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gates_of_skeldal/platform/sdl/sdl_context.cpp
Ondřej Novák 05a2803b2b Fix mouse lag on linux platform
2025-02-19 10:56:47 +01:00

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#include "sdl_context.h"
#include "keyboard_map.h"
#include <atomic>
#include <cassert>
#include "../platform.h"
#include <cmath>
#include <iostream>
#include <fstream>
#include <stdexcept>
#include <sstream>
#include <algorithm>
void SDLContext::SDL_Deleter::operator ()(SDL_Window* window) {
SDL_DestroyWindow(window);
}
void SDLContext::SDL_Deleter::operator ()(SDL_Renderer* renderer) {
SDL_DestroyRenderer(renderer);
}
void SDLContext::SDL_Deleter::operator ()(SDL_Surface* surface) {
SDL_FreeSurface(surface);
}
void SDLContext::SDL_Deleter::operator ()(SDL_Texture* texture) {
SDL_DestroyTexture(texture);
}
void SDLContext::SDL_Audio_Deleter::operator()(SDL_AudioDeviceID x) {
SDL_CloseAudioDevice(x);
}
struct SDL_INIT_Context {
SDL_INIT_Context() {
if (SDL_Init(SDL_INIT_VIDEO|SDL_INIT_TIMER|SDL_INIT_AUDIO) < 0) {
SDL_Log("Unable to initialize SDL: %s", SDL_GetError());
exit(1);
}
inited = true;
}
~SDL_INIT_Context() {
SDL_Quit();
}
bool inited = false;
};
static SDL_INIT_Context init_context = {};
SDLContext::SDLContext() {
if (!init_context.inited) throw std::runtime_error("SDL not inited");
}
void SDLContext::generateCRTTexture(SDL_Renderer* renderer, SDL_Texture** texture, int width, int height, CrtFilterType type) {
if (type == CrtFilterType::autoselect) {
if (height > 1680) type = CrtFilterType::rgb_matrix_3;
else if (height >= 1200) type = CrtFilterType::scanlines_2;
else type = CrtFilterType::scanlines;
}
if (type == CrtFilterType::scanlines || type == CrtFilterType::scanlines_2) {
width = 32;
}
// Vytvoř novou texturu ve správné velikosti
*texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_RGBA8888, SDL_TEXTUREACCESS_STREAMING, width, height);
SDL_SetTextureBlendMode(*texture, SDL_BLENDMODE_MUL);
// Zamkni texturu pro přímý přístup k pixelům
void* pixels;
int pitch;
SDL_LockTexture(*texture, nullptr, &pixels, &pitch);
Uint32* pixelArray = (Uint32*)pixels;
if (type == CrtFilterType::scanlines) {
Uint32 darkPixel = 0xA0A0A0FF;
Uint32 transparentPixel = 0xFFFFFFC0;
for (int y = 0; y < height; y++) {
Uint32 color = ((y & 1)== 0) ? darkPixel : transparentPixel;
for (int x = 0; x < width; x++) {
pixelArray[y * (pitch / 4) + x] = color;
}
}
}
else if (type == CrtFilterType::scanlines_2) {
Uint32 darkPixel = 0x808080FF;
Uint32 transparentPixel = 0xFFFFFFE0;
for (int y = 0; y < height; y++) {
Uint32 color = (y % 3== 2) ? darkPixel : transparentPixel;
for (int x = 0; x < width; x++) {
pixelArray[y * (pitch / 4) + x] = color;
}
}
} else {
static Uint32 red_pixel = 0xFF8080A0;
static Uint32 green_pixel = 0x80FF80A0;
static Uint32 blue_pixel = 0x8080FFA0;
static Uint32 dark_pixel = 0x000000C0;
for (int y = 2; y < height; y++) {
if (type == CrtFilterType::rgb_matrix_2) {
for (int x = 2; x < width; x+=3) {
Uint32 *pos = pixelArray+y*(pitch/4)+x-2;
if ((y % 3) == 2) {
pos[0] = pos[1] = pos[2] = dark_pixel;
} else {
pos[0] = red_pixel;
pos[1] = green_pixel;
pos[2] = blue_pixel;
}
}
} else {
for (int x = 2; x < width; x+=3) {
Uint32 *pos = pixelArray+y*(pitch/4)+x-2;
if ((y & 3) == 3) {
pos[0] = pos[1] = pos[2] = dark_pixel;
} else {
pos[0] = red_pixel;
pos[1] = green_pixel;
pos[2] = blue_pixel;
}
}
}
}
}
// Odemkni texturu
SDL_UnlockTexture(*texture);
}
void SDLContext::init_video(const VideoConfig &config, const char *title) {
char buff[256];
static Uint32 update_request_event = SDL_RegisterEvents(1);
_update_request_event = update_request_event;
assert(!_render_thread.joinable());
int width = config.window_width;
int height = config.window_height;
aspect_x = config.aspect_x;
aspect_y = config.aspect_y;
_crt_filter = config.crt_filter ;
if (_crt_filter == CrtFilterType::none) {
_crt_filter = CrtFilterType::autoselect;
_enable_crt = false;
}
_fullscreen_mode = config.fullscreen;
std::atomic<bool> done = false;
std::exception_ptr e;
_render_thread = std::jthread([&](std::stop_token stp){
bool err = false;
try {
SDL_Window *window = SDL_CreateWindow(title,
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
width, height, SDL_WINDOW_RESIZABLE|(_fullscreen_mode?SDL_WINDOW_FULLSCREEN_DESKTOP:0));
if (!window) {
snprintf(buff, sizeof(buff), "SDL Error create window: %s\n", SDL_GetError());
throw std::runtime_error(buff);
}
_window.reset(window);
SDL_Renderer *renderer = SDL_CreateRenderer(_window.get(), -1, config.composer);
if (!renderer) {
snprintf(buff,sizeof(buff), "Failed to create composer: %s\n", SDL_GetError());
throw std::runtime_error(buff);
}
SDL_RendererInfo rinfo;
SDL_GetRendererInfo(renderer, &rinfo);
if (istrcmp(config.scale_quality, "auto") == 0) {
if (rinfo.flags & SDL_RENDERER_ACCELERATED) {
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "best");
}
} else {
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, config.scale_quality);
}
_renderer.reset(renderer);
SDL_Texture *texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB1555, SDL_TEXTUREACCESS_STREAMING, 640, 480);
if (!texture) {
snprintf(buff, sizeof(buff), "Chyba při vytváření textury: %s\n", SDL_GetError());
throw std::runtime_error(buff);
}
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
_texture.reset(texture);
texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ARGB1555, SDL_TEXTUREACCESS_STREAMING, 640, 480);
if (!texture) {
snprintf(buff, sizeof(buff), "Chyba při vytváření textury: %s\n", SDL_GetError());
throw std::runtime_error(buff);
}
SDL_SetTextureBlendMode(texture, SDL_BLENDMODE_BLEND);
_texture2.reset(texture);
_visible_texture = _texture.get();
_hidden_texture = _texture2.get();
} catch (...) {
e = std::current_exception();
err = true;
}
done = true;
done.notify_all();
SDL_ShowCursor(SDL_DISABLE);
if (!err) event_loop(stp);
_texture.reset();
_texture2.reset();
_renderer.reset();
_window.reset();
});
done.wait(false);
if (e) {
_render_thread.join();
std::rethrow_exception(e);
}
}
void SDLContext::close_video() {
_render_thread.request_stop();
_render_thread.join();
}
void SDLContext::event_loop(std::stop_token stp) {
static Uint32 exit_loop_event = SDL_RegisterEvents(1);
std::stop_callback stopcb(stp,[&]{
SDL_Event event;
event.type = exit_loop_event;
SDL_PushEvent(&event);
});
SDL_Event e;
while (SDL_WaitEvent(&e)) {
if (e.type == SDL_QUIT) {
_quit_requested = true;
if (_quit_callback) _quit_callback();
} else if (e.type == exit_loop_event) {
break;
} else if (e.type == _update_request_event) {
update_screen();
} else if (e.type == SDL_WINDOWEVENT) {
if (e.window.event == SDL_WINDOWEVENT_SIZE_CHANGED) {
_crt_effect.reset();
}
} else if (e.type == SDL_KEYDOWN || e.type == SDL_KEYUP) {
_key_capslock = e.key.keysym.mod & KMOD_CAPS;
_key_shift =e.key.keysym.mod & KMOD_SHIFT;
_key_control =e.key.keysym.mod & KMOD_CTRL;
if (e.type == SDL_KEYDOWN) {
if (e.key.keysym.sym == SDLK_RETURN && (e.key.keysym.mod & KMOD_ALT)) {
_fullscreen_mode = !_fullscreen_mode;
SDL_SetWindowFullscreen(_window.get(), _fullscreen_mode ? SDL_WINDOW_FULLSCREEN_DESKTOP : 0);
} else {
auto code =sdl_keycode_map.get_bios_code(e.key.keysym.scancode,
e.key.keysym.mod & KMOD_SHIFT, e.key.keysym.mod & KMOD_CTRL);
if (code) {
std::lock_guard _(_mx);
_keyboard_queue.push(code);
}
}
}
} else if (e.type == SDL_MOUSEMOTION) {
SDL_Event temp;
while (SDL_PeepEvents(&temp, 1, SDL_GETEVENT, SDL_MOUSEMOTION, SDL_MOUSEMOTION)) {
e= temp;
}
SDL_Point mspt(e.motion.x, e.motion.y);
SDL_Rect winrc = get_window_aspect_rect();
SDL_Point srcpt = to_source_point(winrc, mspt);
ms_event.event = 1;
ms_event.event_type |= 1;
ms_event.x = srcpt.x;
ms_event.y = srcpt.y;
if (_mouse) {
_mouse_rect.x = e.motion.x;
_mouse_rect.y = e.motion.y;
bool do_update = false;
{
std::lock_guard _(_mx);
do_update = _display_update_queue.empty();
}
if (do_update) {
refresh_screen();
}
}
} else if (e.type == SDL_MOUSEBUTTONDOWN || e.type == SDL_MOUSEBUTTONUP) {
int button = e.button.button;
int up = e.type == SDL_MOUSEBUTTONUP?1:0;
ms_event.event = 1;
int shift = 0;
switch (button) {
default: break;
case 1: ms_event.tl1 = !up; shift = 1; break;
case 2: ms_event.tl3 = !up; shift = 5; break;
case 3: ms_event.tl2 = !up; shift = 3; break;
}
ms_event.event_type |= (1<<(shift+up));
}
}
}
void SDLContext::present_rect(uint16_t *pixels, unsigned int pitch,
unsigned int x, unsigned int y, unsigned int xs, unsigned ys) {
auto beg = pixels + y * pitch + x;
SDL_Rect r = {static_cast<int>(x),
static_cast<int>(y),
static_cast<int>(xs),
static_cast<int>(ys)};
std::lock_guard _(_mx);
signal_push();
push_update_msg(r, beg, pitch);
}
std::uint16_t SDLContext::pop_keyboard_code() {
std::lock_guard _(_mx);
std::uint16_t out = _keyboard_queue.front();
_keyboard_queue.pop();
return out;
}
bool SDLContext::is_keyboard_ready() const {
std::lock_guard _(_mx);
return !_keyboard_queue.empty();
}
void SDLContext::show_slide_transition(const SDL_Rect &visible_from,
const SDL_Rect &visible_where, const SDL_Rect &hidden_from,
const SDL_Rect &hidden_where) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::slide_transition);
push_item(SlideTransitionReq{visible_from, visible_where,hidden_from, hidden_where});
}
void SDLContext::signal_push() {
if (_display_update_queue.empty()) {
SDL_Event event;
event.type = _update_request_event;
SDL_PushEvent(&event);
}
}
void SDLContext::refresh_screen() {
SDL_Rect winrc = get_window_aspect_rect();
SDL_RenderClear(_renderer.get());
if (slide_transition) {
SDL_SetTextureAlphaMod(_hidden_texture, 255);
SDL_SetTextureAlphaMod(_visible_texture, 255);
SDL_RenderCopy(_renderer.get(), _hidden_texture, NULL, &winrc);
SDL_Rect visible_where_win = to_window_rect(winrc, slide_transition->visible_where);
SDL_Rect hidden_where_win = to_window_rect(winrc, slide_transition->hidden_where);
SDL_RenderCopy(_renderer.get(), _visible_texture, &slide_transition->visible_from, &visible_where_win);
SDL_RenderCopy(_renderer.get(), _hidden_texture, &slide_transition->hidden_from, &hidden_where_win);
}
else if (blend_transition) {
SDL_SetTextureAlphaMod(_hidden_texture, 255);
SDL_RenderCopy(_renderer.get(), _hidden_texture, NULL, &winrc);
if (blend_transition->phase >= 0) {
float f = blend_transition->phase;
SDL_SetTextureAlphaMod(_visible_texture, 255);
SDL_Rect wrkarea = to_window_rect(winrc, blend_transition->wrkarea);
SDL_Rect src1 = transition_rect(blend_transition->prev, blend_transition->next, f);
SDL_RenderCopy(_renderer.get(), _visible_texture, &src1, &wrkarea);
if (SDL_SetTextureAlphaMod(_hidden_texture, (uint8_t)(255.0f*(f)))!= -1) {
SDL_Rect trgnxt = to_window_rect(winrc, blend_transition->next);
SDL_Rect trgwin = transition_rect(trgnxt, wrkarea, f);
SDL_RenderCopy(_renderer.get(), _hidden_texture, &blend_transition->wrkarea, &trgwin);
}
} else {
float f = blend_transition->phase;
SDL_Rect wrkarea = to_window_rect(winrc, blend_transition->wrkarea);
SDL_Rect src1 = transition_rect(blend_transition->prev, blend_transition->next, 1+f);
SDL_RenderCopy(_renderer.get(), _hidden_texture, &src1, &wrkarea);
if (SDL_SetTextureAlphaMod(_visible_texture, (uint8_t)(255.0f*(1+f))) != -1) {
SDL_Rect trgnxt = to_window_rect(winrc, blend_transition->next);
SDL_Rect trgwin = transition_rect(trgnxt, wrkarea, 1+f);
SDL_RenderCopy(_renderer.get(), _visible_texture, &blend_transition->wrkarea, &trgwin);
}
}
} else {
SDL_SetTextureAlphaMod(_visible_texture, 255);
SDL_RenderCopy(_renderer.get(), _visible_texture, NULL, &winrc);
}
for (const auto &sprite: _sprites) if (sprite.shown) {
SDL_Rect rc = to_window_rect(winrc,sprite._rect);
SDL_RenderCopy(_renderer.get(), sprite._txtr.get(), NULL, &rc);
}
if (_mouse) {
SDL_Rect recalc_rect = to_window_rect(winrc, _mouse_rect);
SDL_Point f= to_window_point({0,0,winrc.w, winrc.h}, _mouse_finger);
recalc_rect.x = _mouse_rect.x - f.x;
recalc_rect.y = _mouse_rect.y - f.y;
SDL_RenderCopy(_renderer.get(), _mouse.get(), NULL, &recalc_rect);
}
if (winrc.h >= 720 && _crt_filter != CrtFilterType::none && _enable_crt) {
if (!_crt_effect) {
SDL_Texture *txt;
generateCRTTexture(_renderer.get(), &txt, winrc.w, winrc.h, _crt_filter);
_crt_effect.reset(txt);
}
SDL_RenderCopy(_renderer.get(), _crt_effect.get(), NULL, &winrc);
}
SDL_RenderPresent(_renderer.get());
}
void SDLContext::update_screen() {
{
std::lock_guard _(_mx);
if (_display_update_queue.empty()) return;
QueueIter iter = _display_update_queue.data();
QueueIter end = iter + _display_update_queue.size();
while (iter != end) {
DisplayRequest req;
pop_item(iter, req);
switch (req) {
case DisplayRequest::update: {
SDL_Rect r;
pop_item(iter, r);
std::string_view data = pop_data(iter, r.w*r.h*2);
SDL_UpdateTexture(_texture.get(), &r, data.data(), r.w*2);
}
break;
case DisplayRequest::show_mouse_cursor: {
SDL_Rect r;
pop_item(iter, r);
std::string_view data = pop_data(iter, r.w*r.h*2);
_mouse.reset(SDL_CreateTexture(_renderer.get(), SDL_PIXELFORMAT_ARGB1555,SDL_TEXTUREACCESS_STATIC, r.w, r.h));
SDL_SetTextureBlendMode(_mouse.get(), SDL_BLENDMODE_BLEND);
_mouse_rect.w = r.w;
_mouse_rect.h = r.h;
SDL_UpdateTexture(_mouse.get(), NULL, data.data(), r.w*2);
}
break;
case DisplayRequest::hide_mouse_cursor: {
_mouse.reset();
}
break;
case DisplayRequest::swap_render_buffers: {
std::swap(_texture,_texture2);
}
break;
case DisplayRequest::swap_visible_buffers: {
std::swap(_visible_texture,_hidden_texture);
blend_transition.reset();
slide_transition.reset();
}
break;
case DisplayRequest::blend_transition:
blend_transition.emplace();
pop_item(iter, *blend_transition);
break;
case DisplayRequest::slide_transition:
slide_transition.emplace();
pop_item(iter, *slide_transition);
break;
case DisplayRequest::sprite_load: {
int id;
SDL_Rect r;
pop_item(iter, id);
pop_item(iter, r);
std::string_view data = pop_data(iter, r.w*r.h*2);
auto iter = std::find_if(_sprites.begin(), _sprites.end(),[&](const Sprite &x){
return x.id == id;
});
if (iter == _sprites.end()) {
iter = _sprites.insert(iter,{id});
}
iter->_txtr.reset(SDL_CreateTexture(_renderer.get(), SDL_PIXELFORMAT_ARGB1555, SDL_TEXTUREACCESS_STATIC,r.w, r.h));
SDL_SetTextureBlendMode(iter->_txtr.get(), SDL_BLENDMODE_BLEND);
SDL_UpdateTexture(iter->_txtr.get(), NULL, data.data(), r.w*2);
iter->_rect = r;
update_zindex();
} break;
case DisplayRequest::sprite_unload: {
int id;
pop_item(iter, id);
auto iter = std::remove_if(_sprites.begin(), _sprites.end(),[&](const Sprite &x){
return x.id == id;
});
_sprites.erase(iter,_sprites.end());
} break;
case DisplayRequest::sprite_hide: {
int id;
pop_item(iter, id);
auto iter = std::find_if(_sprites.begin(), _sprites.end(),[&](const Sprite &x){
return x.id == id;
});
if (iter != _sprites.end()) iter->shown = false;
} break;
case DisplayRequest::sprite_place: {
int id;
SDL_Point pt;
pop_item(iter, id);
pop_item(iter, pt);
auto iter = std::find_if(_sprites.begin(), _sprites.end(),[&](const Sprite &x){
return x.id == id;
});
if (iter != _sprites.end()) {
iter->shown = true;
iter->_rect.x = pt.x;
iter->_rect.y = pt.y;
}
} break;
case DisplayRequest::sprite_scale: {
int id;
SDL_Rect rc;
pop_item(iter, id);
pop_item(iter, rc);
auto iter = std::find_if(_sprites.begin(), _sprites.end(),[&](const Sprite &x){
return x.id == id;
});
if (iter != _sprites.end()) {
iter->shown = true;
iter->_rect = rc;
}
} break;
case DisplayRequest::sprite_zindex: {
int id;
int zindex;
pop_item(iter, id);
pop_item(iter, zindex);
auto iter = std::find_if(_sprites.begin(), _sprites.end(),[&](const Sprite &x){
return x.id == id;
});
if (iter != _sprites.end()) {
iter->zindex = zindex;
update_zindex();
}
} break;
}
}
_display_update_queue.clear();
}
refresh_screen();
}
void SDLContext::update_zindex() {
std::stable_sort(_sprites.begin(), _sprites.end(), [&](const Sprite &a, const Sprite &b){
return a.zindex < b.zindex;
});
}
template<typename T>
requires(std::is_trivially_copy_constructible_v<T>)
void SDLContext::push_item(const T &item) {
auto b = reinterpret_cast<const char *>(&item);
auto e = b + sizeof(T);
auto sz = _display_update_queue.size();
_display_update_queue.resize(sz + sizeof(T));
std::copy(b, e, _display_update_queue.begin()+sz);
}
void SDLContext::push_item(const std::string_view &item) {
auto sz = _display_update_queue.size();
_display_update_queue.resize(sz + item.size());
std::copy(item.begin(), item.end(), _display_update_queue.begin()+sz);
}
void SDLContext::push_update_msg(const SDL_Rect &rc, const uint16_t *data, int pitch) {
push_item(DisplayRequest::update);
push_item(rc);
auto sz = _display_update_queue.size();
_display_update_queue.resize(sz+rc.w*rc.h*2);
short *trg = reinterpret_cast<short *>(_display_update_queue.data()+sz);
for (int yp = 0; yp < rc.h; ++yp) {
for (int xp = 0; xp < rc.w; ++xp) {
*trg = data[xp] ^ 0x8000;
++trg;
}
data += pitch;
}
}
template<typename T>
requires(std::is_trivially_copy_constructible_v<T>)
void SDLContext::pop_item(QueueIter &iter, T &item) {
std::copy(iter, iter+sizeof(T), reinterpret_cast<char *>(&item));
iter += sizeof(T);
}
std::string_view SDLContext::pop_data(QueueIter &iter, std::size_t size) {
const char *c = iter;
iter += size;
return std::string_view(c, size);
}
void SDLContext::swap_render_buffers() {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::swap_render_buffers);
}
void SDLContext::swap_display_buffers() {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::swap_visible_buffers);
}
void SDLContext::show_blend_transition(const SDL_Rect &wrkarea, const SDL_Rect &prev,
const SDL_Rect &next, float phase) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::blend_transition);
push_item(BlendTransitionReq{wrkarea, prev, next, phase});
}
SDL_Rect SDLContext::get_window_aspect_rect() const {
SDL_Rect w;
int ww;
int wh;
SDL_GetWindowSize(_window.get(), &ww, &wh);
if (aspect_x && aspect_y) {
int apw = wh * aspect_x / aspect_y;
int aph = ww * aspect_y / aspect_x;
int fw;
int fh;
if (apw > ww) {
fw = ww;
fh = aph;
} else {
fw = apw;
fh = wh;
}
w.h = fh;
w.w = fw;
w.x = (ww - fw)/2;
w.y = (wh - fh)/2;
} else {
w.x = 0;
w.y = 0;
w.w = ww;
w.h = wh;
}
return w;
}
SDL_Point SDLContext::to_window_point(const SDL_Rect &winrc, const SDL_Point &pt) {
return {
pt.x * winrc.w / 640 + winrc.x,
pt.y * winrc.h / 480 + winrc.y,
};
}
SDL_Point SDLContext::to_source_point(const SDL_Rect &winrc, const SDL_Point &win_pt) {
return {
(win_pt.x - winrc.x) * 640 / winrc.w,
(win_pt.y - winrc.y) * 480 / winrc.h,
};
}
int SDLContext::transition_int(int beg, int end, float phase) {
int w = end - beg;
return beg + static_cast<int>(std::round(w * phase));
}
SDL_Rect SDLContext::transition_rect(const SDL_Rect &beg, const SDL_Rect &end, float phase) {
SDL_Rect out;
out.x = transition_int(beg.x, end.x, phase);
out.y = transition_int(beg.y, end.y, phase);
out.w = transition_int(beg.w, end.w, phase);
out.h = transition_int(beg.h, end.h, phase);
return out;
}
SDL_Rect SDLContext::to_window_rect(const SDL_Rect &winrc, const SDL_Rect &source_rect) {
SDL_Point pt1(source_rect.x, source_rect.y);
SDL_Point pt2(source_rect.x+source_rect.w, source_rect.y+source_rect.h);
SDL_Point wpt1(to_window_point(winrc, pt1));
SDL_Point wpt2(to_window_point(winrc, pt2));
return {wpt1.x, wpt1.y, wpt2.x - wpt1.x, wpt2.y - wpt1.y};
}
void SDLContext::set_quit_callback(std::function<void()> fn) {
_quit_callback = std::move(fn);
}
SDLContext::AudioInfo SDLContext::init_audio(const AudioConfig &config, SDL_AudioCallback cb, void *cb_ctx) {
_audio.reset();
SDL_AudioSpec aspec = {};
aspec.callback = cb;
aspec.userdata = cb_ctx;
aspec.channels = 2;
aspec.format = AUDIO_F32;
aspec.freq = 44100;
aspec.samples = 1024;
SDL_AudioSpec obtaied = {};
auto id = SDL_OpenAudioDevice(config.audioDevice, 0, &aspec, &obtaied, SDL_AUDIO_ALLOW_FREQUENCY_CHANGE|SDL_AUDIO_ALLOW_SAMPLES_CHANGE);
if (id < 1) {
std::ostringstream err;
err << "SDL Error create audio:" << SDL_GetError() << "\n";
int n = SDL_GetNumAudioDevices(0);
if (n == 0) err << "No audio devices are available" << "\n";
else {
err << "Available audio devices:";
char sep = ' ';
for (int i = 0; i < n; ++i) {
err << sep << SDL_GetAudioDeviceName(i, 0);
sep = ',';
}
}
throw std::runtime_error(err.str());
}
_audio.reset(id);
return {obtaied.freq};
}
void SDLContext::pause_audio(bool pause) {
SDL_AudioDeviceID id = _audio.get();
SDL_PauseAudioDevice(id, pause?1:0);
}
void SDLContext::close_audio() {
_audio.reset();
}
void SDLContext::set_window_icon(const void *icon_data, size_t icon_size) {
SDL_Surface *surface = SDL_LoadBMP_RW(SDL_RWFromConstMem(icon_data, icon_size), 1);
if (surface == 0) {
char buff[256];
snprintf(buff,sizeof(buff),"Can't load icon: %s", SDL_GetError());
display_error(buff);
std::ofstream x("test.dat", std::ios::out|std::ios::binary|std::ios::trunc);
x.write(reinterpret_cast<const char *>(icon_data), icon_size);
} else {
SDL_SetWindowIcon(_window.get(), surface);
}
}
extern "C" {
void put_picture_ex(unsigned short x,unsigned short y,const void *p, unsigned short *target_addr, size_t pitch);
}
void SDLContext::push_hi_image(const unsigned short *image) {
SDL_Rect rc;
rc.w= image[0];
rc.h =image[1];
push_item(rc);
auto sz = _display_update_queue.size();
auto imgsz = rc.w*rc.h;
_display_update_queue.resize(sz+imgsz*2);
unsigned short *trg = reinterpret_cast<unsigned short *>(_display_update_queue.data()+sz);
std::fill(trg, trg+imgsz, 0x8000);
put_picture_ex(0, 0, image, trg, rc.w);
std::transform(trg, trg+imgsz, trg, [](unsigned short &x)->unsigned short {return x ^ 0x8000;});
}
void SDLContext::show_mouse_cursor(const unsigned short *ms_hi_format, SDL_Point finger) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::show_mouse_cursor);
push_hi_image(ms_hi_format);
_mouse_finger = finger;
}
void SDLContext::hide_mouse_cursor() {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::hide_mouse_cursor);
}
void SDLContext::load_sprite(int sprite_id, const unsigned short *hi_image) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::sprite_load);
push_item(sprite_id);
push_hi_image(hi_image);
}
void SDLContext::place_sprite(int sprite_id, int x, int y) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::sprite_place);
push_item(sprite_id);
SDL_Point pt{x,y};
push_item(pt);
}
void SDLContext::scale_sprite(int sprite_id, int x, int y, int w, int h) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::sprite_scale);
push_item(sprite_id);
SDL_Rect pt{x,y,w,h};
push_item(pt);
}
void SDLContext::hide_sprite(int sprite_id) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::sprite_hide);
push_item(sprite_id);
}
void SDLContext::sprite_set_zindex(int sprite_id, int zindex) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::sprite_hide);
push_item(sprite_id);
push_item(zindex);
}
void SDLContext::unload_sprite(int sprite) {
std::lock_guard _(_mx);
signal_push();
push_item(DisplayRequest::sprite_unload);
push_item(sprite);
}
void SDLContext::enable_crt_filter(bool enable)
{
std::lock_guard _(_mx);
_enable_crt = enable;
signal_push();
}
bool SDLContext::is_crt_enabled() const
{
std::lock_guard _(_mx);
return _enable_crt;
}
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