--- /dev/null
+/*
+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_FBDEV
+#include <errno.h>
+#include <limits.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <fcntl.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/time.h>
+#include <unistd.h>
+
+#include <linux/fb.h>
+
+#include "gfx.h"
+#include "shalloc.h"
+#include "winnie.h"
+
+#define FRAMEBUFFER_SIZE(xsz, ysz, bpp) ((xsz) * (ysz) * (bpp) / CHAR_BIT)
+
+static unsigned char *framebuffer;
+static int dev_fd;
+static int rgb_order[3];
+
+struct Graphics {
+ Rect screen_rect;
+ Rect clipping_rect;
+ int color_depth;
+ Pixmap *pixmap;
+};
+
+static Graphics *gfx;
+
+bool init_gfx()
+{
+ if(!(gfx = (Graphics*)sh_malloc(sizeof *gfx))) {
+ return false;
+ }
+
+ get_subsys()->graphics_offset = (int)((char*)gfx - (char*)get_pool());
+
+ dev_fd = -1;
+
+ if((dev_fd = open("/dev/fb0", O_RDWR)) == -1) {
+ fprintf(stderr, "Cannot open /dev/fb0 : %s\n", strerror(errno));
+ return false;
+ }
+
+ fb_var_screeninfo sinfo;
+ if(ioctl(dev_fd, FBIOGET_VSCREENINFO, &sinfo) == -1) {
+ close(dev_fd);
+ dev_fd = -1;
+ fprintf(stderr, "Unable to get screen info : %s\n", strerror(errno));
+ return false;
+ }
+
+ printf("width : %d height : %d\n : bpp : %d\n", sinfo.xres, sinfo.yres, sinfo.bits_per_pixel);
+ printf("virtual w: %d virtual h: %d\n", sinfo.xres_virtual, sinfo.yres_virtual);
+
+ gfx->screen_rect.x = gfx->screen_rect.y = 0;
+ gfx->screen_rect.width = sinfo.xres_virtual;
+ gfx->screen_rect.height = sinfo.yres_virtual;
+ gfx->color_depth = sinfo.bits_per_pixel;
+
+ rgb_order[0] = sinfo.red.offset / 8;
+ rgb_order[1] = sinfo.green.offset / 8;
+ rgb_order[2] = sinfo.blue.offset / 8;
+
+ set_clipping_rect(gfx->screen_rect);
+
+ int sz = FRAMEBUFFER_SIZE(gfx->screen_rect.width, gfx->screen_rect.height, gfx->color_depth);
+ framebuffer = (unsigned char*)mmap(0, sz, PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, 0);
+
+ if(framebuffer == (void*)-1) {
+ close(dev_fd);
+ dev_fd = -1;
+ fprintf(stderr, "Cannot map the framebuffer to memory : %s\n", strerror(errno));
+ return false;
+ }
+
+// TODO: uncomment when I find how to use intelfb instead of i915 GRRRR.-
+ fb_vblank vblank;
+ if(ioctl(dev_fd, FBIOGET_VBLANK, &vblank) == -1) {
+// fprintf(stderr, "FBIOGET_VBLANK error: %s\n", strerror(errno));
+ }
+/*
+ else {
+ printf("flags: %x\n", vblank.flags);
+ printf("count: %d\n", vblank.count);
+ printf("beam position: %d, %d\n", vblank.hcount, vblank.vcount);
+ }
+*/
+
+ 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;
+ }
+
+ return true;
+}
+
+void destroy_gfx()
+{
+ clear_screen(0, 0, 0);
+ gfx_update(gfx->screen_rect);
+
+ if(dev_fd != -1) {
+ close(dev_fd);
+ }
+
+ dev_fd = -1;
+
+ munmap(framebuffer, FRAMEBUFFER_SIZE(gfx->screen_rect.width, gfx->screen_rect.height, gfx->color_depth));
+ framebuffer = 0;
+
+ sh_free(gfx->pixmap->pixels);
+ gfx->pixmap->pixels = 0;
+ sh_free(gfx->pixmap);
+ sh_free(gfx);
+}
+
+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)
+{
+ fb_cursor curs;
+ curs.enable = visible ? 1 : 0;
+
+ if(ioctl(dev_fd, FBIO_CURSOR, &curs) == -1) {
+ fprintf(stderr, "Cannot toggle cursor visibility : %s\n", strerror(errno));
+ }
+}
+
+void gfx_update(const Rect &upd_rect)
+{
+ 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 = framebuffer + (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;
+ }
+}
+
+void wait_vsync()
+{
+ unsigned long arg = 0;
+ if(ioctl(dev_fd, FBIO_WAITFORVSYNC, &arg) == -1) {
+// printf("ioctl error %s\n", strerror(errno));
+ }
+}
+
+void get_rgb_order(int *r, int *g, int *b)
+{
+ *r = rgb_order[0];
+ *g = rgb_order[1];
+ *b = rgb_order[2];
+}
+
+#endif // WINNIE_FBDEV
projects / winnie / blobdiff