int imguiInit(uint16_t viewWidth, uint16_t viewHeight)
{
if (gIm) {
assert(false);
return -1;
}
BX_BEGINP("Initializing ImGui Integration");
bx::AllocatorI* alloc = &gAlloc;
gIm = BX_NEW(alloc, ImGuiImpl);
if (!gIm) {
BX_END_FATAL();
return -2;
}
gIm->alloc = alloc;
VertexPosCoordColor::init();
// Create Graphic objects
bgfx::ShaderHandle fragmentShader = bgfx::createShader(bgfx::makeRef(imgui_fsb_h, sizeof(imgui_fsb_h)));
if (!IS_VALID(fragmentShader)) {
BX_END_FATAL();
BX_FATAL("Creating fragment-shader failed");
return -1;
}
bgfx::ShaderHandle vertexShader = bgfx::createShader(bgfx::makeRef(imgui_vsb_h, sizeof(imgui_vsb_h)));
if (!IS_VALID(vertexShader)) {
BX_END_FATAL();
BX_FATAL("Creating vertex-shader failed");
return -1;
}
gIm->progHandle = bgfx::createProgram(vertexShader, fragmentShader, true);
if (!IS_VALID(gIm->progHandle)) {
BX_END_FATAL();
BX_FATAL("Creating GPU Program failed");
return -1;
}
gIm->uniformTexture = bgfx::createUniform("u_texture", bgfx::UniformType::Int1);
gIm->vertexBuffer = bgfx::createDynamicVertexBuffer(MAX_VERTICES, VertexPosCoordColor::Decl);
gIm->indexBuffer = bgfx::createDynamicIndexBuffer(MAX_INDICES);
if (!IS_VALID(gIm->vertexBuffer) || !IS_VALID(gIm->indexBuffer)) {
BX_END_FATAL();
BX_FATAL("Creating GPU VertexBuffer failed");
return -1;
}
// Setup ImGui
ImGuiIO& conf = ImGui::GetIO();
conf.DisplaySize = ImVec2((float)viewWidth, (float)viewHeight);
conf.RenderDrawListsFn = imguiDrawLists;
conf.MemAllocFn = imguiAlloc;
conf.MemFreeFn = imguiFree;
conf.KeyMap[ImGuiKey_Tab] = SDLK_TAB;
conf.KeyMap[ImGuiKey_LeftArrow] = SDL_SCANCODE_LEFT;
conf.KeyMap[ImGuiKey_RightArrow] = SDL_SCANCODE_RIGHT;
conf.KeyMap[ImGuiKey_UpArrow] = SDL_SCANCODE_UP;
conf.KeyMap[ImGuiKey_DownArrow] = SDL_SCANCODE_DOWN;
conf.KeyMap[ImGuiKey_Home] = SDL_SCANCODE_HOME;
conf.KeyMap[ImGuiKey_End] = SDL_SCANCODE_END;
conf.KeyMap[ImGuiKey_Delete] = SDLK_DELETE;
conf.KeyMap[ImGuiKey_Backspace] = SDLK_BACKSPACE;
conf.KeyMap[ImGuiKey_Enter] = SDLK_RETURN;
conf.KeyMap[ImGuiKey_Escape] = SDLK_ESCAPE;
conf.KeyMap[ImGuiKey_A] = SDLK_a;
conf.KeyMap[ImGuiKey_C] = SDLK_c;
conf.KeyMap[ImGuiKey_V] = SDLK_v;
conf.KeyMap[ImGuiKey_X] = SDLK_x;
conf.KeyMap[ImGuiKey_Y] = SDLK_y;
conf.KeyMap[ImGuiKey_Z] = SDLK_z;
uint8_t* fontData;
int fontWidth, fontHeight, bpp;
conf.Fonts->GetTexDataAsAlpha8(&fontData, &fontWidth, &fontHeight, &bpp);
gIm->fontTexHandle = bgfx::createTexture2D((uint16_t)fontWidth, (uint16_t)fontHeight, 1, bgfx::TextureFormat::A8,
BGFX_TEXTURE_MIN_POINT | BGFX_TEXTURE_MAG_POINT,
bgfx::makeRef(fontData, fontWidth*fontHeight*bpp));
if (!IS_VALID(gIm->fontTexHandle)) {
BX_END_FATAL();
BX_FATAL("ImGui: Could not create font texture");
return -1;
}
conf.Fonts->TexID = (void*)&gIm->fontTexHandle;
ImGui::GetStyle().AntiAliasedLines = false;
ImGui::NewFrame();
BX_END_OK();
return 0;
}
SwapChainGL* GlContext::createSwapChain(void* _nwh)
{
return BX_NEW(g_allocator, SwapChainGL)( (::Window)_nwh, m_visualInfo, m_context);
}
SwapChainGL* GlContext::createSwapChain(void* _nwh)
{
return BX_NEW(g_allocator, SwapChainGL)(m_display, m_config, m_context, (EGLNativeWindowType)_nwh);
}
