1 files changed, 62 insertions, 0 deletions
diff --git a/src/libs/graphics/sdl/primitives.h b/src/libs/graphics/sdl/primitives.h
new file mode 100644
index 0000000..9d8aff2
--- /dev/null
+++ b/src/libs/graphics/sdl/primitives.h
@@ -0,0 +1,62 @@
+//Copyright Paul Reiche, Fred Ford. 1992-2002
+
+/*
+ *  This program 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; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ */
+
+#ifndef PRIMITIVES_H
+#define PRIMITIVES_H
+
+/* Function types for the pixel functions */
+
+typedef Uint32 (*GetPixelFn)(SDL_Surface *, int x, int y);
+// 'pixel' is in destination surface format
+typedef void (*PutPixelFn)(SDL_Surface *, int x, int y, Uint32 pixel);
+
+GetPixelFn getpixel_for(SDL_Surface *surface);
+PutPixelFn putpixel_for(SDL_Surface *surface);
+
+// This currently matches gfxlib.h:DrawKind for simplicity
+typedef enum
+{
+	renderReplace = 0,
+	renderAdditive,
+	renderAlpha,
+} RenderKind;
+
+#define FULLY_OPAQUE_ALPHA  255
+#define ADDITIVE_FACTOR_1   255
+
+// 'pixel' is in destination surface format
+// See gfxlib.h:DrawKind for 'factor' spec
+typedef void (*RenderPixelFn)(SDL_Surface *, int x, int y, Uint32 pixel,
+		int factor);
+
+RenderPixelFn renderpixel_for(SDL_Surface *surface, RenderKind);
+
+void line_prim(int x1, int y1, int x2, int y2, Uint32 color,
+		RenderPixelFn plot, int factor, SDL_Surface *dst);
+void fillrect_prim(SDL_Rect r, Uint32 color,
+		RenderPixelFn plot, int factor, SDL_Surface *dst);
+void blt_prim(SDL_Surface *src, SDL_Rect src_r,
+		RenderPixelFn plot, int factor,
+		SDL_Surface *dst, SDL_Rect dst_r);
+
+int clip_line(int *lx1, int *ly1, int *lx2, int *ly2, const SDL_Rect *clip_r);
+int clip_rect(SDL_Rect *r, const SDL_Rect *clip_r);
+int clip_blt_rects(SDL_Rect *src_r, SDL_Rect *dst_r, const SDL_Rect *clip_r);
+
+
+#endif /* PRIMITIVES_H */