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Backends: OpenGL3: Tweaked initialization code allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before ImGui_ImplOpenGL3_NewFrame() if for some reason they wanted.

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This commit is contained in:
omar 2019-09-16 12:08:23 +02:00
parent c077dd4872
commit cc288e073c
2 changed files with 11 additions and 15 deletions
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2
docs/CHANGELOG.txt
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@ -51,6 +51,8 @@ Other Changes:
- Added a mechanism to compact/free the larger allocations of unused windows (buffers are compacted when - Added a mechanism to compact/free the larger allocations of unused windows (buffers are compacted when
a window is unused for 60 seconds, as per io.ConfigWindowsMemoryCompactTimer = 60.0f). Note that memory a window is unused for 60 seconds, as per io.ConfigWindowsMemoryCompactTimer = 60.0f). Note that memory
usage has never been reported as a problem, so this is merely a touch of overzealous luxury. (#2636) usage has never been reported as a problem, so this is merely a touch of overzealous luxury. (#2636)
- Backends: OpenGL3: Tweaked initialization code allow application calling ImGui_ImplOpenGL3_CreateFontsTexture()
before ImGui_ImplOpenGL3_NewFrame() if for some reason they wanted.
- Backends: DX11: Fixed GSGetShader() call not passing an initialized instance count, - Backends: DX11: Fixed GSGetShader() call not passing an initialized instance count,
would generally make the debug layer complain (Added in 1.72). would generally make the debug layer complain (Added in 1.72).
- Backends: Vulkan: Added support for specifying multisample count. - Backends: Vulkan: Added support for specifying multisample count.

24
examples/imgui_impl_opengl3.cpp
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@ -13,6 +13,7 @@
// CHANGELOG // CHANGELOG
// (minor and older changes stripped away, please see git history for details) // (minor and older changes stripped away, please see git history for details)
// 2019-09-16: OpenGL: Tweak initialization code to allow application calling ImGui_ImplOpenGL3_CreateFontsTexture() before the first NewFrame() call.
// 2019-05-29: OpenGL: Desktop GL only: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag. // 2019-05-29: OpenGL: Desktop GL only: Added support for large mesh (64K+ vertices), enable ImGuiBackendFlags_RendererHasVtxOffset flag.
// 2019-04-30: OpenGL: Added support for special ImDrawCallback_ResetRenderState callback to reset render state. // 2019-04-30: OpenGL: Added support for special ImDrawCallback_ResetRenderState callback to reset render state.
// 2019-03-29: OpenGL: Not calling glBindBuffer more than necessary in the render loop. // 2019-03-29: OpenGL: Not calling glBindBuffer more than necessary in the render loop.
@ -164,7 +165,7 @@ void ImGui_ImplOpenGL3_Shutdown()
void ImGui_ImplOpenGL3_NewFrame() void ImGui_ImplOpenGL3_NewFrame()
{ {
if (!g_FontTexture) if (!g_ShaderHandle)
ImGui_ImplOpenGL3_CreateDeviceObjects(); ImGui_ImplOpenGL3_CreateDeviceObjects();
} }
@ -613,20 +614,13 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects()
void ImGui_ImplOpenGL3_DestroyDeviceObjects() void ImGui_ImplOpenGL3_DestroyDeviceObjects()
{ {
if (g_VboHandle) glDeleteBuffers(1, &g_VboHandle); if (g_VboHandle) { glDeleteBuffers(1, &g_VboHandle); g_VboHandle = 0; }
if (g_ElementsHandle) glDeleteBuffers(1, &g_ElementsHandle); if (g_ElementsHandle) { glDeleteBuffers(1, &g_ElementsHandle); g_ElementsHandle = 0; }
g_VboHandle = g_ElementsHandle = 0; if (g_ShaderHandle && g_VertHandle) { glDetachShader(g_ShaderHandle, g_VertHandle); }
if (g_ShaderHandle && g_FragHandle) { glDetachShader(g_ShaderHandle, g_FragHandle); }
if (g_ShaderHandle && g_VertHandle) glDetachShader(g_ShaderHandle, g_VertHandle); if (g_VertHandle) { glDeleteShader(g_VertHandle); g_VertHandle = 0; }
if (g_VertHandle) glDeleteShader(g_VertHandle); if (g_FragHandle) { glDeleteShader(g_FragHandle); g_FragHandle = 0; }
g_VertHandle = 0; if (g_ShaderHandle) { glDeleteProgram(g_ShaderHandle); g_ShaderHandle = 0; }
if (g_ShaderHandle && g_FragHandle) glDetachShader(g_ShaderHandle, g_FragHandle);
if (g_FragHandle) glDeleteShader(g_FragHandle);
g_FragHandle = 0;
if (g_ShaderHandle) glDeleteProgram(g_ShaderHandle);
g_ShaderHandle = 0;
ImGui_ImplOpenGL3_DestroyFontsTexture(); ImGui_ImplOpenGL3_DestroyFontsTexture();
} }