326 lines
11 KiB
C
326 lines
11 KiB
C
#include "wasm3/source/wasm3.h"
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#include "wasm3/source/m3_env.h"
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#include "SDL2/SDL.h"
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#include "SDL2/SDL_video.h"
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#include "SDL2/SDL_render.h"
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#include <math.h>
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#include <stdio.h>
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#include <malloc.h>
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void* loadFile(size_t* sizeOut, const char* filename) {
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FILE* file = fopen(filename, "rb");
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assert(file != NULL);
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fseek(file, 0, SEEK_END);
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size_t size = (size_t)ftell(file);
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rewind(file);
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void* buffer = malloc(size);
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assert(fread(buffer, size, 1, file) == 1);
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fclose(file);
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*sizeOut = size;
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return buffer;
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}
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void verifyM3(IM3Runtime runtime, M3Result result) {
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if (result != m3Err_none) {
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M3ErrorInfo info;
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m3_GetErrorInfo(runtime, &info);
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fprintf(stderr, "WASM error: %s (%s)\n", result, info.message);
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exit(1);
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}
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}
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m3ApiRawFunction(math1) {
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m3ApiReturnType(float);
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m3ApiGetArg(float, v);
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*raw_return = ((float(*)(float))_ctx->userdata)(v);
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m3ApiSuccess();
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}
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m3ApiRawFunction(math2) {
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m3ApiReturnType(float);
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m3ApiGetArg(float, a);
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m3ApiGetArg(float, b);
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*raw_return = ((float(*)(float, float))_ctx->userdata)(a, b);
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m3ApiSuccess();
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}
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m3ApiRawFunction(nopFunc) {
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m3ApiSuccess();
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}
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void linkSystemFunctions(IM3Runtime runtime, IM3Module mod) {
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m3_LinkRawFunctionEx(mod, "env", "acos", "f(f)", math1, acosf);
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m3_LinkRawFunctionEx(mod, "env", "asin", "f(f)", math1, asinf);
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m3_LinkRawFunctionEx(mod, "env", "atan", "f(f)", math1, atanf);
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m3_LinkRawFunctionEx(mod, "env", "atan2", "f(ff)", math2, atan2f);
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m3_LinkRawFunctionEx(mod, "env", "cos", "f(f)", math1, cosf);
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m3_LinkRawFunctionEx(mod, "env", "exp", "f(f)", math1, expf);
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m3_LinkRawFunctionEx(mod, "env", "log", "f(f)", math1, logf);
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m3_LinkRawFunctionEx(mod, "env", "sin", "f(f)", math1, sinf);
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m3_LinkRawFunctionEx(mod, "env", "tan", "f(f)", math1, tanf);
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m3_LinkRawFunctionEx(mod, "env", "pow", "f(ff)", math2, powf);
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m3_LinkRawFunction(mod, "env", "logChar", "v(i)", nopFunc);
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for(int i = 9; i < 64; ++i) {
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char name[128];
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sprintf(name, "reserved%d", i);
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m3_LinkRawFunction(mod, "env", name, "v()", nopFunc);
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}
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}
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m3ApiRawFunction(platformTrampoline) {
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IM3Function func = (IM3Function)_ctx->userdata;
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uint32_t retCount = m3_GetRetCount(func);
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uint32_t argCount = m3_GetArgCount(func);
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const void* args[16];
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for(uint32_t i = 0; i < argCount; ++i) {
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args[i] = &_sp[retCount + i];
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}
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verifyM3(runtime, m3_Call(func, m3_GetArgCount(func), args));
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for(uint32_t i = 0; i < retCount; ++i) {
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args[i] = &_sp[i];
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}
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verifyM3(runtime, m3_GetResults(func, retCount, args));
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m3ApiSuccess();
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}
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void appendType(char* signature, M3ValueType type) {
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if(type == c_m3Type_i32) {
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strcat(signature, "i");
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} else if(type == c_m3Type_i64) {
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strcat(signature, "l");
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} else if(type == c_m3Type_f32) {
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strcat(signature, "f");
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} else {
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fprintf(stderr, "Unsupported platform type %d\n", type);
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exit(1);
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}
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}
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void linkPlatformFunctions(IM3Runtime runtime, IM3Module cartMod, IM3Module platformMod) {
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for(u32 functionIndex = 0; functionIndex < platformMod->numFunctions; ++functionIndex) {
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M3Function function = platformMod->functions[functionIndex];
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if(function.export_name != NULL) {
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IM3Function iFunc;
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verifyM3(runtime, m3_FindFunction(&iFunc, runtime, function.export_name));
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char signature[128] = { 0 };
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if(m3_GetRetCount(iFunc) > 0) {
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appendType(signature, m3_GetRetType(iFunc, 0));
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} else {
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strcat(signature, "v");
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}
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strcat(signature, "(");
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for(uint32_t i = 0; i < m3_GetArgCount(iFunc); ++i) {
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appendType(signature, m3_GetArgType(iFunc, i));
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}
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strcat(signature, ")");
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m3_LinkRawFunctionEx(cartMod, "env", function.export_name, signature, platformTrampoline, iFunc);
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}
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}
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}
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void* loadUw8(uint32_t* sizeOut, IM3Runtime runtime, IM3Function loadFunc, const char* filename) {
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size_t uw8Size;
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void* uw8 = loadFile(&uw8Size, filename);
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uint8_t* memory = m3_GetMemory(runtime, NULL, 0);
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memcpy(memory, uw8, uw8Size);
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verifyM3(runtime, m3_CallV(loadFunc, (uint32_t)uw8Size));
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verifyM3(runtime, m3_GetResultsV(loadFunc, sizeOut));
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void* wasm = malloc(*sizeOut);
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memcpy(wasm, memory, *sizeOut);
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return wasm;
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}
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const uint32_t uw8buttonScanCodes[] = {
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SDL_SCANCODE_UP, SDL_SCANCODE_DOWN, SDL_SCANCODE_LEFT, SDL_SCANCODE_RIGHT,
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SDL_SCANCODE_Z, SDL_SCANCODE_X, SDL_SCANCODE_A, SDL_SCANCODE_S
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};
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typedef struct {
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IM3Runtime runtime;
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IM3Module platform;
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IM3Module cart;
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} Uw8Runtime;
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void initRuntime(Uw8Runtime* runtime, IM3Environment env,
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void* platform, size_t platformSize, void* cart, size_t cartSize) {
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runtime->runtime = m3_NewRuntime(env, 65536, NULL);
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runtime->runtime->memory.maxPages = 4;
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verifyM3(runtime->runtime, ResizeMemory(runtime->runtime, 4));
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verifyM3(runtime->runtime, m3_ParseModule(env, &runtime->platform, platform, platformSize));
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runtime->platform->memoryImported = true;
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verifyM3(runtime->runtime, m3_LoadModule(runtime->runtime, runtime->platform));
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linkSystemFunctions(runtime->runtime, runtime->platform);
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verifyM3(runtime->runtime, m3_CompileModule(runtime->platform));
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verifyM3(runtime->runtime, m3_RunStart(runtime->platform));
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verifyM3(runtime->runtime, m3_ParseModule(env, &runtime->cart, cart, cartSize));
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runtime->platform->memoryImported = true;
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verifyM3(runtime->runtime, m3_LoadModule(runtime->runtime, runtime->cart));
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linkSystemFunctions(runtime->runtime, runtime->cart);
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linkPlatformFunctions(runtime->runtime, runtime->cart, runtime->platform);
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verifyM3(runtime->runtime, m3_CompileModule(runtime->cart));
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verifyM3(runtime->runtime, m3_RunStart(runtime->cart));
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}
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typedef struct AudioState {
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Uw8Runtime runtime;
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uint8_t* memory;
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IM3Function snd;
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uint8_t registers[32];
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uint32_t sampleIndex;
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} AudioState;
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void audioCallback(void* userdata, Uint8* stream, int len) {
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AudioState* state = (AudioState*)userdata;
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float* samples = (float*)stream;
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int numSamples = len / sizeof(float);
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memcpy(state->memory + 0x50, state->registers, 32);
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for(int i = 0; i < numSamples; ++i) {
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m3_CallV(state->snd, state->sampleIndex++);
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m3_GetResultsV(state->snd, samples++);
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}
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}
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int main(int argc, const char** argv) {
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if(argc != 2) {
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fprintf(stderr, "Usage: uw8-wasm3 <UW8-MODULE>\n");
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return 1;
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}
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SDL_Init(SDL_INIT_VIDEO | SDL_INIT_AUDIO);
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SDL_Window* window;
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SDL_Renderer* renderer;
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SDL_CreateWindowAndRenderer(640, 480, SDL_WINDOW_RESIZABLE, &window, &renderer);
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SDL_RenderSetLogicalSize(renderer, 320, 240);
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SDL_Texture* texture = SDL_CreateTexture(renderer, SDL_PIXELFORMAT_ABGR8888, SDL_TEXTUREACCESS_STREAMING, 320, 240);
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uint32_t* pixels32 = malloc(320*240*4);
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IM3Environment env = m3_NewEnvironment();
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IM3Runtime loaderRuntime = m3_NewRuntime(env, 65536, NULL);
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loaderRuntime->memory.maxPages = 4;
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verifyM3(loaderRuntime, ResizeMemory(loaderRuntime, 4));
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size_t loaderSize;
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void* loaderWasm = loadFile(&loaderSize, "loader.wasm");
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IM3Module loaderMod;
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verifyM3(loaderRuntime, m3_ParseModule(env, &loaderMod, loaderWasm, loaderSize));
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loaderMod->memoryImported = true;
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verifyM3(loaderRuntime, m3_LoadModule(loaderRuntime, loaderMod));
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verifyM3(loaderRuntime, m3_CompileModule(loaderMod));
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verifyM3(loaderRuntime, m3_RunStart(loaderMod));
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IM3Function loadFunc;
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verifyM3(loaderRuntime, m3_FindFunction(&loadFunc, loaderRuntime, "load_uw8"));
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uint32_t platformSize;
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void* platformWasm = loadUw8(&platformSize, loaderRuntime, loadFunc, "platform.uw8");
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uint32_t cartSize;
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void* cartWasm = loadUw8(&cartSize, loaderRuntime, loadFunc, argv[1]);
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m3_FreeRuntime(loaderRuntime);
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bool quit = false;
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while(!quit) {
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Uw8Runtime runtime;
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initRuntime(&runtime, env, platformWasm, platformSize, cartWasm, cartSize);
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uint8_t* memory = m3_GetMemory(runtime.runtime, NULL, 0);
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assert(memory != NULL);
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IM3Function updFunc;
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bool hasUpdFunc = m3_FindFunction(&updFunc, runtime.runtime, "upd") == NULL;
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AudioState audioState;
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initRuntime(&audioState.runtime, env, platformWasm, platformSize, cartWasm, cartSize);
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audioState.memory = m3_GetMemory(audioState.runtime.runtime, NULL, 0);
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if(m3_FindFunction(&audioState.snd, audioState.runtime.runtime, "snd") != NULL) {
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verifyM3(audioState.runtime.runtime, m3_FindFunction(&audioState.snd, audioState.runtime.runtime, "sndGes"));
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}
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memcpy(audioState.registers, audioState.memory + 0x50, 32);
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audioState.sampleIndex = 0;
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SDL_AudioSpec audioSpec;
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audioSpec.freq = 44100;
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audioSpec.format = AUDIO_F32SYS;
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audioSpec.channels = 2;
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audioSpec.samples = 256;
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audioSpec.callback = audioCallback;
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audioSpec.userdata = &audioState;
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SDL_AudioDeviceID audioDevice = SDL_OpenAudioDevice(NULL, 0, &audioSpec, &audioSpec, 0);
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SDL_PauseAudioDevice(audioDevice, 0);
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uint32_t startTime = SDL_GetTicks();
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bool restart = false;
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while(!quit && !restart) {
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SDL_Event event;
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while(SDL_PollEvent(&event)) {
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switch(event.type) {
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case SDL_QUIT:
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quit = true;
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break;
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case SDL_KEYDOWN:
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switch(event.key.keysym.sym) {
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case SDLK_ESCAPE:
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quit = true;
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break;
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case SDLK_r:
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restart = true;
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break;
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}
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break;
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}
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}
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uint32_t time = SDL_GetTicks() - startTime;
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*(uint32_t*)(memory + 64) = time;
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int numKeys;
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const Uint8* keyState = SDL_GetKeyboardState(&numKeys);
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uint8_t buttons = 0;
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for(int i = 0; i < 8; ++i) {
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if(keyState[uw8buttonScanCodes[i]]) {
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buttons |= 1 << i;
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}
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}
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memory[0x44] = buttons;
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if(hasUpdFunc) {
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verifyM3(runtime.runtime, m3_CallV(updFunc));
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}
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memcpy(audioState.registers, memory + 0x50, 32);
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uint32_t* palette = (uint32_t*)(memory + 0x13000);
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uint8_t* pixels = memory + 120;
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for(uint32_t i = 0; i < 320*240; ++i) {
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pixels32[i] = palette[pixels[i]];
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}
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SDL_UpdateTexture(texture, NULL, pixels32, 320*4);
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SDL_RenderClear(renderer);
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SDL_RenderCopy(renderer, texture, NULL, NULL);
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SDL_RenderPresent(renderer);
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uint32_t frame = (uint32_t)((uint64_t)time * 60 / 1000);
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uint32_t offset = time - (uint32_t)((uint64_t)frame * 1000 / 60);
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uint32_t nextFrameTime = (uint32_t)((uint64_t)(frame + 1) * 1000 / 60 + (offset < 4 ? offset : 4));
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uint32_t delay = startTime + nextFrameTime - SDL_GetTicks();
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if(delay < 33) {
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SDL_Delay(delay);
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}
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}
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SDL_CloseAudioDevice(audioDevice);
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m3_FreeRuntime(audioState.runtime.runtime);
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m3_FreeRuntime(runtime.runtime);
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}
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return 0;
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}
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