-#include <errno.h>
-#include <limits.h>
-#include <stdio.h>
#include <string.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <linux/fb.h>
-
+#include "geom.h"
#include "gfx.h"
-#define FRAMEBUFFER_SIZE(xsz, ysz, bpp) ((xsz) * (ysz) * (bpp) / CHAR_BIT)
-
-static unsigned char *framebuffer;
-static int dev_fd = -1;
-
-static Rect screen_rect;
-static int color_depth; //bits per pixel
-
-bool init_gfx()
-{
- 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);
-
- screen_rect.x = screen_rect.y = 0;
- screen_rect.width = sinfo.xres_virtual;
- screen_rect.height = sinfo.yres_virtual;
- color_depth = sinfo.bits_per_pixel;
-
- int sz = FRAMEBUFFER_SIZE(screen_rect.width, screen_rect.height, 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;
- }
-
- return true;
-}
-
-void destroy_gfx()
-{
- clear_screen(0, 0, 0);
-
- if(dev_fd != -1) {
- close(dev_fd);
- }
-
- dev_fd = -1;
-
- munmap(framebuffer, FRAMEBUFFER_SIZE(screen_rect.width, screen_rect.height, color_depth));
- framebuffer = 0;
-}
-
-unsigned char *get_framebuffer()
-{
- return framebuffer;
-}
-
-Rect get_screen_size()
-{
- return screen_rect;
-}
-
-int get_color_depth()
-{
- return color_depth;
-}
-
void clear_screen(int r, int g, int b)
{
+ Rect screen_rect = get_screen_size();
fill_rect(screen_rect, r, g, b);
}
void fill_rect(const Rect &rect, int r, int g, int b)
{
Rect drect = rect;
+ Rect screen_rect = get_screen_size();
+ Rect clipping_rect = get_clipping_rect();
- if(drect.x < 0) {
- drect.x = 0;
+ if(drect.x < clipping_rect.x) {
+ drect.width -= clipping_rect.x - drect.x;
+ drect.x = clipping_rect.x;
}
- if(drect.y < 0) {
- drect.y = 0;
+ if(drect.y < clipping_rect.y) {
+ drect.height -= clipping_rect.y - drect.y;
+ drect.y = clipping_rect.y;
}
- unsigned char *fb = framebuffer + (drect.x + screen_rect.width * drect.y) * 4;
+ if(drect.x + drect.width >= clipping_rect.x + clipping_rect.width) {
+ drect.width = clipping_rect.width + clipping_rect.x - drect.x;
+ }
+
+ if(drect.y + drect.height >= clipping_rect.y + clipping_rect.height) {
+ drect.height = clipping_rect.height + clipping_rect.y - drect.y;
+ }
+
+ unsigned char *fb = get_framebuffer() + (drect.x + screen_rect.width * drect.y) * 4;
for(int i=0; i<drect.height; i++) {
for(int j=0; j<drect.width; j++) {
fb[j * 4] = b;
}
}
-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 blit(unsigned char *src_img, const Rect &src_rect, unsigned char* dest_img,
const Rect &dest_rect, int dest_x, int dest_y)
{
+ Rect irect = rect_intersection(get_clipping_rect(), dest_rect);
+
int width = src_rect.width;
int height = src_rect.height;
- int xoffs = dest_x - dest_rect.x;
+ int xoffs = dest_x - irect.x;
if(xoffs < 0) {
- dest_x = dest_rect.x;
+ dest_x = irect.x;
width += xoffs;
}
- int yoffs = dest_y - dest_rect.y;
+ int yoffs = dest_y - irect.y;
if(yoffs < 0) {
- dest_y = dest_rect.y;
+ dest_y = irect.y;
height += yoffs;
}
int xend = dest_x + width;
- if(xend >= dest_rect.width) {
- width -= xend - dest_rect.width;
+ if(xend >= irect.width) {
+ width -= xend - irect.width;
}
int yend = dest_y + height;
- if(yend >= dest_rect.height) {
- height -= yend - dest_rect.height;
+ if(yend >= irect.height) {
+ height -= yend - irect.height;
}
if(width <= 0 || height <= 0) {
void blit_key(unsigned char *src_img, const Rect &src_rect, unsigned char* dest_img,
const Rect &dest_rect, int dest_x, int dest_y, int key_r, int key_g, int key_b)
{
+ Rect irect = rect_intersection(get_clipping_rect(), dest_rect);
+
int width = src_rect.width;
int height = src_rect.height;
- int xoffs = dest_x - dest_rect.x;
+ int xoffs = dest_x - irect.x;
if(xoffs < 0) {
- dest_x = dest_rect.x;
+ dest_x = irect.x;
width += xoffs;
}
- int yoffs = dest_y - dest_rect.y;
+ int yoffs = dest_y - irect.y;
if(yoffs < 0) {
- dest_y = dest_rect.y;
+ dest_y = irect.y;
height += yoffs;
}
int xend = dest_x + width;
- if(xend >= dest_rect.width) {
- width -= xend - dest_rect.width;
+ if(xend >= irect.width) {
+ width -= xend - irect.width;
}
int yend = dest_y + height;
- if(yend >= dest_rect.height) {
- height -= yend - dest_rect.height;
+ if(yend >= irect.height) {
+ height -= yend - irect.height;
}
if(width <= 0 || height <= 0) {
projects / winnie / blobdiff