diff --git a/external/ImGui/source/imgui_impl_opengl3.cpp b/external/ImGui/source/imgui_impl_opengl3.cpp index cd9e385c3..8472bec73 100644 --- a/external/ImGui/source/imgui_impl_opengl3.cpp +++ b/external/ImGui/source/imgui_impl_opengl3.cpp @@ -5,6 +5,7 @@ // Implemented features: // [X] Renderer: User texture binding. Use 'GLuint' OpenGL texture identifier as void*/ImTextureID. Read the FAQ about ImTextureID! +// [X] Renderer: Multi-viewport support. Enable with 'io.ConfigFlags |= ImGuiConfigFlags_ViewportsEnable'. // [x] Renderer: Desktop GL only: Support for large meshes (64k+ vertices) with 16-bit indices. // You can copy and use unmodified imgui_impl_* files in your project. See examples/ folder for examples of using this. @@ -13,6 +14,7 @@ // CHANGELOG // (minor and older changes stripped away, please see git history for details) +// 2021-XX-XX: Platform: Added support for multiple windows via the ImGuiPlatformIO interface. // 2021-01-03: OpenGL: Backup, setup and restore GL_STENCIL_TEST state. // 2020-10-23: OpenGL: Backup, setup and restore GL_PRIMITIVE_RESTART state. // 2020-10-15: OpenGL: Use glGetString(GL_VERSION) instead of glGetIntegerv(GL_MAJOR_VERSION, ...) when the later returns zero (e.g. Desktop GL 2.x) @@ -150,6 +152,10 @@ static GLint g_AttribLocationTex = 0, g_AttribLocationProjMtx = 0; static GLuint g_AttribLocationVtxPos = 0, g_AttribLocationVtxUV = 0, g_AttribLocationVtxColor = 0; // Vertex attributes location 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(const char* glsl_version) { @@ -177,6 +183,7 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version) if (g_GlVersion >= 320) io.BackendFlags |= ImGuiBackendFlags_RendererHasVtxOffset; // We can honor the ImDrawCmd::VtxOffset field, allowing for large meshes. #endif + io.BackendFlags |= ImGuiBackendFlags_RendererHasViewports; // We can create multi-viewports on the Renderer side (optional) // Store GLSL version string so we can refer to it later in case we recreate shaders. // Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure. @@ -228,11 +235,15 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version) GLint current_texture; glGetIntegerv(GL_TEXTURE_BINDING_2D, ¤t_texture); + if (io.ConfigFlags & ImGuiConfigFlags_ViewportsEnable) + ImGui_ImplOpenGL3_InitPlatformInterface(); + return true; } void ImGui_ImplOpenGL3_Shutdown() { + ImGui_ImplOpenGL3_ShutdownPlatformInterface(); ImGui_ImplOpenGL3_DestroyDeviceObjects(); } @@ -279,12 +290,12 @@ static void ImGui_ImplOpenGL3_SetupRenderState(ImDrawData* draw_data, int fb_wid if (!clip_origin_lower_left) { float tmp = T; T = B; B = tmp; } // Swap top and bottom if origin is upper left #endif const float ortho_projection[4][4] = - { - { 2.0f/(R-L), 0.0f, 0.0f, 0.0f }, - { 0.0f, 2.0f/(T-B), 0.0f, 0.0f }, - { 0.0f, 0.0f, -1.0f, 0.0f }, - { (R+L)/(L-R), (T+B)/(B-T), 0.0f, 1.0f }, - }; + { + { 2.0f/(R-L), 0.0f, 0.0f, 0.0f }, + { 0.0f, 2.0f/(T-B), 0.0f, 0.0f }, + { 0.0f, 0.0f, -1.0f, 0.0f }, + { (R+L)/(L-R), (T+B)/(B-T), 0.0f, 1.0f }, + }; glUseProgram(g_ShaderHandle); glUniform1i(g_AttribLocationTex, 0); glUniformMatrix4fv(g_AttribLocationProjMtx, 1, GL_FALSE, &ortho_projection[0][0]); @@ -408,7 +419,7 @@ void ImGui_ImplOpenGL3_RenderDrawData(ImDrawData* draw_data) glDrawElementsBaseVertex(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx)), (GLint)pcmd->VtxOffset); else #endif - glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx))); + glDrawElements(GL_TRIANGLES, (GLsizei)pcmd->ElemCount, sizeof(ImDrawIdx) == 2 ? GL_UNSIGNED_SHORT : GL_UNSIGNED_INT, (void*)(intptr_t)(pcmd->IdxOffset * sizeof(ImDrawIdx))); } } } @@ -541,104 +552,104 @@ bool ImGui_ImplOpenGL3_CreateDeviceObjects() sscanf(g_GlslVersionString, "#version %d", &glsl_version); const GLchar* vertex_shader_glsl_120 = - "uniform mat4 ProjMtx;\n" - "attribute vec2 Position;\n" - "attribute vec2 UV;\n" - "attribute vec4 Color;\n" - "varying vec2 Frag_UV;\n" - "varying vec4 Frag_Color;\n" - "void main()\n" - "{\n" - " Frag_UV = UV;\n" - " Frag_Color = Color;\n" - " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" - "}\n"; + "uniform mat4 ProjMtx;\n" + "attribute vec2 Position;\n" + "attribute vec2 UV;\n" + "attribute vec4 Color;\n" + "varying vec2 Frag_UV;\n" + "varying vec4 Frag_Color;\n" + "void main()\n" + "{\n" + " Frag_UV = UV;\n" + " Frag_Color = Color;\n" + " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" + "}\n"; const GLchar* vertex_shader_glsl_130 = - "uniform mat4 ProjMtx;\n" - "in vec2 Position;\n" - "in vec2 UV;\n" - "in vec4 Color;\n" - "out vec2 Frag_UV;\n" - "out vec4 Frag_Color;\n" - "void main()\n" - "{\n" - " Frag_UV = UV;\n" - " Frag_Color = Color;\n" - " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" - "}\n"; + "uniform mat4 ProjMtx;\n" + "in vec2 Position;\n" + "in vec2 UV;\n" + "in vec4 Color;\n" + "out vec2 Frag_UV;\n" + "out vec4 Frag_Color;\n" + "void main()\n" + "{\n" + " Frag_UV = UV;\n" + " Frag_Color = Color;\n" + " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" + "}\n"; const GLchar* vertex_shader_glsl_300_es = - "precision mediump float;\n" - "layout (location = 0) in vec2 Position;\n" - "layout (location = 1) in vec2 UV;\n" - "layout (location = 2) in vec4 Color;\n" - "uniform mat4 ProjMtx;\n" - "out vec2 Frag_UV;\n" - "out vec4 Frag_Color;\n" - "void main()\n" - "{\n" - " Frag_UV = UV;\n" - " Frag_Color = Color;\n" - " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" - "}\n"; + "precision mediump float;\n" + "layout (location = 0) in vec2 Position;\n" + "layout (location = 1) in vec2 UV;\n" + "layout (location = 2) in vec4 Color;\n" + "uniform mat4 ProjMtx;\n" + "out vec2 Frag_UV;\n" + "out vec4 Frag_Color;\n" + "void main()\n" + "{\n" + " Frag_UV = UV;\n" + " Frag_Color = Color;\n" + " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" + "}\n"; const GLchar* vertex_shader_glsl_410_core = - "layout (location = 0) in vec2 Position;\n" - "layout (location = 1) in vec2 UV;\n" - "layout (location = 2) in vec4 Color;\n" - "uniform mat4 ProjMtx;\n" - "out vec2 Frag_UV;\n" - "out vec4 Frag_Color;\n" - "void main()\n" - "{\n" - " Frag_UV = UV;\n" - " Frag_Color = Color;\n" - " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" - "}\n"; + "layout (location = 0) in vec2 Position;\n" + "layout (location = 1) in vec2 UV;\n" + "layout (location = 2) in vec4 Color;\n" + "uniform mat4 ProjMtx;\n" + "out vec2 Frag_UV;\n" + "out vec4 Frag_Color;\n" + "void main()\n" + "{\n" + " Frag_UV = UV;\n" + " Frag_Color = Color;\n" + " gl_Position = ProjMtx * vec4(Position.xy,0,1);\n" + "}\n"; const GLchar* fragment_shader_glsl_120 = - "#ifdef GL_ES\n" - " precision mediump float;\n" - "#endif\n" - "uniform sampler2D Texture;\n" - "varying vec2 Frag_UV;\n" - "varying vec4 Frag_Color;\n" - "void main()\n" - "{\n" - " gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV.st);\n" - "}\n"; + "#ifdef GL_ES\n" + " precision mediump float;\n" + "#endif\n" + "uniform sampler2D Texture;\n" + "varying vec2 Frag_UV;\n" + "varying vec4 Frag_Color;\n" + "void main()\n" + "{\n" + " gl_FragColor = Frag_Color * texture2D(Texture, Frag_UV.st);\n" + "}\n"; const GLchar* fragment_shader_glsl_130 = - "uniform sampler2D Texture;\n" - "in vec2 Frag_UV;\n" - "in vec4 Frag_Color;\n" - "out vec4 Out_Color;\n" - "void main()\n" - "{\n" - " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" - "}\n"; + "uniform sampler2D Texture;\n" + "in vec2 Frag_UV;\n" + "in vec4 Frag_Color;\n" + "out vec4 Out_Color;\n" + "void main()\n" + "{\n" + " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" + "}\n"; const GLchar* fragment_shader_glsl_300_es = - "precision mediump float;\n" - "uniform sampler2D Texture;\n" - "in vec2 Frag_UV;\n" - "in vec4 Frag_Color;\n" - "layout (location = 0) out vec4 Out_Color;\n" - "void main()\n" - "{\n" - " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" - "}\n"; + "precision mediump float;\n" + "uniform sampler2D Texture;\n" + "in vec2 Frag_UV;\n" + "in vec4 Frag_Color;\n" + "layout (location = 0) out vec4 Out_Color;\n" + "void main()\n" + "{\n" + " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" + "}\n"; const GLchar* fragment_shader_glsl_410_core = - "in vec2 Frag_UV;\n" - "in vec4 Frag_Color;\n" - "uniform sampler2D Texture;\n" - "layout (location = 0) out vec4 Out_Color;\n" - "void main()\n" - "{\n" - " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" - "}\n"; + "in vec2 Frag_UV;\n" + "in vec4 Frag_Color;\n" + "uniform sampler2D Texture;\n" + "layout (location = 0) out vec4 Out_Color;\n" + "void main()\n" + "{\n" + " Out_Color = Frag_Color * texture(Texture, Frag_UV.st);\n" + "}\n"; // Select shaders matching our GLSL versions const GLchar* vertex_shader = NULL; @@ -717,3 +728,31 @@ void ImGui_ImplOpenGL3_DestroyDeviceObjects() ImGui_ImplOpenGL3_DestroyFontsTexture(); } + +//-------------------------------------------------------------------------------------------------------- +// MULTI-VIEWPORT / PLATFORM INTERFACE SUPPORT +// This is an _advanced_ and _optional_ feature, allowing the backend to create and handle multiple viewports simultaneously. +// If you are new to dear imgui or creating a new binding for dear imgui, it is recommended that you completely ignore this section first.. +//-------------------------------------------------------------------------------------------------------- + +static void ImGui_ImplOpenGL3_RenderWindow(ImGuiViewport* viewport, void*) +{ + if (!(viewport->Flags & ImGuiViewportFlags_NoRendererClear)) + { + ImVec4 clear_color = ImVec4(0.0f, 0.0f, 0.0f, 1.0f); + glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w); + glClear(GL_COLOR_BUFFER_BIT); + } + ImGui_ImplOpenGL3_RenderDrawData(viewport->DrawData); +} + +static void ImGui_ImplOpenGL3_InitPlatformInterface() +{ + ImGuiPlatformIO& platform_io = ImGui::GetPlatformIO(); + platform_io.Renderer_RenderWindow = ImGui_ImplOpenGL3_RenderWindow; +} + +static void ImGui_ImplOpenGL3_ShutdownPlatformInterface() +{ + ImGui::DestroyPlatformWindows(); +} \ No newline at end of file