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/*
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 <stdint.h>
#include "sdl/gfx.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 | SDL_INIT_TIMER) == -1) {
fprintf(stderr, "failed to initialize SDL\n");
return false;
}
if(!(gfx = (Graphics*)malloc(sizeof *gfx))) {
return false;
}
get_subsys()->graphics_offset = (intptr_t)(gfx);
Rect scr_rect(0, 0, 1280, 853);
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*)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*)malloc(fbsize))) {
fprintf(stderr, "failed to allocate the pixmap framebuffer.\n");
return false;
}
set_clipping_rect(gfx->screen_rect);
return true;
}
void destroy_gfx()
{
free(gfx->pixmap->pixels);
gfx->pixmap->pixels = 0;
free(gfx->pixmap);
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
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