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Examples: GLFW + OpenGL3: Initial attempt at implementing the viewport/platform api. (WIP/test API) (#1542)

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This commit is contained in:
omar
2018-02-27 23:27:41 +01:00
parent 25349b31d7
commit 4cee46f909
3 changed files with 270 additions and 29 deletions
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32
examples/imgui_impl_opengl3.cpp
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@ -25,14 +25,20 @@ static int g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0;
static int g_AttribLocationPosition = 0, g_AttribLocationUV = 0, g_AttribLocationColor = 0;
static unsigned int g_VboHandle = 0, g_ElementsHandle = 0;
// Forward Declarations
static void ImGui_ImplOpenGL3_InitPlatformInterface();
static void ImGui_ImplOpenGL3_ShutdownPlatformInterface();
// Functions
bool ImGui_ImplOpenGL3_Init()
{
ImGui_ImplOpenGL3_InitPlatformInterface();
return true;
}
void ImGui_ImplOpenGL3_Shutdown()
{
ImGui_ImplOpenGL3_ShutdownPlatformInterface();
ImGui_ImplOpenGL3_DestroyDeviceObjects();
}
@ -298,3 +304,29 @@ void ImGui_ImplOpenGL3_DestroyDeviceObjects()
ImGui_ImplOpenGL3_DestroyFontsTexture();
}
// --------------------------------------------------------------------------------------------------------
// Platform Windows
// --------------------------------------------------------------------------------------------------------
#include "imgui_internal.h" // ImGuiViewport
static void ImGui_ImplOpenGL3_RenderViewport(ImGuiViewport* viewport)
{
ImVec4 clear_color = ImGui::GetStyle().Colors[ImGuiCol_WindowBg];
glClearColor(clear_color.x, clear_color.y, clear_color.z, 1.0f); // FIXME-PLATFORM
glClear(GL_COLOR_BUFFER_BIT);
ImGui_ImplOpenGL3_RenderDrawData(&viewport->DrawData);
}
void ImGui_ImplOpenGL3_InitPlatformInterface()
{
ImGuiIO& io = ImGui::GetIO();
io.RendererInterface.RenderViewport = ImGui_ImplOpenGL3_RenderViewport;
}
void ImGui_ImplOpenGL3_ShutdownPlatformInterface()
{
ImGuiIO& io = ImGui::GetIO();
memset(&io.RendererInterface, 0, sizeof(io.RendererInterface));
}