1 files changed, 137 insertions, 0 deletions
diff --git a/frontends/atari/bitmap.h b/frontends/atari/bitmap.h
new file mode 100644
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+++ b/frontends/atari/bitmap.h
@@ -0,0 +1,137 @@
+/*
+ * 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/>.
+ */
+
+/**
+ * \file
+ * Atari bitmap handling implementation.
+ */
+
+#ifndef NS_ATARI_BITMAP_H
+#define NS_ATARI_BITMAP_H
+
+#include <gem.h>
+#include <Hermes/Hermes.h>
+
+#define NS_BMP_DEFAULT_BPP 4
+
+/* Flags for init_mfdb function: */
+#define MFDB_FLAG_STAND	  0x01
+#define MFDB_FLAG_ZEROMEM 0x02
+#define MFDB_FLAG_NOALLOC 0x04
+
+#define BITMAP_SHRINK	  0
+#define BITMAP_GROW	  1024 /* Don't realloc when bitmap size shrinks */
+#define BITMAP_CLEAR	  2048 /* Zero bitmap memory                     */
+
+
+/**
+ * Calculates MFDB compatible rowstride (in number of bits)
+ */
+#define MFDB_STRIDE( w ) (((w & 15) != 0) ? (w | 15)+1 : w)
+
+
+/**
+ * Calculate size of an mfdb,
+ *
+ * \param bpp Bits per pixel.
+ * \param stride Word aligned rowstride (width) as returned by MFDB_STRIDE,
+ * \param h Height in pixels.
+*/
+#define MFDB_SIZE( bpp, stride, h ) ( ((stride >> 3) * h) * bpp )
+
+struct gui_bitmap_table *atari_bitmap_table;
+
+struct bitmap {
+	int width;
+	int height;
+	uint8_t *pixdata;
+	bool opaque;
+	short bpp;				/* number of BYTES! per pixel */
+	size_t rowstride;
+	struct bitmap * resized;
+	MFDB native;
+	bool converted;
+};
+
+
+
+/**
+ * setup an MFDB struct and allocate memory for it when it is needed.
+ *
+ * If bpp == 0, this function assumes that the MFDB shall point to the
+ *       screen and will not allocate any memory (mfdb.fd_addr == 0).
+ *
+ * \return 0 when the memory allocation fails (out of memory),
+ *         otherwise it returns the size of the mfdb.fd_addr as number
+ *         of bytes.
+ */
+int init_mfdb(int bpp, int w, int h, uint32_t flags, MFDB * out );
+
+/**
+ * Create a bitmap.
+ *
+ * \param  w  width of image in pixels
+ * \param  h  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 *atari_bitmap_create(int w, int h, unsigned int state);
+
+/**
+ * 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 atari_bitmap_get_rowstride(void *bitmap);
+
+/**
+ * Free a bitmap.
+ *
+ * \param  bitmap a bitmap, as returned by bitmap_create()
+ */
+void atari_bitmap_destroy(void *bitmap);
+
+/**
+ * Get bitmap width
+ *
+ * \param  bitmap a bitmap, as returned by bitmap_create()
+ */
+int atari_bitmap_get_width(void *bitmap);
+
+/**
+ * Get bitmap height
+ *
+ * \param  bitmap a bitmap, as returned by bitmap_create()
+ */
+int atari_bitmap_get_height(void *bitmap);
+
+/**
+ * Gets whether a bitmap should be plotted opaque
+ *
+ * \param  bitmap  a bitmap, as returned by bitmap_create()
+ */
+bool atari_bitmap_get_opaque(void *bitmap);
+
+size_t atari_bitmap_buffer_size(void *bitmap);
+
+bool atari_bitmap_resize(struct bitmap *img, HermesHandle hermes_h, HermesFormat *fmt, int nw, int nh);
+
+void *atari_bitmap_realloc( int w, int h, short bpp, int rowstride, unsigned int state, void * bmp );
+
+#endif