<= 32 - 8;
in_g = in_pal.colors[in_pixel].get_green();
if (in_g & 1)
in_g = (in_g << (32 - 8)) | CL_PixelFormat::get_bitmask(32 - 8, 0);
else
in_g <<= 32 - 8;
in_b = in_pal.colors[in_pixel].get_blue();
if (in_b & 1)
in_b = (in_b << (32 - 8)) | CL_PixelFormat::get_bitmask(32 - 8, 0);
else
in_b <<= 32 - 8;
in_a = in_pal.colors[in_pixel].get_alpha();
if (in_a & 1)
in_a = (in_a << (32 - 8)) | CL_PixelFormat::get_bitmask(32 - 8, 0);
else
in_a <<= 32 - 8;
unsigned int out_pixel;
if (in_has_ck && (in_pal.colors[in_pixel].color == in_ck))
{
in_a = 0;
}
out_pixel = 0;
if (out_r_bits)
out_pixel |= (in_r >> (32 - out_r_bits)) << out_r_shift;
if (out_g_bits)
out_pixel |= (in_g >> (32 - out_g_bits)) << out_g_shift;
if (out_b_bits)
out_pixel |= (in_b >> (32 - out_b_bits)) << out_b_shift;
if (out_a_bits)
out_pixel |= (in_a >> (32 - out_a_bits)) << out_a_shift;
//this fixes a bug on big endian when converting 8 bit to 24 bit, the
//garbage alpha was copied instead of a color -mrfun
if (big && out_bpp == 3)
{
memcpy(out_p2, ((char*)&out_pixel)+1, out_bpp);
} else
{
memcpy(out_p2, &out_pixel, out_bpp);
}
}
}
}
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