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add opengl2 implementation

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This commit is contained in:
sonoro1234
2018-06-21 17:06:31 +02:00
parent 686e062749
commit 532feb55ff
2 changed files with 22 additions and 2 deletions
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20
cimgui/cimgui.h
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@@ -1038,6 +1038,18 @@ struct GLFWwindow;
// About GLSL version:
// The 'glsl_version' initialization parameter defaults to "#version 150" if NULL.
// Only override if your GL version doesn't handle this GLSL version. Keep NULL if unsure!
// Called by Init/NewFrame/Shutdown
// ImGui Renderer for: OpenGL2 (legacy OpenGL, fixed pipeline)
// This needs to be used along with a Platform Binding (e.g. GLFW, SDL, Win32, custom..)
// Implemented features:
// [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID in imgui.cpp.
// **DO NOT USE THIS CODE IF YOUR CODE/ENGINE IS USING MODERN OPENGL (SHADERS, VBO, VAO, etc.)**
// **Prefer using the code in imgui_impl_opengl3.cpp**
// This code is mostly provided as a reference to learn how ImGui integration works, because it is shorter to read.
// If your code is using GL3+ context or any semi modern OpenGL calls, using this is likely to make everything more
// complicated, will require your code to reset every single OpenGL attributes to their initial state, and might
// confuse your GPU driver.
// The GL2 code is unable to reset attributes or even call e.g. "glUseProgram(0)" because they don't exist in that API.
// Called by Init/NewFrame/Shutdown
struct GlyphRangesBuilder
{
@@ -1726,6 +1738,14 @@ CIMGUI_API bool ImGui_ImplOpenGL3_CreateFontsTexture();
CIMGUI_API void ImGui_ImplOpenGL3_DestroyFontsTexture();
CIMGUI_API bool ImGui_ImplOpenGL3_CreateDeviceObjects();
CIMGUI_API void ImGui_ImplOpenGL3_DestroyDeviceObjects();
CIMGUI_API bool ImGui_ImplOpenGL2_Init();
CIMGUI_API void ImGui_ImplOpenGL2_Shutdown();
CIMGUI_API void ImGui_ImplOpenGL2_NewFrame();
CIMGUI_API void ImGui_ImplOpenGL2_RenderDrawData(ImDrawData* draw_data);
CIMGUI_API bool ImGui_ImplOpenGL2_CreateFontsTexture();
CIMGUI_API void ImGui_ImplOpenGL2_DestroyFontsTexture();
CIMGUI_API bool ImGui_ImplOpenGL2_CreateDeviceObjects();
CIMGUI_API void ImGui_ImplOpenGL2_DestroyDeviceObjects();
/////////////////////////hand written functions

4
cimgui/generator/generator.bat
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@@ -12,10 +12,10 @@ set PATH=%PATH%;C:\mingw32\bin;C:\luaGL;
:: gcc -E -P no #pragma location information
::generate preprocessed file
gcc -E -C -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ../../imgui/imgui.h ../../imgui/examples/imgui_impl_glfw.h ../../imgui/examples/imgui_impl_opengl3.h > 1.txt
gcc -E -C -DIMGUI_DISABLE_OBSOLETE_FUNCTIONS -DIMGUI_API="" -DIMGUI_IMPL_API="" ../../imgui/imgui.h ../../imgui/examples/imgui_impl_glfw.h ../../imgui/examples/imgui_impl_opengl3.h ../../imgui/examples/imgui_impl_opengl2.h > 1.txt
::process preprocessed file
type 1.txt | luajit.exe ./generator.lua true imgui imgui_impl_glfw imgui_impl_opengl3 > out.txt
type 1.txt | luajit.exe ./generator.lua true imgui imgui_impl_glfw imgui_impl_opengl3 imgui_impl_opengl2 > out.txt
::copy cimgui.h and cimgui.cpp
copy .\cimgui.h ..\cimgui.h