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Support APPLE VAO extension on Mac.

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Since Mac lacks a compatibility profile, we often use the highest
supported compatible version, 2.1; this lacks vertex-array-object (VAO)
support in the API, but Apple provide a compatible extension. Extend
the helper object to detect this case and make VAO support work.

Change-Id: I75a74e048a0d188cec76bc5a4a9eafa4c9143740
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>
This commit is contained in:
James Turner 2013-10-15 18:32:02 +01:00 committed by The Qt Project
parent b271ddebfc
commit 42c8c7e9db
1 changed files with 27 additions and 13 deletions
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40
src/gui/opengl/qopenglvertexarrayobject.cpp
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@ -58,9 +58,15 @@ public:
{
Q_ASSERT(context);
#if !defined(QT_OPENGL_ES_2)
GenVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , GLuint *)>(context->getProcAddress("glGenVertexArrays"));
DeleteVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , const GLuint *)>(context->getProcAddress("glDeleteVertexArrays"));
BindVertexArray = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint )>(context->getProcAddress("glBindVertexArray"));
if (context->hasExtension(QByteArrayLiteral("GL_APPLE_vertex_array_object"))) {
GenVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , GLuint *)>(context->getProcAddress(QByteArrayLiteral("glGenVertexArraysAPPLE")));
DeleteVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , const GLuint *)>(context->getProcAddress(QByteArrayLiteral("glDeleteVertexArraysAPPLE")));
BindVertexArray = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint )>(context->getProcAddress(QByteArrayLiteral("glBindVertexArrayAPPLE")));
} else {
GenVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , GLuint *)>(context->getProcAddress("glGenVertexArrays"));
DeleteVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , const GLuint *)>(context->getProcAddress("glDeleteVertexArrays"));
BindVertexArray = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLuint )>(context->getProcAddress("glBindVertexArray"));
}
#else
GenVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , GLuint *)>(context->getProcAddress("glGenVertexArraysOES"));
DeleteVertexArrays = reinterpret_cast<void (QOPENGLF_APIENTRYP)(GLsizei , const GLuint *)>(context->getProcAddress("glDeleteVertexArraysOES"));
@ -84,7 +90,7 @@ public:
}
private:
// Function signatures are equivalent between desktop core, ARB and ES 2 extensions
// Function signatures are equivalent between desktop core, ARB, APPLE and ES 2 extensions
void (QOPENGLF_APIENTRYP GenVertexArrays)(GLsizei n, GLuint *arrays);
void (QOPENGLF_APIENTRYP DeleteVertexArrays)(GLsizei n, const GLuint *arrays);
void (QOPENGLF_APIENTRYP BindVertexArray)(GLuint array);
@ -109,8 +115,8 @@ public:
#if defined(QT_OPENGL_ES_2)
delete vaoFuncs;
#else
if (vaoFuncsType == ARB)
delete vaoFuncs.arb;
if ((vaoFuncsType == ARB) || (vaoFuncsType == APPLE))
delete vaoFuncs.helper;
#endif
}
@ -130,13 +136,14 @@ public:
union {
QOpenGLFunctions_3_0 *core_3_0;
QOpenGLFunctions_3_2_Core *core_3_2;
QVertexArrayObjectHelper *arb;
QVertexArrayObjectHelper *helper;
} vaoFuncs;
enum {
NotSupported,
Core_3_0,
Core_3_2,
ARB
ARB,
APPLE
} vaoFuncsType;
#endif
QOpenGLContext *context;
@ -181,9 +188,13 @@ bool QOpenGLVertexArrayObjectPrivate::create()
vaoFuncs.core_3_0->initializeOpenGLFunctions();
vaoFuncs.core_3_0->glGenVertexArrays(1, &vao);
} else if (ctx->hasExtension("GL_ARB_vertex_array_object")) {
vaoFuncs.arb = new QVertexArrayObjectHelper(ctx);
vaoFuncs.helper = new QVertexArrayObjectHelper(ctx);
vaoFuncsType = ARB;
vaoFuncs.arb->glGenVertexArrays(1, &vao);
vaoFuncs.helper->glGenVertexArrays(1, &vao);
} else if (ctx->hasExtension(QByteArrayLiteral("GL_APPLE_vertex_array_object"))) {
vaoFuncs.helper = new QVertexArrayObjectHelper(ctx);
vaoFuncsType = APPLE;
vaoFuncs.helper->glGenVertexArrays(1, &vao);
}
#endif
return (vao != 0);
@ -205,7 +216,8 @@ void QOpenGLVertexArrayObjectPrivate::destroy()
vaoFuncs.core_3_0->glDeleteVertexArrays(1, &vao);
break;
case ARB:
vaoFuncs.arb->glDeleteVertexArrays(1, &vao);
case APPLE:
vaoFuncs.helper->glDeleteVertexArrays(1, &vao);
break;
case NotSupported:
break;
@ -236,7 +248,8 @@ void QOpenGLVertexArrayObjectPrivate::bind()
vaoFuncs.core_3_0->glBindVertexArray(vao);
break;
case ARB:
vaoFuncs.arb->glBindVertexArray(vao);
case APPLE:
vaoFuncs.helper->glBindVertexArray(vao);
break;
case NotSupported:
break;
@ -258,7 +271,8 @@ void QOpenGLVertexArrayObjectPrivate::release()
vaoFuncs.core_3_0->glBindVertexArray(0);
break;
case ARB:
vaoFuncs.arb->glBindVertexArray(0);
case APPLE:
vaoFuncs.helper->glBindVertexArray(0);
break;
case NotSupported:
break;