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sdl.cpp
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sdl.cpp
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#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>
#include "image.h"
#include "types.h"
#include "memory.h"
#include "sdl.h"
#ifdef __GNUC__
#include <iostream>
using namespace std;
/* mode, width, height, bytes_per_line, base_addr, bpp, Bpp, colors, vsync_reg, scale */
const adapter::video_mode sdl::video_modes[] = {
{VGALO ,320 ,200 ,320 ,0,1,8,0xFF,0,2},
{PI3X2 ,480 ,320 ,480 ,0,1,8,0xFF,0,1},
{PITOUCH,800 ,480 ,800 ,0,1,8,0xFF,0,1},
{VGAHI ,640 ,480 ,640 ,0,1,8,0xFF,0,1},
{SVGA ,800 ,600 ,800 ,0,1,8,0xFF,0,1},
{XGA ,1024 ,768 ,1024 ,0,1,8,0xFF,0,1},
{HD ,1280 ,720 ,1280 ,0,1,8,0xFF,0,1},
{FHD ,1920 ,1080 ,1920 ,0,1,8,0xFF,0,1},
{X16 ,160 ,100 ,160 ,0,1,8,0x0F,0,4}
};
bool sdl::SDLonce = false;
sdl::sdl(void)
{
_window=NULL;
_renderer=NULL;
_render=NULL;
_texture=NULL;
_sdlscale=0;
_screen=NULL;
if (!SDLonce) {
SDLonce=true;
SDL_Init(SDL_INIT_VIDEO|SDL_INIT_EVENTS);
}
}
sdl::~sdl(void)
{
if (_cur_palette == palette::CUSTOM && _palette) delete _palette;
if (SDLonce) {
if (_render) SDL_FreeSurface(_render);
if (_screen) SDL_FreeSurface(_screen);
if (_texture) SDL_DestroyTexture(_texture);
SDL_DestroyWindow( _window );
SDL_Quit();
}
}
bool sdl::setup(void)
{
for (unsigned long int i=0;i<sizeof(video_modes);i++) {
if (video_modes[i].mode == _vmode) {
_row_bytes = video_modes[i].bytes;
_width = video_modes[i].x;
_height = video_modes[i].y;
bpp = video_modes[i].bpp;
Bpp = bpp/8;
planes = video_modes[i].planes;
colors = video_modes[i].colors;
SR = video_modes[i].sr;
buf_size = _row_bytes*_height;
_sdlscale = video_modes[i].scale;
_render = SDL_CreateRGBSurface(0,_width,_height,8,0,0,0,0);
screen = canvas(_width,_height,(ptr_t)_render->pixels);
return true;
}
}
return false;
}
bool sdl::setpalette(palette::pal_type pal)
{
if (!adapter::setpalette(pal)) return false;
SDL_Palette* sdl_palette = SDL_AllocPalette(_palette_size);
for(int i=0;i<_palette_size;i++) {
sdl_palette->colors[i].r=_palette[i].r;
sdl_palette->colors[i].g=_palette[i].g;
sdl_palette->colors[i].b=_palette[i].b;
}
SDL_SetSurfacePalette(_render,sdl_palette);
// SDL_SetSurfacePalette(_spritescreen,sdl_palette);
SDL_FreePalette(sdl_palette);
return true;
}
bool sdl::setpalette(palette::pal_t *pal, int palette_entries)
{
_palette_size=palette_entries;
_cur_palette=palette::CUSTOM;
_palette=new palette::pal_t[_palette_size];
if (_palette == NULL) return false;
memcpy(_palette,pal,sizeof(palette::pal_t)*_palette_size);
SDL_Palette* sdl_palette = SDL_AllocPalette(_palette_size);
for(int i=0;i<_palette_size;i++) {
sdl_palette->colors[i].r=_palette[i].r;
sdl_palette->colors[i].g=_palette[i].g;
sdl_palette->colors[i].b=_palette[i].b;
}
SDL_SetSurfacePalette(_render,sdl_palette);
// SDL_SetSurfacePalette(_spritescreen,sdl_palette);
SDL_FreePalette(sdl_palette);
return true;
}
bool sdl::sdlmode(Mode mode)
{
_vmode=mode;
setup();
_window = SDL_CreateWindow("VGALIB",SDL_WINDOWPOS_UNDEFINED,SDL_WINDOWPOS_UNDEFINED,_width*_sdlscale,_height*_sdlscale,SDL_WINDOW_SHOWN|SDL_WINDOW_RESIZABLE);
_renderer = SDL_CreateRenderer(_window, -1, SDL_RENDERER_ACCELERATED|SDL_RENDERER_PRESENTVSYNC);
SDL_SetHintWithPriority(SDL_HINT_RENDER_VSYNC, "1", SDL_HINT_OVERRIDE);
SDL_RenderClear(_renderer);
SDL_RenderSetLogicalSize(_renderer, _width, _height);
_texture = SDL_CreateTexture(_renderer,
SDL_PIXELFORMAT_ARGB8888,
SDL_TEXTUREACCESS_STREAMING,
_width, _height);
SDL_SetRenderTarget(_renderer, _texture);
_screen = SDL_CreateRGBSurface(0, _width, _height, 32, 0, 0, 0, 0);
return false;
}
bool sdl::graphmode(Mode mode)
{
switch (mode) {
case FHD:
case HD:
case XGA:
case SVGA:
case VGAHI:
case VGALO:
setpalette(palette::VGA_PAL);
return sdlmode(mode);
case X16:
setpalette(palette::TEXT_PAL);
return sdlmode(mode);
default:
return false;
}
}
adapter::Mode sdl::getmode(void)
{
return _vmode;
}
void sdl::cls(void)
{
screen.clear();
update();
}
void sdl::update(void)
{
translate(screen._buffer);
}
void sdl::translate(unsigned char far *src)
{
void *pixels;
int pitch;
SDL_BlitSurface(_render, NULL, _screen, NULL);
SDL_LockTexture(_texture, NULL, &pixels, &pitch);
SDL_ConvertPixels(_screen->w, _screen->h, _screen->format->format,
_screen->pixels, _screen->pitch, SDL_PIXELFORMAT_ARGB8888, pixels,
pitch);
SDL_UnlockTexture(_texture);
SDL_RenderCopy(_renderer, _texture, NULL, NULL);
SDL_RenderPresent(_renderer);
}
int sdl::kbhit(void)
{
if (SDL_PollEvent(&_event)) {
switch (_event.type) {
case SDL_QUIT:
case SDL_KEYDOWN:
std::cout<<"caught event "<<std::hex<<_event.type<<" keysym "<<_event.key.keysym.sym<<"("<<std::dec<<_event.key.keysym.sym<<")"<<std::endl;
return true;
break;
}
}
return false;
}
int sdl::getch(void)
{
while (SDL_WaitEvent(&_event)) {
/* an event was found */
switch (_event.type) {
/* close button clicked */
case SDL_QUIT:
return 0;
break;
/* handle the keyboard */
case SDL_KEYDOWN:
return _event.key.keysym.sym;
break;
}
}
return 0;
}
/*
* SDL routine for implementing input processing loop, since SDL needs to be called a lot of pump events
*/
int sdl::getEvents(int ms)
{
uint32_t start_time, sched_time;
start_time=SDL_GetTicks();
sched_time=start_time+ms;
do {
if (SDL_PollEvent(&_event)) {
// SDL_WaitEventTimeout(&_event,ms);
/* an event was found */
switch (_event.type) {
/* close button clicked */
case SDL_QUIT:
return -1;
break;
/* handle the keyboard */
case SDL_KEYDOWN:
return _event.key.keysym.sym;
break;
default:
// return 0;
break;
}
}
} while (SDL_GetTicks() < sched_time);
return 0;
}
#endif