From 124e4cd78814e368488d8e86c15f95223f365a44 Mon Sep 17 00:00:00 2001 From: John Mark Bell Date: Wed, 5 Jan 2011 21:02:22 +0000 Subject: Atari frontend (credit: Ole Loots) svn path=/trunk/netsurf/; revision=11218 --- atari/bitmap.c | 384 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 384 insertions(+) create mode 100644 atari/bitmap.c (limited to 'atari/bitmap.c') diff --git a/atari/bitmap.c b/atari/bitmap.c new file mode 100644 index 000000000..d6bd13667 --- /dev/null +++ b/atari/bitmap.c @@ -0,0 +1,384 @@ +/* + * Copyright 2010 Ole Loots + * + * This file is part of NetSurf, http://www.netsurf-browser.org/ + * + * NetSurf 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; version 2 of the License. + * + * NetSurf 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 this program. If not, see . + */ + +#include +#include +#include +#include + + +#include "assert.h" +#include "image/bitmap.h" +#include "atari/bitmap.h" +#include "atari/plot.h" +#include "utils/log.h" + + + +/** + * Create a bitmap. + * + * \param width width of image in pixels + * \param height width of image in pixels + * \param state a flag word indicating the initial state + * \return an opaque struct bitmap, or NULL on memory exhaustion + */ + +void *bitmap_create(int w, int h, unsigned int state) +{ + return bitmap_create_ex( w, h, NS_BMP_DEFAULT_BPP, w * NS_BMP_DEFAULT_BPP, state, NULL ); +} + +/** + * Create a bitmap. + * + * \param w width of image in pixels + * \param h height of image in pixels + * \param bpp number of BYTES per pixel + * \param rowstride linewidth in bytes + * \param state a flag word indicating the initial state + * \param pixdata NULL or an memory address to use as the bitmap pixdata + * \return an opaque struct bitmap, or NULL on memory exhaustion + */ +void * bitmap_create_ex( int w, int h, short bpp, int rowstride, unsigned int state, void * pixdata ) +{ + struct bitmap * bitmap; + + LOG(("width %d, height %d, state %u",w, h, state )); + + if( rowstride == 0) { + rowstride = bpp * w; + } + + assert( rowstride >= w * bpp ); + bitmap = calloc(1 , sizeof(struct bitmap) ); + if (bitmap) { + if( pixdata == NULL) { + bitmap->pixdata = calloc(1, (rowstride * h)+128); + } + else { + bitmap->pixdata = pixdata; + } + + if (bitmap->pixdata != NULL) { + bitmap->width = w; + bitmap->height = h; + bitmap->opaque = false; + bitmap->bpp = bpp; + bitmap->resized = NULL; + bitmap->rowstride = rowstride; + } else { + free(bitmap); + bitmap=NULL; + LOG(("Out of memory!")); + } + } + LOG(("bitmap %p", bitmap)); + return bitmap; +} + +void * bitmap_realloc( int w, int h, short bpp, int rowstride, unsigned int state, void * bmp ) +{ + struct bitmap * bitmap = bmp; + int newsize = rowstride * h; + + if( bitmap == NULL ) { + return( NULL ); + } + + if( bitmap->pixdata == NULL ) { + assert( 1 == 0 ); + /* add some buffer for bad code */ + bitmap->pixdata = malloc( newsize + 128 ); + } else { + int oldsize = bitmap->rowstride * bitmap->height; + bool doalloc = ( state == BITMAP_GROW) ? (newsize > oldsize) : (newsize != oldsize); + if( newsize > oldsize ) + assert( doalloc == true ); + if( doalloc ) { + bitmap->pixdata = realloc( bitmap->pixdata, newsize + 128 ); + if( bitmap->pixdata == NULL ) + return( NULL ); + } + } + + bitmap->width = w; + bitmap->height = h; + bitmap->opaque = false; + bitmap->bpp = bpp; + bitmap->resized = NULL; + bitmap->rowstride = rowstride; + bitmap_modified( bitmap ); + return( bitmap ); +} + +void bitmap_to_mfdb(void * bitmap, MFDB * out) +{ + struct bitmap * bm; + uint32_t dstsize; + uint8_t * tmp; + size_t dststride, oldstride; + + bm = bitmap; + assert( out != NULL ); + assert( bm->pixdata != NULL ); + + oldstride = bitmap_get_rowstride( bm ); + dststride = MFDB_STRIDE( bm->width ); + + if( oldstride != dststride * bm->bpp ) + { + /* we need to convert the img to new rowstride */ + tmp = bm->pixdata; + bm->pixdata = calloc(1, dststride * bm->bpp * bm->height ); + if( tmp == NULL ){ + bm->pixdata = tmp; + out->fd_addr = NULL; + return; + } + bm->rowstride = dststride * bm->bpp; + int i=0; + for( i=0; iheight; i++) { + memcpy( (bm->pixdata+i*bm->rowstride), (tmp + i*oldstride), oldstride); + } + free( tmp ); + } + out->fd_w = dststride; + out->fd_h = bm->height; + out->fd_wdwidth = dststride >> 4; + out->fd_addr = bm->pixdata; + out->fd_stand = 0; + out->fd_nplanes = (short)bm->bpp; + out->fd_r1 = out->fd_r2 = out->fd_r3 = 0; +} + + +/** + * Return a pointer to the pixel data in a bitmap. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \return pointer to the pixel buffer + * + * The pixel data is packed as BITMAP_FORMAT, possibly with padding at the end + * of rows. The width of a row in bytes is given by bitmap_get_rowstride(). + */ + +unsigned char *bitmap_get_buffer(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return NULL; + } + + return bm->pixdata; +} + +size_t bitmap_buffer_size( void * bitmap ) +{ + struct bitmap * bm = bitmap; + if( bm == NULL ) + return 0; + return( bm->rowstride * bm->height ); +} + + +/** + * Find the width of a pixel row in bytes. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \return width of a pixel row in the bitmap + */ + +size_t bitmap_get_rowstride(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return 0; + } + return bm->rowstride; +} + + +/** + * Free a bitmap. + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ + +void bitmap_destroy(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return; + } + + if( bm->resized != NULL ) { + bitmap_destroy(bm->resized); + } + free(bm->pixdata); + free(bm); +} + + +/** + * Save a bitmap in the platform's native format. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \param path pathname for file + * \return true on success, false on error and error reported + */ + +bool bitmap_save(void *bitmap, const char *path, unsigned flags) +{ + return true; +} + +/** + * The bitmap image has changed, so flush any persistant cache. + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ +void bitmap_modified(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if( bm->resized != NULL ) { + bitmap_destroy( bm->resized ); + bm->resized = NULL; + } +} + + +/** + * The bitmap image can be suspended. + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \param private_word a private word to be returned later + * \param suspend the function to be called upon suspension + * \param resume the function to be called when resuming + */ +void bitmap_set_suspendable(void *bitmap, void *private_word, + void (*invalidate)(void *bitmap, void *private_word)) { +} + +/** + * Sets whether a bitmap should be plotted opaque + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \param opaque whether the bitmap should be plotted opaque + */ +void bitmap_set_opaque(void *bitmap, bool opaque) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return; + } + + LOG(("setting bitmap %p to %s", bm, opaque?"opaque":"transparent")); + bm->opaque = opaque; +} + + +/** + * Tests whether a bitmap has an opaque alpha channel + * + * \param bitmap a bitmap, as returned by bitmap_create() + * \return whether the bitmap is opaque + */ +bool bitmap_test_opaque(void *bitmap) +{ + int tst; + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return false; + } + + tst = bm->width * bm->height; + + while (tst-- > 0) { + if (bm->pixdata[(tst << 2) + 3] != 0xff) { + LOG(("bitmap %p has transparency",bm)); + return false; + } + } + LOG(("bitmap %p is opaque", bm)); + return true; +} + + +/** + * Gets whether a bitmap should be plotted opaque + * + * \param bitmap a bitmap, as returned by bitmap_create() + */ +bool bitmap_get_opaque(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return false; + } + + return bm->opaque; +} + +int bitmap_get_width(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return 0; + } + + return(bm->width); +} + +int bitmap_get_height(void *bitmap) +{ + struct bitmap *bm = bitmap; + + if (bitmap == NULL) { + LOG(("NULL bitmap!")); + return 0; + } + return(bm->height); +} + +size_t bitmap_get_bpp(void *bitmap) +{ + struct bitmap *bm = bitmap; + return bm->bpp; +} + +/* + * Local Variables: + * c-basic-offset:8 + * End: + */ -- cgit v1.2.3