created libwinnie (library), winnie (the server application) and clients

[winnie] / libwinnie / src / sdl / gfx.cc

diff --git a/libwinnie/src/sdl/gfx.cc b/libwinnie/src/sdl/gfx.cc
new file mode 100644 (file)
index 0000000..7e098b9
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+++ b/libwinnie/src/sdl/gfx.cc
@@ -0,0 +1,162 @@
+/*
+winnie - an experimental window system
+
+Copyright (C) 2013 Eleni Maria Stea
+
+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 3 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, see <http://www.gnu.org/licenses/>.
+
+Author: Eleni Maria Stea <elene.mst@gmail.com>
+*/
+
+#ifdef WINNIE_SDL
+#include <stdio.h>
+#include <stdlib.h>
+#include <SDL/SDL.h>
+
+#include "gfx.h"
+#include "shalloc.h"
+#include "winnie.h"
+
+static SDL_Surface *fbsurf;
+
+struct Graphics {
+       Rect screen_rect;
+       Rect clipping_rect;
+       int color_depth; // bits per pixel
+       Pixmap *pixmap;
+};
+
+static Graphics *gfx;
+
+bool init_gfx()
+{
+       if(SDL_Init(SDL_INIT_VIDEO) == -1) {
+               fprintf(stderr, "failed to initialize SDL\n");
+               return false;
+       }
+
+       if(!(gfx = (Graphics*)sh_malloc(sizeof *gfx))) {
+               return false;
+       }
+
+       get_subsys()->graphics_offset = (int)((char*)gfx - (char*)get_pool());
+
+       Rect scr_rect(0, 0, 1024, 768);
+       gfx->screen_rect = scr_rect;
+       gfx->color_depth = 32;
+
+       if(!(fbsurf = SDL_SetVideoMode(gfx->screen_rect.width, gfx->screen_rect.height, gfx->color_depth, 0))) {
+               fprintf(stderr, "Failed to set video mode\n");
+               return false;
+       }
+       SDL_ShowCursor(0);
+
+       if(!(gfx->pixmap = (Pixmap*)sh_malloc(sizeof(Pixmap)))) {
+               fprintf(stderr, "Failed to allocate pixmap.\n");
+               return false;
+       }
+
+       gfx->pixmap->width = gfx->screen_rect.width;
+       gfx->pixmap->height = gfx->screen_rect.height;
+
+       int fbsize = gfx->pixmap->width * gfx->pixmap->height * gfx->color_depth / 8;
+       if(!(gfx->pixmap->pixels = (unsigned char*)sh_malloc(fbsize))) {
+               fprintf(stderr, "failed to allocate the pixmap framebuffer.\n");
+               return false;
+       }
+
+       set_clipping_rect(gfx->screen_rect);
+
+       return true;
+}
+
+void destroy_gfx()
+{
+       sh_free(gfx->pixmap->pixels);
+       gfx->pixmap->pixels = 0;
+       sh_free(gfx->pixmap);
+       sh_free(gfx);
+       SDL_Quit();
+}
+
+unsigned char *get_framebuffer()
+{
+       return gfx->pixmap->pixels;
+}
+
+Pixmap *get_framebuffer_pixmap()
+{
+       return gfx->pixmap;
+}
+
+Rect get_screen_size()
+{
+       return gfx->screen_rect;
+}
+
+int get_color_depth()
+{
+       return gfx->color_depth;
+}
+
+void set_clipping_rect(const Rect &rect)
+{
+       gfx->clipping_rect = rect_intersection(rect, get_screen_size());
+}
+
+const Rect &get_clipping_rect()
+{
+       return gfx->clipping_rect;
+}
+
+
+void set_cursor_visibility(bool visible)
+{
+}
+
+void gfx_update(const Rect &upd_rect)
+{
+       if(SDL_MUSTLOCK(fbsurf)) {
+               SDL_LockSurface(fbsurf);
+       }
+
+       Rect rect = rect_intersection(upd_rect, gfx->screen_rect);
+
+       unsigned char *sptr = gfx->pixmap->pixels + (rect.y * gfx->screen_rect.width + rect.x) * 4;
+       unsigned char *dptr = (unsigned char*)fbsurf->pixels + (rect.y * gfx->screen_rect.width + rect.x) * 4;
+
+       for(int i=0; i<rect.height; i++) {
+               memcpy(dptr, sptr, rect.width * 4);
+               sptr += gfx->screen_rect.width * 4;
+               dptr += gfx->screen_rect.width * 4;
+       }
+
+       if(SDL_MUSTLOCK(fbsurf)) {
+               SDL_UnlockSurface(fbsurf);
+       }
+       SDL_UpdateRect(fbsurf, rect.x, rect.y, rect.width, rect.height);
+}
+
+void wait_vsync()
+{
+}
+
+void get_rgb_order(int *r, int *g, int *b)
+{
+       *r = fbsurf->format->Rshift / 8;
+       *g = fbsurf->format->Gshift / 8;
+       *b = fbsurf->format->Bshift / 8;
+}
+
+#endif // WINNIE_SDL