83 lines
2.5 KiB
C
Executable File
83 lines
2.5 KiB
C
Executable File
/*
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* Copyright 2010 Ole Loots <ole@monochrom.net>
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*
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* This file is part of NetSurf, http://www.netsurf-browser.org/
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*
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* NetSurf is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; version 2 of the License.
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*
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* NetSurf is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef NS_ATARI_BITMAP_H
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#define NS_ATARI_BITMAP_H
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#include <gem.h>
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#include <Hermes/Hermes.h>
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#define NS_BMP_DEFAULT_BPP 4
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/* Flags for init_mfdb function: */
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#define MFDB_FLAG_STAND 0x01
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#define MFDB_FLAG_ZEROMEM 0x02
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#define MFDB_FLAG_NOALLOC 0x04
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#define BITMAP_SHRINK 0
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#define BITMAP_GROW 1024 /* Don't realloc when bitmap size shrinks */
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#define BITMAP_CLEAR 2048 /* Zero bitmap memory */
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/*
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calculates MFDB compatible rowstride (in number of bits)
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*/
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#define MFDB_STRIDE( w ) (((w & 15) != 0) ? (w | 15)+1 : w)
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/*
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Calculate size of an mfdb,
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params:
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bpp: Bits per pixel,
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stride: Word aligned rowstride (width) as returned by MFDB_STRIDE,
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h: Height in pixels
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*/
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#define MFDB_SIZE( bpp, stride, h ) ( ((stride >> 3) * h) * bpp )
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struct bitmap {
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int width;
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int height;
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uint8_t *pixdata;
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bool opaque;
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short bpp; /* number of BYTES! per pixel */
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size_t rowstride;
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struct bitmap * resized;
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MFDB native;
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bool converted;
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};
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void * bitmap_create_ex( int w, int h, short bpp, int rowstride, unsigned int state, void * pixdata );
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void bitmap_to_mfdb(void * bitmap, MFDB * out);
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void * bitmap_realloc( int w, int h, short bpp, int rowstride, unsigned int state, void * bmp );
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size_t bitmap_buffer_size( void * bitmap ) ;
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bool bitmap_resize(struct bitmap * img, HermesHandle hermes_h,
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HermesFormat *fmt, int nw, int nh);
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/*
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setup an MFDB struct and allocate memory for it when it is needed.
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If bpp == 0, this function assumes that the MFDB shall point to the screen
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and will not allocate any memory (mfdb.fd_addr == 0).
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The function will return 0 when the memory allocation fails
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( out of memory), otherwise it returns the size of the mfdb.fd_addr
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as number of bytes.
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*/
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int init_mfdb(int bpp, int w, int h, uint32_t flags, MFDB * out );
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#endif
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