2010-12-23 00:39:39 +03:00
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/*
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Copyright 2010 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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#if GR_WIN32_BUILD
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// glew has to be included before gl
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#define GR_INCLUDE_GLDESKTOP <GL/glew.h>
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#define GR_INCLUDE_GLDESKTOPext <GL/gl.h>
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#define GR_GL_FUNC __stdcall
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// undo stupid windows defines
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#undef near
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#undef far
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#elif GR_MAC_BUILD
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#define GR_INCLUDE_GLDESKTOP <OpenGL/gl.h>
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#define GR_INCLUDE_GLDESKTOPext <OpenGL/glext.h>
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#define GR_GL_FUNC
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#elif GR_IOS_BUILD
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#define GR_INCLUDE_GLES1 <OpenGLES/ES1/gl.h>
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#define GR_INCLUDE_GLES1ext <OpenGLES/ES1/glext.h>
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#define GR_INCLUDE_GLES2 <OpenGLES/ES2/gl.h>
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#define GR_INCLUDE_GLES2ext <OpenGLES/ES2/glext.h>
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#define GR_GL_FUNC
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#elif GR_ANDROID_BUILD
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#ifndef GL_GLEXT_PROTOTYPES
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#define GL_GLEXT_PROTOTYPES
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#endif
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#define GR_INCLUDE_GLES2 <GLES2/gl2.h>
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#define GR_INCLUDE_GLES2ext <GLES2/gl2ext.h>
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#define GR_GL_FUNC
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#elif GR_LINUX_BUILD
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// need to distinguish between ES and Deskop versions for linux
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#ifndef GL_GLEXT_PROTOTYPES
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#define GL_GLEXT_PROTOTYPES
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#endif
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2010-12-23 23:20:51 +03:00
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#define GR_INCLUDE_GLDESKTOP <GL/gl.h>
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#define GR_INCLUDE_GLDESKTOPext <GL/glext.h>
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// #define GR_INCLUDE_GLES1 <GLES/gl.h>
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// #define GR_INCLUDE_GLES1ext <GLES/glext.h>
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// #define GR_INCLUDE_GLES2 <GLES2/gl2.h>
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// #define GR_INCLUDE_GLES2ext <GLES2/gl2ext.h>
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2010-12-23 00:39:39 +03:00
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#define GR_GL_FUNC
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#elif GR_QNX_BUILD
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#ifndef GL_GLEXT_PROTOTYPES
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#define GL_GLEXT_PROTOTYPES
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#endif
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// This is needed by the QNX GLES2 headers
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#define GL_API_EXT
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#define GR_INCLUDE_GLES2 <GLES2/gl2.h>
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#define GR_INCLUDE_GLES2ext <GLES2/gl2ext.h>
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#define GR_INCLUDE_EGL <EGL/egl.h>
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#define GR_GL_FUNC
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#else
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#error "unsupported GR_???_BUILD"
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#endif
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// Ensure we're at least defined
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//
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#ifndef GR_SUPPORT_GLES1
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#if defined(GR_INCLUDE_GLES1)
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#define GR_SUPPORT_GLES1 1
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#else
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#define GR_SUPPORT_GLES1 0
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#endif
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#endif
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#ifndef GR_SUPPORT_GLES2
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#if defined(GR_INCLUDE_GLES2)
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#define GR_SUPPORT_GLES2 1
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#else
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#define GR_SUPPORT_GLES2 0
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#endif
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#endif
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#ifndef GR_SUPPORT_GLDESKTOP
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#if defined(GR_INCLUDE_GLDESKTOP)
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#define GR_SUPPORT_GLDESKTOP 1
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#else
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#define GR_SUPPORT_GLDESKTOP 0
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#endif
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#endif
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#ifndef GR_SUPPORT_EGL
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#if defined(GR_INCLUDE_EGL)
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#define GR_SUPPORT_EGL 1
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#else
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#define GR_SUPPORT_EGL 0
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#endif
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#endif
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// Filter the includes based on what we support
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//
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#if !GR_SUPPORT_GLES1
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#undef GR_INCLUDE_GLES1
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#undef GR_INCLUDE_GLES1ext
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#endif
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#if !GR_SUPPORT_GLES2
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#undef GR_INCLUDE_GLES2
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#undef GR_INCLUDE_GLES2ext
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#endif
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#if !GR_SUPPORT_GLDESKTOP
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#undef GR_INCLUDE_GLDESKTOP
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#undef GR_INCLUDE_GLDESKTOPext
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#endif
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#if !GR_SUPPORT_EGL
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#undef GR_INCLUDE_EGL
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#endif
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// Begin including GL headers
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//
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#ifdef GR_INCLUDE_GLES1
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#include GR_INCLUDE_GLES1
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#endif
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#ifdef GR_INCLUDE_GLES1ext
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#include GR_INCLUDE_GLES1ext
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#endif
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#ifdef GR_INCLUDE_GLES2
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#include GR_INCLUDE_GLES2
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#endif
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#ifdef GR_INCLUDE_GLES2ext
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#include GR_INCLUDE_GLES2ext
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#endif
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#ifdef GR_INCLUDE_GLDESKTOP
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#include GR_INCLUDE_GLDESKTOP
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#endif
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#ifdef GR_INCLUDE_GLDESKTOPext
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#include GR_INCLUDE_GLDESKTOPext
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#endif
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#ifdef GR_INCLUDE_EGL
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#include GR_INCLUDE_EGL
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#endif
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//
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// End including GL headers
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#if GL_VERSION_1_1
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#define GR_GL_DESKTOP 1
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#define GR_GL_ES 0
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#else
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#ifndef GL_ES_VERSION_2_0
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GR_STATIC_ASSERT(GL_VERSION_ES_CM_1_0 ||
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GL_VERSION_ES_CL_1_0 ||
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GL_VERSION_ES_CM_1_1 ||
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GL_VERSION_ES_CL_1_1);
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#endif
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#define GR_GL_DESKTOP 0
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#define GR_GL_ES 1
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#endif
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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 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 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 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 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
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#ifndef SK_GL_32BPP_COLOR_FORMAT
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#define SK_GL_32BPP_COLOR_FORMAT GL_RGBA
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#endif
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////////////////////////////////////////////////////////////////////////////////
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// setup for opengl ES/desktop extensions
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// we make a struct of function pointers so that each GL context
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// can have it's own struct. (Some environments may have different proc
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// addresses for different contexts).
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extern "C" {
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struct GrGLExts {
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// FBO
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GLvoid (GR_GL_FUNC *GenFramebuffers)(GLsizei n, GLuint *framebuffers);
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GLvoid (GR_GL_FUNC *BindFramebuffer)(GLenum target, GLuint framebuffer);
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GLvoid (GR_GL_FUNC *FramebufferTexture2D)(GLenum target, GLenum attachment,
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GLenum textarget, GLuint texture,
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GLint level);
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GLenum (GR_GL_FUNC *CheckFramebufferStatus)(GLenum target);
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GLvoid (GR_GL_FUNC *DeleteFramebuffers)(GLsizei n, const
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GLuint *framebuffers);
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GLvoid (GR_GL_FUNC *RenderbufferStorage)(GLenum target,
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GLenum internalformat,
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GLsizei width, GLsizei height);
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GLvoid (GR_GL_FUNC *GenRenderbuffers)(GLsizei n, GLuint *renderbuffers);
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GLvoid (GR_GL_FUNC *DeleteRenderbuffers)(GLsizei n,
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const GLuint *renderbuffers);
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GLvoid (GR_GL_FUNC *FramebufferRenderbuffer)(GLenum target,
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GLenum attachment,
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GLenum renderbuffertarget,
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GLuint renderbuffer);
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GLvoid (GR_GL_FUNC *BindRenderbuffer)(GLenum target, GLuint renderbuffer);
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// Multisampling
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// same prototype for ARB_FBO, EXT_FBO, GL 3.0, & Apple ES extension
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GLvoid (GR_GL_FUNC *RenderbufferStorageMultisample)(GLenum target,
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GLsizei samples,
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GLenum internalformat,
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GLsizei width,
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GLsizei height);
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// desktop: ext_fbo_blit, arb_fbo, gl 3.0
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GLvoid (GR_GL_FUNC *BlitFramebuffer)(GLint srcX0, GLint srcY0,
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GLint srcX1, GLint srcY1,
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GLint dstX0, GLint dstY0,
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GLint dstX1, GLint dstY1,
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GLbitfield mask, GLenum filter);
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// apple's es extension
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GLvoid (GR_GL_FUNC *ResolveMultisampleFramebuffer)();
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// IMG'e es extension
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GLvoid (GR_GL_FUNC *FramebufferTexture2DMultisample)(GLenum target,
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GLenum attachment,
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GLenum textarget,
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GLuint texture,
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GLint level,
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GLsizei samples);
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// Buffer mapping (extension in ES).
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GLvoid* (GR_GL_FUNC *MapBuffer)(GLenum target, GLenum access);
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GLboolean (GR_GL_FUNC *UnmapBuffer)(GLenum target);
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};
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}
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// FBO
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#define GR_FRAMEBUFFER 0x8D40
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#define GR_FRAMEBUFFER_COMPLETE 0x8CD5
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#define GR_COLOR_ATTACHMENT0 0x8CE0
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#define GR_FRAMEBUFFER_BINDING 0x8CA6
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#define GR_RENDERBUFFER 0x8D41
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#define GR_STENCIL_ATTACHMENT 0x8D20
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#define GR_STENCIL_INDEX8 0x8D48
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#define GR_STENCIL_INDEX16 0x8D49
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#define GR_MAX_RENDERBUFFER_SIZE 0x84E8
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#define GR_DEPTH_STENCIL_ATTACHMENT 0x821A
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#define GR_UNSIGNED_INT_24_8 0x84FA
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#define GR_DEPTH_STENCIL 0x84F9
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#define GR_RGBA8 0x8058
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#define GR_RGB565 0x8D62
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// Multisampling
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// IMG MAX_SAMPLES uses a different value than desktop, Apple ES extension.
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#define GR_MAX_SAMPLES 0x8D57
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#define GR_MAX_SAMPLES_IMG 0x9135
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#define GR_READ_FRAMEBUFFER 0x8CA8
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#define GR_DRAW_FRAMEBUFFER 0x8CA9
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// Buffer mapping
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#define GR_WRITE_ONLY 0x88B9
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#define GR_BUFFER_MAPPED 0x88BC
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// Palette texture
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#define GR_PALETTE8_RGBA8 0x8B91
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extern void GrGLInitExtensions(GrGLExts* exts);
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////////////////////////////////////////////////////////////////////////////////
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extern void GrGLCheckErr(const char* location, const char* call);
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static inline void GrGLClearErr() {
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while (GL_NO_ERROR != glGetError()) {}
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}
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// GR_FORCE_GLCHECKERR can be defined by GrUserConfig.h
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#if defined(GR_FORCE_GLCHECKERR)
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#define GR_LOCAL_CALL_CHECKERR GR_FORCE_GLCHECKERR
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#else
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#define GR_LOCAL_CALL_CHECKERR GR_DEBUG
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#endif
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static inline void GrDebugGLCheckErr(const char* location, const char* call) {
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#if GR_LOCAL_CALL_CHECKERR
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GrGLCheckErr(location, call);
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#endif
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}
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#undef GR_LOCAL_CALL_CHECKERR
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#if GR_GL_LOG_CALLS
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extern bool gPrintGL;
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#define GR_GL(X) gl ## X; GrDebugGLCheckErr(GR_FILE_AND_LINE_STR, #X); if (gPrintGL) GrPrintf(GR_FILE_AND_LINE_STR "GL: " #X "\n")
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#define GR_GL_NO_ERR(X) GrGLClearErr(); gl ## X; if (gPrintGL) GrPrintf(GR_FILE_AND_LINE_STR "GL: " #X "\n")
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#define GR_GLEXT(exts, X) exts. X; GrDebugGLCheckErr(GR_FILE_AND_LINE_STR, #X); if (gPrintGL) GrPrintf(GR_FILE_AND_LINE_STR "GL: " #X "\n")
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#define GR_GLEXT_NO_ERR(exts, X) GrGLClearErr(); exts. X; if (gPrintGL) GrPrintf(GR_FILE_AND_LINE_STR "GL: " #X "\n")
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#else
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#define GR_GL(X) gl ## X; GrDebugGLCheckErr(GR_FILE_AND_LINE_STR, #X)
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#define GR_GL_NO_ERR(X) GrGLClearErr(); gl ## X
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#define GR_GLEXT(exts, X) exts. X; GrDebugGLCheckErr(GR_FILE_AND_LINE_STR, #X)
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#define GR_GLEXT_NO_ERR(exts, X) GrGLClearErr(); exts. X
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#endif
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#endif
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