C++ (Cpp) ReadFB Examples

Example #1

File: GLScreenBuffer.cpp Project: JuannyWang/gecko-dev

void
GLScreenBuffer::AssureBlitted()
{
    if (!mNeedsBlit)
        return;

    if (mDraw) {
        GLuint drawFB = DrawFB();
        GLuint readFB = ReadFB();

        MOZ_ASSERT(drawFB != 0);
        MOZ_ASSERT(drawFB != readFB);
        MOZ_ASSERT(mGL->IsSupported(GLFeature::framebuffer_blit));
        MOZ_ASSERT(mDraw->Size() == mRead->Size());

        ScopedBindFramebuffer boundFB(mGL);
        ScopedGLState scissor(mGL, LOCAL_GL_SCISSOR_TEST, false);

        BindReadFB_Internal(drawFB);
        BindDrawFB_Internal(readFB);

        const gfx::IntSize&  srcSize = mDraw->Size();
        const gfx::IntSize& destSize = mRead->Size();

        mGL->raw_fBlitFramebuffer(0, 0,  srcSize.width,  srcSize.height,
                                  0, 0, destSize.width, destSize.height,
                                  LOCAL_GL_COLOR_BUFFER_BIT,
                                  LOCAL_GL_NEAREST);
        // Done!
    }

    mNeedsBlit = false;
}

Example #2

File: GLScreenBuffer.cpp Project: JuannyWang/gecko-dev

void
GLScreenBuffer::BindReadFB(GLuint fb)
{
    if (!mGL->IsSupported(GLFeature::framebuffer_blit)) {
        NS_WARNING("READ_FRAMEBUFFER requested, but unsupported.");

        mGL->raw_fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, fb);
    } else {
        GLuint readFB = ReadFB();
        mUserReadFB = fb;
        mInternalReadFB = (fb == 0) ? readFB : fb;

        mGL->raw_fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, mInternalReadFB);
    }

#ifdef DEBUG
    mInInternalMode_ReadFB = false;
#endif
}

Example #3

File: GLScreenBuffer.cpp Project: RickEyre/mozilla-central

void
GLScreenBuffer::BindAsFramebuffer(GLContext* const gl, GLenum target) const
{
    GLuint drawFB = DrawFB();
    GLuint readFB = ReadFB();

    if (!gl->HasExt_FramebufferBlit()) {
        MOZ_ASSERT(drawFB == readFB);
        gl->raw_fBindFramebuffer(target, readFB);
        return;
    }

    switch (target) {
    case LOCAL_GL_FRAMEBUFFER:
        gl->raw_fBindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER_EXT, drawFB);
        gl->raw_fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, readFB);
        break;

    case LOCAL_GL_DRAW_FRAMEBUFFER_EXT:
        if (!gl->HasExt_FramebufferBlit())
            NS_WARNING("DRAW_FRAMEBUFFER requested but unavailable.");

        gl->raw_fBindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER_EXT, drawFB);
        break;

    case LOCAL_GL_READ_FRAMEBUFFER_EXT:
        if (!gl->HasExt_FramebufferBlit())
            NS_WARNING("READ_FRAMEBUFFER requested but unavailable.");

        gl->raw_fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, readFB);
        break;

    default:
        // In case we got a bad target.
        MOZ_NOT_REACHED("Bad `target` for BindFramebuffer.");
        gl->raw_fBindFramebuffer(target, 0);
        break;
    }
}

Example #4

File: GLScreenBuffer.cpp Project: JuannyWang/gecko-dev

void
GLScreenBuffer::BindAsFramebuffer(GLContext* const gl, GLenum target) const
{
    GLuint drawFB = DrawFB();
    GLuint readFB = ReadFB();

    if (!gl->IsSupported(GLFeature::framebuffer_blit)) {
        MOZ_ASSERT(drawFB == readFB);
        gl->raw_fBindFramebuffer(target, readFB);
        return;
    }

    switch (target) {
    case LOCAL_GL_FRAMEBUFFER:
        gl->raw_fBindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER_EXT, drawFB);
        gl->raw_fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, readFB);
        break;

    case LOCAL_GL_DRAW_FRAMEBUFFER_EXT:
        if (!gl->IsSupported(GLFeature::framebuffer_blit))
            NS_WARNING("DRAW_FRAMEBUFFER requested but unavailable.");

        gl->raw_fBindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER_EXT, drawFB);
        break;

    case LOCAL_GL_READ_FRAMEBUFFER_EXT:
        if (!gl->IsSupported(GLFeature::framebuffer_blit))
            NS_WARNING("READ_FRAMEBUFFER requested but unavailable.");

        gl->raw_fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, readFB);
        break;

    default:
        MOZ_CRASH("Bad `target` for BindFramebuffer.");
    }
}

Example #5

File: GLScreenBuffer.cpp Project: JuannyWang/gecko-dev

void
GLScreenBuffer::BindFB(GLuint fb)
{
    GLuint drawFB = DrawFB();
    GLuint readFB = ReadFB();

    mUserDrawFB = fb;
    mUserReadFB = fb;
    mInternalDrawFB = (fb == 0) ? drawFB : fb;
    mInternalReadFB = (fb == 0) ? readFB : fb;

    if (mInternalDrawFB == mInternalReadFB) {
        mGL->raw_fBindFramebuffer(LOCAL_GL_FRAMEBUFFER, mInternalDrawFB);
    } else {
        MOZ_ASSERT(mGL->IsSupported(GLFeature::framebuffer_blit));
        mGL->raw_fBindFramebuffer(LOCAL_GL_DRAW_FRAMEBUFFER_EXT, mInternalDrawFB);
        mGL->raw_fBindFramebuffer(LOCAL_GL_READ_FRAMEBUFFER_EXT, mInternalReadFB);
    }

#ifdef DEBUG
    mInInternalMode_DrawFB = false;
    mInInternalMode_ReadFB = false;
#endif
}