139 lines
5.0 KiB
C
139 lines
5.0 KiB
C
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/*
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* Copyright 2011 Google Inc.
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*
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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#ifndef GrGLConfig_DEFINED
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#define GrGLConfig_DEFINED
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#include "GrTypes.h"
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/**
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* Optional GL config file.
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*/
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#ifdef GR_GL_CUSTOM_SETUP_HEADER
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#include GR_GL_CUSTOM_SETUP_HEADER
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#endif
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#if !defined(GR_GL_FUNCTION_TYPE)
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#define GR_GL_FUNCTION_TYPE
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#endif
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/**
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* The following are optional defines that can be enabled at the compiler
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* command line, in a IDE project, in a GrUserConfig.h file, or in a GL custom
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* file (if one is in use). If a GR_GL_CUSTOM_SETUP_HEADER is used they can
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* also be placed there.
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*
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* GR_GL_LOG_CALLS: if 1 Gr can print every GL call using SkDebugf. Defaults to
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* 0. Logging can be enabled and disabled at runtime using a debugger via to
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* global gLogCallsGL. The initial value of gLogCallsGL is controlled by
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* GR_GL_LOG_CALLS_START.
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*
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* GR_GL_LOG_CALLS_START: controls the initial value of gLogCallsGL when
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* GR_GL_LOG_CALLS is 1. Defaults to 0.
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*
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* GR_GL_CHECK_ERROR: if enabled Gr can do a glGetError() after every GL call.
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* Defaults to 1 if SK_DEBUG is set, otherwise 0. When GR_GL_CHECK_ERROR is 1
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* this can be toggled in a debugger using the gCheckErrorGL global. The initial
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* value of gCheckErrorGL is controlled by by GR_GL_CHECK_ERROR_START.
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*
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* GR_GL_CHECK_ERROR_START: controls the initial value of gCheckErrorGL
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* when GR_GL_CHECK_ERROR is 1. Defaults to 1.
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*
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* GR_GL_USE_BUFFER_DATA_NULL_HINT: When specifing new data for a vertex/index
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* buffer that replaces old data Ganesh can give a hint to the driver that the
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* previous data will not be used in future draws like this:
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* glBufferData(GL_..._BUFFER, size, NULL, usage); //<--hint, NULL means
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* glBufferSubData(GL_..._BUFFER, 0, lessThanSize, data) // old data can't be
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* // used again.
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* However, this can be an unoptimization on some platforms, esp. Chrome.
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* Chrome's cmd buffer will create a new allocation and memset the whole thing
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* to zero (for security reasons). Defaults to 1 (enabled).
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*
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* GR_GL_PER_GL_FUNC_CALLBACK: When set to 1 the GrGLInterface object provides
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* a function pointer that is called just before every gl function. The ptr must
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* be valid (i.e. there is no NULL check). However, by default the callback will
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* be set to a function that does nothing. The signature of the function is:
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* void function(const GrGLInterface*)
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* It is not extern "C".
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* The GrGLInterface field fCallback specifies the function ptr and there is an
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* additional field fCallbackData of type intptr_t for client data.
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*
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* GR_GL_CHECK_ALLOC_WITH_GET_ERROR: If set to 1 this will then glTexImage,
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* glBufferData, glRenderbufferStorage, etc will be checked for errors. This
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* amounts to ensuring the error is GL_NO_ERROR, calling the allocating
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* function, and then checking that the error is still GL_NO_ERROR. When the
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* value is 0 we will assume no error was generated without checking.
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*
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* GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT: We will normally check the FBO status
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* every time we bind a texture or renderbuffer to an FBO. However, in some
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* environments CheckFrameBufferStatus is very expensive. If this is set we will
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* check the first time we use a color format or a combination of color /
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* stencil formats as attachments. If the FBO is complete we will assume
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* subsequent attachments with the same formats are complete as well.
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*
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* GR_GL_MUST_USE_VBO: Indicates that all vertices and indices must be rendered
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* from VBOs. Chromium's command buffer doesn't allow glVertexAttribArray with
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* ARARY_BUFFER 0 bound or glDrawElements with ELEMENT_ARRAY_BUFFER 0 bound.
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*
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* GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE is for compatibility with the new version
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* of the OpenGLES2.0 headers from Khronos. glShaderSource now takes a const char * const *,
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* instead of a const char
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*/
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#if !defined(GR_GL_LOG_CALLS)
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#ifdef SK_DEBUG
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#define GR_GL_LOG_CALLS 1
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#else
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#define GR_GL_LOG_CALLS 0
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#endif
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#endif
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#if !defined(GR_GL_LOG_CALLS_START)
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#define GR_GL_LOG_CALLS_START 0
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#endif
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#if !defined(GR_GL_CHECK_ERROR)
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#ifdef SK_DEBUG
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#define GR_GL_CHECK_ERROR 1
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#else
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#define GR_GL_CHECK_ERROR 0
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#endif
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#endif
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#if !defined(GR_GL_CHECK_ERROR_START)
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#define GR_GL_CHECK_ERROR_START 1
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#endif
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#if !defined(GR_GL_USE_BUFFER_DATA_NULL_HINT)
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#define GR_GL_USE_BUFFER_DATA_NULL_HINT 1
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#endif
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#if !defined(GR_GL_PER_GL_FUNC_CALLBACK)
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#define GR_GL_PER_GL_FUNC_CALLBACK 0
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#endif
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#if !defined(GR_GL_CHECK_ALLOC_WITH_GET_ERROR)
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#define GR_GL_CHECK_ALLOC_WITH_GET_ERROR 1
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#endif
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#if !defined(GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT)
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#define GR_GL_CHECK_FBO_STATUS_ONCE_PER_FORMAT 0
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#endif
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#if !defined(GR_GL_MUST_USE_VBO)
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#define GR_GL_MUST_USE_VBO 0
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#endif
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#if !defined(GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE)
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#define GR_GL_USE_NEW_SHADER_SOURCE_SIGNATURE 0
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#endif
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#endif
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