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Replace GL_ARB_debug_output in context guide
New code should use GL_KHR_debug instead but it's not as good an example to use in this case as the symbols it adds has no suffixes.
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@ -138,9 +138,9 @@ as extensions until they become obsolete.
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An extension is defined by:
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- An extension name (e.g. `GL_ARB_debug_output`)
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- New OpenGL tokens (e.g. `GL_DEBUG_SEVERITY_HIGH_ARB`)
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- New OpenGL functions (e.g. `glGetDebugMessageLogARB`)
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- An extension name (e.g. `GL_ARB_gl_spirv`)
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- New OpenGL tokens (e.g. `GL_SPIR_V_BINARY_ARB`)
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- New OpenGL functions (e.g. `glSpecializeShaderARB`)
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Note the `ARB` affix, which stands for Architecture Review Board and is used
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for official extensions. The extension above was created by the ARB, but there
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@ -225,9 +225,9 @@ To check whether a specific extension is supported, use the `GLAD_GL_xxx`
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booleans.
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@code
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if (GLAD_GL_ARB_debug_output)
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if (GLAD_GL_ARB_gl_spirv)
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{
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// Use GL_ARB_debug_output
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// Use GL_ARB_gl_spirv
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}
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@endcode
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@ -259,8 +259,8 @@ included in your development environment may be several years out of date and
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may not include the extensions you wish to use.
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The header defines function pointer types for all functions of all extensions it
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supports. These have names like `PFNGLGETDEBUGMESSAGELOGARBPROC` (for
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`glGetDebugMessageLogARB`), i.e. the name is made uppercase and `PFN` (pointer
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supports. These have names like `PFNGLSPECIALIZESHADERARBPROC` (for
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`glSpecializeShaderARB`), i.e. the name is made uppercase and `PFN` (pointer
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to function) and `PROC` (procedure) are added to the ends.
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To include the extension header, define @ref GLFW_INCLUDE_GLEXT before including
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@ -280,7 +280,7 @@ is necessary to check at run-time whether the context supports the extension.
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This is done with @ref glfwExtensionSupported.
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@code
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if (glfwExtensionSupported("GL_ARB_debug_output"))
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if (glfwExtensionSupported("GL_ARB_gl_spirv"))
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{
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// The extension is supported by the current context
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}
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@ -299,7 +299,7 @@ your operating system, making it necessary to fetch them at run time. You can
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retrieve pointers to these functions with @ref glfwGetProcAddress.
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@code
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PFNGLGETDEBUGMESSAGELOGARBPROC pfnGetDebugMessageLog = glfwGetProcAddress("glGetDebugMessageLogARB");
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PFNGLSPECIALIZESHADERARBPROC pfnSpecializeShaderARB = glfwGetProcAddress("glSpecializeShaderARB");
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@endcode
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In general, you should avoid giving the function pointer variables the (exact)
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@ -313,28 +313,28 @@ when used together.
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#define GLFW_INCLUDE_GLEXT
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#include <GLFW/glfw3.h>
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#define glGetDebugMessageLogARB pfnGetDebugMessageLog
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PFNGLGETDEBUGMESSAGELOGARBPROC pfnGetDebugMessageLog;
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#define glSpecializeShaderARB pfnSpecializeShaderARB
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PFNGLSPECIALIZESHADERARBPROC pfnSpecializeShaderARB;
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// Flag indicating whether the extension is supported
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int has_ARB_debug_output = 0;
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int has_ARB_gl_spirv = 0;
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void load_extensions(void)
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{
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if (glfwExtensionSupported("GL_ARB_debug_output"))
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if (glfwExtensionSupported("GL_ARB_gl_spirv"))
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{
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pfnGetDebugMessageLog = (PFNGLGETDEBUGMESSAGELOGARBPROC)
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glfwGetProcAddress("glGetDebugMessageLogARB");
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has_ARB_debug_output = 1;
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pfnSpecializeShaderARB = (PFNGLSPECIALIZESHADERARBPROC)
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glfwGetProcAddress("glSpecializeShaderARB");
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has_ARB_gl_spirv = 1;
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}
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}
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void some_function(void)
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{
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if (has_ARB_debug_output)
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if (has_ARB_gl_spirv)
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{
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// Now the extension function can be called as usual
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glGetDebugMessageLogARB(...);
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glSpecializeShaderARB(...);
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}
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}
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@endcode
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