diff options
| -rw-r--r-- | src/opengl/qglshaderprogram.cpp | 38 |
1 files changed, 35 insertions, 3 deletions
diff --git a/src/opengl/qglshaderprogram.cpp b/src/opengl/qglshaderprogram.cpp index 5e2f1f5..79484fa 100644 --- a/src/opengl/qglshaderprogram.cpp +++ b/src/opengl/qglshaderprogram.cpp @@ -106,6 +106,19 @@ QT_BEGIN_NAMESPACE \snippet doc/src/snippets/code/src_opengl_qglshaderprogram.cpp 2 + \section1 Binary shaders and programs + + Binary shaders may be specified using \c{glShaderBinary()} on + the return value from QGLShader::shaderId(). The QGLShader instance + containing the binary can then be added to the shader program with + addShader() and linked in the usual fashion with link(). + + Binary programs may be specified using \c{glProgramBinaryOES()} + on the return value from programId(). Then the application should + call link(), which will notice that the program has already been + specified and linked, allowing other operations to be performed + on the shader program. + \sa QGLShader */ @@ -632,8 +645,6 @@ bool QGLShaderProgram::addShader(QGLShader *shader) qWarning("QGLShaderProgram::addShader: Program and shader are not associated with same context."); return false; } - if (!shader->d_func()->compiled) - return false; if (!shader->d_func()->shaderGuard.id()) return false; glAttachShader(d->programGuard.id(), shader->d_func()->shaderGuard.id()); @@ -820,8 +831,20 @@ bool QGLShaderProgram::link() GLuint program = d->programGuard.id(); if (!program) return false; + GLint value; + if (d->shaders.isEmpty()) { + // If there are no explicit shaders, then it is possible that the + // application added a program binary with glProgramBinaryOES(), + // or otherwise populated the shaders itself. Check to see if the + // program is already linked and bail out if so. + value = 0; + glGetProgramiv(program, GL_LINK_STATUS, &value); + d->linked = (value != 0); + if (d->linked) + return true; + } glLinkProgram(program); - GLint value = 0; + value = 0; glGetProgramiv(program, GL_LINK_STATUS, &value); d->linked = (value != 0); value = 0; @@ -928,6 +951,15 @@ void QGLShaderProgram::release() GLuint QGLShaderProgram::programId() const { Q_D(const QGLShaderProgram); + GLuint id = d->programGuard.id(); + if (id) + return id; + + // Create the identifier if we don't have one yet. This is for + // applications that want to create the attached shader configuration + // themselves, particularly those using program binaries. + if (!const_cast<QGLShaderProgram *>(this)->init()) + return 0; return d->programGuard.id(); } |