From 3c61db33ffc94ee194dd0111a332762199334d37 Mon Sep 17 00:00:00 2001
From: Vincent Sanders <vince@kyllikki.org>
Date: Thu, 16 Apr 2015 15:56:48 +0100
Subject: Convert atari frontend to use bitmap operation table

---
 atari/bitmap.h | 119 +++++++++++++++++++++++++++++++++++++++++----------------
 1 file changed, 87 insertions(+), 32 deletions(-)

(limited to 'atari/bitmap.h')

diff --git a/atari/bitmap.h b/atari/bitmap.h
index ed8093835..b0fa18069 100755
--- a/atari/bitmap.h
+++ b/atari/bitmap.h
@@ -16,6 +16,11 @@
  * 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
 
@@ -24,33 +29,33 @@
 
 #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
+/* 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                     */
+#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)
-*/
+/**
+ * Calculates MFDB compatible rowstride (in number of bits)
+ */
 #define MFDB_STRIDE( w ) (((w & 15) != 0) ? (w | 15)+1 : w)
 
 
-/*
-Calculate size of an mfdb,
-
- params:
-
-        bpp:    Bits per pixel,
-        stride: Word aligned rowstride (width) as returned by MFDB_STRIDE,
-        h:              Height in pixels
+/**
+ * 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;
@@ -63,20 +68,70 @@ struct bitmap {
 	bool converted;
 };
 
-void * bitmap_create_ex( int w, int h, short bpp, int rowstride, unsigned int state, void * pixdata );
-void bitmap_to_mfdb(void * bitmap, MFDB * out);
-void * bitmap_realloc( int w, int h, short bpp, int rowstride, unsigned int state, void * bmp );
-size_t bitmap_buffer_size( void * bitmap ) ;
-bool bitmap_resize(struct bitmap * img, HermesHandle hermes_h,
-		HermesFormat *fmt, int nw, int nh);
-/*
-        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).
-        The function will return 0 when the memory allocation fails
-        ( out of memory), otherwise it returns the size of the mfdb.fd_addr
-  as number of bytes.
-*/
+
+
+/**
+ * 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
-- 
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