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#include <plugin.h>
#include <SDL2/SDL.h>
struct SDLColour {
int r;
int g;
int b;
int a;
};
struct SDLSession {
SDL_Window* window = NULL;
SDL_Renderer* renderer = NULL;
int screen_width;
int screen_height;
bool initialised = false;
bool cycle = false;
};
const char* sessionName = "::sdlsession%d";
const char* colourName = "::sdlcolour%d";
const char* badHandle = "cannot obtain data from handle";
/*
* Create connection in global variables returning handle
*/
MYFLT createHandle(csnd::Csound* csound, SDLSession** sdl) {
char buffer[32];
int handle = 0;
snprintf(buffer, 32, sessionName, handle);
while ((*sdl = (SDLSession*) csound->query_global_variable(buffer)) != NULL) {
snprintf(buffer, 32, sessionName, ++handle);
}
csound->create_global_variable(buffer, sizeof(SDLSession));
*sdl = (SDLSession*) csound->query_global_variable(buffer);
return FL(handle);
}
MYFLT CreateColour(csnd::Csound* csound, SDLColour** sdlc) {
char buffer[32];
int handle = 0;
snprintf(buffer, 32, colourName, handle);
while ((*sdlc = (SDLColour*) csound->query_global_variable(buffer)) != NULL) {
snprintf(buffer, 32, colourName, ++handle);
}
csound->create_global_variable(buffer, sizeof(SDLColour));
*sdlc = (SDLColour*) csound->query_global_variable(buffer);
return FL(handle);
}
SDLSession* getSession(csnd::Csound* csound, MYFLT handle) {
char buffer[32];
snprintf(buffer, 32, sessionName, (int)handle);
return (SDLSession*) csound->query_global_variable(buffer);
}
SDLColour* getColour(csnd::Csound* csound, MYFLT handle) {
char buffer[32];
snprintf(buffer, 32, colourName, (int)handle);
return (SDLColour*) csound->query_global_variable(buffer);
}
// ihandle, kmouseTrigger, kmouseXratio, kmouseYratio sdlinit SwindowName, iWidth, iHeight, ifps
struct sdlinit : csnd::Plugin<4, 4> {
static constexpr char const *otypes = "ikkk";
static constexpr char const *itypes = "Siii";
SDLSession* sdl;
uint64_t kcnt;
uint64_t frameK;
bool mouseDown;
int init() {
csound->plugin_deinit(this);
outargs[0] = createHandle(csound, &sdl);
mouseDown = false;
STRINGDAT &windowName = inargs.str_data(0);
int xSize = (int) inargs[1];
int ySize = (int) inargs[2];
int fps = (int) inargs[3];
try {
init_sdl(windowName.data, xSize, ySize);
} catch (const std::exception &e) {
return csound->init_error(e.what());
}
kcnt = insdshead->kcounter;
frameK = (uint64_t) (FL(FL(1)/FL(fps)) / insdshead->onedkr);
return OK;
}
void init_sdl(char* windowName, int xSize, int ySize) {
if (sdl->initialised) {
return;
}
sdl->screen_width = xSize;
sdl->screen_height = ySize;
if (SDL_Init(SDL_INIT_VIDEO) < 0) {
throw std::runtime_error(csound->strdup(SDL_GetError()));
}
SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "1");
sdl->window = SDL_CreateWindow(windowName, SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, xSize, ySize, SDL_WINDOW_SHOWN );
if (sdl->window == NULL) {
throw std::runtime_error(csound->strdup(SDL_GetError()));
}
sdl->renderer = SDL_CreateRenderer(sdl->window, -1, SDL_RENDERER_ACCELERATED);
if (sdl->renderer == NULL) {
throw std::runtime_error(csound->strdup(SDL_GetError()));
}
sdl->initialised = true;
}
int deinit() {
SDL_DestroyRenderer(sdl->renderer);
SDL_DestroyWindow(sdl->window);
sdl->window = NULL;
sdl->renderer = NULL;
sdl->initialised = false;
SDL_Quit();
return OK;
}
void setMouse() {
int x;
int y;
SDL_GetMouseState(&x, &y);
outargs[1] = 1;
outargs[2] = (MYFLT) (FL(x) / FL(sdl->screen_width));
outargs[3] = (MYFLT) (FL(y) / FL(sdl->screen_height));
}
int kperf() {
if (insdshead->kcounter % frameK != 0) {
sdl->cycle = false;
return OK;
}
SDL_Event e;
outargs[1] = 0;
outargs[2] = 0;
outargs[3] = 0;
while (SDL_PollEvent(&e) != 0) {
// e.type == SDL_MOUSEMOTION ||
// || e.type == SDL_MOUSEBUTTONUP
if (e.type == SDL_MOUSEBUTTONDOWN || (mouseDown && e.type == SDL_MOUSEMOTION)) {
setMouse();
mouseDown = true;
}
if (e.type == SDL_MOUSEBUTTONUP) {
mouseDown = false;
}
}
sdl->cycle = true;
SDL_RenderPresent(sdl->renderer);
SDL_SetRenderDrawColor(sdl->renderer, 0xFF, 0xFF, 0xFF, 0xFF );
SDL_RenderClear(sdl->renderer);
return OK;
}
};
// ihandle sdlcolour red, green, blue, alpha
struct sdlcolour : csnd::Plugin<1, 4> {
static constexpr char const *otypes = "i";
static constexpr char const *itypes = "kkkk";
SDLColour* sdlc;
int init() {
outargs[0] = CreateColour(csound, &sdlc);
return OK;
}
int kperf() {
sdlc->r = (int) inargs[0];
sdlc->g = (int) inargs[1];
sdlc->b = (int) inargs[2];
sdlc->a = (int) inargs[3];
return OK;
}
};
// sdlrect ihandle, icolourhandle, kx, ky, kwidth, kheight
struct sdlrect : csnd::InPlug<6> {
static constexpr char const *otypes = "";
static constexpr char const *itypes = "iikkkk";
SDLSession* sdl;
SDLColour* sdlc;
int init() {
if (!(sdl = getSession(csound, args[0]))) {
return csound->init_error(badHandle);
}
if (!(sdlc = getColour(csound, args[1]))) {
return csound->init_error(badHandle);
}
return OK;
}
int kperf() {
if (!sdl->cycle) {
return OK;
}
int xpos = (int) sdl->screen_width * args[2];
int ypos = (int) sdl->screen_height * args[3];
int width = (int) sdl->screen_width * args[4];
int height = (int) sdl->screen_height * args[5];
SDL_Rect fillRect = {
xpos, ypos, width, height
};
SDL_SetRenderDrawColor(sdl->renderer, sdlc->r, sdlc->g, sdlc->b, sdlc->a);
SDL_RenderFillRect(sdl->renderer, &fillRect);
return OK;
}
};
struct sdlline : csnd::InPlug<6> {
static constexpr char const *otypes = "";
static constexpr char const *itypes = "iikkkk";
SDLSession* sdl;
SDLColour* sdlc;
int init() {
if (!(sdl = getSession(csound, args[0]))) {
return csound->init_error(badHandle);
}
if (!(sdlc = getColour(csound, args[1]))) {
return csound->init_error(badHandle);
}
return OK;
}
int kperf() {
if (!sdl->cycle) {
return OK;
}
int xpos1 = (int) sdl->screen_width * args[2];
int ypos1 = (int) sdl->screen_height * args[3];
int xpos2 = (int) sdl->screen_width * args[4];
int ypos2 = (int) sdl->screen_height * args[5];
SDL_SetRenderDrawColor(sdl->renderer, sdlc->r, sdlc->g, sdlc->b, sdlc->a);
SDL_RenderDrawLine(sdl->renderer, xpos1, ypos1, xpos2, ypos2);
return OK;
}
};
#include <modload.h>
void csnd::on_load(csnd::Csound *csound) {
csnd::plugin<sdlinit>(csound, "sdlinit", csnd::thread::ik);
csnd::plugin<sdlrect>(csound, "sdlrect", csnd::thread::ik);
csnd::plugin<sdlcolour>(csound, "sdlcolour", csnd::thread::ik);
csnd::plugin<sdlline>(csound, "sdlline", csnd::thread::ik);
}
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