mirror of https://github.com/axmolengine/axmol.git
194 lines
6.7 KiB
C
194 lines
6.7 KiB
C
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/*
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Copyright 2011 Google Inc.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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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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#include "GrGLDefines.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 GrPrintf. 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 GR_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_NO_CONSTANT_ATTRIBUTES: if this evaluates to true then the GL backend
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* will use uniforms instead of attributes in all cases when there is not
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* per-vertex data. This is important when the underlying GL implementation
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* doesn't actually support immediate style attribute values (e.g. when
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* the GL stream is converted to DX as in ANGLE on Chrome). Defaults to 0.
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*
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* GR_GL_ATTRIBUTE_MATRICES: If changing uniforms is very expensive it may be
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* faster to use vertex attributes for matrices (set via glVertexAttrib3fv).
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* Setting this build flag enables this behavior. GR_GL_NO_CONSTANT_ATTRIBUTES
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* must not be set since this uses constant attributes for the matrices.
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* Defaults to 0.
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*/
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#if !defined(GR_GL_LOG_CALLS)
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#define GR_GL_LOG_CALLS 0
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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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#define GR_GL_CHECK_ERROR GR_DEBUG
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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_NO_CONSTANT_ATTRIBUTES)
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#define GR_GL_NO_CONSTANT_ATTRIBUTES 0
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#endif
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#if !defined(GR_GL_ATTRIBUTE_MATRICES)
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#define GR_GL_ATTRIBUTE_MATRICES 0
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#endif
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#if(GR_GL_NO_CONSTANT_ATTRIBUTES) && (GR_GL_ATTRIBUTE_MATRICES)
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#error "Cannot combine GR_GL_NO_CONSTANT_ATTRIBUTES and GR_GL_ATTRIBUTE_MATRICES"
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#endif
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////////////////////////////////////////////////////////////////////////////////
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/**
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* The following macros are used to staticlly configure the default
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* GrGLInterface, but should not be used outside of the GrGLInterface
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* scaffolding. Undefine here to prevent accidental use.
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*/
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#undef GR_SUPPORT_GLDESKTOP
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#undef GR_SUPPORT_GLES1
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#undef GR_SUPPORT_GLES2
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#undef GR_SUPPORT_GLES
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////////////////////////////////////////////////////////////////////////////////
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#if GR_SCALAR_IS_FIXED
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#define GrGLType GL_FIXED
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#elif GR_SCALAR_IS_FLOAT
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#define GrGLType GR_GL_FLOAT
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#else
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#error "unknown GR_SCALAR type"
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#endif
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#if GR_TEXT_SCALAR_IS_USHORT
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#define GrGLTextType GR_GL_UNSIGNED_SHORT
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#define GR_GL_TEXT_TEXTURE_NORMALIZED 1
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#elif GR_TEXT_SCALAR_IS_FLOAT
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#define GrGLTextType GR_GL_FLOAT
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#define GR_GL_TEXT_TEXTURE_NORMALIZED 0
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#elif GR_TEXT_SCALAR_IS_FIXED
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#define GrGLTextType GR_GL_FIXED
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#define GR_GL_TEXT_TEXTURE_NORMALIZED 0
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#else
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#error "unknown GR_TEXT_SCALAR type"
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#endif
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// Pick a pixel config for 32bit bitmaps. Our default is GL_RGBA (except on
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// Windows where we match GDI's order).
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#ifndef GR_GL_32BPP_COLOR_FORMAT
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#if GR_WIN32_BUILD || GR_LINUX_BUILD || GR_QNX_BUILD
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#define GR_GL_32BPP_COLOR_FORMAT GR_GL_BGRA
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#else
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#define GR_GL_32BPP_COLOR_FORMAT GR_GL_RGBA
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#endif
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#endif
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////////////////////////////////////////////////////////////////////////////////
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extern void GrGLCheckErr(const char* location, const char* call);
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extern void GrGLClearErr();
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#if GR_GL_CHECK_ERROR
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extern bool gCheckErrorGL;
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#define GR_GL_CHECK_ERROR_IMPL(X) if (gCheckErrorGL) GrGLCheckErr(GR_FILE_AND_LINE_STR, #X)
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#else
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#define GR_GL_CHECK_ERROR_IMPL(X)
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#endif
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#if GR_GL_LOG_CALLS
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extern bool gLogCallsGL;
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#define GR_GL_LOG_CALLS_IMPL(X) if (gLogCallsGL) GrPrintf(GR_FILE_AND_LINE_STR "GL: " #X "\n")
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#else
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#define GR_GL_LOG_CALLS_IMPL(X)
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#endif
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#define GR_GL(X) GrGLGetGLInterface()->f##X;; GR_GL_LOG_CALLS_IMPL(X); GR_GL_CHECK_ERROR_IMPL(X);
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#define GR_GL_NO_ERR(X) GrGLGetGLInterface()->f##X;; GR_GL_LOG_CALLS_IMPL(X);
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#define GR_GL_SUPPORT_DESKTOP (kDesktop_GrGLBinding == GrGLGetGLInterface()->fBindingsExported)
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#define GR_GL_SUPPORT_ES1 (kES1_GrGLBinding == GrGLGetGLInterface()->fBindingsExported)
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#define GR_GL_SUPPORT_ES2 (kES2_GrGLBinding == GrGLGetGLInterface()->fBindingsExported)
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#define GR_GL_SUPPORT_ES (GR_GL_SUPPORT_ES1 || GR_GL_SUPPORT_ES2)
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////////////////////////////////////////////////////////////////////////////////
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/**
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* GrGLRestoreResetRowLength() will reset GL_UNPACK_ROW_LENGTH to 0. We write
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* this wrapper, since GL_UNPACK_ROW_LENGTH is not available on all GL versions
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*/
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extern void GrGLRestoreResetRowLength();
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////////////////////////////////////////////////////////////////////////////////
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/**
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* Some drivers want the var-int arg to be zero-initialized on input.
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*/
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#define GR_GL_INIT_ZERO 0
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#define GR_GL_GetIntegerv(e, p) \
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do { \
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*(p) = GR_GL_INIT_ZERO; \
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GR_GL(GetIntegerv(e, p)); \
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} while (0)
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////////////////////////////////////////////////////////////////////////////////
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#endif
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