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[OpenGL] Default and limit GLSL version to 1.20 if OpenGL < 3.0. Not using anything fancy for now anyway.
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@ -184,7 +184,7 @@ static bool ImGui_ImplOpenGL3_CreateDeviceObjects()
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glGetIntegerv(GL_VERTEX_ARRAY_BINDING, &last_vertex_array);
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// Parse GLSL version string
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int glsl_version = 130;
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int glsl_version = 120;
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sscanf(g_GlslVersionString, "#version %d", &glsl_version);
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const GLchar* vertex_shader_glsl_120 =
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@ -422,12 +422,14 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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if (!g_IsGLES) {
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// Not GL ES
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glsl_version = "#version 130";
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glsl_version = "#version 120";
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g_GlVersion = major * 100 + minor * 10;
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if (major >= 4 && minor >= 1)
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glsl_version = "#version 410";
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else if (major > 3 || (major == 3 && minor >= 2))
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glsl_version = "#version 150";
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else if (major == 3)
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glsl_version = "#version 130";
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else if (major < 2)
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glsl_version = "#version 100";
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} else {
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@ -443,7 +445,7 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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else if (g_GlVersion >= 300)
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glsl_version = "#version 300 es";
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else
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glsl_version = "#version 130";
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glsl_version = "#version 120";
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}
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// Setup back-end capabilities flags
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@ -456,7 +458,7 @@ bool ImGui_ImplOpenGL3_Init(const char* glsl_version)
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// Store GLSL version string so we can refer to it later in case we recreate shaders.
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// Note: GLSL version is NOT the same as GL version. Leave this to NULL if unsure.
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if (glsl_version == NULL)
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glsl_version = "#version 130";
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glsl_version = "#version 120";
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IM_ASSERT((int)strlen(glsl_version) + 2 < IM_ARRAYSIZE(g_GlslVersionString));
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strcpy(g_GlslVersionString, glsl_version);
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