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-rw-r--r--frontends/atari/bitmap.c455
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diff --git a/frontends/atari/bitmap.c b/frontends/atari/bitmap.c
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+/*
+ * Copyright 2010 Ole Loots <ole@monochrom.net>
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ */
+
+#include <inttypes.h>
+#include <sys/types.h>
+#include <string.h>
+#include <assert.h>
+#include <stdlib.h>
+
+#include "utils/nsoption.h"
+#include "utils/log.h"
+#include "image/bitmap.h"
+#include "desktop/mouse.h"
+
+#include "atari/bitmap.h"
+#include "atari/plot/plot.h"
+
+
+/*
+ * param bpp bits per pixel,
+ * param w width of the buffer (in pixel)
+ * param h height of the buffer (in pixel)
+ * param flags MFDB_FLAG_NOALLOC | MFDB_FLAG_ZEROMEM | MFDB_FLAG_STAND
+ * returns size of the fd_addr buffer required or allocated
+*/
+int init_mfdb(int bpp, int w, int h, uint32_t flags, MFDB * out )
+{
+ int dststride;
+ dststride = MFDB_STRIDE( w );
+ int size = MFDB_SIZE( bpp, dststride, h );
+ if( bpp > 0 ) {
+ if( (flags & MFDB_FLAG_NOALLOC) == 0 ) {
+ out->fd_addr = malloc( size );
+ if( out->fd_addr == NULL ){
+ return( 0 );
+ }
+ if( (flags & MFDB_FLAG_ZEROMEM) ){
+ memset( out->fd_addr, 0, size );
+ }
+ }
+ out->fd_stand = (flags & MFDB_FLAG_STAND) ? 1 : 0;
+ out->fd_nplanes = (short)bpp;
+ out->fd_r1 = out->fd_r2 = out->fd_r3 = 0;
+ } else {
+ memset( out, 0, sizeof(MFDB) );
+ }
+ out->fd_w = dststride;
+ out->fd_h = h;
+ out->fd_wdwidth = dststride >> 4;
+ return( size );
+}
+
+
+/**
+ * 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
+ */
+static void *atari_bitmap_create_ex( int w, int h, short bpp, int rowstride, unsigned int state, void * pixdata )
+{
+ struct bitmap * bitmap;
+
+ LOG("width %d (rowstride: %d, bpp: %d), height %d, state %u", w, rowstride, bpp, 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 = (state & BITMAP_OPAQUE) ? true : 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;
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+void *atari_bitmap_create(int w, int h, unsigned int state)
+{
+ return atari_bitmap_create_ex( w, h, NS_BMP_DEFAULT_BPP, w * NS_BMP_DEFAULT_BPP, state, NULL );
+}
+
+/**
+ * The bitmap image has changed, so flush any persistant cache.
+ *
+ * \param bitmap a bitmap, as returned by bitmap_create()
+ */
+static void bitmap_modified(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+ if( bm->resized != NULL ) {
+ atari_bitmap_destroy( bm->resized );
+ bm->resized = NULL;
+ }
+ if( bm->converted ){
+ if( bm->pixdata != bm->native.fd_addr ){
+ free( bm->native.fd_addr );
+ }
+ bm->native.fd_addr = NULL;
+ bm->converted = false;
+ }
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+void *atari_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 );
+ }
+
+ assert( bitmap->pixdata != NULL );
+ int oldsize = bitmap->rowstride * bitmap->height;
+ bool doalloc = (state & BITMAP_GROW) ? (newsize > oldsize) : (newsize != oldsize);
+ if( newsize > oldsize )
+ assert( doalloc == true );
+ if( doalloc ) {
+ // TODO: set red band to a specific value and check the red band
+ // on bitmap_destroy()
+ bitmap->pixdata = realloc( bitmap->pixdata, newsize + 128 );
+ if( bitmap->pixdata == NULL )
+ return( NULL );
+ }
+
+ if( state & BITMAP_CLEAR ){
+ memset( bitmap->pixdata, 0x00, newsize + 128 );
+ }
+
+ bitmap->width = w;
+ bitmap->height = h;
+ bitmap->bpp = bpp;
+ bitmap->resized = NULL;
+ bitmap->rowstride = rowstride;
+ bitmap_modified( bitmap );
+ return( bitmap );
+}
+
+
+/**
+ * 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().
+ */
+static unsigned char *bitmap_get_buffer(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+
+ if (bitmap == NULL) {
+ LOG("NULL bitmap!");
+ return NULL;
+ }
+
+ return bm->pixdata;
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+size_t atari_bitmap_buffer_size(void *bitmap)
+{
+ struct bitmap * bm = bitmap;
+ if( bm == NULL )
+ return 0;
+ return( bm->rowstride * bm->height );
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+size_t atari_bitmap_get_rowstride(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+
+ if (bitmap == NULL) {
+ LOG("NULL bitmap!");
+ return 0;
+ }
+ return bm->rowstride;
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+void atari_bitmap_destroy(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+
+ if (bitmap == NULL) {
+ LOG("NULL bitmap!");
+ return;
+ }
+
+ if( bm->resized != NULL ) {
+ atari_bitmap_destroy(bm->resized);
+ }
+ if( bm->converted && ( bm->native.fd_addr != bm->pixdata ) ) {
+ free( bm->native.fd_addr );
+ }
+ 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
+ * \param flags flags controlling how the bitmap is saved.
+ * \return true on success, false on error and error reported
+ */
+
+static bool bitmap_save(void *bitmap, const char *path, unsigned flags)
+{
+ return true;
+}
+
+
+/**
+ * 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
+ */
+static 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
+ */
+static bool bitmap_test_opaque(void *bitmap)
+{
+ int tst;
+ struct bitmap *bm = bitmap;
+
+ if (bitmap == NULL) {
+ LOG("NULL bitmap!");
+ return false;
+ }
+
+ if( nsoption_int(atari_transparency) == 0 ){
+ return( true );
+ }
+
+ 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;
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+bool atari_bitmap_get_opaque(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+
+ if (bitmap == NULL) {
+ LOG("NULL bitmap!");
+ return false;
+ }
+
+ return bm->opaque;
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+int atari_bitmap_get_width(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+
+ if (bitmap == NULL) {
+ LOG("NULL bitmap!");
+ return 0;
+ }
+
+ return(bm->width);
+}
+
+
+/* exported interface documented in atari/bitmap.h */
+int atari_bitmap_get_height(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+
+ if (bitmap == NULL) {
+ LOG("NULL bitmap!");
+ return 0;
+ }
+ return(bm->height);
+}
+
+
+/**
+ * Gets the number of BYTES per pixel.
+ */
+static size_t bitmap_get_bpp(void *bitmap)
+{
+ struct bitmap *bm = bitmap;
+ return bm->bpp;
+}
+
+/* exported interface documented in atari/bitmap.h */
+bool atari_bitmap_resize(struct bitmap *img, HermesHandle hermes_h,
+ HermesFormat *fmt, int nw, int nh)
+{
+ unsigned int state = 0;
+ short bpp = bitmap_get_bpp( img );
+ int stride = atari_bitmap_get_rowstride( img );
+ int err;
+
+ if( img->resized != NULL ) {
+ if( img->resized->width != nw || img->resized->height != nh ) {
+ atari_bitmap_destroy( img->resized );
+ img->resized = NULL;
+ } else {
+ /* the bitmap is already resized */
+ return(true);
+ }
+ }
+
+ /* allocate the mem for resized bitmap */
+ if (img->opaque == true) {
+ state |= BITMAP_OPAQUE;
+ }
+ img->resized = atari_bitmap_create_ex( nw, nh, bpp, nw*bpp, state, NULL );
+ if( img->resized == NULL ) {
+ printf("W: %d, H: %d, bpp: %d\n", nw, nh, bpp);
+ assert(img->resized);
+ return(false);
+ }
+
+ /* allocate an converter, only for resizing */
+ err = Hermes_ConverterRequest( hermes_h,
+ fmt,
+ fmt
+ );
+ if( err == 0 ) {
+ return(false);
+ }
+
+ err = Hermes_ConverterCopy( hermes_h,
+ img->pixdata,
+ 0, /* x src coord of top left in pixel coords */
+ 0, /* y src coord of top left in pixel coords */
+ atari_bitmap_get_width( img ),
+ atari_bitmap_get_height( img ),
+ stride, /* stride as bytes */
+ img->resized->pixdata,
+ 0, /* x dst coord of top left in pixel coords */
+ 0, /* y dst coord of top left in pixel coords */
+ nw, nh,
+ atari_bitmap_get_rowstride(img->resized) /* stride as bytes */
+ );
+ if( err == 0 ) {
+ atari_bitmap_destroy( img->resized );
+ img->resized = NULL;
+ return(false);
+ }
+
+ return(true);
+}
+
+static nserror bitmap_render(struct bitmap *bitmap, struct hlcache_handle *content)
+{
+ return NSERROR_NOT_IMPLEMENTED;
+}
+
+static struct gui_bitmap_table bitmap_table = {
+ .create = atari_bitmap_create,
+ .destroy = atari_bitmap_destroy,
+ .set_opaque = bitmap_set_opaque,
+ .get_opaque = atari_bitmap_get_opaque,
+ .test_opaque = bitmap_test_opaque,
+ .get_buffer = bitmap_get_buffer,
+ .get_rowstride = atari_bitmap_get_rowstride,
+ .get_width = atari_bitmap_get_width,
+ .get_height = atari_bitmap_get_height,
+ .get_bpp = bitmap_get_bpp,
+ .save = bitmap_save,
+ .modified = bitmap_modified,
+ .render = bitmap_render,
+};
+
+struct gui_bitmap_table *atari_bitmap_table = &bitmap_table;
+
+/*
+ * Local Variables:
+ * c-basic-offset:8
+ * End:
+ */