#include <linux/fb.h>
#include "gfx.h"
+#include "shalloc.h"
#define FRAMEBUFFER_SIZE(xsz, ysz, bpp) ((xsz) * (ysz) * (bpp) / CHAR_BIT)
+static unsigned char *framebuffer;
+static int dev_fd;
+
struct Graphics {
- unsigned char *framebuffer;
- int dev_fd;
Rect screen_rect;
Rect clipping_rect;
int color_depth;
bool init_gfx()
{
- if(!(gfx = (Graphics*)malloc(sizeof *gfx))) {
+ if(!(gfx = (Graphics*)sh_malloc(sizeof *gfx))) {
return false;
}
- gfx->dev_fd = -1;
+ dev_fd = -1;
- if((gfx->dev_fd = open("/dev/fb0", O_RDWR)) == -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(gfx->dev_fd, FBIOGET_VSCREENINFO, &sinfo) == -1) {
- close(gfx->dev_fd);
- gfx->dev_fd = -1;
+ 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;
}
set_clipping_rect(gfx->screen_rect);
int sz = FRAMEBUFFER_SIZE(gfx->screen_rect.width, gfx->screen_rect.height, gfx->color_depth);
- gfx->framebuffer = (unsigned char*)mmap(0, sz, PROT_READ | PROT_WRITE, MAP_SHARED, gfx->dev_fd, 0);
+ framebuffer = (unsigned char*)mmap(0, sz, PROT_READ | PROT_WRITE, MAP_SHARED, dev_fd, 0);
- if(gfx->framebuffer == (void*)-1) {
- close(gfx->dev_fd);
- gfx->dev_fd = -1;
+ 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(gfx->dev_fd, FBIOGET_VBLANK, &vblank) == -1) {
+ if(ioctl(dev_fd, FBIOGET_VBLANK, &vblank) == -1) {
// fprintf(stderr, "FBIOGET_VBLANK error: %s\n", strerror(errno));
}
/*
}
*/
- gfx->pixmap = new Pixmap;
+ 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;
- gfx->pixmap->pixels = gfx->framebuffer;
+
+ 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;
}
{
clear_screen(0, 0, 0);
- if(gfx->dev_fd != -1) {
- close(gfx->dev_fd);
+ if(dev_fd != -1) {
+ close(dev_fd);
}
- gfx->dev_fd = -1;
+ dev_fd = -1;
- munmap(gfx->framebuffer, FRAMEBUFFER_SIZE(gfx->screen_rect.width, gfx->screen_rect.height, gfx->color_depth));
- gfx->framebuffer = 0;
+ 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;
-
- free(gfx);
+ sh_free(gfx->pixmap);
+ sh_free(gfx);
}
unsigned char *get_framebuffer()
{
- return gfx->framebuffer;
+ return gfx->pixmap->pixels;
}
Pixmap *get_framebuffer_pixmap()
fb_cursor curs;
curs.enable = visible ? 1 : 0;
- if(ioctl(gfx->dev_fd, FBIO_CURSOR, &curs) == -1) {
+ if(ioctl(dev_fd, FBIO_CURSOR, &curs) == -1) {
fprintf(stderr, "Cannot toggle cursor visibility : %s\n", strerror(errno));
}
}
void gfx_update()
{
+ memcpy(framebuffer, gfx->pixmap->pixels, gfx->pixmap->width * gfx->pixmap->height * (gfx->color_depth / 8));
}
void wait_vsync()
{
unsigned long arg = 0;
- if(ioctl(gfx->dev_fd, FBIO_WAITFORVSYNC, &arg) == -1) {
+ if(ioctl(dev_fd, FBIO_WAITFORVSYNC, &arg) == -1) {
// printf("ioctl error %s\n", strerror(errno));
}
}